Automatic feeding device of laser pipe cutting machine with material warehouse

Abstract

The invention discloses a laser pipe cutting machine automatic feeding device with a material warehouse, and relates to the technical field of laser pipe cutting machines, the laser pipe cutting machine automatic feeding device comprises the material warehouse, a discharge limiting mechanism, a screening feeding mechanism and a feeding manipulator, the material warehouse comprises a material belt used for placing pipes, and the discharge limiting mechanism is arranged at a discharge port of the material warehouse; the screening feeding mechanism comprises a width limiting assembly, a screening area is formed between one end of the width limiting assembly and the discharging port, and the width of the screening area can be adjusted. The feeding mechanical arm is installed at the tail end of the screening and feeding mechanism, and the pipes flow out of the discharging port through the discharging limiting mechanism and slide downwards to enter the feeding mechanical arm through the screening and feeding mechanism. The discharge limiting mechanism comprises a height limiting rocker arm and an adjusting screw, and the height limiting rocker arm is hinged to the material warehouse to adjust the height of the discharge port; through cooperation of the material warehouse, the limiting mechanism and the screening and feeding mechanism, the height of a discharging opening and the width of a screening area can be adjusted, the pipes are sequentially absorbed and received one by one, the problem of follow-up material blocking caused by gushing of multiple pipes fed at a time is avoided, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser tube cutting machines, and in particular to an automatic feeding device of a laser tube cutting machine with a material storage. Background Art

[0002] Laser tube cutting machines have the advantages of energy saving, high cutting precision and high efficiency. However, during the continuous feeding process of the laser tube cutting machine with a material warehouse, as the material belt is gradually tightened and straightened, the tubes rub against each other or bend and intertwine, and are easily "sticked" together, resulting in the tubes not necessarily being discharged in sequence, and sometimes the tubes burst out of the warehouse in a concentrated manner.

[0003] Since the cross-sectional shapes of customers' pipes are inconsistent, some are thick and some are thin, and the cross-sectional areas are different, specifically, the "material width" and "material height" are different, which brings new challenges to the traditional feeding mechanism: for pipes of different sizes on the traditional feeding machine, the material warehouse either does not discharge the material, or several pipes are concentrated and flow out of the material warehouse at once, especially for thin pipes, which causes congestion in the subsequent processes and is forced to stop the machine. Normal production can only be resumed after manual intervention. It is time-consuming and laborious to deal with the problem, which seriously affects the efficiency of pipe cutting. Especially for the processing of thin pipes, it greatly reduces production efficiency and also increases labor costs. Summary of the invention

[0004] In view of one or more deficiencies in the above-mentioned prior art, the present invention provides an automatic feeding device for a laser pipe cutting machine with a material warehouse, which has a discharge limiting mechanism for limiting the discharge of pipes and a screening feeding mechanism for screening the width and height of pipes, thereby avoiding congestion caused by multi-layer gushing of pipes, and does not require repeated manual intervention in the feeding machine status. The device has stable and reliable functions, can realize fully automatic feeding within a material warehouse cycle, and effectively improves production efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] An automatic feeding device for a laser tube cutting machine with a material storehouse comprises a material storehouse, a limiting mechanism, a screening feeding mechanism and a feeding manipulator, wherein the material storehouse comprises a material belt for placing tubes, and a limiting mechanism is arranged at a discharge port of the material storehouse for single-layer discharge of tubes; the screening feeding mechanism is installed at one side of the discharge port, and the screening feeding mechanism comprises a width limiting component, and a screening area is formed between one end of the width limiting component and the discharge port, and the width of the screening area can be adjusted; the feeding manipulator is installed at the end of the screening feeding mechanism, and the tube flows out of the discharge port through the limiting mechanism, and slides down through the screening feeding mechanism into the feeding manipulator;

[0007] The discharge limiting mechanism includes a height limiting rocker arm and an adjusting screw. The height limiting rocker arm is installed above the material storage and extends to the discharge port. The height limiting rocker arm is hingedly connected to the material storage and is used to adjust the opening height of the discharge port. The adjusting screw is installed at the tail end of the height limiting rocker arm and is used to adjust the fastening state of the tail end of the height limiting rocker arm.

[0008] As a further implementation method, the material warehouse also includes a support frame, a material belt support wheel, a material belt reel and a reel motor, the material belt is arranged in the support frame for storing pipes; the material belt support wheel is installed on the support frame and is arranged at the discharge port, one end of the material belt extends from the material belt support wheel and is wound around the material belt reel, and the material belt reel is driven by the reel motor to release or tighten the material belt; when the material belt is released, the height of the coiled material decreases, and when the material belt is tightened and straightened, the height of the pipe on the material belt rises and can flow out from the discharge port.

