A screw flight auger welding device and method

Abstract

The application discloses a kind of spiral blade auger welding device, including spiral blade supply component for separating spiral blade stacked together, and transport to turnover assembly, center shaft supply component for separating center shaft arranged together, center shaft grabbing component for grabbing center shaft, and it is transported to the just below welding torch of welding assembly, turnover assembly is used to rotate 90 degrees to the spiral blade grabbed, and is sleeved on center shaft, feed assembly is used to drive welding assembly and turnover assembly horizontal movement;Under the common drive of turnover assembly and center shaft grabbing component, spiral blade and center shaft rotate synchronously, welding assembly moves along the center axis direction under the drive of feed assembly, so as to realize the welding of spiral blade and center shaft.The device automatically realizes spiral blade supply, center shaft supply and welding, reduces the labor intensity of worker.

Description

Technical Field

[0001] This invention relates to the field of automatic welding processing technology, and in particular to a spiral blade auger welding device and welding method. Background Technology

[0002] The helical blade auger is a key component of screw conveyors, widely used in industries such as biofuel pellets, agriculture, grain, food, chemicals, pharmaceuticals, and mining. Due to its unique helical blade structure, with its spiral shape and high degree of curvature, the welding of helical blade augers is highly challenging, requiring high precision and quality. Helical blade augers are constructed by sequentially joining multiple blade segments together and welding them to a central shaft, currently mostly done manually. This method results in high labor intensity for workers and low welding efficiency.

[0003] Chinese invention patent application number 202310369418.9 discloses a welding device for spiral blades in wastewater treatment, comprising a base plate, a spiral shaft, blades, a support plate, a sleeve, two guide sleeves, and a rotary welding mechanism. The support plate is inclinedly connected to the upper side of the base plate. The sleeve is connected to the base plate via a connecting frame, and the axis of the sleeve is parallel to the support plate. One end of the spiral shaft is inserted into the sleeve. The two guide sleeves are slidably connected to the upper side of the support plate, and the axes of the guide sleeves are parallel to the support plate. The guide sleeves are used to assist in blade fitting. The rotary welding mechanism is connected to the upper side of the support plate. When welding the spiral blades, the device first inserts one end of the spiral shaft into the sleeve, then fits the spiral blade onto the spiral shaft, and then moves the welding torch spirally along the contact position between the spiral blade and the spiral shaft for welding. The device has the following problems: 1) Welding is performed by rotating the welding torch, which causes the welding torch circuit to self-wind and entangle during the movement, which can easily cause short circuits. It will also get tangled between the spiral blades and the spiral shaft, making it difficult to separate the spiral blades and welding torch circuit after welding; 2) The feeding of the spiral shaft and spiral blades is done manually, with a low degree of automation.

[0004] Chinese invention patent application number 202311395693.4 discloses a welding device for spiral blades used in sewage treatment. This device includes an arc-shaped shell with movable grooves at both ends. A mounting frame is fixedly connected to the top of the arc-shaped shell, and support frames are fixedly connected to both ends of the bottom of the mounting frame. A positioning clamping mechanism is connected to the mounting frame, which clamps and positions both ends of the shaft tube. This invention utilizes an equidistant transverse welding mechanism to perform single-point welding at fixed positions where each spiral segment of the spiral blade contacts the shaft tube. However, this device requires manual placement of the spiral blade inside the arc-shaped shell, and the supply of the shaft tube is also done manually, resulting in low production efficiency. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention:

[0006] The primary objective is to disclose a welding device for spiral blade augers;

[0007] The second objective is to disclose a welding method based on the aforementioned spiral blade auger welding device.

[0008] Technical solution: The spiral blade auger welding device disclosed in this invention includes a spiral blade supply component, a flipping component, a welding component, a feeding component, a central shaft gripping component, and a central shaft supply component;

[0009] The spiral blade supply component is used to separate the stacked spiral blades and transport them to the flipping component. The central shaft supply component is used to separate the central shafts arranged together. The central shaft gripping component is used to grip the central shaft and transport it directly below the welding torch of the welding component. The flipping component is used to grip the spiral blades, rotate them 90 degrees, and fit them onto the central shaft. The feed component is used to drive the welding component and the flipping component to move horizontally. Under the joint drive of the flipping component and the central shaft gripping component, the spiral blades and the central shaft rotate synchronously. The welding component moves along the central shaft axis under the drive of the feed component, thereby realizing the welding of the spiral blades and the central shaft.

[0010] Furthermore, the helical blade supply component includes a clamping assembly, a separating assembly, and a shifting assembly; the clamping assembly is placed on one side of the separating assembly, one end of the shifting assembly is placed below the separating assembly, the helical blades are stacked and fitted onto the positioning post, the clamping assembly is used to clamp the second and more helical blades from bottom to top and the positioning post, the separating assembly is used to drop the bottom helical blade into the shifting assembly, and the shifting assembly is used to transport the separated helical blades to the flipping assembly;

[0011] The clamping assembly includes an L-shaped frame, an upper and lower drive mechanism, an L-shaped drive plate, a first electric chuck, and a first forming finger; the upper and lower drive mechanism is installed on the vertical surface of the L-shaped frame, the L-shaped drive plate is installed on the upper and lower drive mechanism, the first electric chuck is installed on the L-shaped drive plate, and multiple first forming fingers are installed on the jaws of the first electric chuck.

[0012] The first forming finger has a two-finger structure. The inner side of the inner finger is a cylindrical surface with a radius of curvature equal to the radius of the positioning post, and a rubber layer is attached to its surface. The surface of the rubber layer has several bumps and depressions. The length of the inner fingers of all the first forming fingers is equal. The inner side of the outer fingers of the first forming finger is a cylindrical surface, and a rubber layer is attached to its surface. The surface of the rubber layer has several bumps and depressions. The length of the outer fingers of all the first forming fingers differs from one-third of the pitch of the helical blade.

[0013] The separation assembly includes a second bracket, a left dual-axis cylinder, a left opening and closing plate, a right opening and closing plate, a positioning post, and a right dual-axis cylinder. A through hole is machined at the center of the top surface of the second bracket. Semi-circular holes are machined on opposite sides of the left and right opening and closing plates. A rubber layer is pasted on the surface of the semi-circular holes. The surface of the rubber layer has several bumps and depressions. The left and right dual-axis cylinders are respectively installed on both sides of the through hole on the top surface of the bracket. The piston rod end of the left dual-axis cylinder is fixedly connected to one side of the left opening and closing plate, and the piston rod end of the right dual-axis cylinder is fixedly connected to one side of the right opening and closing plate.

[0014] The displacement assembly includes a No. 3 bracket, a horizontal linear drive mechanism, a lifting plate, a T-shaped column, a No. 3 guide rod, a No. 3 drive plate, and a No. 3 dual-axis cylinder. The horizontal linear drive mechanism is mounted on the top surface of the No. 3 bracket. Linear bearings are mounted in a linear array on the No. 3 drive plate. A No. 3 guide rod is mounted in a linear array on the bottom surface of the lifting plate. The No. 3 guide rod, mounted in a linear array on the bottom surface of the lifting plate, passes through the linear bearings mounted in a linear array on the No. 3 drive plate, thereby allowing the lifting plate to be moved up and down on the No. 3 drive plate. The No. 3 dual-axis cylinder is mounted on the No. 3 drive plate, and the end of the piston rod of the No. 3 dual-axis cylinder is fixedly connected to the bottom surface of the lifting plate. The T-shaped column is mounted on the top surface of the lifting plate.

