Cutting pick machining and welding device of coal mining machine

Abstract

The invention belongs to the technical field of intelligent manufacturing equipment, and particularly relates to a cutting tooth machining and welding device of a coal mining machine. The device further comprises an electromagnetic induction heating assembly, a plurality of sets of material supporting mechanisms, a rotary bearing mechanism, a special-shaped degree detection feedback mechanism, a welding speed and temperature automatic regulation and control mechanism and a PLC. According to the cutting pick welding device, the hard alloy head and the cutting pick body can be rapidly welded together in the cutting pick machining process, the cutting pick can automatically rotate during welding, then it is guaranteed that all parts of the cutting pick are evenly heated during welding, the special-shaped degree of the welding position of the cutting pick can be rapidly detected before welding, and the welding precision is improved. And specific information obtained through detection is fed back to the welding work in a current change mode, so that the welding temperature and the welding speed are more accurately regulated and controlled, and the welding speed and the welding temperature in the welding work can be quickly regulated to achieve the optimal setting.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent manufacturing equipment, and in particular relates to a pick processing and welding device for a coal mining machine. Background Art

[0002] The pick of a coal mining machine is one of the key components of the machine, and is mainly used to cut coal and rock. During the coal mining process, the pick is in direct contact with the coal and rock, and through rotation and advancement, the coal and rock are crushed and cut off to achieve coal mining operations. Its performance directly affects the production efficiency, coal mining quality and service life of the coal mining machine.

[0003] At present, in the processing of pick teeth, it is necessary to use a welding device to firmly weld the carbide head of the pick tooth to the pick body. The specific steps are: the pick body and the carbide head are installed on a clamping mechanism, and the welding power supply provides welding current to melt the welding material (usually brazing material) and fill the gap between the pick body and the carbide head. During the cooling process, the welding material solidifies to form a firm connection.

[0004] In the coal mining machine picks, the welding position design of some carbide heads and the pick bodies is relatively complex. This complex design can make the carbide heads and the pick bodies have a larger contact area, form more welding points during the welding process, thereby improving the strength and stability of the welding. At the same time, the complex welding position allows the carbide heads to better withstand wear at different angles and positions. For example, in special coal mining conditions, when the pick contacts the coal rock at a specific angle, the complex welding design can ensure that the carbide heads effectively resist wear at these angles and extend the service life of the picks. However, for this type of pick, there are more corners, narrow areas and connection points at different angles in the welding area. In order to ensure that the welding materials are sufficient In order to fill these complex parts and avoid defects such as incomplete welding and pores, a slower welding speed is required to fully melt the solder and ensure that the carbide head and the pick body are completely combined. When the welding speed is reduced, the welding temperature should be reduced simultaneously to prevent excessive heating from causing material performance degradation. At present, most staff members rely on their judgment of the degree of abnormality of the pick welding position to adjust the welding speed and welding temperature based on experience. This operation is often not accurate enough and affects the welding and forming quality of the pick. Too fast welding speed will lead to incomplete welding of the pick, and too slow welding speed will greatly affect the processing efficiency of the pick. Too high welding temperature will cause overheating, and too low welding temperature will cause incomplete melting of the solder. Summary of the invention

[0005] The object of the present invention is to provide a pick processing and welding device for a coal mining machine in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a pick processing and welding device for a coal mining machine, comprising a base, a chain plate conveyor is fixedly mounted on the upper end of the base, and further comprising:

[0007] An electromagnetic induction heating assembly is fixedly mounted on the upper end of the base, and a heating end is arranged outside the upper end of the chain conveyor;

[0008] Multiple groups of supporting mechanisms are evenly arranged on the chain conveyor;

[0009] A rotating supporting mechanism is fixedly mounted on the upper end of the base;

[0010] A profile detection feedback mechanism is fixedly mounted on the upper end of the base and arranged on one side of the rotating support mechanism;

[0011] A welding speed and temperature automatic control mechanism is fixedly mounted on the upper end of the base and is electrically connected to the irregularity detection feedback mechanism;

[0012] The PLC controller is fixedly mounted on the upper end of the base and is electrically connected to the electromagnetic induction heating assembly, the rotating support mechanism, the profile detection feedback mechanism, and the welding speed and temperature automatic control mechanism.

[0013] In the above-mentioned coal mining machine pick processing and welding device, the electromagnetic induction heating assembly includes an L-shaped support plate fixedly mounted on the upper end of the base, a heating element is fixedly mounted on the vertical side wall of the L-shaped support plate, and a high-frequency power supply is fixedly mounted on the upper end of the L-shaped support plate, and the high-frequency power supply is electrically connected to the heating element.

