Textile fabric laser cutting equipment

Abstract

The invention belongs to the technical field of laser cutting equipment, and particularly relates to textile fabric laser cutting equipment which comprises a machine tool, a cross beam frame and a machine base, a laser generator is arranged on the machine base, a pre-pressing mechanism is arranged on the laser generator and comprises a sleeve and a floating block, and rotating shafts and bending supports are arranged at notches in the periphery of the floating block. The lower end of each bending support is provided with a roller for flattening wrinkles of the fabric and an air injection mechanism in the roller, and the air injection mechanism comprises an air cavity and an intermittent trigger assembly. In the process of performing laser cutting on stacked fabrics, pre-pressure can be applied to local fabrics near a heat source along with movement of a laser generator, wrinkles are smoothed, interlayer displacement is performed, meanwhile, cooling airflow is started, air films are formed on the upper layer and the lower layer of the fabrics, double-closed-loop control of mechanical pre-pressing and air film heat insulation is achieved through quenching treatment, and the fabric cutting efficiency is improved. Therefore, a heat conduction path is blocked, and the problem of non-uniform cutting caused by lower layer shrinkage is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser cutting equipment, and particularly relates to a textile fabric laser cutting equipment. BACKGROUND

[0002] The laser cutting equipment is an automatic equipment for cutting various materials (such as textile fabrics, leather, plastic, paper and the like) by using a high-energy-density laser beam, has the characteristics of high precision, high speed and non-contact processing, and the core working principle thereof is that high temperature generated by focusing of the laser beam makes the material instantaneously melt, gasify or reach the ignition point, so as to realize cutting. The laser cutting equipment mainly comprises a laser generating system, an optical transmission and focusing system, a mechanical movement system, an auxiliary gas system and a control system.

[0003] In the cutting process, for single-layer fabric, only the fabric needs to be unfolded and kept flat to avoid wrinkles affecting the cutting precision and positioning, and for stacked fabric, the fabric needs to be spread layer by layer, and then the edges of each layer of fabric are aligned to avoid wrinkles, and the edges of the fabric need to be assisted and limited by the scale line of the workbench or the positioning baffle. Transparent tape is usually used to limit the position between the layers of fabric to prevent temporary sliding of the stacked layers, but the transparent tape will have residues, and the transparent tape can only be attached to the edge of the fabric (away from the heat source), and the local wrinkles at the position of the heat source cannot be limited, so when the laser cuts the stacked fabric, especially for materials sensitive to the heat source or thin fabric, the lower layer of fabric is prone to local wrinkles due to heat shrinkage, resulting in uneven cutting precision (the essence is heat conduction accumulation and stress difference between layers, which cannot guarantee the consistency between layers), and the displacement between layers is accumulated, so that the more the number of stacked layers is, the greater the cutting deviation between the bottom layer and the top layer is, and the qualified rate of the finished product cannot be ensured.

[0004] In view of the problem that the lower layer of fabric deviates in the cutting process due to local wrinkles, manual trimming is usually performed after cutting by the laser equipment, but manual trimming cannot guarantee consistency, trimming errors are uncontrollable, trimming precision is determined by the experience of the workers, and problems such as "excessive trimming" or "insufficient trimming" may occur, and manual trimming is time-consuming and high in cost. SUMMARY

[0005] The application aims to provide a textile fabric laser cutting equipment to solve the problems in the background.

[0006] The technical scheme adopted by the application to solve the above technical problems is as follows:

[0007] The application discloses a laser cutting device for textile fabric, which comprises a machine tool, a cross beam frame and a machine base capable of moving along X, Y and Z three-axis directions, the cross beam frame is slidably connected to the machine tool, a laser generator is arranged on the machine base, a pre-pressure mechanism is arranged on the laser generator, the pre-pressure mechanism comprises a sleeve and a floating block, the sleeve and the floating block are slidably connected, pivots and bending supports on the pivots are arranged at positions of notches around the floating block, a cylinder and an air injection mechanism in the cylinder are arranged at lower ends of each of the bending supports, the air injection mechanism comprises an air cavity, an air outlet is arranged at one end of the air cavity, an intermittent trigger assembly is arranged on the air outlet, and the fabric can be intermittently air injected.

