Automatic replacement device for cutting torch on cutting head

Abstract

The automatic replacing device comprises an automatic replacing mechanism and a connector, the automatic replacing mechanism comprises a base, a plurality of rotating shafts are installed on the top face of the base, each rotating shaft is rotationally connected with the base, a transmission wheel is fixedly installed on each rotating shaft, a sliding cavity is formed in the top face of each rotating shaft in the axial direction, and a sliding rod is installed in each sliding cavity; the top of the sliding rod is provided with a storage position matched with the connector, the side wall of the sliding rod is provided with a guide groove formed in the axial direction, the rotating shaft is provided with a limiting screw inserted into the guide groove in the radial direction, and a reset spring is arranged in the sliding cavity and located at the bottom of the sliding rod. A driving motor is mounted on the base, a driving wheel is mounted at the output end of the driving motor, and the driving wheel is in transmission connection with all the transmission wheels through a synchronous belt; an external thread head connected with the cutting head is arranged at the upper end of the connector, a connecting part matched with the storage position is arranged at the lower end of the connector, and an internal thread hole connected with the cutting nozzle is formed in the center of the connecting part; according to the utility model, the cutting torch can be automatically replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting machines, in particular to an automatic replacement device for a cutting nozzle on a cutting head. Background Art

[0002] Laser cutting is a processing method that uses lasers instead of mechanical tools. It has the advantages of fast processing speed and high precision. Different cutting processes are required to cut plates of different materials, and a specified type of cutting nozzle needs to be installed to ensure the cutting quality. The cutting nozzle is generally installed directly below the cutting head using a threaded method. It can be installed or removed by rotating it by hand or with a tool. Due to the different strength and experience of different operators, the tightness of the installed cutting nozzle will be different. If it is installed too loosely, the cutting nozzle will fall off during the cutting process, resulting in cutting failure, and more seriously, damage to the cutting head. If it is installed too tightly, it will cause inconvenience during removal.

[0003] In addition, when the machine tool runs the cutting task list, after a task is completed, the operator needs to pause the machine tool and manually change the correct cutting nozzle before continuing the next task. This consumes a lot of time.

[0004] Therefore, it is necessary to design a device for automatically replacing the cutting nozzle, which can automatically unload and store the cutting nozzle on the cutting head, and can automatically install the stored cutting nozzle on the cutting head. Summary of the invention

[0005] The purpose of the utility model is to solve the problems existing in the prior art and to provide an automatic replacement device for a cutting nozzle on a cutting head.

[0006] The specific scheme of the utility model is: an automatic replacement device for a cutting nozzle on a cutting head, comprising an automatic replacement mechanism and a connecting head. The automatic replacement mechanism comprises a base, a top surface of the base is provided with a plurality of rotating shafts, each rotating shaft is rotatably connected to the base, and a transmission wheel is fixedly installed on each rotating shaft, a sliding cavity is axially provided on the top surface of the rotating shaft, a sliding rod is installed in the sliding cavity, a storage position matching the connecting head is provided on the top of the sliding rod, a guide groove arranged along the axial direction is provided on the side wall of the sliding rod, a limit screw is radially inserted into the guide groove on the rotating shaft, and a return spring is installed at the bottom of the sliding rod in the sliding cavity; a driving motor is installed on the base, a driving wheel is installed at the output end of the driving motor, and the driving wheel and all the driving wheels are connected by synchronous belt transmission; the upper end of the connecting head is provided with an external threaded head connected to the cutting head, and the lower end is provided with a connecting part matched with the storage position, the outer edge of the connecting part is evenly provided with a plurality of protrusions, the storage position is provided with a groove corresponding to the protrusion, and the center of the connecting part is provided with an internal threaded hole connected to the cutting nozzle.

[0007] Furthermore, the driving motor is equipped with a Hall sensor, which is used to detect the motor speed and current. The Hall sensor is connected to the motor drive module signal, and the drive module is connected to the machine tool main control system signal.

[0008] Furthermore, a cavity for accommodating a cutting nozzle is provided at the bottom end of the storage position, and the groove is arranged on the inner side wall of the storage position.

