A stable welding device for processing shield machine parts

Abstract

The present invention complies with the technical field of welding devices, and is particularly a stable welding device for processing shield machine parts. It comprises a fixed frame, the fixed frame is provided with symmetrically distributed fixed claws, the fixed frame is fixedly connected to a motor, the fixed frame is rotatably connected to a reciprocating screw, the reciprocating screw is threadedly connected to a moving frame, the moving frame is rotatably connected to a first electric push rod, the fixed frame is fixedly connected to an electric slide rail, the electric slide rail is provided with a slider, the slider is fixed to a base plate, the base plate is hinged with a symmetrically distributed arc frame, and the arc frame is slidably connected to a symmetrically distributed first positioning plate. The present invention moves and squeezes the outer side surface of the blade through four first positioning plates, so that the center line of the blade coincides with the axis of the shaft body, thereby avoiding the blade from shifting to one side, resulting in incomplete welding between the blade and the shaft body during welding, which affects the service life of the spiral shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices and mainly mentions a stable welding device for processing shield machine parts. Background Art

[0002] A shield machine is a tunnel boring machine that uses the shield method. During underground construction, the cutter head at the front of the shield machine is used to crush the underground rock and soil layers, and then the crushed rock and soil layers are transported to the ground through the screw machine on it. The shield screw shaft is an important part of the transportation. Since the blades used in the shield machine are relatively thick, it is not suitable to generate continuous integrated blades by extruding and bending steel plates. Therefore, when producing blades, most of them are produced in sections. First, individual blades are produced, and then the individual blades are welded to make continuous blades. In the process of producing blades, in order to facilitate the subsequent welding of the blades on the shaft body, the space in the middle of the blade will be larger than the diameter of the shaft body. Later, this gap will be filled during welding. However, in the actual process of laser welding the connection between the shaft body and the blade, due to the gap between the blade and the shaft body, it is difficult for the staff to locate the center of the blade, and it is easy for the blade to deflect during welding, which increases the gap between the blade and the shaft body, resulting in incomplete welding when welding the side with a large gap between the blade and the shaft body, affecting the overall welding quality of the screw shaft. Summary of the invention

[0003] The present invention provides a stable welding device for processing shield machine parts, in order to solve the problem that the gap between the blade and the shaft body makes it difficult to locate the center of the blade, and the gap between some blades and the shaft body is easily increased during welding, resulting in incomplete welding when welding the blades and the shaft body, affecting the overall welding quality of the spiral shaft.

[0004] The technical implementation scheme of the present invention is: a stable welding device for processing shield machine parts, including a fixed frame, the fixed frame is provided with symmetrically distributed fixing claws, the upper part of the fixed frame is fixedly connected to a motor, the fixed frame is rotatably connected to a reciprocating screw, the output shaft of the motor is fixedly connected to a frustum wheel, the reciprocating screw is provided with a sliding sleeve that cooperates with the frustum wheel for transmission, the reciprocating screw is threadedly connected to a moving frame that is slidably connected to the fixed frame, the moving frame is rotatably connected to a first electric push rod, the telescopic end of the first electric push rod is fixedly connected to a first elastic telescopic rod, and the fixed part of the first elastic telescopic rod is fixedly connected to There is a sliding frame, the sliding frame is slidably connected with a symmetrically distributed slide plate, the slide plate is provided with a welding gun, the lower part of the fixed frame is fixedly connected with an electric slide rail, the electric slide rail is provided with a slider, the slider is fixedly connected with a base plate, the base plate is hinged with a symmetrically distributed arc frame, an electric rotating shaft is provided between the arc frame and the base plate, the arc frame is slidably connected with a symmetrically distributed first positioning plate, a tension spring is provided between the first positioning plate and the adjacent arc frame, a positioning component for positioning the blade connection is provided on the movable frame, and an adjustment mechanism for detecting the inclination angle of the blade is provided on the first elastic telescopic rod.

[0005] Furthermore, the positioning assembly includes a ring, which is slidably connected to the movable frame, and the ring is rotatably connected to a second electric push rod, the telescopic end of the second electric push rod is fixedly connected to a second elastic telescopic rod, the fixed part of the second elastic telescopic rod is fixedly connected to a U-shaped frame, the telescopic end of the second elastic telescopic rod is fixedly connected to a connecting frame, the connecting frame is slidably connected to symmetrically distributed fixed plates, springs are arranged between the symmetrically distributed fixed plates, the fixed plates are extrusion-fitted with the U-shaped frames, and evenly distributed welding guns are arranged on the fixed plates.

[0006] Furthermore, the adjustment mechanism includes a bogie, which is fixed to the telescopic end of the first elastic telescopic rod, and the bogie is slidably connected to symmetrically distributed steering plates, and tension springs are arranged between the symmetrically distributed steering plates, and the steering plates are slidably connected to the adjacent slides, and the movable frame and the ring are jointly provided with a transmission assembly for adjusting the angles of adjacent welding guns.

[0007] Furthermore, the transmission assembly includes a symmetrically distributed adjustment frame, the symmetrically distributed adjustment frames are respectively fixed to the moving frame and the collar, the adjustment frame close to the first electric push rod is provided with a symmetrically distributed first sensor, and the adjustment frame close to the collar is slidably connected to the moving frame, the adjustment frame is slidably connected with a rack, springs are provided between the symmetrically distributed first sensors on the adjustment frame and the rack, the first electric push rod and the second electric push rod are both fixed with a gear ring, the gear ring is meshed with adjacent racks, a telescopic plate is fixed between the symmetrically distributed racks, a third electric push rod is fixed to the fixed portion of the telescopic plate, the symmetrically distributed first sensors on the adjustment frame are all electrically connected to the third electric push rod, the telescopic end of the third electric push rod is fixed to the telescopic portion of the telescopic plate, and a fixing mechanism for fixing adjacent blades is commonly provided on the symmetrically distributed arc frames.

[0008] The cam is connected to the second end of the second end of the second cam and the second end of the second cam is connected to the cam by a spring, and the cam is connected to the first end of the second cam and the second end of the second cam is connected to the cam by a spring.

[0009] Furthermore, the length of the second positioning plate is greater than the length of the first positioning plate.