[0015] Furthermore, the separation assembly also includes a second guide rail and a second slider. The two second guide rails are installed parallel to each other on both sides of the top surface of the second bracket. Two second sliders are installed on each second guide rail. The bottom surface of the left opening and closing plate is fixedly connected to the second slider installed on the left side of the two second guide rails, and the bottom surface of the right opening and closing plate is fixedly connected to the second slider installed on the right side of the two second guide rails, which guides the movement of the left and right opening and closing plates.

[0016] Furthermore, the up-and-down driving mechanism is a transmission mechanism based on a lead screw and nut, a transmission mechanism based on a gear and rack transmission, a transmission mechanism based on a belt transmission, or a transmission mechanism based on a chain transmission.

[0017] Furthermore, the horizontal linear drive mechanism can be a linear drive mechanism based on screw and nut transmission, a linear drive mechanism based on gear and rack transmission, a linear drive mechanism based on belt transmission, or a linear drive mechanism based on chain transmission.

[0018] Furthermore, the flipping assembly includes a vertical feed mechanism, a mounting plate, a second rotary cylinder, a second rotary bearing, a second connector, a second rotary worktable, an electric three-jaw chuck, and gripping fingers. The second connector is composed of a circular plate and a square plate perpendicular to the circular plate, with a through hole at the center of the square plate. The mounting plate is mounted on the drive block of the vertical feed mechanism. The outer ring of the second rotary bearing is fixedly connected to the mounting plate mounted on the drive block of the vertical feed mechanism. One end of the inner ring of the second rotary bearing is fixedly connected to the rotary shaft of the second rotary cylinder mounted on the drive block of the vertical feed mechanism. The other end of the inner ring of the second rotary bearing is equipped with the second connector. The second rotary worktable is mounted on the square plate of the second connector. The electric three-jaw chuck is mounted on the rotary worktable, and gripping fingers are mounted on the jaws of the electric three-jaw chuck.

[0019] The second rotary table includes a frame support, a motor, an I-shaped connector, a worm gear, and a slewing bearing. A through hole is machined on the bottom surface of the frame support. A worm wheel is machined on the outer ring of the slewing bearing. The inner ring of the slewing bearing is fixedly mounted on the bottom surface of the frame support. The center hole of the inner ring of the slewing bearing is coaxial with the through hole on the bottom surface of the frame support. The I-shaped connector is mounted on the outer ring of the slewing bearing. The worm gear is mounted on one side of the frame support via a rolling bearing and meshes with the worm wheel on the outer ring of the slewing bearing. The motor is mounted on one side of the frame support, and the output shaft of the motor is connected to the worm gear drive.

[0020] The electric three-jaw chuck includes a chuck seat, a flat plate, a fourth support bearing, jaws, a motor, a pinion, and a chuck. The chuck seat is a hollow cylindrical structure with an opening slot machined on its top surface, three jaw mounting slots machined in a circular array on its circumference, and a through hole machined on its bottom surface. The flat plate has a through hole at its center, and the chuck has a through hole at its center. The bottom surface of the chuck has a flat thread, and the jaws have threads. The flat plate is installed in the opening slot on the top surface of the chuck seat. A gear is machined on the outer ring of the fourth support bearing, and the inner ring of the fourth support bearing is fixedly installed on the bottom surface of the flat plate, thereby suspending the fourth support bearing in the inner cavity of the chuck seat. The motor is installed on one side of the flat plate, and its output shaft passes through the through hole on one side of the flat plate. A pinion is installed on the motor output shaft, and the pinion on the motor output shaft meshes with the gear on the outer ring of the fourth support bearing. The chuck is installed on the outer ring of the fourth support bearing, and the jaws are installed in the jaw mounting slots of the chuck seat. The flat thread on the bottom surface of the chuck meshes with the threads on the jaws.

[0021] Furthermore, the welding assembly includes a vertical feed mechanism, a third rotary cylinder, a third connector, and a welding torch; the third rotary cylinder is mounted on the drive plate of the vertical feed mechanism, and the welding torch is mounted on the rotary shaft of the third rotary cylinder via the third connector. The vertical feed mechanism drives the welding torch to move up and down, and the third rotary cylinder drives the welding torch to rotate.

[0022] Furthermore, the feeding assembly includes a base, a No. 4 motor, a No. 4 A drive plate, a No. 4 B drive plate, a No. 4 lead screw, a No. 4 guide rail, and a No. 4 slider. The No. 4 lead screw is mounted on the top surface of the base via a bearing with a mounting seat. Two opening and closing nuts are fitted onto the No. 4 lead screw. The No. 4 motor is mounted on the top surface of the base via a motor mounting bracket. The output shaft of the No. 4 motor is connected to the No. 4 lead screw via a coupling. Two No. 4 guide rails are symmetrically mounted on the top surface of the base with respect to the No. 4 lead screw. The No. 4 A drive plate and the No. 4 B drive plate are respectively mounted on the No. 4 guide rail via the No. 4 slider and are respectively fixedly connected to one opening and closing nut fitted onto the No. 4 lead screw.

[0023] Furthermore, the central axis gripping component includes a front-to-back feed assembly, a left-to-right feed assembly, a top-to-bottom feed assembly, a No. 5 rotary table, a No. 5 connector, a No. 5 electric chuck, and a No. 5 forming finger. The structure of the No. 5 rotary table is the same as that of the No. 2 rotary table. The top-to-bottom feed assembly is mounted on the drive plate of the left-to-right feed assembly, the front-to-back feed assembly is mounted on the drive plate of the top-to-bottom feed assembly, and the No. 5 rotary table is mounted on the drive plate of the front-to-back feed assembly. The No. 5 electric chuck is mounted on the No. 5 rotary table via the No. 5 connector. The No. 5 forming finger is mounted on the jaws of the No. 5 electric chuck. The inner side of the No. 5 forming finger is cylindrical, and a layer of rubber is pasted on the surface. The surface of the rubber layer has several bumps and depressions.

[0024] Furthermore, the central shaft supply component includes a central shaft placement platform and a lifting assembly; the lifting assembly is located directly below one side of the central shaft placement platform, the top surface of the central shaft placement platform is a large inclined plane and a small inclined plane connected together, the large inclined plane and the small inclined plane have the same slope, the height difference between the two connected inclined planes is equal to the radius of the central shaft, a square through hole is machined on the side of the large inclined plane closer to the small inclined plane, and a semi-circular groove is machined on the side of the small inclined plane away from the large inclined plane;

[0025] The lifting assembly includes a bracket, a lifting rod, linear bearings, a guide rod, and a dual-axis cylinder. The dual-axis cylinder is installed in the central through hole on the top surface of the bracket. Linear bearings are symmetrically installed on both sides of the central through hole on the top surface of the bracket. The flange end of the guide rod is installed on the bottom surface of the lifting rod. The guide rod passes through the linear bearings installed on both sides of the central through hole on the top surface of the bracket, thereby allowing the lifting rod to be installed on the bracket in a way that allows it to move up and down. The end of the piston rod of the dual-axis cylinder is fixedly connected to the bottom surface of the lifting rod.

[0026] The welding method based on the above-mentioned spiral blade auger welding device includes the following steps:

[0027] S1. The spiral blade supply component separates the bottom layer of spiral blades stacked on the positioning post and sends them to the flipping component.

[0028] S1-1. The up-and-down drive mechanism of the clamping assembly drives the No. 1 electric chuck and the No. 1 forming finger mounted on the jaws of the No. 1 electric chuck to move down until the ends of the three No. 1 forming fingers are respectively positioned corresponding to the second spiral blade stacked on the positioning post from bottom to top. The jaws of the No. 1 electric chuck close, driving the No. 1 forming fingers to close. At this time, the inner finger of the No. 1 forming finger clamps the positioning post, and the outer finger of the No. 1 forming finger clamps the second and above spiral blades stacked on the positioning post from bottom to top.