[0008] Preferably, the intermittent trigger assembly comprises a cover body, a moving plate and a guide disc with a wavy curved surface on one side surface, the moving plate linearly moves in the cover body, the guide disc is sleeved on the outside of the air outlet, a plug is arranged at the center position of the moving plate, the plug and the air outlet are located on the same central axis of the air cavity, a plurality of balls are equidistantly arranged at the circular hole position of the moving plate, and the balls move along the wavy curved surface of the guide disc, when the balls move to the wave crest of the wavy curved surface, the plug is separated from the air outlet to stop air injection, and when the balls move to the wave trough of the wavy curved surface, the plug is inserted into the air outlet to stop air injection.

[0009] Preferably, the intermittent trigger assembly further comprises a limiting disc, the limiting disc is arranged on the moving plate and limits the balls.

[0010] Preferably, a first spring is arranged at the interface position on one side of the plug, and one end of the first spring away from the plug is connected to one side of the inner wall of the cover body.

[0011] Preferably, a plurality of limiting sliding grooves are equidistantly arranged on the inner wall of the cover body, each limiting sliding groove is slidably connected to a limiting sliding block, and the limiting sliding blocks are arranged on the outer edge of the moving plate.

[0012] Preferably, an air inlet connector is threadedly connected to the air inlet end of the air cavity, an air inlet elbow is arranged on the air inlet connector, and the air inlet connector is connected to the interface on one side of the lower end of the bending support.

[0013] Preferably, a shaft seal is arranged between the air cavity and the cylinder, the shaft seal is located on one side of the air inlet end of the air cavity, a plurality of air outlet holes are equidistantly arranged around the cylinder, an end cover is arranged at one end of the cylinder, a mounting frame is arranged on the end cover, the mounting frame and the cover body are connected through screws, and the end cover and the interface on the other side of the lower end of the bending support are rotationally connected.

[0014] Preferably, a torsional spring is arranged in each annular groove on both sides of the upper end of the bending support, and the two force arms of the torsional spring are respectively inserted into the circular holes in the corresponding bending support and the notch of the floating block.

[0015] Preferably, a second spring is arranged between the floating block and the sleeve.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] (1) The present application sets up a machine tool, a beam frame, a machine base, a laser generator, a pre-pressure mechanism and a jet mechanism, in the process of laser cutting of stacked fabric, the hook generator moves downward along the Z-axis direction, the rollers in four directions will first contact the fabric and roll in four directions, flattening the wrinkles, ensuring that the surrounding of the initial cutting point is flat, speeding up the initial cutting progress, avoiding the problem of larger deviation caused by small deviation of the cutting point, thereby improving the precision of subsequent cutting, the rollers move horizontally on the fabric along the direction of the laser generator, for example, in the X-axis direction, since the laser generator is located between the two rollers in the X-axis direction, therefore, during the movement, there is always a roller in front of the cutting path of the laser generator, thereby applying pre-pressure to the local fabric near the heat source with the movement of the laser generator, flattening the wrinkles and limiting the displacement between the fabric layers;

[0018] Through the cooperation between the air cavity, the air outlet, the air inlet connector, the air inlet elbow, the shaft seal, the roller and the air outlet hole, while providing pre-pressure to the stacked fabric, the cooling airflow is opened, thereby forming an air film (such as Figure 8 ) on the upper and lower layers of the fabric for rapid cooling treatment, the upper air film can blow away the smoke, irritating odor and fine dust generated during cutting to avoid embedding into the fabric, and the inert gas (such as nitrogen) blown can inhibit the oxidation reaction, reduce carbonization, make the edge smoother, improve product quality and avoid the problem of excessive carbonization; the lower air film can block the heat conduction of the upper layer, reduce the problem of deformation wrinkles of the lower layer caused by temperature, and prevent the lower layer cutting edges from sticking together, causing the molten fibers to stick together and not easy to separate;