[0010] Furthermore, the limit mechanism includes symmetrically distributed limit rods, which are symmetrically distributed and respectively slidably connected to adjacent slide grooves, a spring is arranged between the limit rod and the adjacent sealing plate, the symmetrically distributed limit rods are commonly fixedly connected to a limit shell, a fourth electric push rod is fixedly connected to the base plate, the symmetrically distributed first sensors on the adjustment frame are all electrically connected to the fourth electric push rod, the telescopic end of the fourth electric push rod is fixedly connected to a connecting plate, the end of the connecting plate away from the base plate is fixedly connected to an adjusting plate, an extrusion plate and a symmetrically distributed trapezoidal block are slidably connected in the limit shell, the trapezoidal block and the adjusting plate are both extruded and matched with the extrusion plate, a spring is arranged between the trapezoidal block and the limit shell, a positioning block is fixedly connected to the trapezoidal block, and the positioning block is extruded and matched with the electric slide rail.

[0011] Furthermore, the sum of the lengths of the connecting plate and the telescopic end of the fourth electric push rod is smaller than the length of the slide slot.

[0012] Furthermore, the extrusion plate is fixedly connected with symmetrically distributed reset frames, the reset frames are slidably connected to the limit shell, and the symmetrically distributed reset frames are all extrusion-matched with the bottom plate.

[0013] Furthermore, it also includes a speed changing mechanism, which is arranged on the fixed frame, and the speed changing mechanism is used to adjust the rotation speed of the reciprocating screw. The speed changing mechanism includes a third elastic telescopic rod, and the third elastic telescopic rod is fixed to the fixed frame. A second telescopic rod is fixed to a side of the fixed frame close to the motor, and a fixed portion of the third elastic telescopic rod is connected to a fixed portion of the second telescopic rod. An adjusting ring is fixed to the telescopic end of the second telescopic rod, and the adjusting ring is rotatably connected to the sliding sleeve, and the sliding sleeve is spline-connected to the reciprocating screw.

[0014] The beneficial effects of the present invention are as follows: 1. When welding blades, the present invention drives four first positioning plates to move and squeeze the outer side surfaces of the blades through two arc frames, and positions the blades from four directions so that the center lines of the blades coincide with the axis lines of the shaft body, thereby avoiding that after the blades deviate to one side, the gap between the other side of the blades and the shaft body increases, resulting in incomplete welding between the blades and the shaft body during the welding process, thereby affecting the service life of the spiral shaft.

[0015] 2. When welding blades, the present invention positions the blades being welded by four first positioning plates, thereby increasing the stability of the spiral shaft during welding and preventing the blades from shaking during welding, causing the blades to be skewed and affecting the quality of the spiral shaft after processing.

[0016] 3. When welding blades, the present invention detects the direction of impeller deviation through two steering plates, thereby adjusting the direction of the slide plate. The direction of the welding gun on the slide plate is perpendicular to the weld on the shaft, and the distances between the welding guns on the two slide plates and the weld on the shaft are made the same, avoiding an angle between the welding gun and the impeller, resulting in different distances between the welding guns and the weld on both sides, affecting the strength of the weld.

[0017] 4. When welding shafts of different diameters, the present invention detects the diameter of the shaft through the third elastic telescopic rod, and drives the second telescopic rod to move the adjustment ring to change the transmission ratio between the sleeve and the conical wheel on the motor, so as to avoid the situation where the reciprocating screw speed remains unchanged after the diameter of the shaft increases, resulting in a short welding time at the connection and affecting the welding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the arc frame, U-shaped frame and limiting shell of the present invention;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the arc frame, the first positioning plate and the adjustment plate of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the bottom plate, the arc frame and the first positioning plate of the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the U-shaped frame, the connecting frame and the fixing plate of the present invention;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the adjustment frame, rack and telescopic plate of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the gear ring, the telescopic plate and the third electric push rod of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the first telescopic rod, the U-shaped plate and the rotating frame of the present invention;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the arc frame, the rotating frame and the second positioning plate of the present invention;

[0027] Fig.10 It is a three-dimensional structural schematic diagram of the limiting rod, limiting shell and positioning block of the present invention;

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of the connecting plate, the adjusting plate and the extruding plate of the present invention;

[0029] Fig.12It is a schematic diagram of the three-dimensional structure of the sliding sleeve, the second telescopic rod and the adjusting ring of the present invention;

[0030] Fig.13 It is a three-dimensional structural schematic diagram of the reciprocating screw, the sliding sleeve and the adjusting ring of the present invention.

[0031] The meaning of the marks in the figure: 1-fixed frame, 2-fixed claw, 3-motor, 4-reciprocating screw, 5-sliding sleeve, 6-moving frame, 7-first electric push rod, 8-first elastic telescopic rod, 9-sliding frame, 901-slide plate, 10-electric slide rail, 11-bottom plate, 12-arc frame, 13-first positioning plate, 21-ring, 22-second electric push rod, 23-second elastic telescopic rod, 24-U-shaped frame, 25-connecting frame, 26-fixed plate, 31-steering frame, 32-steering plate, 41- Adjusting frame, 42- rack, 43- gear ring, 44- telescopic plate, 45- third electric push rod, 51- first telescopic rod, 52- U-shaped plate, 53- rotating frame, 54- second positioning plate, 55- slide groove, 56- sealing plate, 61- limiting rod, 62- limiting shell, 63- fourth electric push rod, 64- connecting plate, 65- adjusting plate, 66- extrusion plate, 67- trapezoidal block, 68- positioning block, 71- reset frame, 81- third elastic telescopic rod, 82- second telescopic rod, 83- adjusting ring. DETAILED DESCRIPTION

[0032] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] The blades used in the shield spiral shaft are relatively thick and are not suitable for generating continuous blades by extruding and bending steel plates. Therefore, the blades are mostly produced in sections, and then the individual blades are welded to make continuous blades. In order to facilitate the subsequent welding of the blades on the shaft, the space in the middle of the blade will be larger than the diameter of the shaft. This gap will be filled during welding. However, in the actual process of laser welding the connection between the shaft and the blades, due to the gap between the blades and the shaft, the staff lacks a reference point when locating the center line of the blade, and the blades are prone to deflect to one side, resulting in a partial increase in the gap between the blade and the shaft, which leads to incomplete welding when welding the side with a larger gap between the blade and the shaft, affecting the overall welding quality of the spiral shaft.