[0009] As a further implementation method, the height limiting rocker arm is slidably connected to the support frame through a copper sleeve rotating shaft, and the height difference between the head end of the height limiting rocker arm and the material belt support wheel changes with the rotation of the height limiting rocker arm, that is, the discharge height of the discharge port is changed.

[0010] As a further implementation method, the screening and feeding mechanism includes an inclined feeding bracket and an optical axis slide rail installed on one side of the support frame. The optical axis slide rail is obliquely arranged on the top surface of the inclined feeding bracket to transport the pipe from the discharge port to the feeding robot.

[0011] As a further implementation method, the screening and feeding mechanism also includes a screening mounting base installed on the outside of the optical axis slide rail, and the width limiting component is installed on the side of the screening mounting base away from the optical axis slide rail; the width limiting component includes a screening cylinder slide plate and a screw nut mechanism, the screening cylinder slide plate is slidingly connected to the screening mounting base along a first direction, and the screw nut mechanism drives the screening cylinder slide plate to move relative to the screening mounting base, so as to adjust the width of the screening area. The width can screen the material width to achieve the effect that only one pipe can exist in the width direction.

[0012] As a further implementation method, the screw nut mechanism includes a trapezoidal self-locking screw, a screw nut seat and a screw moving seat; the trapezoidal self-locking screw cooperates with the screw nut seat, the screw moving seat is fixed to the end of the trapezoidal self-locking screw and is fixedly connected to the screening cylinder slide plate; the other end of the trapezoidal self-locking screw is installed with a width adjustment handle.

[0013] As a further implementation method, the screening and feeding mechanism also includes a lifting and adjusting component, which is slidably connected to the width limiting component; the lifting and adjusting component includes a lifting cylinder and a screening Z-axis slide, and the screening Z-axis slide is slidably connected to the screening cylinder slide along the second direction, the top of the telescopic rod of the lifting cylinder is connected to the screening Z-axis slide, and the lower part of the lifting cylinder is connected to the screening cylinder slide.

[0014] As a further implementation method, a limited height three-axis cylinder is installed on the top of the screening Z-axis slide close to the optical axis slide rail, and the telescopic rod of the limited height three-axis cylinder can be extended to the screening area to push away excess pipes in height.

[0015] As a further implementation method, the screening rack slide is slidably connected to the screening mounting base via a third guide rail and a third slider, and the height can be finely adjusted by driving the height-limiting three-axis cylinder to move up and down through a lifting and adjusting component.

[0016] As a further implementation method, a signal detection mechanism is installed on the inner side of the optical axis slide rail, and the signal detection mechanism includes a proximity switch and a material level sensing swing arm. The material level sensing swing arm is close to the discharge port, and the proximity switch adopts a photoelectric proximity sensing switch, and the proximity switch is connected to the electric control cabinet.

[0017] As a further implementation method, an electric control cabinet is also included, and the material storage, screening and feeding mechanism and limiting mechanism are all connected to the electric control cabinet.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0019] 1. The present invention places the pipes to be processed in the material warehouse through the coordination of the material warehouse, the limiting mechanism and the screening and feeding mechanism, and adjusts the height of the outlet where the pipes gush out and the width space of the screening area to match the pipes, and absorbs and accepts the pipes one by one in sequence, avoiding the problem of subsequent material jamming caused by the gush of multiple pipes at one time, and there is no need for manual repeated intervention in the material jamming problem of the feeder, which greatly improves the production efficiency.

[0020] 2. The present invention adjusts the height of the discharge pocket through the coordination of the height-limiting rocker arm, adjusting screws and other structures of the limiting mechanism, thereby realizing height-limited screening when the pipes are discharged from the material warehouse, realizing single-layer discharge of the pipes, and avoiding the discharge of multiple pipes or multiple layers; through the coordination of the width-limiting component and the lifting and adjusting component of the screening and feeding mechanism, the width of the screening area between the discharge port and the screening and feeding mechanism can be adjusted to realize width-limited screening, which effectively realizes the screening of a single pipe before feeding, thereby improving production efficiency.

[0021] 3. The limiting mechanism and screening feeding mechanism of the present invention can adapt to pipes of different specifications to realize single-pipe screening, and improve the response efficiency of screening after the pipes are discharged, with a wide range of adaptability and stable and reliable performance.

[0022] 4. The present invention can adjust the height difference between the bottom surface of the height-limiting three-axis cylinder and the optical axis slide rail by installing a height-limiting three-axis cylinder on the top of the screening Z-axis slide plate, which is used to deal with the abnormal situation that two pipes may be stacked up and down in extreme cases, further ensuring the realization of single pipe loading and reducing the accidental shutdown due to loading congestion.