[0019] The present application uses "mechanical pre-pressure + air film heat insulation" double closed loop control to block the path of heat conduction, ensuring "uniformity between layers" and better balancing cutting efficiency and quality; through the regulation of heat energy and the management of interlayer stress, the problem of uneven cutting caused by lower layer shrinkage can be significantly improved, especially the high-precision demand of high-end garments and home textile fabrics in batch production can be met, ensuring the qualified rate of finished products and long-term stable operation of the equipment, compared with the traditional manual trimming method, time and labor are saved, labor cost is reduced, and the problems of "excessive trimming" or "insufficient trimming" are avoided.

[0020] (2) The present application sets the cover, the limiting sliding groove, the moving plate, the limiting sliding block, the guide disc, the ball, the plug, the limiting disc and the first spring, in the process of the rotation of the roller, when the laser generator moves to cut, the ball will move in the circumferential direction on the wave surface of the guide disc, so that the moving plate moves linearly in the central axis direction of the air cavity, when the ball moves to the wave crest of the wave surface, the plug is separated from the air outlet to release the air; when the ball moves to the wave trough of the wave surface, the plug is inserted into the air outlet to stop the air; so as to realize the intermittent release mode in the cutting process, reduce the friction between the airflow and the fabric, avoid the safety problem caused by the accumulation of static electricity (continuous airflow may cause the accumulation of static electricity), and reduce the energy consumption, to a certain extent, reduce the cost; and when the roller does not rotate, that is, the laser generator stops cutting, because the wave crest cannot support the ball, the ball will roll into the wave trough under the action of the first spring and be in a static state, at this time, the plug blocks the air outlet, plays the role of automatic closing, realizes the mode of "on-demand supply" of the protective gas, ensures the cutting quality, and realizes the multi-objective optimization of reducing the equipment energy consumption, maintenance cost and process stability.

[0021] The present application will be explained in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall structure schematic diagram of the present application;

[0023] Figure 2 It is the installation schematic diagram of the pre-pressure mechanism on the laser generator of the present application;

[0024] Figure 3 It is the exploded structure schematic diagram of the pre-pressure mechanism of the present application;

[0025] Figure 4 It is the internal structure schematic diagram of the roller of the present application;

[0026] Figure 5 It is the exploded structure schematic diagram of the intermittent trigger assembly of the present application;

[0027] Figure 6 It is the structure schematic diagram of the end cover of the present application;

[0028] Figure 7 It is the structure schematic diagram of the air cavity of the present application;

[0029] Figure 8 It is the airflow flow direction schematic diagram between the fabric layers under the action of the roller of the present application.

[0030] In the figure: 1, machine tool; 2, beam frame; 3, machine base; 4, laser generator; 5, pre-press mechanism; 51, sleeve; 52, floating block; 53, rotating shaft; 54, bending support; 55, roller; 551, air outlet hole; 56, end cover; 561, mounting bracket; 57, torsional spring; 58, second spring; 6, air jet mechanism; 61, air cavity; 611, air outlet; 62, air inlet connector; 63, air inlet elbow; 64, shaft seal; 7, intermittent trigger assembly; 71, cover body; 711, limiting sliding groove; 72, moving plate; 721, limiting sliding block; 73, guide disc; 74, ball; 75, plug; 76, limiting disc; 77, first spring. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings, which show several embodiments of the present application. However, the present application can be implemented in different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are for purposes of illustration and description only and are not intended to limit the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0034] Embodiment One