[0034] Embodiment 1: A stable welding device for processing shield machine parts, such as Figure 1-Figure 6As shown, it includes a fixing frame 1, on which are arranged two fixing claws 2 symmetrically distributed on the left and right (the fixing claws 2 can be any type of existing fixing devices, and will not be described in detail), the fixing claws 2 are used to fix the shaft body of the screw shaft, and the fixing claws 2 can rotate by themselves. After the shaft body is fixed, the axis of the fixing claws 2 coincides with the axis of the shaft body, a motor 3 is fixedly connected to the upper part of the left side of the fixing frame 1, a reciprocating screw 4 is rotatably connected to the fixing frame 1, a sleeve 5 is arranged on the left side of the reciprocating screw 4, a frustum wheel is fixedly connected to the output shaft of the motor 3, the frustum wheel is matched with the sleeve 5 for transmission, and the reciprocating screw 4 is threadedly connected to a moving frame 6, A slide groove is provided on the upper part of the fixed frame 1, and the mobile frame 6 slides in the adjacent slide groove on the fixed frame 1. The slide groove is used to guide the mobile frame 6 when it moves to prevent the reciprocating screw 4 from driving the mobile frame 6 to rotate, which makes the mobile frame 6 unable to move. The left part of the lower side of the mobile frame 6 is rotatably connected to the first electric push rod 7, and the telescopic end of the first electric push rod 7 is fixedly connected to the first elastic telescopic rod 8. The fixed part of the first elastic telescopic rod 8 is fixedly connected to the sliding frame 9. The sliding frame 9 is slidably connected to two slide plates 901 distributed symmetrically on the left and right. A welding gun is provided on the slide plate 901. The gun head of the welding gun deflects toward the center line direction of the sliding frame 9. The welding gun passes through the laser Welding is performed, an electric slide rail 10 is fixedly connected to the lower part of the fixed frame 1, a slider is arranged on the electric slide rail 10, a bottom plate 11 is fixedly connected to the upper side of the slider, two arc frames 12 symmetrically distributed front and back are hinged on the bottom plate 11, an electric rotating shaft is arranged between the arc frame 12 and the bottom plate 11, initially, the two arc frames 12 are in an open state, which is convenient for the staff to place the shaft body and the blade, after the two arc frames 12 rotate, the axis of the arc frame 12 coincides with the axis of the fixed claw 2, the electric rotating shaft is used to fix the position of the blade, and the two arc frames 12 are slidably connected to the opposite sides with two first positioning plates 1 symmetrically distributed up and down. 3. A tension spring is arranged between the first positioning plate 13 and the adjacent arc frame 12. The tension spring is used to adapt to blades of different diameters. When fixing the blade, the blade is fixed from four directions by four first positioning plates 13, so that the blade is coaxial with the shaft body, and the stability of the spiral shaft during welding is increased to avoid the increase of the gap between the other side of the blade and the shaft body after the blade deviates to one side, resulting in incomplete welding between the blade and the shaft body during welding, affecting the service life of the spiral shaft. A positioning component for positioning the blade connection is arranged on the mobile frame 6, and an adjustment mechanism for detecting the inclination angle of the blade is arranged on the first elastic telescopic rod 8.

[0035] like Figure 2 , Figure 4 and Figure 7As shown, the positioning assembly includes a collar 21, a slide groove is provided at the right part of the lower side of the moving frame 6, the collar 21 slides in the slide groove at the lower side of the moving frame 6, the slide groove is used to make the collar 21 adapt to the length of the blade, the collar 21 is rotatably connected to the second electric push rod 22, the telescopic end of the second electric push rod 22 is fixedly connected to the second elastic telescopic rod 23, the lower part of the fixed part of the second elastic telescopic rod 23 is fixedly connected to a U-shaped frame 24, the lower part of the U-shaped frame 24 is provided with two inclined surfaces symmetrically distributed on the left and right, the telescopic end of the second elastic telescopic rod 23 is fixedly connected to a connecting frame 25, the lower part of the connecting frame 25 is provided with a slide groove, and the slide groove of the connecting frame 25 is slidably connected There are two fixed plates 26 symmetrically distributed on the left and right, and the two fixed plates 26 are used to fix the connection between two adjacent blades. A spring is arranged between the two fixed plates 26, and the spring is used to push the two fixed plates 26 to reset. The fixed plates 26 are squeezed and matched with the adjacent inclined surfaces on the U-shaped frame 24. When the U-shaped frame 24 moves downward, the inclined surfaces on the U-shaped frame 24 squeeze the adjacent fixed plates 26, so that the two fixed plates 26 are close to each other. Evenly distributed welding guns are arranged on the fixed plates 26, and the welding guns are used to weld the connection between the two blades, so that during the welding process, the next blade can be fixed in advance, so that the device can be more continuous when welding blades.

[0036] like Figure 5 and Figure 6 As shown, the adjustment mechanism includes a bogie 31, which is fixed to the telescopic end of the first elastic telescopic rod 8, and a slide groove is arranged at the lower part of the bogie 31, and two steering plates 32 symmetrically distributed on the left and right are slidably connected in the slide groove of the bogie 31, and a tension spring is arranged between the two steering plates 32, and the tension spring is used to drive the steering plate 32 to reset. When the bogie 31 moves downward, the steering plate 32 is used to locate the inclination angle of the blade, and drive the welding gun to rotate through the first elastic telescopic rod 8, so that the welding gun is perpendicular to the connection between the blade and the shaft body, avoiding the angle between the direction of the welding gun and the blade, resulting in different distances between the two welding guns and the connection, resulting in insufficient strength of the connection between the shaft body and the blade after welding, and the slide plate 901 is provided with a slide groove, and the steering plate 32 is located in the slide groove of the adjacent slide plate 901 and slides, so as to increase the descending distance of the slide plate 901 to adapt to blades of different heights, and the moving frame 6 and the collar 21 are jointly provided with a transmission component for adjusting the angle of its adjacent welding gun.