[0014] In the above-mentioned coal mining machine pick processing and welding device, the supporting mechanism includes a transmission shaft rotatably connected to the chain conveyor, the end of the transmission shaft located outside the chain conveyor is fixedly connected to a rotating plate, and the side of the rotating plate away from the transmission shaft is symmetrically fixedly connected to multiple supporting rods, the end of the transmission shaft located inside the chain conveyor is fixedly connected to a transmission gear, the upper end of the base is fixedly connected to the same transmission rack through multiple extension rods, the transmission rack is meshingly connected to the transmission gear, and the transmission rack is horizontally arranged.

[0015] In the above-mentioned coal mining machine pick processing and welding device, the rotating supporting mechanism includes a stepper motor fixedly mounted on the upper end of the base, the upper output end of the stepper motor is fixedly connected to a hollow supporting platform, a dual-axis motor is fixedly mounted in the middle position inside the hollow supporting platform, both end output ends of the dual-axis motor are fixedly connected to a rotating screw, the end of the rotating screw away from the dual-axis motor is rotatably connected to the inner wall of the hollow supporting platform through a bearing, the rod wall of the rotating screw is threadedly sleeved with a clamping rod of an L-shaped structure, the upper end of the hollow supporting platform is provided with a strip-shaped through-hole for the upper end of the clamping rod to extend through, and the upper end rod wall of the clamping rod is fixedly connected to an arc-shaped clamping plate.

[0016] The cam is provided with a plurality of guide rails arranged side by side, and a plurality of guide rails are provided on the inner wall of the cam, and a plurality of guide rails are provided on the inner wall of the cam, and a plurality of guide rails are provided on the inner wall of the cam. The upper side is also symmetrically fixedly connected with a recessed feedback resistor rod and a convex feedback resistor rod, and the upper sides of the recessed feedback resistor rod and the convex feedback resistor rod facing each other are respectively provided with a recessed adjustment seat and a convex adjustment seat, and the lower end of the recessed adjustment seat is fixedly provided with a recessed feedback conductive contact electrically in contact with the recessed feedback resistor rod, and the lower end of the convex adjustment seat is fixedly provided with a convex feedback conductive contact electrically in contact with the convex feedback resistor rod, and the recessed feedback resistor rod and the convex feedback resistor rod are fixedly connected with a side plate at the facing ends, and a plurality of limiting sliding rods are fixedly installed between the side plate and the feedback shell, and the side walls of the recessed adjustment seat and the convex adjustment seat are each provided with a plurality of sliding holes slidably sleeved with the limiting sliding rods, and the recessed adjustment seat and the convex adjustment seat are both fixedly connected with the side plates, and a plurality of reset springs sleeved outside the limiting sliding rods are respectively provided with the side plates, and the upper ends of the synchronization block are fixedly connected with pushing rods on opposite sides, and the side walls of the synchronization block are provided with a rectangular opening for the side plates to pass through and extend into.

[0017] In the above-mentioned coal mining machine pick processing and welding device, the welding speed and temperature automatic control mechanism includes a control shell fixedly mounted on the upper end of the base, an adjusting screw is rotatably connected to the inner upper side of the control shell, an adjusting motor for driving the adjusting screw to rotate is fixedly mounted on the outer wall of the control shell, a movable seat is threadedly sleeved on the rod wall of the adjusting screw, a speed feedback resistor rod arranged parallel to the adjusting screw is fixedly mounted inside the control shell, a sleeve hole sleeved on the side wall of the movable seat, and a speed feedback conductive contact electrically contacted with the speed feedback resistor rod is fixedly connected to the inner wall of the corresponding sleeve hole, a plurality of frequency switches are equidistantly fixedly mounted on the bottom of the inner wall of the control shell, and a trigger round head corresponding to the position of the frequency switch is fixedly mounted on the lower end of the movable seat.

[0018] In the above-mentioned pick processing and welding device for a coal mining machine, a confirmation switch is fixedly installed at the middle position of the bottom inner wall of the feedback shell, and a pressing round head corresponding to the position of the confirmation switch is fixedly installed at the lower end of the sliding seat.

