A bimetallic band saw blade cylindrical tooth tip welding device and method

Abstract

The present invention discloses a bimetallic band saw blade cylindrical tooth tip welding device and method, and relates to the technical field of bimetallic band saw blade welding. A bimetallic band saw blade cylindrical tooth tip welding device comprises: a base, a guide mechanism, a feeding mechanism, a material dividing mechanism, a pick-up and delivery mechanism, a welding head, and a clamping mechanism; the output shaft of the feeding mechanism rotates and drives the material dividing mechanism to perform intermittent material dividing, and the pick-up and delivery mechanism drives the welding head to take the cylindrical tooth tip on the material outlet of the material dividing mechanism, and transports the cylindrical tooth tip to the saw teeth to be welded on the back material for welding. The coordinated use of the guiding mechanism, the feeding mechanism, the material dividing mechanism, the pick-up and delivery mechanism, the welding head and the clamping mechanism of the present invention can replace the existing multi-degree-of-freedom manipulator or multi-axis motion platform to complete the resistance welding of the bimetallic band saw blade tooth tip, so that the automation degree and equipment cost of the resistance welding device are taken into account, and the automation degree and production efficiency of the resistance welding of the bimetallic band saw blade cylindrical tooth tip are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of bimetallic band saw blade welding, and in particular to a bimetallic band saw blade cylindrical tooth tip welding device and method. Background Art

[0002] Bimetallic band saw blades are made by welding high-hardness materials (carbide, high-speed steel) as tooth tips with high elasticity and high toughness backing materials (spring steel), and then undergoing processes such as heat treatment, tooth grinding and tooth separation. Compared with one-piece band saw blades, bimetallic band saw blades are a new type of sawing tool that can significantly save raw materials and energy consumption while meeting high-performance cutting requirements. They have been widely used in machinery manufacturing, metallurgy, chemical industry and other fields.

[0003] Common methods for welding the tooth tips of bimetallic band saw blades are resistance welding and laser welding. Compared with laser welding, resistance welding has the advantages of low cost, high efficiency and simple process. Resistance welding first puts the granular tooth tip material in contact with the tooth part of the backing material and applies a certain pressure, and uses the electric current to generate heat to instantly form a high temperature to melt the contact area, and then cuts off the power and maintains the pressure to form a connection. At present, the tooth tip material has different granular shapes such as spherical, cylindrical, fan-shaped and triangular prism; among them, cylindrical particles are a common and widely used tooth tip material.

[0004] At present, the resistance welding process for the cylindrical tooth tip of bimetallic band saw blades has the problem of difficulty in balancing the degree of automation and equipment cost; for example, the resistance welding process for the cylindrical tooth tip of bimetallic band saw blades usually uses a multi-degree-of-freedom manipulator or a multi-axis motion platform to complete processes such as tooth tip material transportation, material division and material retrieval, welding head movement, back material feeding, positioning, and clamping. Although the degree of automation is high, there are problems such as high price, large size, and large amount of programming, making it difficult to apply to large-scale production; on the contrary, if the above processes are completed manually, problems such as low production efficiency and high labor intensity will arise.

[0005] Therefore, there is an urgent need to invent a bimetallic band saw blade cylindrical tooth tip welding device and method, which can balance the degree of automation and equipment cost, while improving the production efficiency of large-scale manufacturing of bimetallic band saw blades and reducing production costs and labor intensity. Summary of the invention

[0006] The object of the present invention is to provide a bimetallic band saw blade cylindrical tooth tip welding device and method to solve the problem that the existing resistance welding device has difficulty in balancing the degree of automation and equipment cost, as well as low production efficiency.

[0007] The technical solution of the present invention to solve the above technical problems is as follows:

[0008] A bimetallic band saw blade cylindrical tooth tip welding device, comprising: a base, a guide mechanism disposed at both ends of the top of the base and used to place a backing material, a feeding mechanism disposed on the base and used to feed the backing material, a material dividing mechanism disposed on the base and drivingly connected to an output shaft of the feeding mechanism, a pick-up and delivery mechanism disposed on the base and corresponding to a material outlet of the material dividing mechanism, a welding head disposed on a moving end of the pick-up and delivery mechanism, and a clamping mechanism disposed on the base and used to clamp and release the backing material;

[0009] The output shaft of the feeding mechanism rotates and drives the material dividing mechanism to perform intermittent material dividing. The picking and delivering mechanism drives the welding head to pick up the cylindrical tooth tip on the material outlet of the material dividing mechanism, and delivers the cylindrical tooth tip to the saw teeth to be welded on the back material for welding.