[0037] like Figure 6 and Figure 7As shown, the transmission assembly includes two adjustment frames 41 symmetrically distributed on the left and right sides. The adjustment frame 41 on the left side is fixedly connected to the left part of the mobile frame 6, and the adjustment frame 41 on the right side is fixedly connected to the left part of the upper side of the collar 21. Two first sensors symmetrically distributed front and back are arranged on the left adjustment frame 41. The adjustment frame 41 on the right side is slidably connected to the mobile frame 6 to prevent the collar 21 from rotating in the slide groove of the mobile frame 6. The adjustment frame 41 is slidably connected to a rack 42. Springs are arranged between the rack 42 and the two first sensors in the adjacent adjustment frames 41. The first sensor is a pressure sensor, which is used to detect the extrusion force exerted on the adjacent springs. The upper part of the first electric push rod 7 and the upper part of the second electric push rod 22 are both fixedly connected. The gear ring 43 is meshed with the adjacent rack 42, and drives the adjacent gear ring 43 to rotate when the rack 42 moves. A telescopic plate 44 is fixedly connected between the two racks 42, and a third electric push rod 45 is fixedly connected to the upper side of the fixed part of the telescopic plate 44. The telescopic end of the third electric push rod 45 is fixedly connected to the telescopic part of the telescopic plate 44. The two first sensors on the left adjustment frame 41 are electrically connected to the third electric push rod 45. The telescopic end of the third electric push rod 45 adjusts the extension distance of the telescopic end according to the pressure applied to the first sensor, thereby pushing the ring 21 to move rightward through the telescopic part of the telescopic plate 44, thereby adapting to the length of the blade. The two arc frames 12 are jointly provided with a fixing mechanism for fixing adjacent blades.

[0038] like Figure 3 , Figure 8 and Fig. 9As shown, the fixing mechanism includes four first telescopic rods 51 distributed in the circumferential direction, and the four first telescopic rods 51 are respectively fixed to adjacent arc frames 12, and two first telescopic rods 51 are fixed to each arc frame 12, and the first telescopic rods 51 on the arc frame 12 are symmetrically distributed up and down, and the telescopic end of the first telescopic rod 51 is fixed with a U-shaped plate 52, and the right side of the arc frame 12 is hinged with two rotating frames 53 symmetrically distributed up and down, and a torsion spring is arranged between the rotating frame 53 and the adjacent arc frame 12, and the rotating frame 53 is pressed and matched with the adjacent U-shaped plate 52. When the U-shaped plate 52 moves to the right, the U-shaped plate 52 presses the adjacent rotating frame 53, so that the rotating frame 53 rotates toward the center line of the shaft body, and the inner side of the rotating frame 53 is slidably connected with a second positioning plate 54, and the length of the second positioning plate 54 is greater than the length of the first positioning plate 13, so that the second positioning plate 54 can completely fix the next blade To avoid incomplete fixation when fixing the next blade, resulting in uneven force on the blade, causing the blade to still be deflected after fixation, a tension spring is arranged between the second positioning plate 54 and the adjacent rotating frame 53, and two slide grooves 55 symmetrically distributed front and back are arranged on the right side of the bottom plate 11, and a sealing plate 56 is slidably connected to the left side of the slide groove 55, and the sealing plate 56 and the left part of the adjacent slide groove 55 form a sealed cavity, and the cavity is filled with compressible gas, and a spring is arranged between the sealing plate 56 and the bottom plate 11, and a second sensor is arranged on the left part of the slide groove 55, and the second sensor is a pressure sensor, and the second sensor is used to detect the pressure in the chamber of the left part of the slide groove 55. The two second sensors are electrically connected to the second electric push rod 22. When the pressure on the second sensor increases, the telescopic end of the second electric push rod 22 extends again, and a limiting mechanism for pushing the sealing plate 56 to move is arranged on the bottom plate 11.

[0039] like Figure 3 , Figure 8 , Fig.10 and Fig.11As shown, the limiting mechanism includes two limiting rods 61 symmetrically distributed front and back, the two limiting rods 61 are respectively slidably connected in adjacent slide grooves 55, a spring is arranged between the limiting rod 61 and the adjacent sealing plate 56, the spring is always in a compressed state, the two limiting rods 61 are commonly fixedly connected to the limiting shell 62, a fourth electric push rod 63 is fixedly connected to the bottom plate 11, the two first sensors on the left adjustment frame 41 are electrically connected to the fourth electric push rod 63, after the pressure on the first sensor increases, the telescopic end of the fourth electric push rod 63 extends a specified distance, the telescopic end of the fourth electric push rod 63 is fixedly connected to a connecting plate 64, the sum of the lengths of the connecting plate 64 and the telescopic end of the fourth electric push rod 63 is less than the slide groove 55, which is used to make the spring between the limit rod 61 and the adjacent sealing plate 56 always in a compressed state. The right end of the connecting plate 64 is fixedly connected to the adjusting plate 65. The limit shell 62 is slidably connected with an extrusion plate 66 and two trapezoidal blocks 67 symmetrically distributed front and back. The front side of the extrusion plate 66 is provided with an inclined surface, and the upper side of the trapezoidal block 67 is provided with an inclined surface. A spring is provided between the trapezoidal block 67 and the limit shell 62. The trapezoidal block 67 is fixedly connected to a positioning block 68, and the positioning block 68 is extruded and matched with the electric slide rail 10. When the limit shell 62 moves to the right, the adjusting plate 65 squeezes the extrusion plate 66 to the left, so that the extrusion plate 66 squeezes the two trapezoidal blocks 67 downward, thereby moving the positioning block 68 downward to fix the limit shell 62.

[0040] like Fig.11 As shown, the extrusion plate 66 is fixedly connected with two reset frames 71 symmetrically distributed front and back, and the limiting shell 62 is provided with two slide grooves symmetrically distributed front and back. The reset frames 71 are located on the limiting shell 62 and slide in adjacent slide grooves. The two reset frames 71 are both squeezed and matched with the bottom plate 11. When the bottom plate 11 squeezes the reset frames 71 to the right, the reset frames 71 drive the extrusion plate 66 to move to the right, so that the extrusion plate 66 is separated from the two trapezoidal blocks 67, so that the trapezoidal blocks 67 move upward to release the limit on the limiting shell 62.

[0041] When the worker uses the device to weld the blades of the spiral shaft of the shield machine, the worker places the shaft body on the device, and then the worker starts the two fixing claws 2 to fix the shaft body (the fixing claws 2 have an existing fixing device and are not described in detail), and then the worker places the blade to be welded on the shaft body (refer to Figure 1 , so that the connection points between adjacent blades are facing upward) so that the left and right ends of the blade are connected to the adjacent blades respectively. After the blade is placed (taking the downward displacement of the blade as an example, the centerline axis of the blade does not coincide with the central axis of the shaft body at this time), the staff starts the electric slide rail 10 to drive the parts thereon to move to the right. In the process of the arc frame 12 moving to the right (taking the front arc frame 12 and the parts thereon as an example), the staff starts the electric rotating shaft on the arc frame 12, and the arc frame 12 drives the parts thereon to rotate toward the direction of the shaft body under the action of the adjacent electric rotating shaft.