[0023] 5. The present invention drives the screening rack slide to rise and fall through the gear rack structure, and can fine-tune the height of the height-limiting three-axis cylinder according to the size of the pipe and actual needs, thereby achieving an auxiliary height-limiting effect on the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the present invention;

[0026] Figure 2 This is a front schematic diagram of a single group of feeding modules in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the screening and feeding mechanism in an embodiment of the present invention;

[0028] Figure 4 It is a partial schematic diagram of the screening and feeding mechanism in the embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the width limiting component and the lifting and lowering adjustment component in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the Z-axis slide in the embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the height-limiting rocker arm structure in an embodiment of the present invention.

[0032] In the figure: 1. Material warehouse; 2. Limiting mechanism; 3. Screening and feeding mechanism; 4. Feeding manipulator; 5. Pipes; 6. Pipe alignment plate; 7. Electric control cabinet;

[0033] 101, support frame; 102, material belt; 103, material outlet; 104, material belt support wheel; 105, material belt reel; 106, reel motor;

[0034] 201, height-limiting rocker arm; 202, copper sleeve rotating shaft; 203, adjusting screw; 204, adjusting wire seat;

[0035] 301, feeding inclined bracket; 302, optical axis slide rail; 303, screening installation base; 304, width limiting component; 305, lifting and lowering adjustment component; 306, auxiliary height limiting component; 307, signal detection mechanism;

[0036] 304-1, screening rack slide; 304-2, screening cylinder slide; 304-3, trapezoidal self-locking screw; 304-4, screw nut seat; 304-5, screw moving seat; 304-6, width adjustment handle;

[0037] 305-1, screening Z-axis slide; 305-2, lifting cylinder; 305-3, cylinder fixing seat;

[0038] 306-1, height-limiting three-axis cylinder; 306-2, height-limiting rack; 306-3, height-limiting gear; 306-4, limit block;

[0039] 307-1, material level sensing swing arm; 307-2, proximity switch;

[0040] 401. Synchronous belt; 402. Synchronous pulley. DETAILED DESCRIPTION

[0041] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] Embodiment 1

[0044] In a typical embodiment of the present application, an automatic feeding device for a laser tube cutting machine with a material storage is provided, such as Figure 1-7As shown, it includes a material warehouse 1, a limiting mechanism 2, a screening and feeding mechanism 3 and a feeding manipulator 4. The material warehouse 1 includes a material belt 102 for placing pipes. The limiting mechanism 2 is arranged at the discharge port 103 of the material warehouse for single-layer discharge of pipes; the screening and feeding mechanism 3 is installed at one side of the discharge port, and the screening and feeding mechanism 3 includes a width limiting component 304. A screening area is formed between one end of the width limiting component 304 and the discharge port, and the width of the screening area can be adjusted; the feeding manipulator 4 is installed at the end of the screening and feeding mechanism 3, and the pipe 5 flows out from the discharge port 103 through the limiting mechanism 2, and slides down through the screening and feeding mechanism 3 into the feeding manipulator 4;

[0045] The limiting mechanism 2 includes a height limiting rocker arm 201 and an adjusting screw 203. The height limiting rocker arm 201 is installed above the material storage and extends to the discharge port 103. The height limiting rocker arm 201 is hingedly connected to the material storage 1 for adjusting the opening height of the discharge port. The adjusting screw 203 is installed at the tail end of the height limiting rocker arm 201 for adjusting the fastening state of the tail end of the height limiting rocker arm.

[0046] Specifically, in practical applications, Figure 1 As shown, the automatic feeding device of this embodiment includes a plurality of feeding modules arranged in parallel, and the plurality of feeding modules are arranged along the length direction of the pipe to ensure the stability of the pipe feeding. The number of feeding modules can be selected and arranged according to the length of the pipe and actual needs. This embodiment adopts 4 groups of feeding modules. A pipe alignment plate 6 is installed on one side of the edge feeding module, which is used to align the pipes in the feeding module as a whole. An electric control cabinet 7 can be placed on one side of the pipe alignment plate 6. The electric control cabinet 7 is provided with an operation panel to display various parameters. A universal brake wheel is designed at the bottom of the electric control cabinet to facilitate the operator to drag the electric control box according to visual habits and on-site environment. The electric control cabinet 7 is connected to all feeding modules to control the feeding process of the pipe to realize automatic feeding.