[0019] In the above-mentioned pick processing and welding device for a coal mining machine, a limit slider is fixedly installed on the upper end of the movable seat, and a limit slot that matches and slides with the limit slider is opened on the top of the inner wall of the regulating shell.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Through the electromagnetic induction heating assembly, supporting mechanism and chain conveyor, the carbide head and the pick body can be quickly welded together during the pick processing, and the pick can be automatically rotated during welding, thereby ensuring that all parts of the pick are heated evenly during welding, so that the welding material is fully melted and evenly filled in the gap between the carbide head and the pick body, forming a uniform weld, avoiding welding defects such as partial incomplete penetration, slag inclusions or pores, and improving the strength and sealing of the welded joint. Uniform heating can make the overall temperature change of the pick relatively gentle, thereby reducing the thermal stress caused by local overheating or overcooling, which is helpful to improve the welding quality and service life of the pick.

[0022] 2. Through the setting of the rotating support mechanism and the irregularity detection feedback mechanism, the irregularity of the welding position of the pick can be quickly detected before welding, and the specific information obtained from the detection can be fed back to the welding work in the form of current changes, so as to more accurately control the welding temperature and welding speed. Compared with the traditional 3D scanner detection method, this solution is faster, more convenient, and has lower cost, and is suitable for wide promotion and use.

[0023] 3. Through the automatic control mechanism of welding speed and temperature, the welding speed and welding temperature in welding work can be quickly adjusted to achieve the best setting. When the welding position of the pick is more irregular, the welding speed is reduced and the welding temperature is reduced simultaneously. This can ensure that the solder is fully melted and the carbide head and the pick body are completely combined, and avoid overheating of welding work due to excessive temperature, thereby affecting material properties. When the welding position of the pick is less irregular, the welding speed and welding temperature are increased to ensure the efficiency of welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a pick in the prior art;

[0025] Figure 2 It is a front view structural schematic diagram of the present invention;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the chain conveyor of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the electromagnetic induction heating assembly of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the material supporting mechanism of the present invention;

[0029] Figure 6 It is a schematic cross-sectional structural diagram of the rotary support mechanism of the present invention;

[0030] Figure 7 It is a partial cross-sectional structural schematic diagram of the profile degree detection feedback mechanism of the present invention;

[0031] Figure 8 yes Figure 7 A magnified view of part A;

[0032] Fig. 9 It is a cross-sectional structural schematic diagram of the welding speed and temperature automatic control mechanism of the present invention.

[0033] In the figure: 1 base, 2 electromagnetic induction heating component, 21 L-shaped support plate, 22 heating element, 23 high-frequency power supply, 3 support mechanism, 31 transmission shaft, 32 rotating plate, 33 support rod, 34 transmission gear, 35 transmission rack, 4 rotation support mechanism, 41 stepper motor, 42 hollow support platform, 43 dual-axis motor, 44 rotating screw, 45 clamping rod, 46 strip-shaped opening, 47 arc-shaped clamping plate, 5 special-shaped degree detection feedback mechanism, 51 vertical plate, 52 electric push rod, 53 feedback shell, 54 guide slide rod, 55 sliding seat, 56 push-pull rod, 57 universal ball, 58 compensation spring, 59 synchronization block, 510 conductive block, 511 recessed electrical connection strip , 512 raised electrical connection strip, 513 recessed feedback resistor rod, 514 raised feedback resistor rod, 515 recessed adjustment seat, 516 raised adjustment seat, 517 recessed feedback conductive contact piece, 518 raised feedback conductive contact piece, 519 side plate, 520 limit slide bar, 521 return spring, 522 push rod, 523 rectangular opening, 524 confirmation switch, 525 pressing round head, 6 welding speed and temperature automatic control mechanism, 61 control shell, 62 adjustment screw, 63 adjustment motor, 64 moving seat, 65 speed feedback resistor rod, 66 speed feedback conductive contact piece, 67 frequency switch, 68 trigger round head, 7 chain conveyor, 8PLC controller. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0035] like Figure 1-Figure 9 As shown, a pick processing and welding device for a coal mining machine includes a base 1, a chain plate conveyor 7 is fixedly installed on the upper end of the base 1, and further includes:

[0036] The electromagnetic induction heating component 2 is fixedly mounted on the upper end of the base 1, and the heating end is arranged on the outer side of the upper end of the chain conveyor 7. The electromagnetic induction heating component 2 includes an L-shaped support plate 21 fixedly mounted on the upper end of the base 1, and a heating element 22 is fixedly mounted on the side wall of the vertical portion of the L-shaped support plate 21. A high-frequency power supply 23 is fixedly mounted on the upper end of the L-shaped support plate 21, and the high-frequency power supply 23 is electrically connected to the heating element 22.