[0042] During the rotation of the above-mentioned arc frame 12, due to the downward deflection of the blade, during the rotation of the arc frame 12, the lower first positioning plate 13 on the arc frame 12 first contacts the blade, and as the arc frame 12 continues to rotate, the lower first positioning plate 13 on the arc frame 12 pushes the blade upward. During the upward movement of the blade, after the lower part of the blade contacts the shaft body, the first positioning plate 13 no longer moves upward. With the rotation of the adjacent arc frame 12, the tension spring on the lower first positioning plate 13 is stretched. When the upper first positioning plate 13 contacts the blade, the upper first positioning plate 13 squeezes the blade downward again. At this time, the tension spring adjacent to the upper first positioning plate 13 is stretched, and when the axis of the arc frame 12 coincides with the axis of the fixed claw 2, the arc frame 12 no longer rotates, and the staff turns off the electric slide rail 10 and the electric rotating shaft on the arc frame 12. At this time, the center line of the blade coincides with the axis of the shaft body and no longer moves, thereby positioning the position of the blade, making the blade coaxial with the shaft body, and avoiding the deflection of the blade affecting the quality of the spiral shaft welding.

[0043] After the arc frame 12 stops moving, the staff starts the first electric push rod 7, and the telescopic end of the first electric push rod 7 drives the parts thereon to move downward. During the downward movement of the two steering plates 32, when the steering plates 32 contact the upper part of the blades, the blades squeeze the two steering plates 32, and the two steering plates 32 drive the steering frame 31 to rotate counterclockwise ( Figure 1 When the first electric push rod 7 is in the state of being tilted, the first electric push rod 7 is in the state of being tilted, and the first electric push rod 7 is in the state of being tilted.

[0044] After the welding gun stops moving to the left and right sides, the telescopic end of the first electric push rod 7 continues to move downward. When the bogie 31 contacts the upper part of the blade, the bogie 31 stops moving downward, and the fixed part of the first elastic telescopic rod 8 continues to move downward, and the telescopic end of the first elastic telescopic rod 8 is retracted to adapt to blades of different heights, thereby improving the applicability of the device. When the welding gun on the sliding frame 9 approaches the surface of the shaft body, the staff closes the first electric push rod 7 to complete the fixation of the welding gun position.

[0045] During the rotation of the first electric push rod 7, the first electric push rod 7 drives the adjacent gear ring 43 to rotate counterclockwise, and the gear ring 43 drives the adjacent rack 42 to move forward. The rack 42 moves forward to compress the spring on the front side of the adjacent adjustment frame 41, so that the pressure on the first sensor on the front side of the left adjustment frame 41 increases, and the first sensor transmits a signal to the third electric push rod 45. The telescopic end of the third electric push rod 45 moves a specified distance to the right according to the magnitude of the pressure on the first sensor. The telescopic end of the third electric push rod 45 drives the telescopic portion of the telescopic plate 44 to move right, and the telescopic portion of the telescopic plate 44 drives the right side The adjusting frame 41 moves to the right, and the adjusting frame 41 drives the parts thereon to move to the right, so that the distance between the first electric push rod 7 and the second electric push rod 22 is the length of a blade. During this process, the rack 42 on the left drives the rack 42 on the right to move forward through the telescopic plate 44, and the rack 42 on the right drives the second electric push rod 22 to rotate through the adjacent gear ring 43, so that the telescopic end of the second electric push rod 22 drives the parts thereon to rotate. After the first electric push rod 7 stops rotating, the second electric push rod 22 and the parts thereon stop rotating and stop moving to the right. At this time, the two fixed plates 26 are parallel to the slide plate 901.

[0046] During the movement of the telescopic end of the third electric push rod 45, the first sensor on the left adjustment frame 41 transmits a signal to the fourth electric push rod 63, so that the telescopic end of the fourth electric push rod 63 drives the adjustment plate 65 to move a specified distance to the right through the connecting plate 64. After the adjustment plate 65 stops moving, the staff pushes the two reset frames 71 to the right, and the reset frame 71 drives the extrusion plate 66 to move to the right. When the plane on the lower side of the extrusion plate 66 is separated from the plane on the trapezoidal block 67, the extrusion force of the extrusion plate 66 on the trapezoidal block 67 is reduced. The extrusion plate 66 drives the adjacent positioning block 68 to move upward under the push of the adjacent spring to release the limit on the limit shell 62. The two limit rods 61 drive the limit shell 62 and the parts thereon to move to the right under the push of the adjacent springs. When the right side surface of the extrusion plate 66 contacts the limit shell 62, the staff stops pushing the reset frame 71, the extrusion plate 66 stops moving to the right and separates from the trapezoidal block 67, and the trapezoidal block 67 and the parts thereon are no longer facing upward.

[0047] In the process of the above-mentioned limit shell 62 moving to the right, after the right side of the extrusion plate 66 contacts the adjustment plate 65, the extrusion plate 66 no longer moves to the right, so that the extrusion plate 66 and the parts thereon move to the left relative to the limit shell 62 and squeeze the two trapezoidal blocks 67 downward again, and the trapezoidal blocks 67 drive the adjacent positioning blocks 68 to move downward and compress the adjacent springs. When the positioning blocks 68 contact the electric slide rail 10 again, the positioning blocks 68 no longer move downward and limit the limit shell 62 again, so that the distance between the bottom plate 11 and the limit shell 62 is the length of a single blade.

[0048] After the above-mentioned limit shell 62 stops moving, the staff starts the second electric push rod 22, and the telescopic end of the second electric push rod 22 drives the parts thereon to move downward. When the lower part of the fixed plate 26 contacts the shaft, the fixed plate 26 stops moving, and the staff closes the second electric push rod 22, thus completing the adjustment of the device.