[0047] Specifically for the structure of a single group of loading modules, such as Figure 2 As shown, the feeding module is composed of a material warehouse 1, a limiting mechanism 2, a screening feeding mechanism 3 and a feeding robot 4. During the feeding process of the pipe cutting procedure, the pipe 5 is released from the material warehouse 1, flows out from the discharge port 103 in a single layer after being restricted by the limiting mechanism 2, and slides down into the feeding robot 4 after being screened by the screening feeding mechanism 3 for cutting.

[0048] In this embodiment, Figure 2As shown, the material warehouse 1 includes a support frame 101, a material belt 102, a discharge port 103, a material belt support wheel 104, a material belt reel 105 and a reel motor 106. The material belt 102 is arranged in the support frame 101 for storing pipes, and the discharge port 103 is located on one side of the support frame. The material belt support wheel 104 is installed on the support frame and arranged at the discharge port 103. One end of the material belt 102 extends from the material belt support wheel 104 and is wound on the material belt reel 105. The material belt reel 105 is driven by the reel motor 106 to release or tighten the material belt. When the material belt is loosened, the height of the coiled material decreases. When the material belt is tightened and straightened, the height of the pipe on the material belt rises until it flows out of the discharge port.

[0049] In order to solve the problem that thin pipes tend to flow out of the material warehouse and affect subsequent processing, this embodiment provides a limiting mechanism above the discharge port to adjust the height of the discharge port. The height of the discharge port matches the size of the pipes. By limiting the height of the first layer of pipes, only one layer of pipes can flow out of the discharge port at a time.

[0050] Specifically, Figure 2 As shown, the limit mechanism 2 includes a height-limiting rocker arm 201, a copper sleeve rotating shaft 202, an adjusting wire seat 204 and an adjusting screw 203. The height-limiting rocker arm 201 is welded by a horizontal tube 201-1 and two vertical tubes to form a U-shaped structure with an opening downward, such as Figure 7 As shown, the lower end of the first vertical tube 201-2 is located at the discharge port, and the height difference between the first vertical tube 201-2 and the material belt support wheel determines the longitudinal opening size of the discharge port 103. When it contacts the material belt support wheel, the discharge port is completely closed. A copper sleeve rotating shaft 202 is fixedly provided on one side of the second vertical tube 201-3, and the copper sleeve rotating shaft 202 is hinged with the support frame 101. The height-limiting rocker arm 201 can rotate around the copper sleeve rotating shaft 202, thereby driving the first vertical tube 201-2 to approach or move away from the material belt support wheel 104, so as to achieve the height adjustment of the discharge port. Furthermore, an adjusting screw 203 is provided at the bottom of the second vertical tube 201-3. The adjusting screw 203 cooperates with the adjusting wire seat 204 fixed on the support frame to adjust the distance and fastening state of the connection between the second vertical tube and the support frame. When the discharge port is adjusted to the set height, tighten the adjusting screw to fix the height-limiting rocker arm so that it no longer rotates. In this embodiment, in order to better control the state of the first vertical pipe, a reinforcing rib 201-4 is welded between the second vertical pipe 201-3 and the cross pipe 201-1, which can improve the strength of the rear end of the height-limiting rocker arm. In this embodiment, the height-limiting rocker arm is made of high-quality carbon structural steel (Q235A) square tube, which has high rigidity, light weight, easy welding and low material cost.

[0051] In order to further avoid subsequent congestion caused by the simultaneous loading of several pipes during the pipe loading process, the screening and loading mechanism of this embodiment can first screen a single pipe and then transport the pipe to the feeding robot.

[0052] like Figure 3-4 As shown, the screening and feeding mechanism 3 includes a feeding inclined bracket 301 installed on one side of the support frame, and the top surface of the feeding inclined bracket 301 is installed with an optical axis slide rail 302 inclined downward to the feeding robot side, which is used to transport the pipe from the discharge port to the feeding robot 4. The optical axis slide rail is set as a circular rail, so that the pipe can slide down to the feeding robot for feeding under the action of gravity after being released.

[0053] In order to realize single-piece feeding of pipes and ensure operation efficiency, the screening feeding mechanism 3 also includes a width limiting component 304 and a lifting and adjusting component 305 , both of which are installed on the screening mounting base 303 and are located on the outside of the optical axis slide rail 302 .

[0054] Specifically, Figure 3-5 As shown, the screening and feeding mechanism 3 includes a screening mounting base 303, which is fixedly mounted on the outer side of the optical axis slide rail 302. A limited width component 304 and a lifting and adjusting component 305 for adjusting the height of the limited width component are arranged on the side of the screening mounting base facing away from the optical axis slide rail. When working, the lifting and adjusting component can drive the limited width component to rise to a set height above the optical axis slide rail to block the pipe. The width limiting component can be adjusted to adjust the width of the screening area at the discharge port to achieve the effect that only one material can exist in the width direction, thereby avoiding the stacking of pipes.