[0009] Furthermore, a ring plate is provided in the middle of the outer wall surface of the connector, and a plurality of ventilation holes are evenly distributed on the ring plate.

[0010] Furthermore, two reversing wheels are mounted on the base, the reversing wheels are rotationally connected to the base, and the synchronous belt passes around the reversing wheels to achieve reversal.

[0011] Furthermore, the base is provided with a waist-shaped hole, an adjustment seat is installed at the waist-shaped hole, a locking bolt is installed in the waist-shaped hole, the adjustment seat is connected and fixed to the base through the locking bolt, and the drive motor and the drive wheel are both installed on the adjustment seat.

[0012] Furthermore, the plurality of rotating shafts are arranged in a row and are equidistantly disposed, and the coordinate position of each storage location is recorded in the main control system of the machine tool.

[0013] Compared with the prior art, the utility model has the following advantages: 1. It can quickly and automatically replace the cutting nozzle on the cutting head, reducing the time for replacing the cutting nozzle between different tasks; 2. It can store commonly used cutting nozzles, reducing the risk of losing the cutting nozzle to a certain extent; 3. The main control system manages the cutting nozzle models in the warehouse and the cutting nozzle models on the cutting head, reducing the possibility of errors in the installed cutting nozzle models; 4. When installing the cutting nozzle, the current detection standard is consistent, ensuring that the cutting head is installed in place, greatly reducing the possibility of the cutting nozzle falling off during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional view of the automatic replacement mechanism of the utility model;

[0015] Figure 2 yes Figure 1 A top view of

[0016] Figure 3 yes Figure 2 AA view;

[0017] Figure 4 yes Figure 3 BB view;

[0018] Figure 5 It is a three-dimensional view of the connector of the utility model;

[0019] Figure 6 This is a stereoscopic view of the connector of the utility model from another perspective;

[0020] Figure 7 It is a cross-sectional view of the connector of the utility model;

[0021] In the figure: 1. base; 2. adjustment seat; 3. drive motor; 4. synchronous belt; 5. reversing wheel; 6. connector; 61. ring plate; 62. vent; 63. external thread head; 64. internal thread hole; 65. connecting part; 66. protrusion; 7. storage position; 71. groove; 8. drive wheel; 9. slide rod; 91. guide groove; 10. reset spring; 11. limit screw; 12. waist-shaped hole; 13. transmission wheel. DETAILED DESCRIPTION

[0022] See also Figure 1-4 , the present embodiment is used for the automatic replacement device of the cutting nozzle on the cutting head, including an automatic replacement mechanism and a connector 6, the automatic replacement mechanism includes a base 1, a plurality of rotating shafts are installed on the top surface of the base 1, each rotating shaft is rotatably connected with the base 1, a transmission wheel 13 is fixedly installed on each rotating shaft, a sliding cavity is axially provided on the top surface of the rotating shaft, a slide bar 9 is installed in the sliding cavity, a storage position 7 matching the connector 6 is provided on the top of the slide bar 9, a guide groove 91 arranged along the axial direction is provided on the side wall of the slide bar 9, a limit screw 11 inserted into the guide groove 91 in the radial direction is installed on the rotating shaft, when the rotating shaft rotates, the slide bar 9 is driven to rotate by the limit screw 11, and then the storage position 7 is driven to rotate, and a reset spring 10 is installed at the bottom of the slide bar 9 in the sliding cavity; a driving motor 3 is installed on the base 1, and a driving wheel 8 is installed at the output end of the driving motor 3, and the driving wheel 8 and all the transmission wheels 13 are connected through a synchronous belt 4 for transmission; see Figure 5-7 The upper end of the connecting head 6 is provided with an external threaded head 63 connected to the cutting head, and the lower end is provided with a connecting part 65 that cooperates with the storage position 7. Six protrusions 66 are evenly arranged on the outer edge of the connecting part 65. The storage position 7 is provided with grooves 71 corresponding to the protrusions 66. The center of the connecting part 65 is provided with an internal threaded hole 64 connected to the cutting nozzle.