[0029] S1-2, The piston rods of the left and right dual-axis cylinders of the separation assembly retract simultaneously. The bottommost spiral blades stacked on the positioning column, under their own weight, pass through the through hole at the center of the top surface of the second bracket and fall onto the T-shaped column of the displacement assembly.

[0030] S1-3, the piston rod of the third dual-axis cylinder of the shifting assembly retracts, and the horizontal linear drive mechanism drives the T-shaped column and the spiral blades on it to move horizontally, thereby conveying the spiral blades to the flipping assembly.

[0031] S1-4, The piston rods of the left and right dual-axis cylinders of the separation assembly extend simultaneously, the left and right opening and closing plates close, and the left and right opening and closing plates clamp the positioning column.

[0032] S1-5, The jaws of the No. 1 electric chuck open, causing the No. 1 forming finger to open. At this time, the inner finger of the No. 1 forming finger releases its grip on the positioning post, and the outer finger of the No. 1 forming finger releases its grip on the spiral blade stacked on the positioning post. Under its own weight, the spiral blade moves down a distance equal to the thickness of the spiral blade. The up-down drive mechanism of the clamping assembly drives the No. 1 electric chuck and the No. 1 forming finger mounted on the jaws of the No. 1 electric chuck to move up.

[0033] S2. The central shaft supply component separates and transports the bottom layer of the central shaft 8, which is stacked side by side on the large inclined surface of the central shaft placement platform, to the semi-circular groove on the small inclined surface of the central shaft placement platform.

[0034] S2-1. Multiple central shafts are manually stacked side by side on the large inclined surface of the central shaft placement platform.

[0035] S2-2, The piston rod of the dual-axis cylinder of the lifting assembly extends, driving the lifting rod to rise. The bosses at both ends of the lifting rod pass through the square through hole of the large inclined surface of the central shaft placement platform, gradually lifting the bottom central shaft. When the height of the central axis of the bottom central shaft exceeds the highest edge of the small inclined surface of the central shaft placement platform, the central shaft rolls along the small inclined surface of the central shaft placement platform into the semi-circular groove of the small inclined surface under its own weight.

[0036] S2-3. The piston rod of the dual-axis cylinder of the lifting assembly retracts, driving the lifting rod to descend. The bosses at both ends of the lifting rod retract from the square through hole on the large inclined surface of the central shaft placement platform. The central shafts placed on the large inclined surface of the central shaft placement platform roll down the large inclined surface one by one under their own weight.

[0037] S3. The central shaft gripping component grips the central shaft placed in the semi-circular groove of the small inclined surface on the top surface of the central shaft placement platform. Driven by the front and rear feed components, the left and right feed components and the up and down feed components, the central shaft is transported to the area directly below the welding torch of the welding component.

[0038] S4. The flipping component grabs the helical blade, rotates it 90 degrees, and then, driven by the feeding component, inserts the helical blade into the central shaft.

[0039] S5. The second rotary table of the flipping component drives the spiral blade to rotate at a constant speed. The fifth rotary table of the central shaft gripping component drives the central shaft and the spiral blade to rotate synchronously at a constant speed. The relative position of the spiral blade and the central shaft remains unchanged. Under the drive of the feed component, the welding component moves along the central axis of the central shaft and welds one side of the root of the spiral blade to the central shaft.

[0040] S6. The No. 3 rotary cylinder of the welding component rotates 90 degrees, driving the welding torch to rotate 90 degrees. The No. 2 rotary worktable of the flipping component drives the spiral blade to rotate at a constant speed. The No. 5 rotary worktable of the central shaft gripping component drives the central shaft and the spiral blade to rotate synchronously at a constant speed. Driven by the feed component, it moves in the opposite direction along the central axis of the central shaft, welding the other side of the root of the spiral blade to the central shaft.

[0041] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0042] (1) The automatic supply of helical blades, the supply of central shaft, and the welding of helical blades and central shaft reduce the labor intensity of workers;

[0043] (2) During the welding process of the spiral blade and the central shaft, the spiral blade and the central shaft rotate synchronously, which avoids the spiral rotation welding of the welding gun and causes the welding gun circuit to self-winding and entangle during the movement.

[0044] (3) During the separation process of the spiral blades, the clamping assembly clamps the second and above spiral blades and the positioning post from bottom to top, and the separation assembly makes the bottom spiral blade fall into the displacement assembly, which solves the problem that the spiral blades cannot be separated due to the accumulation of spiral blade thickness error.

[0045] (4) The feed assembly is equipped with two opening and closing nuts. By controlling the opening and closing of the opening and closing nuts, the displacement control of the flipping assembly and the welding assembly can be achieved by using one set of feed assembly, which simplifies the structure of the device and reduces the manufacturing cost. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the spiral blade auger welding equipment of the present invention;

[0047] Figure 2 This is a schematic diagram of the spiral blade supply component of the present invention;

[0048] Figure 3 This is a schematic diagram of the clamping component structure of the present invention;

[0049] Figure 4 This is a schematic diagram of the composite finger structure of the present invention;

[0050] Figure 5 This is a schematic diagram of the structure of the separate component of the present invention;

[0051] Figure 6 This is a schematic diagram of the shifting component structure of the present invention;

[0052] Figure 7 This is a schematic diagram of the flip component structure of the present invention;

[0053] Figure 8 This is a schematic diagram of the structure of the No. 2 rotary table of the present invention;

[0054] Figure 9 This is a bottom view of the structure of the No. 2 rotary table (excluding the I-shaped connector) of the present invention;

[0055] Figure 10 This is a schematic diagram of the electric three-jaw chuck structure of the present invention;

[0056] Figure 11 This is a schematic diagram of the internal structure of the electric three-jaw chuck of the present invention;

[0057] Figure 12 This is a schematic diagram of the chuck sleeve structure of the present invention;

[0058] Figure 13 This is a schematic diagram of the claw structure of the present invention;

[0059] Figure 14 This is a schematic diagram of the chuck structure of the present invention;

[0060] Figure 15 This is a schematic diagram of the welding assembly structure of the present invention;

[0061] Figure 16 This is a schematic diagram of the feed assembly structure of the present invention;

[0062] Figure 17 This is a schematic diagram of the central shaft gripping component of the present invention;

[0063] Figure 18 This is a schematic diagram of the central shaft supply component structure of the present invention;

[0064] Figure 19 This is a schematic diagram of the lifting component structure of the present invention. Detailed Implementation

[0065] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0066] like Figure 1 The spiral blade auger welding device shown includes a spiral blade supply component 1, a tilting component 2, a welding component 3, a feeding component 4, a central shaft gripping component 5, and a central shaft supply component 6. The spiral blade supply component 1 separates stacked spiral blades 7 and feeds them to the tilting component 2. The central shaft supply component 6 separates stacked central shafts 8. The central shaft gripping component 5 grips the central shafts 8 and feeds them directly below the welding torch of the welding component 3. The tilting component 2 grips the spiral blades 7, rotates them 90 degrees, and mounts them onto the central shafts 8. The feeding component 4 drives the welding component 3 and the tilting component 2 to move horizontally. Under the combined drive of the tilting component 2 and the central shaft gripping component 5, the spiral blades 7 and the central shafts 8 rotate synchronously. The welding component 3, driven by the feeding component 4, moves along the central shaft axis, thereby achieving the welding of the spiral blades 7 and the central shafts 8.