[0055] In this embodiment, the width limiting component 304 includes a screening rack slide 304-1 and a screening cylinder slide 304-2. The screening rack slide 304-1 is installed on the back of the screening mounting base 303. The screening rack slide 304-1 is provided with a first guide rail extending along a first direction. The screening cylinder slide 304-2 is slidably connected to the screening rack slide 304-1 through a first slider and a first guide rail. A screw nut mechanism is installed at the bottom end of the screening cylinder slide 304-2 for driving the screening cylinder slide to move relative to the screening rack slide along the first direction. Figure 5 As shown, the screw nut mechanism is composed of a trapezoidal self-locking screw 304-3, a screw nut seat 304-4 and a screw moving seat 304-5. The screw nut seat 304-4 is fixedly mounted on the back of the screening rack slide 304-1. The trapezoidal self-locking screw 304-3 cooperates with the screw nut seat 304-4 to achieve forward and backward movement. The end of the trapezoidal self-locking screw 304-3 is fixedly connected to the screw moving seat 304-5, and the screw moving seat 304-5 is fixedly mounted at the bottom of the screening cylinder slide, which can drive the screening cylinder slide to move forward and backward relative to the screening rack slide. To facilitate width adjustment, a width adjustment handle 304-6 is installed at the other end of the trapezoidal self-locking screw 304-3 for easy operation and control.

[0056] Considering that the width-limiting component needs to block when screening pipes, but cannot affect the transportation of pipes after screening, in this embodiment, a lifting and adjusting component 305 is also installed in the screening and feeding mechanism to control the width-limiting component to be at different height positions in the screening and non-screening states. Specifically, the lifting and adjusting component 305 includes a screening Z-axis slide 305-1 that is slidably connected to the screening cylinder slide and a lifting cylinder 305-2 for driving. The screening Z-axis slide 305-1 is installed on the back of the screening cylinder slide 304-2 through a second guide rail and a second slider. The second guide rail extends along the second direction. The screening Z-axis slide 305-1 moves linearly up and down relative to the screening cylinder slide under the drive of the lifting cylinder to change the height. The lifting cylinder 305-2 is arranged parallel to the screening Z-axis slide 305-1. The lower part of the lifting cylinder 305-2 is installed on the back of the screening cylinder slide through the cylinder fixing seat 305-3. The top of the telescopic rod of the lifting cylinder 305-2 is fixedly connected to the screening Z-axis slide 305-1, which can drive the screening Z-axis slide to move along the second direction to change the height.

[0057] During screening, the lifting cylinder drives the top of the screening Z-axis slide to rise to the position set above the optical axis slide rail. At this time, a screening area for pipes is formed between the edge of the screening Z-axis slide rail and the discharge port. The width of the screening area is adjusted to a width that is adapted to the diameter of the pipe by moving the screening Z-axis slide rail forward and backward to ensure that there is only one material in the screening area in the width direction. After the screening is completed, the lifting cylinder quickly retracts to drive the screening Z-axis slide rail to a position below the upper busbar of the optical axis slide rail to ensure that the pipe slides smoothly along the optical axis slide rail and is transmitted to the feeding robot. It should be pointed out that in order to improve the action response speed when materials need to be screened, the present embodiment adopts a lifting cylinder, and the lifting cylinder is set to a fixed stroke, such as 0-300, in order to drive the screening Z-axis slide rail to switch quickly between the highest and lowest positions, improve the response speed, and meet the needs of single-root screening when discharging pipes, while shortening the screening time and improving production efficiency.

[0058] Among them, for the second direction and the first direction, combined with the attached Figure 2-6 It is easy to understand that in this embodiment, when the screening and feeding mechanism is processed separately, the first direction can be a horizontal direction, and the corresponding second direction is a vertical direction; and after the screening and feeding mechanism is installed on the optical axis slide rail, as shown in the figure, the top surface of the screening mounting base is arranged parallel to the inclined optical axis slide rail. Therefore, in the entire feeding device, the first direction is the extension direction parallel to the optical axis slide rail, and the second direction is the direction perpendicular to the optical axis slide rail. The width of the screening area can be better controlled to screen the pipes by width, so as to achieve the effect that only one pipe can exist in the width direction, thereby realizing the transportation of pipes one by one and avoiding pile-up.