[0023] The utility model provides a slide bar 9 and a return spring 10, so that the slide bar 9 and the storage position 7 can be extended and retracted within a certain range while the rotating shaft drives the slide bar 9 and the storage position 7 to rotate. Therefore, when installing or unloading the cutting nozzle, the cutting head has a certain flexibility when pressing down the storage position 7, avoiding collision damage to the equipment caused by hard contact.

[0024] The transmission wheel 13 and the driving wheel 8 of the utility model are both pulleys, and the synchronous belt 4 is a belt. Teeth are arranged on both sides of the belt, and the belt passes around each transmission wheel 13 in sequence in an S shape.

[0025] Furthermore, the driving motor 3 is equipped with a Hall sensor, which is used to detect the motor speed and current. The Hall sensor is connected to the motor drive module signal, and the drive module is connected to the machine tool main control system signal.

[0026] Furthermore, a cavity for accommodating a cutting nozzle is provided at the bottom end of the storage position 7 , and the groove 71 is provided on the inner side wall of the storage position 7 .

[0027] Furthermore, a ring plate 61 is provided in the middle of the outer wall surface of the connecting head 6, and a plurality of ventilation holes 62 are evenly distributed on the ring plate 61, and the outer diameter of the ring plate 61 is larger than the storage; when the connecting head 6 carrying the cutting nozzle is stored in the storage position 7, the ring plate 61 is located on the top surface of the storage position 7 to play a supporting role, and at the same time, the protrusions 66 of the connecting part 65 at the lower end are inserted into the groove 71 of the storage position 7, and the cutting nozzle in the center of the connecting part 65 is located in the cavity.

[0028] Furthermore, two reversing wheels 5 are mounted on the base 1 , and the reversing wheels 5 are rotationally connected to the base 1 , and the synchronous belt 4 passes around the reversing wheels 5 to achieve reversal.

[0029] Furthermore, a waist-shaped hole 12 is provided on the base 1, an adjustment seat 2 is installed at the waist-shaped hole 12, a locking bolt is installed in the waist-shaped hole 12, the adjustment seat 2 is connected and fixed to the base 1 by the locking bolt, the driving motor 3 and the driving wheel 8 are both installed on the adjustment seat 2, and the synchronous belt 4 is tightened or loosened by moving the adjustment seat 2 in the waist-shaped hole 12.

[0030] Furthermore, the plurality of rotating shafts are arranged in a row and are equidistantly disposed, and the coordinate position of each storage location 7 is recorded in the main control system of the machine tool.

[0031] The working principle of the utility model is as follows: all cutting nozzles are installed and docked with the cutting head through the connecting head 6, the cutting nozzle is installed at the internal threaded hole 64 at the lower end of the connecting head 6, and the external threaded head 63 at the upper end of the connecting head 6 is installed in the cutting head; before the CNC laser cutting machine runs the processing program, it will compare whether the cutting nozzle model specified by the process parameters and the cutting nozzle model installed on the cutting head are consistent. If they are consistent, the machine tool continues to run the processing program; if they are inconsistent, the cutting nozzle replacement operation is performed.

[0032] First, the numerical control system controls the movement of the cutting head, and puts the cutting nozzle and the connector 6 into an empty storage location 7; then the main control system controls the driving motor 3 to rotate in the correct direction according to the storage location 7, and the driving wheel 8 on the driving motor 3 rotates to drive the synchronous belt 4 to move, and the synchronous belt 4 drives the pulleys under each storage location 7 to rotate, and the storage location 7 rotates with the pulley, and the storage location 7 drives the connector 6 to rotate through the groove 71. After the connector 6 rotates several times, it is unloaded from the cutting head, and the unloaded connector 6 and the cutting nozzle are stored in the current storage location 7.

[0033] Then, the main control system finds the storage location 7 where the cutting nozzle of the specified model is located based on the saved data records, controls the cutting head to move to the top of the corresponding storage location 7, and then controls the cutting head to descend and press the upper part of the connector 6, so that the external thread of the connector 6 and the internal thread of the cutting head are in contact. The main control system then controls the drive motor 3 to rotate in the correct direction, and the storage location 7 drives the connector 6 to rotate. After several rotations, the connector 6 and the cutting nozzle are installed on the cutting head.