[0067] like Figure 2 As shown, the helical blade supply component 1 includes a clamping assembly 11, a separating assembly 12, and a shifting assembly 13. The clamping assembly 11 is positioned on one side of the separating assembly 12, and one end of the shifting assembly 13 is positioned below the separating assembly 12. The helical blades 7 are stacked and fitted onto the positioning post 127. The clamping assembly 11 is used to clamp the second and subsequent helical blades from bottom to top and the positioning post 127. The separating assembly 12 is used to drop the bottommost helical blade 7 into the shifting assembly 13. The shifting assembly 13 is used to transport the separated helical blades to the flipping assembly 2.

[0068] like Figure 3As shown, the clamping assembly 11 includes an L-shaped frame 111, a first motor 112, a first guide bar 113, a first lead screw 114, a first slider 115, an L-shaped drive plate 116, a first electric chuck 117, and a first forming finger 118. The first lead screw 114 is mounted on the vertical plate of the L-shaped frame 111 via a bearing seat. Two first guide bars 113 are symmetrical to the first lead screw 114 and are mounted on the vertical plate of the L-shaped frame 111 via T-shaped guide bar mounting seats. The first motor 112 is mounted on the vertical plate of the L-shaped frame 111 via a motor mounting bracket, and the output shaft of the first motor 112 is connected to one end of the first lead screw 114 via a coupling. The first guide bar 113 is fitted with the first slider 115, and the first lead screw 114 is fitted with a nut (not shown in the figure). The L-shaped drive plate 116 is movably mounted on the first guide rod 113 via the first slider 115 and is fixedly connected to the first lead screw 114 by a nut. The first electric chuck 117 is mounted on the L-shaped drive plate 116, and three first forming fingers 118 are mounted on the jaws of the first electric chuck 117. When the output shaft of the first motor 112 rotates, it drives the first electric chuck 117 and the first forming fingers 118 mounted on the jaws of the first electric chuck 117 to move up and down through the lead screw and nut mechanism.

[0069] like Figure 4 As shown, the first forming finger 118 has a two-finger structure. The inner side of the inner finger 118.1 is a cylindrical surface with a radius of curvature equal to that of the positioning post 127. A rubber layer is attached to the surface of the inner finger 118.1, which has several bumps and depressions. The inner fingers 118.1 of the three first forming fingers 118 are all of equal length. The inner side of the outer finger 118.2 of the first forming finger 118 is a cylindrical surface with a rubber layer attached to the surface. The rubber layer has several bumps and depressions. The lengths of the outer fingers 118.2 of the three first forming fingers 118 are successively one-third of the pitch of the spiral blade 7.

[0070] like Figure 5As shown, the separation assembly 12 includes a second bracket 121, a second guide rail 122, a left dual-axis cylinder 123, a second slider 124, a left opening plate 125, a right opening plate 126, a positioning post 127, and a right dual-axis cylinder 128. A through hole 121.1 is machined at the center of the top surface of the second bracket 121. Semicircular holes are machined on opposite sides of the left and right opening plates 125 and 126. A rubber layer is adhered to the surface of the semicircular holes, and the rubber layer has several raised and recessed points. When the left and right opening plates 125 and 126 are closed, they clamp the positioning post 127. Two guide rails 122 are installed parallel to each other on both sides of the top surface of the bracket 121. The left opening plate 125 and the right opening plate 126 are movably installed on the guide rails 122 via the sliders 124. The left dual-axis cylinder 123 and the right dual-axis cylinder 128 are installed on both sides of the through hole 121.1 on the top surface of the bracket 121. The piston rod end of the left dual-axis cylinder 123 is fixedly connected to one side of the left opening plate 125, and the piston rod end of the right dual-axis cylinder 128 is fixedly connected to one side of the right opening plate 126. When the piston rods of the left dual-axis cylinder 123 and the right dual-axis cylinder 128 extend and retract simultaneously, they drive the left opening plate 125 and the right opening plate 126 to move towards or away from each other, thereby closing or separating the left opening plate 125 and the right opening plate 126.

[0071] like Figure 6As shown, the shifting assembly 13 includes a third bracket 131, a third guide rail 132, a third motor 133, a third lead screw 134, a lifting plate 135, a T-shaped column 136, a third guide rod 137, a third drive plate 138, and a third dual-axis cylinder 139. The third lead screw 134 is mounted on the top surface of the third bracket 131 via a bearing seat. Two third guide rails 132 are symmetrically mounted on the top surface of the third bracket 131 with respect to the third lead screw 134. The third motor 133 is mounted on the top surface of the third bracket 131 via a motor mounting bracket, and the output shaft of the third motor 133 is connected to one end of the third lead screw 134 via a coupling. The third lead screw 132 is fitted with a slider, and the third lead screw 134 is fitted with a nut (not shown in the figure). The third drive plate 138 is fixedly connected to the slider installed in conjunction with the third guide rail 132, thereby movably mounting the third drive plate 138 on the third guide rail 132. The third drive plate 138 is also fixedly connected to the nut installed in conjunction with the third lead screw 134. Linear bearings are installed in a linear array on the third drive plate 138. The third guide rod 137 is installed in a linear array on the bottom surface of the lifting plate 135. The third guide rod 137, which is installed in a linear array on the bottom surface of the lifting plate 135, passes through the linear bearings installed in a linear array on the third drive plate 138, thereby movably mounting the lifting plate 135 on the third drive plate 138. The third dual-axis cylinder 139 is installed on the third drive plate 138. The end of the piston rod of the third dual-axis cylinder 139 is fixedly connected to the bottom surface of the lifting plate 135. The T-shaped column 136 is installed on the top surface of the lifting plate 135. When the piston rod of the third dual-axis cylinder 139 extends or retracts, it drives the lifting plate 135 to move up and down.

[0072] The working process of the helical blade supply component 1 is as follows:

[0073] 1) The first motor 112 of the clamping assembly 11 starts, and drives the first electric chuck 117 and the first forming finger 118 mounted on the jaws of the first electric chuck 117 to move down through the lead screw and nut mechanism until the ends of the three first forming fingers 118 are respectively positioned corresponding to the second spiral blade 7 stacked on the positioning post 127 from bottom to top. The jaws of the first electric chuck 117 close, driving the first forming fingers 118 to close. At this time, the inner finger 118.1 of the first forming finger 118 clamps the positioning post 127, and the outer finger 118.2 of the first forming finger 118 clamps the second and above spiral blades 7 stacked on the positioning post 127 from bottom to top.

[0074] 2) The piston rods of the left dual-axis cylinder 123 and the right dual-axis cylinder 128 of the separation assembly 12 retract simultaneously. The bottommost spiral blade 7, which is stacked on the positioning column 127, passes through the through hole 121.1 at the center of the top surface of the second bracket 121 under its own weight and falls onto the T-shaped column 136 of the displacement assembly 13.

[0075] 3) The piston rod of the third dual-axis cylinder 139 of the shifting assembly 13 retracts, the third motor 133 starts, driving the T-shaped column 136 and the spiral blade 7 on it to move horizontally, thereby conveying the spiral blade 7 to the flipping assembly 2.

[0076] 4) The piston rods of the left dual-axis cylinder 123 and the right dual-axis cylinder 128 of the separation assembly 12 extend simultaneously, the left opening and closing plate 125 and the right opening and closing plate 126 close, and the left opening and closing plate 125 and the right opening and closing plate 126 clamp the positioning column 127.