[0010] Furthermore, the above-mentioned feeding mechanism includes a fixed vertical plate vertically arranged on the top of the base and parallel to the backing material, a motor mounting seat horizontally and vertically penetrated on the fixed vertical plate, a first motor arranged on the motor mounting seat, a first synchronous wheel arranged on the output shaft of the first motor, a crank arranged at the end of the output shaft of the first motor and close to the backing material, a slide rail laterally arranged on the front side of the fixed vertical plate, a slider slidably arranged on the slide rail, a connecting rod rotatably connected between the crank and the slider, a conical push block movably arranged on the slider and corresponding to the end of the saw tooth to be welded, and a baffle rod arranged on the slider and in contact with the hypotenuse of the conical push block, and the baffle rod is adjacent to the connecting rod.

[0011] Furthermore, when the conical push block is in a vertical state, the oblique edge of the conical push block contacts the blocking rod.

[0012] Furthermore, the above-mentioned material dividing mechanism includes a vertical frame arranged on the top of the base and adjacent to the fixed vertical plate, a funnel arranged on the vertical frame and used to store cylindrical tooth tips, a discharge pipe arranged at the bottom of the funnel and connected to the funnel, a material dividing wheel rotatably arranged on the inner wall of the bottom end of the funnel and corresponding to the discharge pipe, and a second synchronous wheel located on the outer wall of the bottom end of the funnel and connected to the rotating shaft of the material dividing wheel. The funnel is located above the backing material, the rotating shaft of the material dividing wheel passes through the side wall of the funnel and is connected to the second synchronous wheel. The outer edge of the material dividing wheel is provided with a U-shaped groove matching the cylindrical tooth tips, and the second synchronous wheel is connected to the first synchronous wheel through a synchronous belt.

[0013] Furthermore, the above-mentioned picking and delivering mechanism includes a fixed frame arranged on the top of the base and adjacent to the vertical frame, a back plate vertically arranged on the top of the fixed frame and parallel to the back material, a second motor arranged on the back side of the back plate, a rocker located on the front side of the back plate and connected to the output shaft of the second motor, a rocker slide rail rotatably arranged on the front side of the back plate, and a rocker arm slidably arranged on the rocker slide rail and hinged to the rocker arm, an arc-shaped guide groove is opened on the back plate, and a guide rod slidably matched with the arc-shaped guide groove is arranged on the rocker arm, and the welding head is installed at the end of the rocker arm away from the rocker slide rail.

[0014] Furthermore, a notch ring is provided on the rocker, and a photoelectric sensor corresponding to the notch ring is provided on the front side of the back plate. A fan-shaped notch opposite to the arc guide groove is provided on the notch ring, and the central angle of the fan-shaped notch is equal to the central angle of the arc guide groove, and the central angle of the arc guide groove is 90°.

[0015] Furthermore, a semi-cylindrical material taking groove is provided at the end of the welding head away from the swing rod, and an air hole is provided at the bottom center of the semi-cylindrical material taking groove, and a negative pressure suction pipe connected to the air hole is provided inside the welding head.

[0016] Furthermore, the above-mentioned guide mechanism includes two groups of L-shaped bracket groups arranged on the top of the base and symmetrical to each other, a bottom guide wheel arranged between the two groups of L-shaped bracket groups, a first side guide wheel arranged on one L-shaped bracket group, and a second side guide wheel arranged on the other L-shaped bracket group and corresponding to the first side guide wheel, the bottom side of the backing material contacts the outer edge of the bottom guide wheel, and the two sides of the backing material contact the outer edges of the first side guide wheel and the second side guide wheel respectively.