[0035] Please refer to Figures 1-8The utility model relates to a kind of textile fabric laser cutting equipment, including machine tool 1, crossbeam frame 2 and the machine base 3 movable along X, Y, Z three axial directions, crossbeam frame 2 slidingly connects on machine tool 1, laser generator 4 is provided on machine base 3, pre-pressure mechanism 5 is provided on laser generator 4, pre-pressure mechanism 5 includes sleeve 51 and floating block 52, sleeve 51 and floating block 52 are slidingly connected, the gap position of the periphery of floating block 52 is provided with rotating shaft 53 and the bending support 54 on rotating shaft 53, the lower end of each bending support 54 is provided with the roller 55 of flattening fabric fold and the air injection mechanism 6 in roller 55, air injection mechanism 6 includes air cavity 61, one end of air cavity 61 is provided with air outlet 611, and air outlet 611 is covered with intermittent trigger assembly 7, and fabric can be intermittently jetted.

[0036] Through the above structure, in the process of laser cutting to the upper and lower stacked fabric, the local fabric near the heat source can be pre-pressed with the movement of laser generator 4, the wrinkles are straightened, and the displacement between the fabric layers is limited, and at the same time, the cooling airflow is opened, the air film is formed between the upper and lower layers of the fabric, and the rapid cooling treatment is carried out, realizing the double closed loop control of "mechanical pre-pressing + air film heat insulation", to block the path of heat conduction, ensure the "interlayer consistency", and better balance the cutting efficiency and quality; through the regulation and management of thermal energy and interlayer stress, the problem of uneven cutting caused by lower layer shrinkage can be significantly improved, especially suitable for high-precision demand of batch production of high-end garments and home textile fabrics, to ensure the qualified rate of finished products and long-term stable operation of equipment, compared with traditional manual trimming method, time and labor are saved, labor cost is reduced, and the problems of "excessive trimming" or "insufficient trimming" are avoided.

[0037] Specific operation is as follows, in the process of cutting stacked fabric, laser generator 4 is first moved downward along Z axis, the roller 55 located in four directions will first contact with fabric, and roll in four directions, to flatten the wrinkles, ensure that the initial cutting point around laser is flat, then laser generator 4 starts laser cutting by aiming at cutting point, in the process of moving, for example, moving towards X axis, since laser generator 4 is located between the two rollers 55 of X axis direction, therefore, in the process of moving, there is always a roller 55 before the cutting path of laser generator 4, to roll and press (at this time, the two rollers 55 of Y axis direction are in sliding state with fabric, if moving along Y axis, then the two rollers 55 of X axis direction are in sliding state);

[0038] At the same time, the gas is injected into the air cavity 61 through the air inlet elbow 63 and the air inlet joint 62. Due to the rotation of the drum 55 in the X-axis direction, the moving plate 72 in the cover body 71 is driven to rotate through the mounting frame 561 on the end cover 56, so that the ball 74 moves in a circular motion on the annular wave surface of the guide disc 73, thereby enabling the moving plate 72 to move linearly back and forth in the central axis direction of the air cavity 61. When the ball 74 moves to the wave crest of the wave surface, the plug 75 is driven by the moving plate 72 to move away from the gas outlet 611 to release the gas. When the ball 74 is rotated to the wave trough of the wave surface under the action of the first spring 77, the plug 75 is inserted into the gas outlet 611 to stop the gas, thereby achieving intermittent gas release. The gas discharged from the gas outlet 611 enters the space formed by the end cover 56, the shaft seal 64, the outer wall of the air cavity 61 and the inner wall of the drum 55, and then is sprayed out from the gas outlet hole 551, thereby blocking heat conduction (at this time, the two drums 55 in the Y-axis direction slide on the fabric and do not rotate, so there is no gas release, thereby not interfering with the gas in the X-axis direction, which is not conducive to dispersing the smoke, and vice versa); after cutting is stopped, the ball 74 rolls into the wave trough under the action of the first spring 77 to be in a static state because the wave crest cannot support the ball 74. At this time, the plug 75 blocks the gas outlet 611 to be automatically closed.

