Automatic welding machine for spiral drum of coal mining machine

Abstract

The present invention belongs to the technical field of automatic welding machines, and in particular relates to an automatic welding machine for a spiral drum of a coal mining machine, comprising a mounting frame, an operating panel and a PLC controller arranged on the lower side wall of the mounting frame, and a connecting frame fixedly connected to the upper side wall of the mounting frame. The present invention can stably clamp the spiral blade during the welding process when welding the spiral blade to the drum surface, so that the spiral blade always remains at a set position and angle, and automatically adjust the power and welding speed of the welding machine according to the direction of deformation of the spiral blade, thereby ensuring the welding quality of the spiral blade, and can automatically detect the gravity distribution of the drum. When the detection finds that the gravity distribution of the drum has changed due to welding, the operator can be promptly reminded to perform counterweight leveling on the drum, thereby ensuring the subsequent cutting efficiency and working stability of the spiral drum.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic welding machines, and in particular relates to an automatic welding machine for a spiral drum of a coal mining machine. Background Art

[0002] The shearer drum is a key component of coal mining operations and is responsible for important tasks such as cutting and loading coal. The shearer drum consists of a drum, spiral blades, picks and end plates. During the manufacturing process of the drum, the spiral blades and end plates need to be welded to the surface of the drum, and then multiple picks are installed on the surface of the spiral blades. For example, in patent publication number CN205085525U, an automatic welding machine for the spiral drum of a coal mining machine is proposed, which improves the welding quality and production efficiency of the spiral drum, reduces the work intensity and danger of workers, is safe, economical and practical, and promotes the development of the entire coal machinery equipment industry.

[0003] When welding the drum, the automatic welding machine usually welds each component at a constant welding power and moving speed. However, since the weld seam of the spiral blade is long and is placed in a spiral inclination with the drum (such as Figure 1 As shown in the figure, once the power of the welding machine is improperly set, the spiral blades will easily bend and deform due to thermal expansion, affecting the welding quality. In addition, after welding, the roller may have uneven gravity distribution on the roller surface due to uneven weld quality and unreasonable distribution of spiral blades, which will affect the subsequent cutting efficiency of the spiral roller and the stability of the mechanical structure.

[0004] Therefore, an automatic welding machine for the spiral drum of a coal mining machine is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic welding machine for the spiral drum of a coal mining machine in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solution: an automatic welding machine for a spiral drum of a coal mining machine, comprising a mounting frame, an operating panel and a PLC controller arranged on the lower side wall of the mounting frame, the upper side wall of the mounting frame being fixedly connected to a connecting frame, and further comprising:

[0007] A rotating column is rotatably arranged on the upper side wall of the mounting frame, the upper side wall of the mounting frame is fixedly connected to a drive motor, the drive motor is connected to the rotating column through a bevel gear transmission assembly, the upper end of the rotating column is fixedly connected to a frustum, and the surface of the frustum is connected to a uniformity detection assembly and a marking assembly;

[0008] A first electric push rod is arranged in the rotating column and the circular table, wherein the movable end of the first electric push rod is fixedly connected to a support base, a plurality of second electric push rods are fixedly connected to the side wall of the support base, and the movable end of the second electric push rod is fixedly connected to a centering plate via a sensing component, and two rollers are fixedly connected to the side wall of the centering plate;

[0009] a third electric push rod fixedly connected to the side wall of the connecting frame, wherein a movable end of the third electric push rod is fixedly connected to a circular plate, and a lower side wall of the circular plate is connected to an automatic welding assembly;

[0010] Three clamping assemblies are evenly distributed on the lower side wall of the circular plate and are used for clamping and fixing the spiral blades.

[0011] Preferably, the automatic welding assembly includes a circular guide rail and a sliding block, the circular guide rail is fixedly connected to the lower side wall of the circular plate, the sliding block is slidably arranged in the circular guide rail, the lower side wall of the sliding block is fixedly connected to a bent plate, the lower end of the bent plate extends out of the circular guide rail and is fixedly connected to a linear motor, the side wall of the bent plate is fixedly connected to a moving motor, the moving motor is connected to the circular guide rail through an annular gear plate transmission assembly, the moving end of the linear motor is fixedly connected to a lifting plate, the upper side wall of the lifting plate is fixedly connected to a welding machine, and the lower side wall of the lifting plate is fixedly connected to a welding head through a robotic arm.