[0037] A plurality of groups of supporting mechanisms 3 are evenly arranged on the chain conveyor 7, and the supporting mechanism 3 includes a transmission shaft 31 rotatably connected to the chain conveyor 7, one end of the transmission shaft 31 located outside the chain conveyor 7 is fixedly connected to a rotating plate 32, and a plurality of supporting rods 33 are symmetrically fixedly connected to the side of the rotating plate 32 away from the transmission shaft 31, and one end of the transmission shaft 31 located inside the chain conveyor 7 is fixedly connected to a transmission gear 34, and the upper end of the base 1 is fixedly connected to the same transmission rack 35 through a plurality of extension rods, and the transmission rack 35 is meshed with the transmission gear 34, and the transmission rack 35 is horizontally arranged.

[0038] The rotating supporting mechanism 4 is fixedly mounted on the upper end of the base 1. The rotating supporting mechanism 4 includes a stepper motor 41 fixedly mounted on the upper end of the base 1. The upper output end of the stepper motor 41 is fixedly connected to a hollow supporting platform 42. A dual-axis motor 43 is fixedly mounted in the middle position inside the hollow supporting platform 42. Both end output ends of the dual-axis motor 43 are fixedly connected to a rotating screw 44. One end of the rotating screw 44 away from the dual-axis motor 43 is rotatably connected to the inner wall of the hollow supporting platform 42 through a bearing. The rod wall of the rotating screw 44 is threadedly sleeved with a clamping rod 45 of an L-shaped structure. The upper end of the hollow supporting platform 42 is provided with a strip opening 46 for the upper end of the clamping rod 45 to extend through. The upper end rod wall of the clamping rod 45 is fixedly connected with an arc-shaped clamping plate 47.

[0039] The profile detection feedback mechanism 5 is fixedly mounted on the upper end of the base 1 and is arranged on one side of the rotating support mechanism 4. The profile detection feedback mechanism 5 includes a vertical plate 51 fixedly mounted on the upper end of the base 1. The upper end side wall of the vertical plate 51 is fixedly sleeved with an electric push rod 52. The movable end of the electric push rod 52 is fixedly connected with a feedback shell 53. A plurality of guide slide rods 54 arranged side by side are fixedly mounted inside the feedback shell 53. The plurality of guide slide rods 54 are slidably sleeved with the same sliding seat 55. The front side of the sliding seat 55 is symmetrically fixedly connected with a plurality of push-pull rods 56. The ends of the plurality of push-pull rods 56 away from the sliding seat 55 extend through the plurality of push-pull rods 56. The feedback shell 53 is outside and fixedly connected with a universal ball 57. A plurality of compensation springs 58 sleeved on the outside of the guide slide rod 54 are fixedly installed on the side of the sliding seat 55 away from the push-pull rod 56 and the inner wall of the feedback shell 53. A synchronization block 59 is fixedly connected to the upper end of the sliding seat 55. A conductive block 510 is fixedly installed on the upper end of the synchronization block 59. Two recessed electrical connection strips 511 and a protruding electrical connection strip 512 symmetrically arranged about the conductive block 510 are fixedly installed on the top of the inner wall of the feedback shell 53. A recessed feedback resistor rod 513 and a protruding feedback resistor rod 514 are also symmetrically fixedly connected to the inner upper side of the feedback shell 53. The rod 513 and the raised feedback resistor rod 514 are provided with a recessed adjustment seat 515 and a raised adjustment seat 516 on the upper side of the facing ends thereof, respectively; a recessed feedback conductive contact piece 517 which is in electrical contact with the recessed feedback resistor rod 513 is fixedly installed at the lower end of the recessed adjustment seat 515; a raised feedback conductive contact piece 518 which is in electrical contact with the raised feedback resistor rod 514 is fixedly installed at the lower end of the raised adjustment seat 516; the facing ends of the recessed feedback resistor rod 513 and the raised feedback resistor rod 514 are both fixedly connected with a side plate 519; a plurality of limit sliding rods 520 are fixedly installed between the side plate 519 and the feedback shell 53; the recessed adjustment seat 515 is provided with a recessed feedback conductive contact piece 517 which is in electrical contact with the recessed feedback resistor rod 513; and a raised feedback conductive contact piece 518 which is in electrical contact with the raised feedback resistor rod 514 is fixedly installed at the lower end of the raised adjustment seat 516. The side walls of the recessed adjustment seat 515 and the raised adjustment seat 516 are provided with a plurality of sliding holes slidably sleeved with the limit slide bar 520, and a plurality of return springs 521 sleeved on the outside of the limit slide bar 520 are fixedly connected between the recessed adjustment seat 515 and the raised adjustment seat 516 and the side plate 519, and the upper ends of the synchronous block 59 are fixedly connected with the pushing rods 522 on both sides opposite to each other, and the side walls of the synchronous block 59 are provided with a rectangular opening 523 for the side plate 519 to penetrate and extend therethrough, a confirmation switch 524 is fixedly installed at the middle position of the bottom of the inner wall of the feedback shell 53, and a pressing round head 525 corresponding to the position of the confirmation switch 524 is fixedly installed at the lower end of the sliding seat 55.