[0039] Example Two

[0040] Please refer to Figure 3 , 4 and 6, the air cavity 61 and the drum 55 are provided with the shaft seal 64, and the shaft seal 64 is located on the gas inlet side of the air cavity 61. The drum 55 is provided with a plurality of gas outlet holes 551 at equal intervals around the drum 55. The drum 55 is provided with the end cover 56 at one end. After the gas is discharged from the gas outlet hole 611, the gas enters the space formed by the shaft seal 64, the end cover 56, the outer wall of the air cavity 61 and the inner wall of the drum 55. The end cover 56 is provided with the mounting frame 561. The mounting frame 561 and the cover body 71 are connected by screws. The end cover 56 and the interface on the other side of the lower end of the bent support 54 are rotationally connected. Under the action of the shaft seal 64, the drum 55 stably rotates on the air cavity 61. The drum 55 drives the moving plate 72 on the cover body 71 to rotate through the end cover 56 and the mounting frame 561. Since the guide disc 73 does not rotate on the air cavity 61, the ball 74 moves on the wave surface of the guide disc 73. The torsional spring 57 is arranged in the annular groove on each upper end of the bent support 54. The two force arms of the torsional spring 57 are respectively inserted into the circular holes in the corresponding gaps of the bent support 54 and the floating block 52. The second spring 58 is arranged between the floating block 52 and the sleeve 51. Through the torsional spring 57 and the second spring 58, the floating block 52 and the bent support 54 are reset when the laser generator 4 moves along the Z-axis.

[0041] Example Three

[0042] Please refer to Figure 5 and7 The intermittent triggering assembly 7 comprises a cover 71, a moving plate 72 and a guide disc 73 with a wavy surface on one side surface, the moving plate 72 moves linearly in the cover 71, the guide disc 73 is sleeved outside the air outlet 611, the center position of the moving plate 72 is provided with a plug 75, the plug 75 and the air outlet 611 are located on the same central axis of the air cavity 61, a plurality of balls 74 are arranged at equal intervals in the circular hole position of the moving plate 72, and the balls 74 move along the wavy surface of the guide disc 73, when the balls 74 move to the wave crest of the wavy surface, the plug 75 is separated from the air outlet 611 to release the air; when the balls 74 move to the wave trough of the wavy surface, the plug 75 is inserted into the air outlet 611 to stop the air; the balls 74 move in the circumferential direction on the annular wavy surface of the guide disc 73, so that the moving plate 72 drives the plug 75 to move linearly in the central axis direction of the air cavity 61, and intermittent air release is realized; the intermittent triggering assembly 7 further comprises a limiting disc 76, the limiting disc 76 is located on the moving plate 72 and abuts against the balls 74, the limiting disc 76 limits the balls 74, so as to avoid the balls 74 from shaking in the central axis direction of the air cavity 61; a first spring 77 is arranged at the interface position on one side of the plug 75, one end of the first spring 77 away from the plug 75 is connected with one side of the inner wall of the cover 71, the first spring 77 enables the balls 74 to move closely to the wavy surface of the guide disc 73, a plurality of limiting sliding grooves 711 are arranged at equal intervals on the inner wall of the cover 71, each limiting sliding groove 711 is slidingly connected with a limiting sliding block 721, and the limiting sliding block 721 is arranged on the outer edge of the moving plate 72, the limiting sliding block 721 and the limiting sliding groove 711 are matched, so as to realize the linear movement of the moving plate 72 in the cover 71; an air inlet connector 62 is threadedly connected with the air inlet end of the air cavity 61, an air inlet elbow 63 is arranged on the air inlet connector 62, and the air inlet connector 62 is connected with the interface on one side of the lower end of the bending support 54, the air inlet connector 62 and the air inlet elbow 63 are matched, so as to realize the introduction of the protective gas, and the interface between the air inlet connector 62 and one end of the bending support 54 is in a locking state, so that the air cavity 61 is not rotated.

[0043] The above describes the application with reference to the drawings, and it is obvious that the specific implementation of the application is not limited to the above manner, as long as the method concept and technical scheme of the application are adopted for such non-essential improvement or the concept and technical scheme of the application are directly applied to other occasions without improvement, which are all within the protection scope of the application.