[0012] Preferably, the clamping assembly includes a vertical plate and a horizontal electric push rod, the vertical plate and the lower side wall of the circular plate are fixedly connected, the horizontal electric push rod and the side wall of the vertical plate are fixedly connected, the movable end of the horizontal electric push rod is fixedly connected to the clamping frame, the upper and lower side walls of the clamping frame are fixedly connected to the clamping electric push rod, the movable end of the clamping electric push rod passes through the clamping frame and is fixedly connected to a clamping plate that fits together with the spiral blade, the side wall of the clamping plate located on the lower side is inlaid with a pressure sensing plate, and the pressure sensing plate is electrically connected to the PLC controller through a pressure sensor.

[0013] Preferably, the uniformity detection component includes a fixed ring and a plurality of small electric push rods, the fixed ring is fixedly connected to the upper side wall of the frustum, the plurality of small electric push rods are evenly distributed on the outer wall of the fixed ring, the movable end of the small electric push rod is fixedly connected to an induction switch, the induction switch is electrically connected to the marking component through a PLC controller, and the upper side wall of the frustum is fixedly connected to a plurality of ball bearings.

[0014] Preferably, the marking assembly includes a ring plate and a paint box, the ring plate is fixedly sleeved on the outer wall of the rotating column, the paint box is fixedly connected to the upper side wall of the ring plate, the upper side wall of the paint box is fixedly connected to a pump, the induction switch is electrically connected to the pump through a PLC controller, the feed end of the pump is located in the paint box, the upper side wall of the table is provided with an annular groove, and an annular tube is placed in the annular groove, the discharge end of the pump passes through the table and is connected to the annular tube, the upper side wall of the annular tube is fixedly connected with a plurality of spray pipes arranged inwardly, a control valve is provided in the spray pipe, the induction switch is electrically connected to the opposite control valve through the PLC controller, and the upper end of the spray pipe is connected to a nozzle.

[0015] Preferably, the induction component includes a transverse cylinder and a movable seat, the transverse cylinder is fixedly connected to the movable end of the second electric push rod, the movable seat is fixedly connected to the inner wall of the transverse cylinder by a spring, the movable seat is fixedly connected to a transverse rod away from the side wall of the second electric push rod, the end of the cross rod away from the movable seat extends out of the transverse cylinder and is fixedly connected to a fixed frame, the inner wall of the fixed frame is rotatably connected to a rotating pin, one end of the rotating pin extending out of the fixed frame is fixedly connected to the centering plate, the inner wall of the fixed frame is fixedly connected to two placing plates, the same spring is fixedly connected between the placing plate and the rotating pin, the end of the rotating pin away from the centering plate is fixedly connected to a conductive rod, the conductive rod is electrically connected to an external power supply, the inner wall of the fixed frame is fixedly connected to an arc seat, the inner wall of the arc seat is fixedly connected to two arc resistor plates, the ends of the two arc resistor plates away from each other are electrically connected to the PLC controller, the lower side wall of the mounting frame is fixedly connected to a lamp board, the front side wall of the lamp board is fixedly connected to multiple rows of lamp beads, and the arc resistor plate is electrically connected to the lamp beads through the PLC controller.

[0016] Preferably, an annular storage groove is opened on the upper side wall of the cone, a magnetic induction heating coil is placed in the annular storage groove, a vertical electric push rod is fixedly connected to the upper side wall of the ring plate, and the moving end of the vertical electric push rod passes through the annular storage groove and is fixedly connected to the magnetic induction heating coil.

[0017] Preferably, the upper side wall of the horizontal cylinder is fixedly connected to the limiting frame, the side wall of the limiting frame is fixedly connected to the limiting electric push rod, the movable end of the limiting electric push rod is fixedly connected to the limiting pin, the upper side wall of the horizontal cylinder is provided with a vertical hole that matches the limiting pin, and the upper side wall of the movable seat is provided with a limiting groove that matches the limiting pin.

[0018] Compared with the existing technology, the advantages of an automatic welding machine for the spiral drum of a coal mining machine are:

[0019] 1. Through the automatic welding assembly and clamping assembly, when the spiral blade is welded to the drum surface, the spiral blade can be stably clamped during the welding process, so that the spiral blade is always kept in the set position and angle, and the power and welding speed of the welding machine are automatically adjusted according to the deformation direction of the spiral blade, thereby ensuring the welding quality of the spiral blade.