[0077] 5) The jaws of the first electric chuck 117 open, causing the first forming finger 118 to open. At this time, the inner finger 118.1 of the first forming finger 118 releases its grip on the positioning post 127, and the outer finger 118.2 of the first forming finger 118 releases its grip on the spiral blade 7 stacked on the positioning post 127. Under its own weight, the spiral blade 7 moves down a distance equal to the thickness of a spiral blade. The first motor 112 of the clamping assembly 11 starts, driving the first electric chuck 117 and the first forming finger 118 mounted on the jaws of the first electric chuck 117 to move up through the screw and nut mechanism.

[0078] 6) Repeat steps 1 to 5 to separate the spiral blades 7 stacked on the positioning post 127 one by one and transport them to the flipping assembly 2.

[0079] like Figure 7 As shown, the flipping assembly 2 includes a vertical feed mechanism 21, a mounting plate 22, a second rotary cylinder 23, a second rotary bearing 24, a second connector 25, a second rotary worktable 26, an electric three-jaw chuck 27, and gripping fingers 28. The second connector 25 consists of a circular plate and a square plate perpendicular to the circular plate, with a through hole at the center of the square plate. Mounting plate 22 is mounted on the drive block of vertical feed mechanism 21. The outer ring of No. 2 slewing bearing 24 is fixedly connected to mounting plate 22 mounted on drive block of vertical feed mechanism 21. One end of inner ring of No. 2 slewing bearing 24 is fixedly connected to the rotation shaft of No. 2 slewing cylinder 23 mounted on drive block of vertical feed mechanism 21. No. 2 connector 25 is mounted on the other end of inner ring of No. 2 slewing bearing 24. No. 2 slewing table 26 is mounted on square plate of No. 2 connector 25. Electric three-jaw chuck 27 is mounted on No. 2 slewing table 26. Clamping fingers 28 are mounted on jaws of electric three-jaw chuck 27.

[0080] like Figure 8 and 9As shown, the second rotary table 26 includes a frame-type support 261, a motor 262, an I-shaped connector 263, a worm gear 264, and a slewing bearing 265. A through hole 261.1 is machined on the bottom surface of the frame-type support 261, and a worm wheel is machined on the outer ring of the slewing bearing 265. The inner ring of the slewing bearing 265 is fixedly mounted on the bottom surface of the frame-type support 261, and the center hole of the inner ring of the slewing bearing 265 is coaxial with the through hole 261.1 on the bottom surface of the frame-type support 261. The I-shaped connector 263 is mounted on the outer ring of the slewing bearing 265. The worm gear 264 is mounted on one side of the frame-type support 261 via a rolling bearing, and the worm gear 264 meshes with the worm wheel on the outer ring of the slewing bearing 265. The motor 262 is mounted on one side of the frame-type support 261, and the output shaft of the motor 262 is connected to the worm gear 264 for transmission. When the output shaft of the motor 262 rotates, it drives the worm gear 264 to rotate. The rotation of the worm gear 264 drives the outer ring of the slewing bearing 265 and the I-shaped connector 263 mounted on it to rotate.

[0081] like Figures 10 to 14 As shown, the electric three-jaw chuck 27 includes a chuck base 271, a flat plate 272, a fourth support bearing 273, jaws 274, a motor 275, a pinion 276, and a chuck 277. The chuck base 271 is a hollow cylindrical structure with an opening groove 271.2 machined on its top surface, three jaw mounting grooves 271.1 machined in a circular array on its circumference, and a through hole machined on its bottom surface. The flat plate 272 has a through hole machined at its center, and the chuck 277 has a through hole 277.1 machined at its center. The bottom surface of the chuck 277 has a flat thread 277.2, and the jaws 274 have threads machined on them. A plate 272 is installed in the opening slot 271.2 on the top surface of the chuck seat 271. A gear is machined on the outer ring of the fourth support bearing 273. The inner ring of the fourth support bearing 273 is fixedly installed on the bottom surface of the plate 272, thereby suspending the fourth support bearing 273 in the inner cavity of the chuck seat 271. A motor 275 is installed on one side of the plate 272. Its output shaft passes through a through hole on one side of the plate 272. A pinion 276 is installed on the output shaft of the motor 275. The pinion 276 on the output shaft of the motor 275 meshes with the gear on the outer ring of the fourth support bearing 273. A chuck 277 is installed on the outer ring of the fourth support bearing 273. A jaw 274 is installed in the jaw mounting slot 271.1 of the chuck seat 271. The flat thread on the bottom surface of the chuck 277 meshes with the thread on the jaw 274. When the output shaft of motor 275 rotates, it drives the pinion 276 on it to rotate. The rotation of pinion 276 drives the outer ring of the fourth support bearing 273 and the chuck 277 mounted on it to rotate. The rotation of chuck 277 realizes the closing or opening of the jaws 274.

[0082] like Figure 15As shown, the welding assembly 3 includes a vertical feed mechanism 31, a third rotary cylinder 32, a third connector 33, and a welding torch 34. The third rotary cylinder 32 is mounted on the drive plate of the vertical feed mechanism 31, and the welding torch 34 is mounted on the rotary shaft of the third rotary cylinder 32 via the third connector 33. The vertical feed mechanism 31 drives the welding torch 34 to move up and down, and the third rotary cylinder 32 drives the welding torch 34 to rotate.

[0083] like Figure 16 As shown, the feed assembly 4 includes a base 41, a fourth motor 42, a fourth A drive plate 43, a fourth B drive plate 44, a fourth lead screw 45, a fourth guide rail 46, and a fourth slider 47. The fourth lead screw 45 is mounted on the top surface of the base 41 via a bearing with a mounting seat. Two opening and closing nuts (not shown in the figure) are fitted onto the fourth lead screw 45. The fourth motor 42 is mounted on the top surface of the base 41 via a motor mounting bracket. The output shaft of the fourth motor 42 is connected to the fourth lead screw 45 via a coupling. The two fourth guide rails 46 are symmetrically mounted on the top surface of the base 41 with respect to the fourth lead screw 45. The fourth A drive plate 43 and the fourth B drive plate 44 are respectively mounted on the fourth guide rail 46 via the fourth slider 47 and are respectively fixedly connected to one of the opening and closing nuts fitted onto the fourth lead screw 45.

[0084] like Figure 17 As shown, the central axis gripping component 5 includes a front-to-back feed assembly 51, a left-to-right feed assembly 52, a vertical feed assembly 53, a fifth rotary table 54, a fifth connector 55, a fifth electric chuck 56, and a fifth forming finger 57. The structure of the fifth rotary table 54 is the same as that of the second rotary table 26. The vertical feed assembly 53 is mounted on the drive plate of the left-to-right feed assembly 52, the front-to-back feed assembly 51 is mounted on the drive plate of the vertical feed assembly 53, the fifth rotary table 54 is mounted on the drive plate of the front-to-back feed assembly 51, the fifth electric chuck 56 is mounted on the fifth rotary table 54 via the fifth connector 55, and the fifth forming finger 57 is mounted on the jaws of the fifth electric chuck 56. The inner side of the fifth forming finger 57 is cylindrical, and a rubber layer is adhered to the surface. The surface of the rubber layer has several bumps and depressions.

[0085] like Figure 18 As shown, the central shaft supply component 6 includes a central shaft placement platform 61 and a lifting assembly 62. The lifting assembly 62 is located directly below one side of the central shaft placement platform 61. The top surface of the central shaft placement platform 61 consists of a large inclined plane and a small inclined plane connected together. The large and small inclined planes have the same slope, and the height difference between the two connected inclined planes is equal to the radius of the central shaft 8. A square through hole 61.1 is machined on the side of the large inclined plane closer to the small inclined plane, and a semi-circular groove 61.2 is machined on the side of the small inclined plane away from the large inclined plane.