[0059] In addition, considering that the height of the screening Z-axis slide needs to be fine-tuned due to different sizes of pipes or other reasons, in a preferred embodiment, the screening rack slide 304-1 is installed on the back of the screening mounting base 303 in a sliding connection manner, and a gear rack mechanism is provided to drive the screening rack slide to slide relative to the screening mounting base to adjust the height. Specifically, Figure 3 , 5 As shown, the screening mounting base 303 is provided with a third guide rail extending in the second direction, and the screening rack slide 304-1 is slidably connected to the screening mounting base 303 through the third slider and the third guide rail. A height-limiting rack 306-2 and a height-limiting gear 306-3 are installed at one end of the screening rack slide 304-1, wherein the height-limiting rack 306-2 is fixedly arranged on the screening rack slide 304-1 and parallel to the third guide rail, and the height-limiting gear 306-3 can be rotated to drive the screening rack slide 304-1 to adjust the upper and lower heights through the height-limiting rack 306-2, thereby driving the entire width-limiting assembly and the lifting and lowering adjustment assembly to rise and fall, and realizing continuous fine adjustment of the height of the screening Z-axis slide.

[0060] In order to ensure that the lifting height of the screening rack slide does not affect the operation of other components and to improve the safety of the device during adjustment, limit blocks 306-4 are respectively installed on the upper and lower parts of the screening mounting base 303 to limit the up and down movement of the screening rack slide, to ensure that the screening rack slide is still not higher than the optical axis slide rail when it moves to the highest position, to avoid affecting the pipe transmission, and to protect the screening rack slide from falling off the third guide rail from the lower part.

[0061] In addition, based on the above technical solution, in this embodiment, the height of the discharge port is adjusted by adjusting the height-limiting rocker arm to limit the single-layer discharge of the pipe, and the screening width is adjusted by the cooperation of the lifting and lowering adjustment component and the width-limiting component, so that after the pipe is discharged, there is only a single pipe in the width direction at the top of the optical axis slide rail. However, considering some extreme abnormal conditions, the pipes discharged in a single layer at the discharge port are stacked up and down into two or more layers in the screening area at the top of the optical axis slide rail. At this time, if the screening and feeding mechanism returns to its original position, multiple pipes will still slide down and feed at the same time, which is easy to cause congestion in the subsequent process and forced to stop, affecting the efficiency of pipe cutting.

[0062] To solve this problem, in this preferred embodiment, an auxiliary height limiting component 306 is also designed in the screening and feeding mechanism. Specifically, Figure 3 , 5As shown, a height-limiting three-axis cylinder 306-1 is fixedly installed on the top of the screening rack slide, and the telescopic rod of the height-limiting three-axis cylinder 306 can be extended or retracted in the first direction. When there are more than one layer of pipes in the screening area in the height direction, the adjustable height-limiting gear 306-3 drives the screening rack slide 304-1 to move up and down through the height-limiting rack 306-2, so as to adjust the height-limiting three-axis cylinder to a matching position, and then start the height-limiting three-axis cylinder 306-1. The telescopic rod extends to push out the pipes above the bottom pipes, ensuring that there is only one pipe at the height, thereby effectively ensuring the single pipe conveying after the pipe is discharged in cooperation with the limiting mechanism and the width-limiting component, improving the efficiency of pipe cutting, especially for the processing of thin pipes, to achieve stable and efficient feeding.

[0063] Among them, the matching position of the height of the height-limited three-axis can refer to the height difference between the height-limited three-axis cylinder and the optical axis slide rail. Specifically, the reasonable height difference between the height-limited three-axis cylinder and the optical axis slide rail is determined according to the actual size of the pipe. This height difference can enable the height-limited three-axis cylinder to accurately push out the pipes on the second layer in height, and ensure that the pipes on the bottom layer are not pushed out by mistake, so as to achieve that there is only one pipe to be transported in the screening area.

[0064] In addition, in order to realize automatic detection and feeding, a signal detection mechanism 307 is installed on the inner side of the optical axis slide rail near the discharge port. Figure 3-4 As shown, it includes a material level sensing swing arm 307-1 and a proximity switch 307-2. The material level sensing swing arm 307-1 is close to the discharge port. When the pipe is discharged to the optical axis slide rail, it will touch the material level sensing swing arm to make it rotate. The proximity switch adopts a photoelectric proximity sensing switch and is connected to the electric control cabinet. When the pipe is in place, the pipe will touch the material level sensing swing arm inside the detection mechanism. When the swing arm swings, it will trigger the proximity switch to send a signal, indicating that the pipe is in place. Then the control system will command the reel motor to release the material belt and end the material surge action.

[0065] In this embodiment, the material warehouse 1, the screening and feeding mechanism 3, the limiting mechanism 2 and the proximity switch 307-2 are all connected to the electric control cabinet 7 to realize automatic feeding of pipes.