[0020] 2. Through the set uniformity detection component and marking component, when the automatic welding machine welds the spiral blades to the surface of the drum, it can automatically detect the gravity distribution of the drum. When the detection finds that the gravity distribution of the drum has changed due to welding, it can promptly remind the operator to perform counterweight leveling on the drum, thereby ensuring the subsequent cutting efficiency and working stability of the spiral drum.

[0021] 3. Through the provision of the first electric push rod, support seat, second electric push rod, centering plate and induction component, when the drum is placed on the welding station, the placement position of the drum can be automatically adjusted so that the spiral blades and the drum surface are in contact at the correct position. In addition, the inner wall of the drum can be inspected after the drum welding is completed. When the inner wall of the drum changes due to welding stress, the change of the inner wall can be fed back to the operator in time, which is convenient for the operator to repair the drum later. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a drum in an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of a spiral blade in an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0024] Figure 3 This is a structural schematic diagram of an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0025] Figure 4 This is a structural schematic diagram of an automatic welding assembly in an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0026] Figure 5 This is a structural schematic diagram of a marking assembly in an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0027] Figure 6 This invention provides an automatic welding machine for the spiral drum of a coal mining machine. Figure 5 A magnified schematic diagram of part A;

[0028] Figure 7 This is a schematic diagram of the surface structure of a centering plate in an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0029] Figure 8 This invention provides an automatic welding machine for the spiral drum of a coal mining machine. Figure 7 An enlarged schematic diagram of part B;

[0030] Figure 9 This is a structural schematic diagram of a clamping assembly in an automatic welding machine for a spiral drum of a coal mining machine provided by the present invention;

[0031] Figure 10 The present invention provides a schematic diagram of the surface structure of a ring pipe in a spiral drum automatic welding machine for a coal mining machine.

[0032] In the figure: 1 mounting frame, 2 operation panel, 3 PLC controller, 4 connecting frame, 5 rotating column, 6 driving motor, 7 round table, 8 first electric push rod, 9 support seat, 10 second electric push rod, 11 centering plate, 12 roller, 13 third electric push rod, 14 round plate, 15 spiral blade, 16 automatic welding assembly, 161 circular guide rail, 162 sliding block, 17 bending plate, 18 linear motor, 19 moving motor, 20 lifting plate, 21 welding machine, 22 robotic arm, 23 welding head, 24 clamping assembly, 241 vertical plate, 242 horizontal electric push rod, 25 clamping frame, 26 clamping electric push rod, 27 clamping plate, 28 pressure sensing plate, 29 uniformity detection component, 291 fixed ring, 292 small electric push rod, 30 induction switch, 31 marking component, 311 ring plate, 312 paint box, 32 pump, 33 annular groove, 34 ring pipe, 35 spray pipe, 36 control valve, 37 nozzle, 38 induction component, 381 horizontal cylinder, 382 moving seat, 39 horizontal bar, 40 fixed frame, 41 rotating pin, 42 placement plate, 43 conductive rod, 44 arc seat, 45 arc resistor plate, 46 lamp board, 47 lamp beads, 48 ​​annular storage groove, 49 magnetic induction heating coil, 50 vertical electric push rod, 51 limit frame, 52 limit electric push rod, 53 limit pin, 54 ball bearing. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figures 1-10 As shown, an automatic welding machine for a spiral drum of a coal mining machine includes a mounting frame 1 and an operation panel 2 and a PLC controller 3 arranged on the lower side wall of the mounting frame 1. The upper side wall of the mounting frame 1 is fixedly connected to a connecting frame 4, and further includes:

[0035] The rotating column 5 is rotatably arranged on the upper side wall of the mounting frame 1. The upper side wall of the mounting frame 1 is fixedly connected to a driving motor 6. The driving motor 6 is connected to the rotating column 5 through a bevel gear transmission assembly. The upper end of the rotating column 5 is fixedly connected to a frustum 7. The surface of the frustum 7 is connected to a uniformity detection assembly 29 and a marking assembly 31. The uniformity detection assembly 29 includes a fixed ring 291 and a plurality of small electric push rods 292. The fixed ring 291 is fixedly connected to the upper side wall of the frustum 7. The plurality of small electric push rods 292 are evenly distributed on the outer wall of the fixed ring 291. The moving end of the small electric push rod 292 is fixedly connected to an induction switch 30. The induction switch 30 is electrically connected to the marking assembly 31 through a PLC controller 3. A plurality of balls 54 are fixedly connected to the upper side wall of the frustum 7. The marking assembly 31 includes a ring plate 311 and a paint box 312. The ring plate 311 is fixedly sleeved on the outer wall of the rotating column 5. The paint box 312 is fixedly connected to the upper side wall of the ring plate 311. The upper side wall of 12 is fixedly connected to a pump 32, and the induction switch 30 is electrically connected to the pump 32 through the PLC controller 3, the feed end of the pump 32 is located in the paint box 312, and the upper side wall of the frustum 7 is provided with an annular groove 33, and an annular tube 34 is placed in the annular groove 33, the discharge end of the pump 32 passes through the frustum 7 and is connected to the annular tube 34, and the upper side wall of the annular tube 34 is fixedly connected with a plurality of spray pipes 35 arranged toward the inside, and a control valve 36 is provided in the spray pipe 35. The induction switch 30 is electrically connected to the opposite control valve 36 through the PLC controller 3, and the upper end of the spray pipe 35 is connected to a nozzle 37. Through this component, when the automatic welding machine welds the spiral blade 15 to the surface of the drum, the gravity distribution of the drum can be automatically detected. When the detection finds that the gravity distribution of the drum has changed due to welding, the operator can be reminded in time to perform counterweight leveling on the drum, thereby ensuring the subsequent cutting efficiency and working stability of the spiral drum;

[0036] The first electric push rod 8 is arranged in the rotating column 5 and the round table 7. The moving end of the first electric push rod 8 is fixedly connected to the support seat 9. The side wall of the support seat 9 is fixedly connected to a plurality of second electric push rods 10. The moving end of the second electric push rod 10 is fixedly connected to the centering plate 11 through the sensing component 38. The side wall of the centering plate 11 is fixedly connected to two rollers 12. The sensing component 38 includes a transverse cylinder 381 and a moving seat 382. The transverse cylinder 381 is fixedly connected to the moving end of the second electric push rod 10. The moving seat 382 is fixedly connected to the inner wall of the transverse cylinder 381 through a spring. The moving seat 382 is fixedly connected to a transverse rod 39 away from the side wall of the second electric push rod 10. One end of the transverse rod 39 away from the moving seat 382 extends out of the transverse cylinder 381 and is fixedly connected to a fixed frame 40. The inner wall of the fixed frame 40 is rotatably connected to a rotating pin 41. The rotating pin 41 extends out of one end of the fixed frame 40 and is fixedly connected to the centering plate 11. The fixed frame 40 The inner wall of the mounting frame 1 is fixedly connected to two placing plates 42, and the same spring is fixedly connected between the placing plate 42 and the rotating pin 41, and the end of the rotating pin 41 away from the centering plate 11 is fixedly connected to a conductive rod 43, and the conductive rod 43 is electrically connected to an external power supply. The inner wall of the fixed frame 40 is fixedly connected to an arc seat 44, and the inner wall of the arc seat 44 is fixedly connected to two arc resistor plates 45, and the ends of the two arc resistor plates 45 away from each other are electrically connected to the PLC controller 3. The lower side wall of the mounting frame 1 is fixedly connected to a lamp board 46, and the front side wall of the lamp board 46 is fixedly connected to multiple rows of lamp beads 47. The arc resistor plate 45 is electrically connected to the lamp beads 47 through the PLC controller 3. Through this component, the inner wall of the drum can be detected after the drum welding is completed. When the inner wall of the drum changes due to welding stress, the change of the inner wall can be promptly fed back to the operator, which is convenient for the operator to repair the drum later.