Claims

1. A textile fabric laser cutting device, comprising a machine tool (1), a beam frame (2) and a machine base (3) movable along the X, Y and Z axes, wherein the beam frame (2) is slidably connected to the machine tool (1), and a laser generator (4) is provided on the machine base (3), characterized in that: The laser generator (4) is provided with a pre-pressure mechanism (5), the pre-pressure mechanism (5) comprising a sleeve (51) and a floating block (52), the sleeve (51) and the floating block (52) being in sliding connection, the notch positions around the floating block (52) being provided with a rotating shaft (53) and a bending bracket (54) on the rotating shaft (53), the lower end of each bending bracket (54) being provided with a roller (55) for flattening wrinkles of the material and an air jet mechanism (6) in the roller (55), the air jet mechanism (6) comprising an air cavity (61), one end of the air cavity (61) being provided with an air outlet (611), and the air outlet (611) being covered with an intermittent trigger component (7), which can intermittently jet the fabric.

2. The textile fabric laser cutting device according to claim 1, characterized in that: The intermittent trigger assembly (7) comprises a cover (71), a movable plate (72) and a guide plate (73) with a wavy surface on one side. The movable plate (72) moves linearly in the cover (71). The guide plate (73) is sleeved on the outside of the air outlet (611). A plug (75) is provided at the center of the movable plate (72). The plug (75) and the air outlet (611) are located on the same central axis of the air cavity (61). A plurality of balls (74) are provided at equal intervals at the circular hole position of the movable plate (72). The balls (74) move along the wavy surface of the guide plate (73). When the balls (74) move to the crest of the wavy surface, the plug (75) is separated from the air outlet (611) to release air. When the balls (74) move to the trough of the wavy surface, the plug (75) is inserted into the air outlet (611) to stop air.

3. The textile fabric laser cutting device according to claim 2, characterized in that: The intermittent trigger assembly (7) further comprises a limiting plate (76), which is located on the movable plate (72) and provides limiting resistance to the ball (74).

4. The textile fabric laser cutting device according to claim 2, characterized in that: A first spring (77) is provided at an interface position on one side of the plug (75), and one end of the first spring (77) away from the plug (75) is connected to one side of the inner wall of the cover body (71).

5. The textile fabric laser cutting device according to claim 4, characterized in that: A plurality of limiting sliding grooves (711) are arranged at equal intervals around the inner wall of the cover body (71), each limiting sliding groove (711) is slidably connected to a limiting sliding block (721), and the limiting sliding block (721) is arranged on the outer edge of the movable plate (72).

6. The textile fabric laser cutting device according to claim 2, characterized in that: An air inlet connector (62) is threadedly connected to one air inlet end of the air cavity (61), an air inlet elbow (63) is provided on the air inlet connector (62), and the air inlet connector (62) is connected to an interface on one side of the lower end of the bending bracket (54).

7. The textile fabric laser cutting device according to claim 6, characterized in that: A shaft seal (64) is provided between the air cavity (61) and the roller (55), and the shaft seal (64) is located on the air inlet side of the air cavity (61). A plurality of air outlet holes (551) are provided on the roller (55) at equal intervals. An end cover (56) is provided at one end of the roller (55), and a mounting bracket (561) is provided on the end cover (56). The mounting bracket (561) and the cover body (71) are connected by screws, and the end cover (56) and the interface on the other side of the lower end of the bending bracket (54) are rotatably connected.

8. The textile fabric laser cutting device according to claim 7, characterized in that: A torsion spring (57) is provided in the annular grooves on both sides of the upper end of each bending bracket (54), and the two force arms of the torsion spring (57) are respectively inserted into the circular holes at the notches of the corresponding bending bracket (54) and the floating block (52).

9. The textile fabric laser cutting device according to claim 8, characterized in that: A second spring (58) is provided between the floating block (52) and the sleeve (51).

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