[0040] The welding speed and temperature automatic control mechanism 6 is fixedly installed on the upper end of the base 1 and is electrically connected to the irregularity detection feedback mechanism 5. The welding speed and temperature automatic control mechanism 6 includes a control shell 61 fixedly installed on the upper end of the base 1. The upper side of the inner part of the control shell 61 is rotatably connected with an adjusting screw 62. The outer wall of the control shell 61 is fixedly installed with an adjusting motor 63 for driving the adjusting screw 62 to rotate. The rod wall of the adjusting screw 62 is threadedly sleeved with a moving seat 64. The inner part of the control shell 61 is fixedly installed with a speed control screw 62 arranged parallel to the adjusting screw 62. Feedback resistor rod 65, the side wall of the movable seat 64 is provided with a sleeve hole which is sleeved outside the speed feedback resistor rod 65, and the inner wall of the corresponding sleeve hole is fixedly connected with a speed feedback conductive contact 66 which is in electrical contact with the speed feedback resistor rod 65, a plurality of frequency switches 67 are fixedly installed at equal intervals on the bottom of the inner wall of the regulating shell 61, a trigger round head 68 which is fixedly installed at the lower end of the movable seat 64 and is arranged corresponding to the position of the frequency switch 67, a limit slider is fixedly installed at the upper end of the movable seat 64, and a limit slide groove which is matched with the limit slider and slides in matching manner is provided on the top of the inner wall of the regulating shell 61.

[0041] The PLC controller 8 is fixedly mounted on the upper end of the base 1 and is electrically connected to the electromagnetic induction heating assembly 2, the rotating support mechanism 4, the profile detection feedback mechanism 5 and the welding speed and temperature automatic control mechanism 6 respectively.

[0042] The operating principle of the present invention is described as follows: the carbide head and the pick body are combined, and solder is added in the gap between the two, and then the pick body is placed on the plurality of supporting rods 33 in the supporting mechanism 3 to achieve the relative placement of the picks, the PLC controller 8 controls the operation of the chain plate conveyor 7, the chain plate conveyor 7 drives the pick to move, the high-frequency power supply 23 supplies power to the heating element 22, the high-frequency power supply 23 converts ordinary alternating current into high-frequency alternating current, and then transmits it to the induction coil of the heating element 22, thereby generating a high-frequency alternating magnetic field, and the pick is placed In the high-frequency alternating magnetic field, due to the electromagnetic induction effect, eddy currents are generated inside the heated pick. When the eddy currents flow inside the pick, due to the resistance of the pick itself, electrical energy is converted into thermal energy, thereby increasing the temperature of the object and realizing rapid welding of the pick. In addition, in the process of transferring the pick, when the transmission gear 34 at one end of the transmission shaft 31 contacts the transmission rack 35, the transmission shaft 31 is driven to rotate the pick through the meshing connection of the transmission gear 34 and the transmission rack 35, so that the pick is evenly heated during the welding process, thereby improving the welding quality.

[0043] Before welding the pick, a standard carbide head is taken out first, and the carbide head is placed between two arc-shaped clamping plates 47. The double-axis motor 43 is controlled by the PLC controller 8 to move, and the double-axis motor 43 drives the two rotating screws 44 to rotate synchronously. The threaded sleeve connection between the rotating screw 44 and the clamping rod 45 causes the clamping rod 45 to drive the two arc-shaped clamping plates 47 to move toward each other, thereby making the two arc-shaped clamping plates 47 firmly clamped on the outside of the carbide head, so as to achieve a firm fixation of the carbide head.