[0037] The third electric push rod 13 is fixedly connected to the side wall of the connecting frame 4. The movable end of the third electric push rod 13 is fixedly connected to the circular plate 14. The lower side wall of the circular plate 14 is connected to the automatic welding assembly 16. Three clamping assemblies 24 are evenly distributed on the lower side wall of the circular plate 14 and are used to clamp and fix the spiral blade 15. The automatic welding assembly 16 includes a circular guide rail 161 and a sliding block 162. The circular guide rail 161 is fixedly connected to the lower side wall of the circular plate 14. The sliding block 162 is slidably set on the circular guide rail 161. Inside, the lower side wall of the sliding block 162 is fixedly connected with a bent plate 17, the lower end of the bent plate 17 extends out of the circular guide rail 161 and is fixedly connected to a linear motor 18, the side wall of the bent plate 17 is fixedly connected with a mobile motor 19, the mobile motor 19 is connected to the circular guide rail 161 through an annular gear plate transmission assembly, the mobile end of the linear motor 18 is fixedly connected with a lifting plate 20, the upper side wall of the lifting plate 20 is fixedly connected with a welding machine 21, and the lower side wall of the lifting plate 20 is fixedly connected with a welding head 2 through a mechanical arm 22 3. The clamping assembly 24 includes a vertical plate 241 and a horizontal electric push rod 242. The vertical plate 241 is fixedly connected to the lower side wall of the circular plate 14, and the horizontal electric push rod 242 is fixedly connected to the side wall of the vertical plate 241. The movable end of the horizontal electric push rod 242 is fixedly connected to the clamping frame 25. The upper and lower side walls of the clamping frame 25 are fixedly connected to the clamping electric push rod 26. The movable end of the clamping electric push rod 26 passes through the clamping frame 25 and is fixedly connected to the clamping plate 27 that fits together with the spiral blade 15. The side wall of the lower clamping plate 27 is inlaid with a pressure sensing plate 28. The pressure sensing plate 28 is electrically connected to the PLC controller 3 through a pressure sensor. Through this assembly, when the spiral blade 15 is welded to the drum surface, the spiral blade 15 can be stably clamped during the welding process, so that the spiral blade 15 always remains in the set position and angle, and the power and welding speed of the welding machine are automatically adjusted according to the deformation direction of the spiral blade 15, thereby ensuring the welding quality of the spiral blade 15.

[0038] An annular storage groove 48 is provided on the upper side wall of the cone 7, and a magnetic induction heating coil 49 is placed in the annular storage groove 48. A vertical electric push rod 50 is fixedly connected to the upper side wall of the ring plate 311. The movable end of the vertical electric push rod 50 passes through the annular storage groove 48 and is fixedly connected to the magnetic induction heating coil 49, which can preheat the roller and reduce the impact of thermal stress during welding.

[0039] The upper side wall of the horizontal cylinder 381 is fixedly connected to the limiting frame 51, the side wall of the limiting frame 51 is fixedly connected to the limiting electric push rod 52, the movable end of the limiting electric push rod 52 is fixedly connected to the limiting pin 53, the upper side wall of the horizontal cylinder 381 is provided with a vertical hole that matches the limiting pin 53, and the upper side wall of the movable seat 382 is provided with a limiting groove that matches the limiting pin 53, which can fix the movable seat 382.

[0040] The operating principle of the present invention is described as follows: the cylinder ( Figure 1 The part marked a) is placed on the surface of the truncated table 7, and then an electrical signal is transmitted to the PLC controller 3 through the operation panel 2. After receiving the electrical signal, the PLC controller 3 will control multiple second electric push rods 10 to work simultaneously. The second electric push rods 10 drive the centering plate 11 and the roller 12 to move to the set position in the direction of the cylinder through the sensing component 38, so that the roller 12 contacts the inner wall of the cylinder. When the cylinder is placed in an incorrect position, the centering plate 11 will drive the cylinder to move through the roller 12 to adjust the position of the cylinder until all the centering plates 11 contact the inner wall of the cylinder through the roller 12, and the cylinder will stop moving. Since multiple centering plates 11 are distributed along the central circumference of the support seat 9, the center of the cylinder and the center of the support seat 9 are on the same straight line at this time, and the cylinder can be placed properly;