[0086] like Figure 19As shown, the lifting assembly 62 includes a bracket 621, a lifting rod 622, a linear bearing 623, a guide rod 624, and a dual-axis cylinder 625. The dual-axis cylinder 625 is installed in the central through hole on the top surface of the bracket 621. Linear bearings 623 are symmetrically installed on both sides of the central through hole on the top surface of the bracket 621. The flange end of the guide rod 624 is installed on the bottom surface of the lifting rod 622. The guide rod 624 passes through the linear bearings 623 installed on both sides of the central through hole on the top surface of the bracket 621, thereby allowing the lifting rod 622 to be movably mounted on the bracket 621. The end of the piston rod of the dual-axis cylinder 625 is fixedly connected to the bottom surface of the lifting rod 622. When the piston rod of the dual-axis cylinder 625 extends or retracts, it drives the lifting rod 622 to move up and down.

[0087] The working process of the central shaft supply component 6 is as follows:

[0088] 1) Multiple central shafts 8 are manually stacked side by side on the large inclined surface of the top surface of the central shaft placement platform 61.

[0089] 2) The piston rod of the dual-axis cylinder 625 of the lifting assembly 62 extends, driving the lifting rod 622 to rise. The bosses at both ends of the lifting rod 622 pass through the square through hole 61.1 of the large inclined surface on the top surface of the central shaft placement platform 61, gradually lifting the bottom central shaft 8. When the height of the central axis of the bottom central shaft 8 exceeds the highest edge of the small inclined surface on the top surface of the central shaft placement platform 61, the central shaft 8 rolls along the small inclined surface on the top surface of the central shaft placement platform 61 under its own weight into the semi-circular groove 61.2 of the small inclined surface.

[0090] 3) The piston rod of the dual-axis cylinder 625 that lifts component 62 retracts, causing the lifting rod 622 to descend. The bosses at both ends of the lifting rod 622 retract from the square through hole 61.1 on the large inclined surface of the top surface of the central shaft placement platform 61. The central shafts 8 placed on the large inclined surface of the top surface of the central shaft placement platform 61 roll down the large inclined surface one by one under their own weight.

[0091] 4) Repeat steps 2 and 3 to separate the central shafts 8 that are placed side by side on the large inclined surface on the top surface of the central shaft placement platform 61.

[0092] The welding method for spiral blade augers is as follows:

[0093] 1) The spiral blade supply component 1 separates the bottom spiral blade 7 of the spiral blade 7 stacked on the positioning post 127 and sends it to the flipping component 2.

[0094] 2) The central shaft supply component 6 separates and transports the bottommost central shaft 8, which is stacked side by side on the large inclined surface of the top surface of the central shaft placement platform 61, to the semi-circular groove 61.2 on the small inclined surface of the top surface of the central shaft placement platform 61.

[0095] 3) The central shaft gripping component 5 grips the central shaft 8 placed in the semi-circular groove 61.2 of the small inclined surface on the top surface of the central shaft placement platform 61. Under the joint drive of the front and rear feed components 51, the left and right feed components 52 and the up and down feed components 53, the central shaft 8 is transported to the area directly below the welding torch 34 of the welding component 3.

[0096] 4) The flipping component 2 grabs the spiral blade 7, rotates it 90 degrees, and then, driven by the feeding component 4, inserts the spiral blade 7 into the central shaft 8.

[0097] 5) The second rotary table 26 of the flipping component 2 drives the spiral blade 7 to rotate at a constant speed. The fifth rotary table 54 of the central shaft gripping component 5 drives the central shaft 8 and the spiral blade 7 to rotate synchronously at a constant speed. The relative position of the spiral blade 7 and the central shaft 8 remains unchanged. Under the drive of the feed component 4, the welding component 3 moves along the central axis of the central shaft 8 and welds one side of the root of the spiral blade 7 to the central shaft 8.

[0098] 6) The third rotary cylinder 32 of welding assembly 3 rotates 90 degrees, driving the welding torch 34 to rotate 90 degrees. The second rotary worktable 26 of the flipping assembly 2 drives the spiral blade 7 to rotate at a constant speed. The fifth rotary worktable 54 of the central shaft gripping component 5 drives the central shaft 8 and the spiral blade 7 to rotate synchronously at a constant speed. Under the drive of the feed assembly 4, the welding assembly 3 moves in the opposite direction along the central axis of the central shaft 8, welding the other side of the root of the spiral blade 7 to the central shaft 8.

Claims

1. A spiral blade auger welding device, characterized in that: It includes a spiral blade supply component (1), a flipping component (2), a welding component (3), a feeding component (4), a central shaft gripping component (5), and a central shaft supply component (6). The spiral blade supply component (1) is used to separate the stacked spiral blades (7) and transport them to the flipping component (2). The central shaft supply component (6) is used to separate the central shafts (8) arranged together. The central shaft gripping component (5) is used to grip the central shaft (8) and transport it directly below the welding torch of the welding component (3). The flipping component (2) is used to grip the spiral blades (7), rotate them 90 degrees, and fit them onto the central shaft (8). The feed component (4) is used to drive the welding component (3) and the flipping component (2) to move horizontally. Under the joint drive of the flipping component (2) and the central shaft gripping component (5), the spiral blades (7) and the central shaft (8) rotate synchronously. Under the drive of the feed component (4), the welding component (3) moves along the central shaft axis, thereby realizing the welding of the spiral blades (7) and the central shaft (8). The spiral blade supply component (1) includes a clamping assembly (11), a separating assembly (12), and a shifting assembly (13); the clamping assembly (11) is placed on one side of the separating assembly (12), and one end of the shifting assembly (13) is placed below the separating assembly (12). The spiral blades (7) are stacked and fitted on the positioning post (127). The clamping assembly (11) is used to clamp the second and above spiral blades (7) from bottom to top and the positioning post (127). The separating assembly (12) is used to drop the bottom spiral blade (7) into the shifting assembly (13). The shifting assembly (13) is used to transport the separated spiral blades (7) to the flipping assembly (2). The clamping assembly (11) includes an L-shaped frame (111), an up-and-down drive mechanism, an L-shaped drive plate (116), a first electric chuck (117), and a first forming finger (118). The up-and-down drive mechanism is installed on the vertical surface of the L-shaped frame (111), the L-shaped drive plate (116) is installed on the up-and-down drive mechanism, the first electric chuck (117) is installed on the L-shaped drive plate (116), and multiple first forming fingers (118) are installed on the jaws of the first electric chuck (117). The first forming finger (118) has a double-finger structure. The inner side of the inner finger (118.1) is a cylindrical surface with a radius of curvature equal to that of the positioning post (127). A rubber layer is attached to the surface of the inner finger (118.1), which has several bumps and depressions. The lengths of the inner fingers (118.1) of all the first forming fingers (118) are equal. The inner side of the outer finger (118.2) of the first forming finger (118) is a cylindrical surface with a rubber layer attached to the surface. The rubber layer has several bumps and depressions. The lengths of the outer fingers (118.2) of all the first forming fingers (118) differ from the pitch of the spiral blade (7) by one-third. The separation assembly (12) includes a second bracket (121), a left dual-axis cylinder (123), a left opening and closing plate (125), a right opening and closing plate (126), a positioning post (127), and a right dual-axis cylinder (128). A through hole (121.1) is machined at the center of the top surface of the second bracket (121). Semi-circular holes are machined on opposite sides of the left opening and closing plate (125) and the right opening and closing plate (126). A rubber layer is pasted on the surface of the semi-circular holes. The surface of the rubber layer has several bumps. The left dual-axis cylinder (123) and the right dual-axis cylinder (128) are respectively installed on both sides of the through hole (121.1) on the top surface of the second bracket (121). The piston rod end of the left dual-axis cylinder (123) is fixedly connected to one side of the left opening and closing plate (125), and the piston rod end of the right dual-axis cylinder (128) is fixedly connected to one side of the right opening and closing plate (126). The displacement assembly (13) includes a third bracket (131), a horizontal linear drive mechanism, a lifting plate (135), a T-shaped column (136), a third guide rod (137), a third drive plate (138), and a third dual-axis cylinder (139). The horizontal linear drive mechanism is mounted on the top surface of the third bracket (131), the third drive plate (138) is mounted on the horizontal linear drive mechanism, and linear bearings are mounted in a linear array on the third drive plate (138). The third dual-axis cylinder (139) is mounted in a linear array on the bottom surface of the lifting plate (135). The guide rod (137), which is linearly arrayed on the bottom surface of the lifting plate (135), passes through the linear bearings that are linearly arrayed on the driving plate (138), thereby allowing the lifting plate (135) to be moved up and down on the driving plate (138). The third dual-axis cylinder (139) is mounted on the driving plate (138), and the end of the piston rod of the third dual-axis cylinder (139) is fixedly connected to the bottom surface of the lifting plate (135). The T-shaped column (136) is mounted on the top surface of the lifting plate (135).