[0049] After the above-mentioned staff completes the debugging of the device, the staff starts the motor 3 and the electric slide rail 10. The output shaft of the motor 3 drives the reciprocating screw 4 to rotate through the conical wheel and the sliding sleeve 5, so that the reciprocating screw 4 drives the movable frame 6 and the parts thereon to move to the right. The staff adjusts the speed of the movement of the slider on the electric slide rail 10 so that the bottom plate 11 and the movable frame 6 keep moving to the right at the same speed, thereby ensuring that the blades in the welding state are in a fixed state, so that the blades are stably welded on the shaft body. When the staff starts the motor 3, the staff simultaneously starts the two fixed claws 2 and the welding guns on the two slide plates 901. The two fixed claws 2 drive the shaft body and the blades to rotate, so that the welding guns on the two slide plates 901 weld the connection between the blades and the shaft body. In the process of the bottom plate 11 moving to the right, the limit rod 61 gradually enters the adjacent slide groove 55 on the bottom plate 11 and compresses the spring between it and the adjacent sealing plate 56. When the spring cannot be compressed, the limit rod 61 squeezes the adjacent sealing plate 56 through the spring, causing the sealing plate 56 to move leftward relative to the bottom plate 11 and compress its adjacent spring, so that the gas in the cavity formed by the sealing plate 56 and the adjacent slide groove 55 is compressed, and the gas enters the fixed part of the two adjacent first telescopic rods 51 through the hose, and the telescopic end of the first telescopic rod 51 drives the adjacent U-shaped plate 52 to move rightward. When the right part of the U-shaped plate 52 contacts the adjacent rotating frame 53, the U-shaped plate 52 squeezes the adjacent rotating frame 53, so that the rotating frame 53 drives the parts thereon to rotate toward the axial direction of the shaft body and accumulates force for its adjacent torsion spring. When the second positioning plate 54 contacts the next blade to be welded, the second positioning plate 54 repeats the similar process of the first positioning plate 13 to complete the positioning of the next blade. When the inner side surface of the U-shaped plate 52 is in contact with the outer side surface of the adjacent rotating frame 53, the telescopic end of the first telescopic rod 51 no longer moves to the right, and the rotating frame 53 stops rotating and completes the positioning of the next blade.

[0050] After the telescopic end of the first telescopic rod 51 stops moving, the gas between the slide groove 55 and the adjacent sealing plate 56 continues to be compressed. At this time, the pressure on the second sensor in the slide groove 55 increases, and the second sensor transmits a signal to the second electric push rod 22. The telescopic end of the second electric push rod 22 drives the parts thereon to move downward, and the fixed part of the second elastic telescopic rod 23 drives the U-shaped frame 24 to move downward and gradually retract its telescopic end. The inclined surface at the bottom of the U-shaped frame 24 squeezes the adjacent fixed plate 26, so that the two fixed plates 26 are close to each other and compress the adjacent springs. In the process of the movement of the fixed plate 26, if the connection between the two blades When the two blades are not aligned (taking the next blade offset to the left as an example), after the fixed plate 26 on the left contacts the next blade, the fixed plate 26 on the left pushes the blade to move to the right. When the two fixed plates 26 are in contact with the connection between the two blades, the connection between the two blades is aligned. The staff starts the welding gun on the fixed plate 26 to weld the connection between the two blades to avoid misalignment of the connection between the two blades when welding the connection between the two blades, which increases the resistance of the spiral shaft when conveying materials, accelerates the wear of the spiral shaft, and affects the service life of the spiral shaft. After welding is completed, the staff closes the welding gun on the fixed plate 26.

[0051] As the base plate 11 continues to move to the right, when the two reset frames 71 contact the base plate 11, the base plate 11 pushes the reset frame 71 to the right, and the reset frame 71 moves to the right and repeats the above process to release the limit on the trapezoidal block 67, so that the positioning block 68 releases the limit on the limit shell 62, and the limit shell 62 moves to the right again under the push of the two limit rods 61. In this process, the sealing plate 56 moves to the right, reducing the cavity pressure between it and the adjacent slide groove 55 and collecting the gas in the fixed parts of the two adjacent first telescopic rods 51, so that the U-shaped plate 52 moves to the left and resets, and the rotating frame 53 rotates in the opposite direction and resets under the drive of the adjacent torsion springs. The pressure on the second sensor in the slide groove 55 is reduced, and a signal is transmitted to the second electric push rod 22. The telescopic end of the second electric push rod 22 drives the parts thereon to move in the opposite direction and reset, so that the U-shaped frame 24 is separated from the two fixed plates 26, so that the two fixed plates 26 are separated from each other, and then the device repeats the above process to weld the connection between the subsequent two blades.

[0052] After the welding of the shaft body is completed, the staff turns off the welding gun, motor 3 and electric slide rail 10 on the slide plate 901, and starts the electric shafts on the two arc frames 12 again, so that the arc frames 12 drive the parts thereon to rotate in the opposite direction and reset, and the squeezing force of the first positioning plate 13 on the blade is reduced, and the first positioning plate 13 moves and resets under the action of the adjacent tension spring. When the first positioning plate 13 is separated from the blade, the first positioning plate 13 completes the reset, and the staff turns off the electric shafts on the two arc frames 12, and then the staff closes the fixing claw 2 to take out the spiral shaft, and then the staff The operator starts the first electric push rod 7 and the second electric push rod 22, and the telescopic end of the second electric push rod 22 drives the parts thereon to move upward and reset. In this process, the fixed part of the second elastic telescopic rod 23 drives the parts thereon to move upward, so that the telescopic end of the second elastic telescopic rod 23 extends out and resets, and the squeezing force of the lower inclined surface of the U-shaped frame 24 on the two fixed plates 26 is reduced. The two fixed plates 26 move away from each other and reset under the push of adjacent springs. When the inclined surface of the lower part of the U-shaped frame 24 separates from the two fixed plates 26, the telescopic end of the second elastic telescopic rod 23 completes the reset. The parts thereon move upward with the telescopic end of the second electric push rod 22. After the telescopic end of the second electric push rod 22 is fully retracted, the staff closes the second electric push rod 22, and the telescopic end of the first electric push rod 7 moves upward to make the fixed part of the first elastic telescopic rod 8 move upward and reset. When the telescopic end of the first elastic telescopic rod 8 is fully extended, the first elastic telescopic rod 8 drives the two steering plates 32 to move upward through the steering rack 31. When the steering plate 32 is separated from the blade, the tension spring between the two steering plates 32 pulls it to reset and drives the slide plate 901 to move and reset. During the process, the springs on the front sides of the two adjustment frames 41 push the adjacent racks 42 to move backward, so that the racks 42 drive the adjacent gear rings 43 to rotate clockwise, and the two gear rings 43 respectively drive the first electric push rod 7 and the second electric push rod 22 to rotate and reset. After the rack 42 stops moving, the staff starts the motor 3 and the electric slide rail 10, so that the reciprocating screw 4 drives the moving frame 6 and the parts thereon to move to the left and reset, and the slider on the electric slide rail 10 drives the bottom plate 11 and the parts thereon to move to the left and reset. Then the staff repeats the above process to weld other shafts and blades.