[0041] Then the PLC controller 3 controls the third electric push rod 13 to work, and the third electric push rod 13 drives the clamping assembly 24 and the automatic welding assembly 16 to move downward to the set position through the circular plate 14. Then the PLC controller 3 controls the three horizontal electric push rods 242 to work at the same time. The horizontal electric push rod 242 drives the spiral blade 15 to move to the set position in the direction close to the cylinder through the clamping frame 25 and the clamping plate 27, so that the spiral blade 15 contacts the outer wall of the cylinder. Then the PLC controller 3 controls the linear motor 18 to work, and the linear motor 18 drives the lifting plate 20, the robot arm 22 and the welding head 23 to move downward to the set position. Then, the robotic arm 22 drives the welding head 23 to move to the upper weld seam between the spiral blade 15 and the cylinder, and the welding head 23 is used to weld the upper weld seam. When the welding power of the welding machine 21 is too high, the thermal expansion at the upper weld seam will be more obvious, and the upper weld seam will heat up rapidly, while the temperature of the part far away from the weld seam will be relatively low. This uneven heating will cause different degrees of thermal expansion of different parts of the material, thereby causing the spiral blade 15 to tilt downward. At this time, the spiral blade 15 will remain stationary under the fixation of the clamping assembly 24, and the force of the spiral blade 15 tilting downward will be sensed by the pressure sensing plate 28 on the surface of the clamping plate 27 below. The pressure sensing plate 28 and the pressure sensor The pressure sensor is connected to the pressure sensing plate 28. After the pressure sensor detects that the pressure sensing plate 28 is subjected to a large pressure, the pressure sensor will send an electrical signal to the PLC controller 3. After receiving the electrical signal, the PLC controller 3 will reduce the welding power of the welding machine 21 and increase the moving speed of the welding head 23 (for example, after the pressure sensor detects a pressure of 50N again on the basis of the clamping force, the pressure sensor will control the output current of the welding machine 21 to reduce by 20A through the PLC controller 3, and control the moving speed of the robot arm 22 to increase by 10cm / min), so as to avoid the thermal stress generated during welding on the welding position of the spiral blade 15 as much as possible. Due to the influence of the position, when the welding of the weld seam above the spiral blade 15 is completed, the PLC controller 3 will control the two clamping electric push rods 26 on this side to drive the clamping plate 27 and the spiral blade 15 to separate, and then the PLC controller 3 controls the horizontal electric push rod 242 to work, so that the horizontal electric push rod 242 drives the clamping frame 25 and the spiral blade 15 to separate, and then the PLC controller 3 controls the mechanical arm 22 to drive the welding head 23 to weld the weld seam below the spiral blade 15. Since the power of the welding machine 21 has been adjusted at this time, when welding the weld seam below the spiral blade 15, the spiral blade 15 will not bend or deform due to the thermal stress during welding;

[0042] When the three spiral blades 15 are welded, the PLC controller 3 will control the third electric push rod 13 to drive the circular plate 14 to move upward to the initial position, and at the same time control all the limit electric push rods 52 to drive the limit pin 53 and the moving seat 382 to separate. Then the PLC controller 3 controls the first electric push rod 8 to work, and the first electric push rod 8 will drive the support seat 9, the second electric push rod 10, the induction component 38, the centering plate 11 and the roller 12 to move back and forth once. When the cylinder is locally deformed due to the thermal stress of welding, the roller 12 on one side will move back and forth after passing through the deformed area. The centering plate 11 and the rotating pin 41 are driven to rotate around the hinge, and the rotating pin 41 will drive the conductive rod 43 to rotate together, and the rotation position of the centering plate 11 can be compensated by the expansion and contraction of the cross bar 39 in the cross cylinder 381. The conductive rod 43 will contact the arc-shaped resistor plate 45 on one side during the rotation process. The conductive rod 43 is electrically connected to the external power supply, and the end of the arc-shaped resistor plate 45 away from the conductive rod 43 is electrically connected to the PLC controller 3. When the conductive rod 43 contacts the arc-shaped resistor plate 45, the external current will be transmitted to the PLC controller 3 through the arc-shaped resistor plate 45, and the cylinder The greater the degree of deformation, the greater the rotation angle of the conductive rod 43 driven by the centering plate 11, and the closer the conductive rod 43 will contact the arc-shaped resistor plate 45 near the end of the placement plate 42, thereby reducing the resistance of the arc-shaped resistor plate 45 to the circuit of the PLC controller 3 and increasing the current. The PLC controller 3 converts the received current signal into an electrical signal that can be processed by the PLC controller 3 through the current sensor. After receiving the analog signal from the current sensor, the PLC controller 3 converts the input analog signal into an actual current value through the analog input function block. According to the range and output signal type of the current sensor, corresponding parameters are set to ensure accurate reading of the current magnitude. According to different current ranges, corresponding logic judgment programs are written. For example, multiple current intervals can be set, and each interval corresponds to a different number of lamp beads 47 lighting up. When the input current is in a certain interval, the PLC controller 3 outputs a corresponding control signal to light up the corresponding number of lamp beads 47. Because the first electric push rod 8 drives the centering plate 11 to move upward at a slow speed, the lamp beads 47 work for a longer time. The operator can judge the degree of deformation inside the cylinder by observing the number of lamp beads 47 that light up.