[0044] The PLC controller 8 then controls the electric push rod 52 to move, and the electric push rod 52 pushes the feedback housing 53 and the universal ball 57 to move toward the carbide head. When the universal ball 57 hits the outside of the carbide head, as the feedback housing 53 continues to move, the universal ball 57 drives the sliding seat 55 to move along the guide slide bar 54 relative to the feedback housing 53 through the push-pull rod 56 until the sliding seat 55 moves to the middle position inside the feedback housing 53. At this time, the pressing round head 525 at the lower end of the sliding seat 55 presses on the confirmation switch 524, indicating that the sliding seat 55 moves into place. At this time, the PLC controller 8 controls the electric push rod 52 to stop, and the PLC controller 8 controls the stepper motor 41 to move. The stepper motor 41 drives the hollow support platform 42 to rotate, and then drives the carbide head to be detected to rotate, so that the universal ball 57 moves one circle relatively on the outside of the carbide head. When the universal ball 57 encounters the position of the special-shaped depression on the surface of the carbide head, under the squeezing and pushing action of the compensation spring 58, the sliding seat 55 drives the push-pull rod 56 to push the universal ball 57 forward, and then the synchronous block 59 at the upper end of the sliding seat 55 moves forward, and the conductive block 510 at the upper end of the synchronous block 59 The recessed electric connection strip 511 is in contact with the recessed electric connection strip 511, and the power supply circuit of the adjustment motor 63 is connected, so that the adjustment motor 63 is activated. The greater the degree of recess on the surface of the carbide head, the greater the forward movement distance of the synchronization block 59, and the pushing rod 522 on the side wall of the synchronization block 59 pushes the recessed adjustment seat 515 to move along the limit slide bar 520 to overcome the elastic force of the reset spring 521. The greater the distance that the recessed feedback conductive contact piece 517 slides on the recessed feedback resistor rod 513, the smaller the access resistance value of the recessed feedback resistor rod 513, and the recessed feedback conductive contact piece 517 and the recessed feedback resistor rod 513 are connected. The feedback resistor rod 513 is connected in series to the power supply circuit of the regulating motor 63, and the regulating motor 63 is a DC motor. At this time, the power supply current of the regulating motor 63 will increase, and the regulating motor 63 will work at a higher speed. The regulating motor 63 drives the adjusting screw 62 to rotate. Through the threaded sleeve effect of the adjusting screw 62 and the moving seat 64, the moving seat 64 drives the speed feedback conductive contact 66 to slide on the speed feedback resistor rod 65. The greater the sliding distance of the speed feedback conductive contact 66 on the speed feedback resistor rod 65, the greater the access resistance value of the speed feedback resistor rod 65.

[0045] Similarly, when the universal ball 57 encounters the irregular protrusion on the surface of the hard alloy head being tested, the protrusion position provides a reverse driving force to the universal ball 57, thereby causing the sliding seat 55 to move relatively backward in the feedback shell 53, so that the conductive block 510 contacts the protruding electrical connection strip 512, and also connects the power supply circuit of the adjustment motor 63, so that the adjustment motor 63 can operate. Moreover, when the degree of the irregular protrusion on the surface of the hard alloy head is greater, the pushing rod 522 on the other side of the synchronization block 59 also acts on the protruding adjustment seat 516, so that the protruding adjustment seat 516 drives the protruding feedback conductive contact 518 to slide a greater distance on the protruding feedback resistor rod 514, so that the access resistance of the protruding feedback resistor rod 514 is smaller, and the protruding feedback conductive contact 518 and the protruding feedback resistor rod 514 are also connected in series to the power supply circuit of the adjustment motor 63, which will also cause the adjustment motor 63 to rotate at a higher speed. The speed feedback conductive contact 66 works so that the sliding distance of the speed feedback resistor rod 65 is larger. After the universal ball 57 completes a circle of detection on the carbide head, the PLC controller 8 controls the stepper motor 41 and the regulating motor 63 to stop the action synchronously, so that the final position of the speed feedback conductive contact 66 on the speed feedback resistor rod 65 is confirmed. Specifically, when the degree of abnormality of the carbide head welding position is large, it means that there will be many changes of depression and protrusion at the carbide head welding position, which makes the regulating motor 63 put into work for a longer time. The larger the sliding distance of the speed feedback conductive contact 66 on the speed feedback resistor rod 65, and the greater the degree of depression and protrusion, the speed of the regulating motor 63 is correspondingly accelerated, and the sliding distance of the speed feedback conductive contact 66 on the speed feedback resistor rod 65 is further increased, so that the access resistance value of the speed feedback resistor rod 65 is larger;