[0034] After the cutting nozzle is installed, the main control system updates the cutting nozzle model on the cutting head, and also updates the cutting nozzle model in the storage location 7 involved in the exchange process.

[0035] During the process of unloading the cutting nozzle, the main control system monitors the current and speed of the drive motor 3 in real time through the Hall sensor. If the current exceeds the alarm value or the speed is lower than the alarm value, the replacement process will be stopped and a corresponding alarm will be given on the machine tool screen, indicating that the unloading of the cutting nozzle has failed.

[0036] When loading the cutting nozzle, the main control system first controls the drive motor 3 to rotate at a high speed for 3 circles, and then controls the motor to continue rotating at a low speed. At low speed, the main control system monitors the motor speed and current. If the motor speed drops to the set value, it is considered that the cutting nozzle is installed successfully; if the motor speed is detected to drop to the alarm value during the high speed stage of the motor, it is considered that the loading of the cutting nozzle has failed; if the motor speed is not detected to drop below the specified value within the specified time during the low speed stage of the motor, it is considered that the loading of the cutting nozzle has failed.

[0037] After the above work is completed, the main control system controls the cutting head to move again to the plate to be cut and continue the cutting work.

Claims

1. An automatic replacement device for cutting nozzles on a cutting head, characterized by: It comprises an automatic replacement mechanism and a connector, wherein the automatic replacement mechanism comprises a base, a plurality of rotating shafts are mounted on the top surface of the base, each rotating shaft is rotatably connected to the base, a transmission wheel is fixedly mounted on each rotating shaft, a sliding cavity is axially arranged on the top surface of the rotating shaft, a sliding rod is mounted in the sliding cavity, a storage position matching the connector is arranged on the top of the sliding rod, a guide groove arranged along the axial direction is arranged on the side wall of the sliding rod, a limit screw inserted into the guide groove along the radial direction is mounted on the rotating shaft, and a reset spring is mounted at the bottom of the sliding rod in the sliding cavity; a driving motor is mounted on the base, a driving wheel is mounted on the output end of the driving motor, and the driving wheel is connected to all the transmission wheels through a synchronous belt transmission; The upper end of the connecting head is provided with an external threaded head connected to the cutting head, and the lower end is provided with a connecting part that cooperates with the storage position. The outer edge of the connecting part is evenly provided with a plurality of protrusions, and the storage position is provided with grooves corresponding to the protrusions. The center of the connecting part is provided with an internal threaded hole connected to the cutting nozzle.

2. The automatic replacement device for the cutting nozzle on the cutting head according to claim 1 is characterized in that: The driving motor is equipped with a Hall sensor, which is used to detect the motor speed and current. The Hall sensor is connected to the motor drive module signal, and the drive module is connected to the machine tool main control system signal.

3. The automatic replacement device for the cutting nozzle on the cutting head according to claim 1 is characterized in that: A cavity for accommodating a cutting nozzle is provided at the bottom end of the storage position, and the groove is arranged on the inner side wall of the storage position.

4. The automatic replacement device for the cutting nozzle on the cutting head according to claim 1 is characterized in that: A ring plate is arranged in the middle of the outer wall surface of the connector, and a plurality of vent holes are evenly distributed on the ring plate.

5. The automatic replacement device for the cutting nozzle on the cutting head according to claim 1 is characterized in that: Two reversing wheels are arranged on the base, the reversing wheels are rotatably connected with the base, and the synchronous belt passes around the reversing wheels to realize reversal.

6. The automatic replacement device for the cutting nozzle on the cutting head according to claim 1 is characterized in that: The base is provided with a waist-shaped hole, an adjustment seat is installed at the waist-shaped hole, a locking bolt is installed in the waist-shaped hole, the adjustment seat is connected and fixed to the base through the locking bolt, and the driving motor and the driving wheel are both installed on the adjustment seat.

7. The automatic replacement device for the cutting nozzle on the cutting head according to claim 1 is characterized in that: The plurality of rotating shafts are arranged in a row and are set at equal distances, and the coordinate position of each storage location is recorded in the main control system of the machine tool.

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