[0043] When the inspection of the inner wall of the cylinder is completed, the PLC controller 3 will control multiple second electric push rods 10 to drive the centering plate 11 to retract to the initial position, and control the first electric push rod 8 to drive the support seat 9 to move downward to the initial position, and then the PLC controller 3 will control the drive motor 6 to work. The drive motor 6 drives the rotating column 5, the table 7 and the cylinder to rotate together through the bevel gear transmission assembly. When the cylinder has uneven gravity distribution on the surface of the roller due to uneven weld quality, unreasonable position distribution of the spiral blades 15, etc., the center of gravity of the roller will shift. When the table 7 drives the roller to rotate, the roller moves in the direction of the center of gravity shift under the action of centrifugal force, and a ball 54 is provided between the table 7 and the roller to reduce the friction between the table 7 and the roller, so that the roller can move easily. During the movement of the roller, the inner wall will squeeze the induction switch on one side. Switch 30 (when welding the roller, the PLC controller 3 will control the small electric push rod 292 to drive the induction switch 30 to move toward the set position close to the roller according to the size of the inner diameter of the roller). After the induction switch 30 is squeezed, the induction switch 30 will control the pump 32 and the opposite control valve 36 through the PLC controller 3 to work for a set time (for example, when the induction switch 30 on the left is squeezed, the control valve 36 on the right will be powered on and opened). The pump 32 transports the paint inside the paint box 312 to the annular pipe 34, and sprays it out through the corresponding spray pipe 35 and nozzle 37. Since the spray pipe 35 and the nozzle 37 are set toward the roller, they can mark the surface of the roller. The operator can then perform counterweight leveling on the roller according to the position of the mark, thereby ensuring the subsequent cutting efficiency and working stability of the spiral roller.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic welding machine for a spiral drum of a coal mining machine, comprising a mounting frame (1) and an operating panel (2) and a PLC controller (3) arranged on the lower side wall of the mounting frame (1), wherein the upper side wall of the mounting frame (1) is fixedly connected to a connecting frame (4), characterized in that: Also includes: A rotating column (5) is rotatably arranged on the upper side wall of the mounting frame (1); a driving motor (6) is fixedly connected to the upper side wall of the mounting frame (1); the driving motor (6) is transmission-connected to the rotating column (5) via a bevel gear transmission assembly; a frustum (7) is fixedly connected to the upper end of the rotating column (5); a uniformity detection assembly (29) and a marking assembly (31) are connected to the surface of the frustum (7); A first electric push rod (8) is arranged in the rotating column (5) and the truncated table (7); the movable end of the first electric push rod (8) is fixedly connected to a support seat (9); the side wall of the support seat (9) is fixedly connected to a plurality of second electric push rods (10); the movable end of the second electric push rod (10) is fixedly connected to a centering plate (11) via an induction component (38); the side wall of the centering plate (11) is fixedly connected to two rollers (12); A third electric push rod (13) is fixedly connected to the side wall of the connecting frame (4); a movable end of the third electric push rod (13) is fixedly connected to a circular plate (14); and a lower side wall of the circular plate (14) is connected to an automatic welding assembly (16); Three clamping assemblies (24) are evenly distributed on the lower side wall of the circular plate (14) and are used for clamping and fixing the spiral blades (15).

2. The automatic welding machine for spiral drum of coal mining machine according to claim 1, characterized in that: The automatic welding assembly (16) includes a circular guide rail (161) and a sliding block (162). The circular guide rail (161) is fixedly connected to the lower side wall of the circular plate (14). The sliding block (162) is slidably arranged in the circular guide rail (161). The lower side wall of the sliding block (162) is fixedly connected to a bent plate (17). The lower end of the bent plate (17) extends out of the circular guide rail (161) and is fixedly connected to a linear motor (18). The side wall of the bent plate (17) is fixedly connected to a moving motor (19). The moving motor (19) is transmission-connected to the circular guide rail (161) through an annular gear plate transmission assembly. The moving end of the linear motor (18) is fixedly connected to a lifting plate (20). The upper side wall of the lifting plate (20) is fixedly connected to a welding machine (21). The lower side wall of the lifting plate (20) is fixedly connected to a welding head (23) through a mechanical arm (22).

3. The automatic welding machine for spiral drum of coal mining machine according to claim 1, characterized in that: The clamping assembly (24) includes a vertical plate (241) and a horizontal electric push rod (242), the vertical plate (241) is fixedly connected to the lower side wall of the circular plate (14), the horizontal electric push rod (242) is fixedly connected to the side wall of the vertical plate (241), the movable end of the horizontal electric push rod (242) is fixedly connected to the clamping frame (25), the upper and lower side walls of the clamping frame (25) are fixedly connected to the clamping electric push rod (26), the movable end of the clamping electric push rod (26) passes through the clamping frame (25), and is fixedly connected to a clamping plate (27) that is in contact with the spiral blade (15), and the side wall of the clamping plate (27) located on the lower side is inlaid with a pressure sensing plate (28), and the pressure sensing plate (28) is electrically connected to the PLC controller (3) through a pressure sensor.