[0053] In this embodiment, the reciprocating screw 4 and the sliding sleeve 5 are fixedly connected. In the next embodiment, the reciprocating screw 4 and the sliding sleeve 5 are spline connected.

[0054] Embodiment 2: Based on embodiment 1, Fig.12 and Fig.13As shown, a speed change mechanism is also included, which is arranged on the fixed frame 1. The speed change mechanism is used to adjust the rotation speed of the reciprocating screw 4. The speed change mechanism includes a third elastic telescopic rod 81, which is fixed to the lower part of the left side of the fixed frame 1, and a second telescopic rod 82 is fixed to the upper part of the left side of the fixed frame 1. The fixed part of the third elastic telescopic rod 81 is connected to the fixed part of the second telescopic rod 82. The fixed part of the third elastic telescopic rod 81 and the fixed part of the second telescopic rod 82 are both filled with hydraulic oil. An adjusting ring 83 is fixedly connected to the telescopic end, and the adjusting ring 83 is rotatably connected to the sleeve 5. The sleeve 5 is spline-connected to the reciprocating screw 4. When the shaft body is placed, by detecting the compression distance of the telescopic end of the third elastic telescopic rod 81, the telescopic end of the second telescopic rod 82 pushes the sleeve 5 to move through the adjusting ring 83, thereby adjusting the transmission ratio between the sleeve 5 and the conical wheel of the motor 3. When the sleeve 5 moves to the left, the transmission ratio between the sleeve 5 and the conical wheel of the motor 3 decreases. When the sleeve 5 moves to the right, the transmission ratio between the sleeve 5 and the conical wheel of the motor 3 increases.

[0055] When welding shafts of different diameters, as the diameter of the shaft increases, the path required for welding per unit length of the shaft increases, while the speed of the welding gun remains unchanged, which makes the speed of the welding gun relative to the shaft faster, resulting in a short welding time at the shaft connection, affecting the strength of the welding. To avoid the above problems, the specific operations are as follows:

[0056] When welding different shafts (taking the increase in the diameter of the shaft as an example), in the process of fixing the shaft by the above-mentioned fixed claw 2, the shaft squeezes the telescopic end of the third elastic telescopic rod 81 downward, and the hydraulic oil in the third elastic telescopic rod 81 enters the fixed part of the second telescopic rod 82, so that the telescopic end of the second telescopic rod 82 drives the adjusting ring 83 to move to the left, and the adjusting ring 83 drives the sliding sleeve 5 to move to the left, so that the transmission ratio between the sliding sleeve 5 and the conical wheel on the motor 3 is reduced, thereby reducing the rotation speed of the reciprocating screw 4, and reducing the movement speed of the welding gun on the slide plate 901, so as to avoid that after the diameter of the shaft increases, the path required for welding within the unit length of the shaft increases, while the rotation speed of the reciprocating screw 4 remains unchanged, resulting in a relatively faster welding gun speed, a short welding time at the connection, and affecting the strength of the welding. After that, the staff repeats the above process to start the motor 3 and the electric slide rail 10 to weld the shaft.

[0057] After the above-mentioned shaft body is taken out, the squeezing force of the shaft body on the telescopic end of the third elastic telescopic rod 81 is reduced, and the telescopic end of the third elastic telescopic rod 81 moves upward, thereby reducing the pressure in its fixed part and collecting the hydraulic oil in the fixed part of the second telescopic rod 82. The telescopic end of the second telescopic rod 82 drives the sliding sleeve 5 to move rightward through the adjusting ring 83, so that the transmission ratio between the sliding sleeve 5 and the frustum wheel is restored. When the telescopic end of the third elastic telescopic rod 81 stops moving, the sliding sleeve 5 completes the reset and stops moving.

[0058] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the invention as defined in the claims.

Claims

1. A stable welding device for processing shield machine parts, comprising a fixed frame (1), the fixed frame (1) is provided with symmetrically distributed fixed claws (2), the upper part of the fixed frame (1) is fixedly connected to a motor (3), the fixed frame (1) is rotatably connected to a reciprocating screw (4), the output shaft of the motor (3) is fixedly connected to a cone wheel, the reciprocating screw (4) is provided with a sliding sleeve (5) for transmission cooperation with the cone wheel, the reciprocating screw (4) is threadedly connected to a moving frame (6) slidably connected to the fixed frame (1), the moving frame (6) is rotatably connected to a first electric push rod (7), the telescopic end of the first electric push rod (7) is fixedly connected to a first elastic telescopic rod (8), the fixed part of the first elastic telescopic rod (8) is fixedly connected to a sliding frame (9), the sliding frame (9) is slidably connected to a symmetrically distributed slide plate (901), and a welding gun is arranged on the slide plate (901), wherein: It also includes an electric slide rail (10), the electric slide rail (10) is fixedly connected to the lower part of the fixed frame (1), a slider is arranged on the electric slide rail (10), the slider is fixedly connected to a bottom plate (11), the bottom plate (11) is hinged with symmetrically distributed arc frames (12), an electric rotating shaft is arranged between the arc frames (12) and the bottom plate (11), the arc frames (12) are slidably connected with symmetrically distributed first positioning plates (13), a tension spring is arranged between the first positioning plates (13) and the adjacent arc frames (12), a positioning component for positioning the blade connection is arranged on the mobile frame (6), and an adjustment mechanism for detecting the blade tilt angle is arranged on the first elastic telescopic rod (8); The positioning assembly comprises a collar (21), the collar (21) being slidably connected to the movable frame (6), the collar (21) being rotatably connected to a second electric push rod (22), the telescopic end of the second electric push rod (22) being fixedly connected to a second elastic telescopic rod (23), the fixed portion of the second elastic telescopic rod (23) being fixedly connected to a U-shaped frame (24), the telescopic end of the second elastic telescopic rod (23) being fixedly connected to a connecting frame (25), the connecting frame (25) being slidably connected to symmetrically distributed fixing plates (26), springs being arranged between the symmetrically distributed fixing plates (26), the fixing plates (26) being extrusion-matched with the U-shaped frame (24), and uniformly distributed welding guns being arranged on the fixing plates (26).