2. The spiral blade auger welding device according to claim 1, characterized in that: The separation assembly (12) also includes a second guide rail (122) and a second slider (124). The two second guide rails (122) are installed parallel to each other on both sides of the top surface of the second bracket (121). Two second sliders (124) are installed on each second guide rail (122). The bottom surface of the left opening plate (125) is fixedly connected to the second slider (124) installed on the left side of the two second guide rails (122), and the bottom surface of the right opening plate (126) is fixedly connected to the second slider (124) installed on the right side of the two second guide rails (122), which guides the movement of the left opening plate (125) and the right opening plate (126).

3. The spiral blade auger welding device according to claim 1, characterized in that: The up-and-down driving mechanism is a transmission mechanism based on a lead screw and nut, a transmission mechanism based on a gear and rack transmission, a transmission mechanism based on a belt transmission, or a transmission mechanism based on a chain transmission.

4. The spiral blade auger welding device according to claim 1, characterized in that: The horizontal linear drive mechanism can be a linear drive mechanism based on screw and nut transmission, a linear drive mechanism based on gear and rack transmission, a linear drive mechanism based on belt transmission, or a linear drive mechanism based on chain transmission.

5. The spiral blade auger welding device according to claim 2, characterized in that: The flipping assembly (2) includes a vertical feed mechanism (21), a mounting plate (22), a second rotary cylinder (23), a second rotary bearing (24), a second connector (25), a second rotary worktable (26), an electric three-jaw chuck (27), and gripping fingers (28). The second connector (25) is composed of a circular plate and a square plate perpendicular to the circular plate, with a through hole at the center of the square plate. The mounting plate (22) is mounted on the drive block of the vertical feed mechanism (21), and the outer ring of the second rotary bearing (24) is mounted on the vertical feed mechanism. The mounting plate (22) on the drive block of (21) is fixedly connected. One end of the inner ring of the second slewing bearing (24) is fixedly connected to the slewing shaft of the second slewing cylinder (23) mounted on the drive block of the vertical feed mechanism (21). The other end of the inner ring of the second slewing bearing (24) is equipped with the second connector (25). The second slewing worktable (26) is mounted on the square plate of the second connector (25). The electric three-jaw chuck (27) is mounted on the second slewing worktable (26). The jaws of the electric three-jaw chuck (27) are equipped with clamping fingers (28). The second rotary table (26) includes a frame bracket (261), a motor (262), an I-shaped connector (263), a worm gear (264), and a slewing bearing (265). A through hole (261.1) is machined on the bottom surface of the frame bracket (261). A worm gear is machined on the outer ring of the slewing bearing (265). The inner ring of the slewing bearing (265) is fixedly installed on the bottom surface of the frame bracket (261). The middle ring of the inner ring of the slewing bearing (265)... The core hole is coaxial with the through hole (261.1) on the bottom surface of the frame bracket (261). The I-shaped connector (263) is installed on the outer ring of the slewing bearing (265). The worm (264) is installed on one side of the frame bracket (261) through a rolling bearing. The worm (264) meshes with the worm wheel on the outer ring of the slewing bearing (265). The motor (262) is installed on one side of the frame bracket (261). The output shaft of the motor (262) is connected to the worm (264) for transmission. The electric three-jaw chuck (27) includes a chuck seat (271), a plate (272), a fourth support bearing (273), jaws (274), a motor (275), a pinion (276), and a chuck (277). The chuck seat (271) is a hollow cylindrical structure with an opening groove (271.2) machined on its top surface, three jaw mounting grooves (271.1) machined in a circular array on its circumference, and a through hole machined on its bottom surface. A through hole is machined at the center of the plate (272), and a through hole (277.1) is machined at the center of the chuck (277). A flat thread (277.2) is machined on the bottom surface of the chuck (277), and threads are machined on the jaws (274). The plate (272) is installed in the opening groove (271.2) on the top surface of the chuck seat (271), and the fourth support bearing (273) is installed in the opening groove (271.2) on the top surface of the chuck seat (271). Gears are machined on the outer ring of the No. 4 support bearing (273). The inner ring of the No. 4 support bearing (273) is fixedly installed on the bottom surface of the plate (272), thereby suspending the No. 4 support bearing (273) in the inner cavity of the chuck seat (271). The motor (275) is installed on one side of the plate (272), and its output shaft passes through the through hole on one side of the plate (272). A small gear (276) is installed on the output shaft of the motor (275). The small gear (276) installed on the output shaft of the motor (275) meshes with the gear on the outer ring of the No. 4 support bearing (273). The chuck (277) is installed on the outer ring of the No. 4 support bearing (273). The jaw (274) is installed in the jaw mounting groove (271.1) of the chuck seat (271). The flat thread on the bottom surface of the chuck (277) meshes with the thread on the jaw (274).

6. The spiral blade auger welding device according to claim 5, characterized in that: The welding assembly (3) includes a vertical feed mechanism (31), a third rotary cylinder (32), a third connector (33), and a welding torch (34). The third rotary cylinder (32) is mounted on the drive plate of the vertical feed mechanism (31), and the welding torch (34) is mounted on the rotary shaft of the third rotary cylinder (32) through the third connector (33). The vertical feed mechanism (31) drives the welding torch (34) to move up and down, and the third rotary cylinder (32) drives the welding torch (34) to rotate.

7. The spiral blade auger welding device according to claim 6, characterized in that: The feed assembly (4) includes a base (41), a fourth motor (42), a fourth A drive plate (43), a fourth B drive plate (44), a fourth lead screw (45), a fourth guide rail (46), and a fourth slider (47). The fourth lead screw (45) is mounted on the top surface of the base (41) via a bearing seat. Two opening and closing nuts are fitted on the fourth lead screw (45). The fourth motor (42) is mounted on the top surface of the base (41) via a motor mounting bracket. The output shaft of the fourth motor (42) is connected to the fourth lead screw (45) via a coupling. Two fourth guide rails (46) are symmetrically mounted on the top surface of the base (41) relative to the fourth lead screw (45). The fourth A drive plate (43) and the fourth B drive plate (44) are respectively mounted on the fourth guide rail (46) via the fourth slider (47) and are respectively fixedly connected to one opening and closing nut fitted on the fourth lead screw (45).