[0066] In this embodiment, the feeding robot 4 uses a synchronous belt 401 and a synchronous pulley 402 for feeding. In order to better receive the pipes transmitted from the smooth guide rail, the feeding robot part is provided with a longitudinal block to block the pipes. After limiting the position of the pipes, they are transmitted to the chuck for cutting. This part can be implemented using the existing structure.

[0067] The working principle of this embodiment is:

[0068] In general, if Figure 1 As shown, the feeding device adopts a modular approach, and users can perform modular deletions and corresponding combinations according to actual needs.

[0069] The traditional feeding structure has the following defects: First, the material warehouse is not capable of automatically identifying whether the pipes have been discharged normally, and there is no limit mechanism; Second, in the subsequent transmission process, it does not have the function of selecting pipes, that is, the transmission process blindly sends as many pipes as the material warehouse outputs at one time, without limiting or selecting pipes. Every time the user encounters pipe congestion and material jam, it is necessary to manually put the excess pipes on the feeder back into the material warehouse, and to sort out the failure of pipes in the correct position that have not been in place due to congestion and jam.

[0070] In order to effectively control the disorderly rushing out of the pipes under the working condition that the material belt is gradually tightened and straightened, the present embodiment designs the pipes to pass through in sequence, and accordingly designs the following logical actions:

[0071] Combination Figure 2-4 When working, unpack the bundled pipes and place them on the material belt of the material warehouse. Lift the tail end of the height-limiting rocker arm by adjusting the screw to adjust the opening height of the head of the height-limiting rocker arm. The height-limiting rocker arm can be fully opened to facilitate material feeding. Its center can rotate around the copper sleeve rotation axis. Similarly, the height-limiting rocker arm can also be fully buckled. The height-limiting rocker arm is in a cantilever state. It relies on the gravity of the head and the adjusting screw at the tail to work. Its state is constant and the opening height is steady.

[0072] Driven by the reel motor, the material belt reel rotates slowly, gradually tightening and straightening the material belt, and the pipe is lifted up and flows out of the material warehouse. Due to the existence of the height-limiting rocker arm, the pipe can only flow out from the discharge port at a specific height. The height of the discharge port is adjusted to be slightly larger than the height of the pipe, which can greatly limit the discharge quantity, so that the pipe can only flow out in one layer and in a tight state.

[0073] The first pipe that comes out will be immediately absorbed by the space in the screening area, which is the area between the screening Z-axis slide and the discharge port. A signal detection mechanism is installed on the inner side of the screening installation base near the discharge port. After the signal detection mechanism detects the material, it immediately feeds back to the system, and the electric control cabinet controls the reel motor to reverse, the material belt is released, begins to relax, and the pipe begins to fall. At this time, no more pipes will flow out of the opening. After the material belt is released to the set length, the motor stops working. At this time, the discharge work of the material warehouse completes a cycle.

[0074] In order to ensure that the first emerging pipe is immediately absorbed by the matching space reserved in the screening area, and a signal is triggered to prompt, so that the qualified pipes can slide down the optical axis slide rail to the feeding robot, and the feeding robot then sends the pipe to the chuck to complete the entire feeding action, this embodiment designs the following structure and logic action:

[0075] like Figure 2-4As shown, after the bundled pipes are unpacked and placed in the material warehouse, the trapezoidal self-locking screw is adjusted, and the screw nut seat that cooperates with the trapezoidal self-locking screw is used to push the screening cylinder slide plate, thereby driving the screening Z-axis slide plate to move forward and backward. The different width values ​​of the screening area can be adjusted, and this width value can screen the material width, so as to achieve the effect that there is only one pipe in the width direction.

[0076] In the process of adjusting the up and down movement of the screening Z-axis slide, limit blocks are set at the highest and lowest positions of the mounting base. In the screening state of the pipe, the entire height-limited three-axis cylinder and the screening Z-axis slide are fully raised to the matching height to block the pipe; after the screening is completed, in the pipe sliding state, the entire height-limited three-axis cylinder and the screening Z-axis slide are all lowered to the lowest point under the optical axis slide rail, thereby losing the blocking effect on the pipe, making it easier for the pipe to slide smoothly along the optical axis slide rail into the feeding robot, thus completing a cycle of the screening work.

[0077] In this embodiment, the above screening and feeding mechanism can be assembled onto the screening installation base in a single group, and finally the whole assembly can be assembled onto the feeding device, which is convenient for production management and mass production.