[0046] The speed feedback conductive contact 66 and the speed feedback resistor rod 65 are connected in series to the power supply circuit of the chain conveyor 7. The chain conveyor 7 is a DC motor device. At this time, because the access resistance of the speed feedback resistor rod 65 increases, the power supply current of the chain conveyor 7 decreases, thereby slowing down the running speed of the chain conveyor 7, thereby reducing the welding speed of the pick. When the moving seat 64 drives the speed feedback to drive the contact to move a longer distance, the trigger round head 68 at the lower end of the moving seat 64 can press and act on the frequency switch 67 at the rear side. The frequency switch 67 at the rear side controls the high-frequency power supply 23 to work at a lower frequency. Changing the working frequency of the high-frequency power supply 23 can adjust its output power, thereby reducing the welding temperature of the pick.

[0047] It is additionally noted that when the welding speed is reduced, the self-rotation speed of the pick generated by the meshing of the transmission gear 34 and the transmission rack 35 will also be reduced, and the stable welding work can be completed synchronously.

[0048] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pick processing and welding device for a coal mining machine, comprising a base (1), a chain plate conveyor (7) being fixedly mounted on the upper end of the base (1), characterized in that: Also includes: An electromagnetic induction heating component (2) is fixedly mounted on the upper end of the base (1), and a heating end is arranged outside the upper end of the chain conveyor (7); A plurality of groups of supporting mechanisms (3) are evenly arranged on the chain conveyor (7); A rotating support mechanism (4) is fixedly mounted on the upper end of the base (1); A profile detection feedback mechanism (5) is fixedly mounted on the upper end of the base (1) and is arranged on one side of the rotating support mechanism (4); A welding speed and temperature automatic control mechanism (6) is fixedly mounted on the upper end of the base (1) and is electrically connected to the irregularity detection feedback mechanism (5); A PLC controller (8) is fixedly mounted on the upper end of the base (1) and is electrically connected to the electromagnetic induction heating assembly (2), the rotating support mechanism (4), the irregularity detection feedback mechanism (5) and the welding speed and temperature automatic control mechanism (6).

2. A pick processing and welding device for a coal mining machine according to claim 1, characterized in that: The electromagnetic induction heating component (2) comprises an L-shaped support plate (21) fixedly mounted on the upper end of the base (1), a heating element (22) fixedly mounted on the vertical side wall of the L-shaped support plate (21), a high-frequency power source (23) fixedly mounted on the upper end of the L-shaped support plate (21), and the high-frequency power source (23) is electrically connected to the heating element (22).

3. A pick processing and welding device for a coal mining machine according to claim 1, characterized in that: The supporting mechanism (3) comprises a transmission shaft (31) rotatably connected to the chain conveyor (7); one end of the transmission shaft (31) located outside the chain conveyor (7) is fixedly connected to a rotating plate (32); a side of the rotating plate (32) away from the transmission shaft (31) is symmetrically fixedly connected to a plurality of supporting rods (33); one end of the transmission shaft (31) located inside the chain conveyor (7) is fixedly connected to a transmission gear (34); the upper end of the base (1) is fixedly connected to a same transmission rack (35) via a plurality of extension rods; the transmission rack (35) is meshingly connected to the transmission gear (34); and the transmission rack (35) is horizontally arranged.

4. A pick processing and welding device for a coal mining machine according to claim 1, characterized in that: The rotating support mechanism (4) comprises a stepper motor (41) fixedly mounted on the upper end of the base (1); the upper output end of the stepper motor (41) is fixedly connected to a hollow support platform (42); a dual-axis motor (43) is fixedly mounted in the middle position of the hollow support platform (42); both output ends of the dual-axis motor (43) are fixedly connected to a rotating screw (44); one end of the rotating screw (44) away from the dual-axis motor (43) is rotatably connected to the inner wall of the hollow support platform (42) through a bearing; a clamping rod (45) of an L-shaped structure is threadedly sleeved on the rod wall of the rotating screw (44); a strip-shaped through-hole (46) for the upper end of the clamping rod (45) to extend through is provided at the upper end of the hollow support platform (42); and an arc-shaped clamping plate (47) is fixedly connected to the rod wall of the clamping rod (45).