2. A stable welding device for processing shield machine parts according to claim 1, characterized in that: The adjustment mechanism comprises a bogie (31), the bogie (31) being fixedly connected to the telescopic end of the first elastic telescopic rod (8), the bogie (31) being slidably connected to symmetrically distributed steering plates (32), tension springs being arranged between the symmetrically distributed steering plates (32), the steering plates (32) being slidably connected to the adjacent slide plates (901), and the movable frame (6) and the collar (21) being jointly provided with a transmission assembly for adjusting the angle of the adjacent welding guns.

3. A stable welding device for shield machine parts processing according to claim 2, characterized in that: The transmission assembly comprises symmetrically distributed adjustment frames (41), the symmetrically distributed adjustment frames (41) being fixedly connected to the moving frame (6) and the collar (21) respectively, the adjustment frame (41) close to the first electric push rod (7) being provided with symmetrically distributed first sensors, and the adjustment frame (41) close to the collar (21) being slidably connected to the moving frame (6), the adjustment frame (41) being slidably connected to a rack (42), springs being provided between the symmetrically distributed first sensors on the adjustment frame (41) and the rack (42), and the first electric push rod (7) The first and second electric push rods (22) are both fixedly connected with a toothed ring (43), the toothed ring (43) meshes with the adjacent racks (42), a telescopic plate (44) is fixedly connected between the symmetrically distributed racks (42), a third electric push rod (45) is fixedly connected to the fixed portion of the telescopic plate (44), first sensors symmetrically distributed on the adjustment frame (41) are all electrically connected to the third electric push rod (45), the telescopic end of the third electric push rod (45) is fixedly connected to the telescopic portion of the telescopic plate (44), and a fixing mechanism for fixing adjacent blades is commonly provided on the symmetrically distributed arc-shaped frames (12).

4. A stable welding device for processing shield machine parts according to claim 3, characterized in that: The fixing mechanism comprises circumferentially distributed first telescopic rods (51), the circumferentially distributed first telescopic rods (51) are respectively fixedly connected to adjacent arc-shaped frames (12), the telescopic ends of the first telescopic rods (51) are fixedly connected to U-shaped plates (52), the arc-shaped frame (12) is hingedly connected to a symmetrically distributed rotating frame (53) on one side close to the adjacent first telescopic rod (51), a torsion spring is provided between the rotating frame (53) and the adjacent arc-shaped frame (12), the rotating frame (53) is pressed and matched with the adjacent U-shaped plate (52), the rotating frame (53) is slidably connected to a second positioning plate (54), and the second positioning plate (54) A tension spring is arranged between the adjacent rotating frame (53); a symmetrically distributed slide groove (55) is arranged on one side of the bottom plate (11) close to the circumferentially distributed rotating frame (53); a sealing plate (56) is slidably connected to the side of the slide groove (55) close to the adjacent first telescopic rod (51); a spring is arranged between the sealing plate (56) and the adjacent bottom plate (11); a second sensor is arranged in the slide groove (55); the symmetrically distributed second sensors on the bottom plate (11) are all electrically connected to the second electric push rod (22); and a limiting mechanism for pushing the sealing plate (56) to move is arranged on the bottom plate (11).

5. A stable welding device for processing shield machine parts according to claim 4, characterized in that: The length of the second positioning plate (54) is greater than the length of the first positioning plate (13).

6. A stable welding device for processing shield machine parts according to claim 4, characterized in that: The limiting mechanism comprises symmetrically distributed limiting rods (61), the symmetrically distributed limiting rods (61) are respectively slidably connected to adjacent sliding grooves (55), a spring is arranged between the limiting rods (61) and the adjacent sealing plate (56), the symmetrically distributed limiting rods (61) are jointly fixedly connected to a limiting shell (62), a fourth electric push rod (63) is fixedly connected to the bottom plate (11), the symmetrically distributed first sensors on the adjustment frame (41) are all electrically connected to the fourth electric push rod (63), and the extension of the fourth electric push rod (63) is The contracted end is fixedly connected to a connecting plate (64), and one end of the connecting plate (64) away from the bottom plate (11) is fixedly connected to an adjusting plate (65). An extrusion plate (66) and symmetrically distributed trapezoidal blocks (67) are slidably connected in the limiting shell (62), and both the trapezoidal blocks (67) and the adjusting plate (65) are extruded and matched with the extrusion plate (66). A spring is provided between the trapezoidal block (67) and the limiting shell (62). The trapezoidal block (67) is fixedly connected to a positioning block (68), and the positioning block (68) is extruded and matched with the electric slide rail (10).

7. A stable welding device for processing shield machine parts according to claim 6, characterized in that: The sum of the lengths of the connecting plate (64) and the telescopic end of the fourth electric push rod (63) is less than the length of the slide groove (55).

8. A stable welding device for processing shield machine parts according to claim 6, characterized in that: The extrusion plate (66) is fixedly connected with symmetrically distributed reset frames (71), the reset frames (71) are slidably connected to the limiting shell (62), and the symmetrically distributed reset frames (71) are all extrusion-matched with the bottom plate (11).

9. A stable welding device for processing shield machine parts according to claim 1, characterized in that: The invention also comprises a speed change mechanism, the speed change mechanism is arranged on the fixed frame (1), the speed change mechanism is used to adjust the rotation speed of the reciprocating screw (4), the speed change mechanism comprises a third elastic telescopic rod (81), the third elastic telescopic rod (81) is fixedly connected to the fixed frame (1), a second telescopic rod (82) is fixedly connected to a side of the fixed frame (1) close to the motor (3), a fixed portion of the third elastic telescopic rod (81) is connected to a fixed portion of the second telescopic rod (82), an adjusting ring (83) is fixedly connected to the telescopic end of the second telescopic rod (82), the adjusting ring (83) is rotationally connected to the sliding sleeve (5), and the sliding sleeve (5) is spline-connected to the reciprocating screw (4).

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