8. The spiral blade auger welding device according to claim 7, characterized in that: The central axis gripping component (5) includes a front-to-back feed assembly (51), a left-to-right feed assembly (52), a top-to-bottom feed assembly (53), a No. 5 rotary table (54), a No. 5 connector (55), a No. 5 electric chuck (56), and a No. 5 forming finger (57). The structure of the No. 5 rotary table (54) is the same as that of the No. 2 rotary table (26). The top-to-bottom feed assembly (53) is mounted on the drive plate of the left-to-right feed assembly (52), and the front-to-back feed assembly... (51) Installed on the drive plate of the up and down feed assembly (53), the No. 5 rotary table (54) is installed on the drive plate of the front and rear feed assembly (51), the No. 5 electric chuck (56) is installed on the No. 5 rotary table (54) through the No. 5 connector (55), the No. 5 forming finger (57) is installed on the jaw of the No. 5 electric chuck (56), the inner side of the No. 5 forming finger (57) is cylindrical, and a layer of rubber is pasted on the surface, and the surface of the rubber layer has several bumps.

9. The spiral blade auger welding device according to claim 8, characterized in that: The central shaft supply component (6) includes a central shaft placement platform (61) and a lifting assembly (62); the lifting assembly (62) is located directly below one side of the central shaft placement platform (61). The top surface of the central shaft placement platform (61) consists of a large inclined plane and a small inclined plane connected together. The large inclined plane and the small inclined plane have the same slope. The height difference between the two connected inclined planes is equal to the radius of the central shaft (8). A square through hole (61.1) is machined on the side of the large inclined plane closer to the small inclined plane, and a semi-circular groove (61.2) is machined on the side of the small inclined plane away from the large inclined plane. The lifting assembly (62) includes a bracket (621), a lifting rod (622), a linear bearing (623), a guide rod (624), and a dual-axis cylinder (625). The dual-axis cylinder (625) is installed in the central through hole on the top surface of the bracket (621). The linear bearings (623) are symmetrically installed on both sides of the central through hole on the top surface of the bracket (621). The flange end of the guide rod (624) is installed on the bottom surface of the lifting rod (622). The guide rod (624) passes through the linear bearings (623) installed on both sides of the central through hole on the top surface of the bracket (621), thereby allowing the lifting rod (622) to be installed on the bracket (621) in a way that allows it to move up and down. The piston rod end of the dual-axis cylinder (625) is fixedly connected to the bottom surface of the lifting rod (622).

10. A welding method based on the spiral blade auger welding device of claim 9, comprising the following steps: S1, the spiral blade supply component (1) separates the bottom spiral blade (7) of the spiral blade (7) stacked on the positioning post (127) and sends it to the flipping component (2); S1-1, The up-and-down drive mechanism of the clamping assembly (11) drives the first electric chuck (117) and the first forming finger (118) mounted on the jaws of the first electric chuck (117) to move down until the ends of the three first forming fingers (118) are respectively positioned corresponding to the second spiral blade (7) stacked on the positioning post (127) from bottom to top. The jaws of the first electric chuck (117) close, driving the first forming fingers (118) to close. At this time, the inner finger (118.1) of the first forming finger (118) clamps the positioning post (127), and the outer finger (118.2) of the first forming finger (118) clamps the second and above spiral blades (7) stacked on the positioning post (127) from bottom to top. S1-2, The piston rods of the left dual-axis cylinder (123) and the right dual-axis cylinder (128) of the separation assembly (12) retract simultaneously. The bottommost spiral blade (7) stacked on the positioning column (127) passes through the through hole (121.1) at the center of the top surface of the second bracket (121) under its own weight and falls onto the T-shaped column (136) of the displacement assembly (13). S1-3, the piston rod of the third dual-axis cylinder (139) of the shifting assembly (13) retracts, and the horizontal linear drive mechanism drives the T-shaped column (136) and the spiral blade (7) on it to move horizontally, thereby conveying the spiral blade (7) to the flipping assembly (2). S1-4, The piston rods of the left dual-axis cylinder (123) and the right dual-axis cylinder (128) of the separation assembly (12) extend simultaneously, the left opening and closing plate (125) and the right opening and closing plate (126) close, and the left opening and closing plate (125) and the right opening and closing plate (126) clamp the positioning column (127). S1-5, the jaws of the first electric chuck (117) open, causing the first forming finger (118) to open. At this time, the inner finger (118.1) of the first forming finger (118) releases its grip on the positioning post (127), and the outer finger (118.2) of the first forming finger (118) releases its grip on the spiral blade (7) stacked on the positioning post (127). Under its own weight, the spiral blade (7) moves down a distance equal to the thickness of a spiral blade. The up-down drive mechanism of the clamping assembly (11) drives the first electric chuck (117) and the first forming finger (118) mounted on the jaws of the first electric chuck (117) to move up. S2, the central shaft supply component (6) separates and transports the bottommost central shaft (8) that is stacked side by side on the large inclined surface of the top surface of the central shaft placement platform (61) to the semi-circular groove (61.2) on the small inclined surface of the top surface of the central shaft placement platform (61); S2-1. Multiple central shafts (8) are stacked side by side on the large inclined surface of the top surface of the central shaft placement platform (61). S2-2, The piston rod of the dual-axis cylinder (625) of the lifting assembly (62) extends, driving the lifting rod (622) to rise. The bosses at both ends of the lifting rod (622) pass through the square through hole (61.1) of the large inclined surface on the top surface of the central shaft placement platform (61), gradually lifting the bottommost central shaft (8). When the height of the central axis of the bottommost central shaft (8) exceeds the highest edge of the small inclined surface on the top surface of the central shaft placement platform (61), the central shaft (8) rolls along the small inclined surface on the top surface of the central shaft placement platform (61) into the semi-circular groove (61.2) of the small inclined surface under its own weight. S2-3, the piston rod of the dual-axis cylinder (625) of the lifting assembly (62) retracts, driving the lifting rod (622) to descend. The bosses at both ends of the lifting rod (622) retract from the square through hole (61.1) on the large inclined surface of the top surface of the central shaft placement platform (61). The central shafts (8) placed on the large inclined surface of the top surface of the central shaft placement platform (61) roll down one by one along the large inclined surface under their own weight. S3, the central shaft gripping component (5) grips the central shaft (8) placed in the semi-circular groove (61.2) of the small inclined surface on the top surface of the central shaft placement platform (61), and under the joint drive of the front and rear feed components (51), the left and right feed components (52) and the up and down feed components (53), the central shaft (8) is transported to the welding gun (34) of the welding component (3); S4. The flipping component (2) grabs the spiral blade (7), rotates it 90 degrees, and then, driven by the feeding component (4), inserts the spiral blade (7) into the central shaft (8). S5. The second rotary table (26) of the flipping component (2) drives the spiral blade (7) to rotate at a constant speed. The fifth rotary table (54) of the central shaft gripping component (5) drives the central shaft (8) and the spiral blade (7) to rotate at a constant speed synchronously. The relative position of the spiral blade (7) and the central shaft (8) remains unchanged. Under the drive of the feed component (4), the welding component (3) moves along the central axis of the central shaft (8) and welds one side of the root of the spiral blade (7) to the central shaft (8). S6. The No. 3 rotary cylinder (32) of the welding assembly (3) rotates 90 degrees, driving the welding gun (34) to rotate 90 degrees. The No. 2 rotary worktable (26) of the flipping assembly (2) drives the spiral blade (7) to rotate at a constant speed. The No. 5 rotary worktable (54) of the central shaft gripping component (5) drives the central shaft (8) and the spiral blade (7) to rotate at a constant speed synchronously. Under the drive of the feed assembly (4), the welding assembly (3) moves in the opposite direction along the central axis of the central shaft (8) to weld the other side of the root of the spiral blade (7) to the central shaft (8).

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