[0078] The present invention adds a limiting mechanism to the material warehouse, which can effectively control the disorderly outflow of pipes under the working condition that the material belt is gradually tightened and straightened, and the pipes can only queue up and pass through in sequence. A screening and feeding mechanism is added to the transmission process, which can reserve a matching space in the screening part according to the height and width of the pipe through the action of the cylinder, allowing one piece to pass through in sequence, and finally, the qualified pipes that have been screened slide down into the feeding robot, and the unloading robot sends the pipe to the chuck to complete the entire automatic feeding action. Therefore, this embodiment has the screening function of limiting the discharge and limiting the height and width, which solves the problem of repeated manual intervention to adjust the feeder to cause excessive discharge or jamming, and effectively improves production efficiency.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Those skilled in the art should understand that the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic feeding device for a laser tube cutting machine with a material storage, characterized in that: It includes a material warehouse, a limiting mechanism, a screening and feeding mechanism and a feeding manipulator. The material warehouse includes a material belt for placing pipes. The limiting mechanism is arranged at the discharge port of the material warehouse for single-layer discharge of pipes. The screening and feeding mechanism is installed at one side of the discharge port. The screening and feeding mechanism includes a width limiting component. A screening area is formed between one end of the width limiting component and the discharge port, and the width of the screening area can be adjusted. The feeding manipulator is installed at the end of the screening and feeding mechanism. The pipe flows out of the discharge port through the limiting mechanism and slides down through the screening and feeding mechanism into the feeding manipulator. The limiting mechanism includes a height limiting rocker arm and an adjusting screw. The height limiting rocker arm is installed above the material storage and extends to the discharge port. The height limiting rocker arm is hingedly connected to the material storage and is used to adjust the opening height of the discharge port. The adjusting screw is installed at the tail end of the height limiting rocker arm.

2. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 1, characterized in that: The material warehouse also includes a support frame, a material belt support wheel, a material belt reel and a reel motor. The material belt is arranged in the support frame for storing pipes; the material belt support wheel is installed on the support frame and is arranged at the discharge port, one end of the material belt extends from the material belt support wheel and is wound around the material belt reel, and the material belt reel is driven by the reel motor to release or tighten the material belt.

3. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 2, characterized in that: The height-limiting rocker arm is slidably connected to the support frame via a copper sleeve rotating shaft, and the height difference between the head end of the height-limiting rocker arm and the material belt supporting wheel changes as the height-limiting rocker arm rotates.

4. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 1, characterized in that: The screening and feeding mechanism comprises an inclined feeding bracket and an optical axis slide rail. The optical axis slide rail is obliquely arranged on the top surface of the inclined feeding bracket and is used to transport the pipe from the discharge port to the feeding robot.

5. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 4, characterized in that: The screening and feeding mechanism also includes a screening mounting base installed on the outside of the optical axis slide rail, and the width limiting component is installed on the side of the screening mounting base away from the optical axis slide rail; the width limiting component includes a screening cylinder slide and a screw nut mechanism, the screening cylinder slide is slidingly connected to the screening mounting base along a first direction, and the screw nut mechanism drives the screening cylinder slide to move relative to the screening mounting base, so as to adjust the width of the screening area.

6. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 5, characterized in that: The screw nut mechanism includes a trapezoidal self-locking screw, a screw nut seat and a screw moving seat; the trapezoidal self-locking screw cooperates with the screw nut seat, the screw moving seat is fixed to the end of the trapezoidal self-locking screw and is fixedly connected to the screening cylinder slide; the other end of the trapezoidal self-locking screw is installed with a width adjustment handle.

7. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 5, characterized in that: The screening and feeding mechanism also includes a lifting and adjusting component, which is slidably connected to the width limiting component; the lifting and adjusting component includes a lifting cylinder and a screening Z-axis slide, which is slidably connected to the screening cylinder slide along the second direction, the top of the telescopic rod of the lifting cylinder is connected to the screening Z-axis slide, and the lower part of the lifting cylinder is connected to the screening cylinder slide.

8. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 7, characterized in that: A limited height three-axis cylinder is installed on the top of the screening Z-axis slide plate, close to the side of the optical axis slide rail.

9. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 8, characterized in that: The screening rack slide plate is slidably connected to the screening mounting base, and drives the height-limiting three-axis cylinder to rise and fall through the lifting and lowering adjustment component.

10. The automatic feeding device of a laser tube cutting machine with a material storage as claimed in claim 4, characterized in that: A signal detection mechanism is installed on the inner side of the optical axis slide rail. The signal detection mechanism includes a proximity switch and a material level sensing swing arm. The material level sensing swing arm is close to the discharge port, and the proximity switch adopts a photoelectric proximity sensing switch.

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