4. The automatic welding machine for spiral drum of coal mining machine according to claim 1, characterized in that: The uniformity detection component (29) comprises a fixed ring (291) and a plurality of small electric push rods (292), wherein the fixed ring (291) is fixedly connected to the upper side wall of the truncated table (7), and the plurality of small electric push rods (292) are evenly distributed on the outer wall of the fixed ring (291). The movable end of the small electric push rod (292) is fixedly connected to an induction switch (30), and the induction switch (30) is electrically connected to the marking component (31) via a PLC controller (3). The upper side wall of the truncated table (7) is fixedly connected to a plurality of balls (54).

5. The automatic welding machine for spiral drum of coal mining machine according to claim 4, characterized in that: The marking assembly (31) comprises a ring plate (311) and a paint box (312), wherein the ring plate (311) is fixedly sleeved on the outer wall of the rotating column (5), and the paint box (312) is fixedly connected to the upper side wall of the ring plate (311). The upper side wall of the paint box (312) is fixedly connected to a pump (32), and the induction switch (30) is electrically connected to the pump (32) via a PLC controller (3). The feed end of the pump (32) is located in the paint box (312). The upper side of the truncated table (7) is fixedly connected to the upper side wall of the truncated table (3). An annular groove (33) is provided on the wall, and an annular tube (34) is placed in the annular groove (33). The discharge end of the pump (32) passes through the truncated cone (7) and is connected to the annular tube (34). The upper side wall of the annular tube (34) is fixedly connected to a plurality of spray pipes (35) arranged toward the inside. A control valve (36) is provided in the spray pipe (35). The induction switch (30) is electrically connected to the opposite control valve (36) through the PLC controller (3). The upper end of the spray pipe (35) is connected to a nozzle (37).

6. The automatic welding machine for spiral drum of coal mining machine according to claim 1, characterized in that: The induction component (38) includes a transverse cylinder (381) and a movable seat (382), wherein the transverse cylinder (381) is fixedly connected to the movable end of the second electric push rod (10), and the movable seat (382) is fixedly connected to the inner wall of the transverse cylinder (381) through a spring, and the movable seat (382) is fixedly connected to a transverse rod (39) away from the side wall of the second electric push rod (10), and one end of the transverse rod (39) away from the movable seat (382) extends out of the transverse cylinder (381) and is fixedly connected to a fixed frame (40), and the inner wall of the fixed frame (40) is rotatably connected to a rotating pin (41), and the rotating pin (41) extends out of one end of the fixed frame (40) and is fixedly connected to the centering plate (11), and the inner wall of the fixed frame (40) is fixedly connected to two placement plates (42). The placement plate (42) and the rotating pin (41) are fixedly connected with a same spring, the end of the rotating pin (41) away from the centering plate (11) is fixedly connected with a conductive rod (43), the conductive rod (43) is electrically connected to an external power supply, the inner wall of the fixed frame (40) is fixedly connected with an arc seat (44), the inner wall of the arc seat (44) is fixedly connected with two arc resistor plates (45), the ends of the two arc resistor plates (45) away from each other are electrically connected to the PLC controller (3), the lower side wall of the mounting frame (1) is fixedly connected with a lamp board (46), the front side wall of the lamp board (46) is fixedly connected with multiple rows of lamp beads (47), and the arc resistor plates (45) are electrically connected to the lamp beads (47) through the PLC controller (3).

7. The automatic welding machine for spiral drum of coal mining machine according to claim 5, characterized in that: An annular storage groove (48) is provided on the upper side wall of the circular table (7), a magnetic induction heating coil (49) is placed in the annular storage groove (48), a vertical electric push rod (50) is fixedly connected to the upper side wall of the ring plate (311), and a movable end of the vertical electric push rod (50) passes through the annular storage groove (48) and is fixedly connected to the magnetic induction heating coil (49).

8. The automatic welding machine for spiral drum of coal mining machine according to claim 6, characterized in that: The upper side wall of the transverse cylinder (381) is fixedly connected to the limiting frame (51), the side wall of the limiting frame (51) is fixedly connected to the limiting electric push rod (52), the movable end of the limiting electric push rod (52) is fixedly connected to the limiting pin (53), the upper side wall of the transverse cylinder (381) is provided with a vertical hole that matches the limiting pin (53), and the upper side wall of the movable seat (382) is provided with a limiting groove that matches the limiting pin (53).

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