5. A pick processing and welding device for a coal mining machine according to claim 1, characterized in that: The irregularity detection feedback mechanism (5) comprises a vertical plate (51) fixedly mounted on the upper end of the base (1); an electric push rod (52) is fixedly inserted into the upper side wall of the vertical plate (51); the movable end of the electric push rod (52) is fixedly connected to a feedback shell (53); a plurality of guide slide rods (54) arranged side by side are fixedly mounted inside the feedback shell (53); the plurality of guide slide rods (54) are externally slidably sleeved with a same sliding seat (55); a plurality of push-pull rods (56) are symmetrically fixedly connected to the front side of the sliding seat (55); the ends of the plurality of push-pull rods (56) away from the sliding seat (55) penetrate through and extend out of the feedback shell (53); The sliding seat (55) is fixedly connected with a universal ball (57); a side of the sliding seat (55) away from the push-pull rod (56) and the inner wall of the feedback shell (53) are fixedly provided with a plurality of compensation springs (58) sleeved outside the guide slide rod (54); the upper end of the sliding seat (55) is fixedly connected with a synchronization block (59); the upper end of the synchronization block (59) is fixedly provided with a conductive block (510); the top of the inner wall of the feedback shell (53) is fixedly provided with two recessed electrical connection strips (511) and a raised electrical connection strip (512) symmetrically arranged with respect to the conductive block (510); the inner upper side of the feedback shell (53) is also symmetrically fixedly provided with a recessed feedback resistor rod (513) and a A convex feedback resistor rod (514), a concave adjustment seat (515) and a convex adjustment seat (516) are respectively arranged on the upper sides of the opposite ends of the concave feedback resistor rod (513) and the convex feedback resistor rod (514), a concave feedback conductive contact piece (517) in electrical contact with the concave feedback resistor rod (513) is fixedly installed at the lower end of the concave adjustment seat (515), a convex feedback conductive contact piece (518) in electrical contact with the convex feedback resistor rod (514) is fixedly installed at the lower end of the convex adjustment seat (516), and the opposite ends of the concave feedback resistor rod (513) and the convex feedback resistor rod (514) are both fixedly connected with a side plate (519) A plurality of limit slide bars (520) are fixedly installed between the side plate (519) and the feedback shell (53); the side walls of the recessed adjustment seat (515) and the raised adjustment seat (516) are provided with a plurality of sliding holes slidably sleeved with the limit slide bars (520); the recessed adjustment seat (515) and the raised adjustment seat (516) are fixedly connected to the side plate (519) with a plurality of return springs (521) sleeved outside the limit slide bars (520); the upper ends of the synchronization block (59) are fixedly connected with push rods (522) on opposite sides; the side walls of the synchronization block (59) are provided with a rectangular opening (523) for the side plate (519) to penetrate and extend therethrough.

6. A pick processing and welding device for a coal mining machine according to claim 1, characterized in that: The welding speed and temperature automatic control mechanism (6) comprises a control shell (61) fixedly mounted on the upper end of the base (1); an adjusting screw (62) is rotatably connected to the upper side of the inner part of the control shell (61); an adjusting motor (63) for driving the adjusting screw (62) to rotate is fixedly mounted on the outer wall of the control shell (61); a moving seat (64) is threadedly sleeved on the rod wall of the adjusting screw (62); and a movable seat (64) is fixedly mounted on the inner part of the control shell (61) parallel to the adjusting screw (62). A speed feedback resistor rod (65) is arranged in a row, the side wall of the movable seat (64) is provided with a sleeve hole which is sleeved outside the speed feedback resistor rod (65), and the inner wall of the corresponding sleeve hole is fixedly connected with a speed feedback conductive contact piece (66) which is in electrical contact with the speed feedback resistor rod (65), a plurality of frequency switches (67) are fixedly installed at equal intervals on the bottom of the inner wall of the control shell (61), and a trigger round head (68) which is arranged corresponding to the position of the frequency switch (67) is fixedly installed at the lower end of the movable seat (64).

7. A pick processing and welding device for a coal mining machine according to claim 5, characterized in that: A confirmation switch (524) is fixedly mounted at the middle position of the bottom of the inner wall of the feedback housing (53), and a pressing round head (525) corresponding to the position of the confirmation switch (524) is fixedly mounted at the lower end of the sliding seat (55).

8. A pick processing and welding device for a coal mining machine according to claim 6, characterized in that: A limiting sliding block is fixedly mounted on the upper end of the movable seat (64), and a limiting sliding groove matching and slidingly connected with the limiting sliding block is provided on the top of the inner wall of the regulating shell (61).

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