[0017] Furthermore, the above-mentioned clamping mechanism includes a cylinder mounting seat arranged on the top of the base and below the backing material, a cylinder arranged on the inner side of the cylinder mounting seat, a clamping body arranged on the top of the cylinder mounting seat, a wedge block arranged vertically slidingly inside the clamping body and connected to the piston rod of the cylinder, two wedge-shaped sliders located inside the clamping body and respectively slidingly matched with the two sides of the wedge block, and a clamping block arranged on the top of the wedge-shaped slider, the piston rod of the cylinder passes through the bottom wall of the clamping body and is connected to the bottom of the wedge block, and the wedge slider slides laterally with the clamping body.

[0018] The present invention also provides a method for welding a cylindrical tooth tip of a bimetallic band saw blade, comprising the following steps:

[0019] S1. Setting the material taking position and welding position of the welding head: placing the backing material on two guide mechanisms, adjusting the position of the backing material and the taking and feeding mechanism, and making the welding head with the cylindrical tooth tip matched with the arc groove of the sawtooth to be welded on the backing material, and setting this position as the welding position of the welding head;

[0020] Then adjust the pick-up and delivery mechanism so that the welding head contacts and corresponds with the bottom end of the discharge pipe in the material distribution mechanism, and set this position as the material picking position of the welding head;

[0021] S2. Setting the initial position of the pick-up and delivery mechanism: setting the material picking position of the welding head as the initial position of the pick-up and delivery mechanism;

[0022] S3. Setting the initial position of the feeding mechanism and the material dividing mechanism: adjusting the feeding mechanism and making one side of the conical push block contact with the cylindrical tooth tip of the welded saw teeth on the backing material, and at this time, the other side of the conical push block contacts with the stop rod, and this position is set as the initial position of the feeding mechanism;

[0023] The material distribution mechanism is further adjusted so that the U-shaped groove of the material distribution wheel corresponds to the inner bottom of the funnel, the cylindrical tooth tip located in the funnel enters the U-shaped groove, and this position is set as the initial position of the material distribution mechanism;

[0024] S4, feeding and clamping the backing material: start the first motor to rotate one circle, the first motor rotates and drives the crank to rotate, the crank pushes the slider to slide along the slide rail through the connecting rod, and then drives the conical push block to push the backing material to move one tooth pitch;

[0025] The cylinder is further started, and the piston rod of the cylinder pushes the wedge block to slide downward along the inside of the clamping body, thereby driving the two wedge-shaped sliders to move closer and driving the two clamping blocks to clamp the backing material;

[0026] S5. Material distribution of cylindrical tooth tip: The first motor drives the first synchronous wheel to rotate while rotating, and drives the second synchronous wheel to rotate through the synchronous belt, and finally drives the material distribution wheel to rotate one circle. During the rotation process, the material distribution wheel distributes a cylindrical tooth tip to the discharge pipe, and the cylindrical tooth tip enters the semi-cylindrical material trough of the welding head under the action of gravity;

[0027] S6, the welding head picks up, feeds and welds the cylindrical tooth tip: the air hole of the welding head sucks the cylindrical tooth tip under the action of the external negative pressure suction device, the second motor is started to rotate 90 degrees, and the picking and feeding mechanism sends the welding head to the welding position, and welds a saw tooth to be welded on the back material;

[0028] S7, welding head and clamping mechanism reset: after the serrated welding to be welded in step S6 is completed, the pore releases the cylindrical tooth tip, further starts the second motor to rotate 90° in the opposite direction, and enables the pick-up and delivery mechanism to deliver the welding head to the material taking position;

[0029] Start the cylinder, and push the wedge block to slide upward along the inside of the clamping body through the piston rod of the cylinder, thereby driving the two wedge-shaped sliders away and driving the two clamping blocks to release the backing material;

[0030] S8, repeating steps S4 to S7, and sequentially performing resistance welding on the remaining saw teeth to be welded on the backing material until the welding is completed.

[0031] The present invention has the following beneficial effects:

[0032] 1. The bimetallic band saw blade cylindrical tooth tip welding device of the present invention guides the backing material through a guiding mechanism, a feeding mechanism is used for feeding the backing material, a dividing mechanism is used for storing the cylindrical tooth tips and intermittently dividing the cylindrical tooth tips, a picking and delivering mechanism cooperates with a welding head to take out the cylindrical tooth tips at the discharge port of the dividing mechanism, and further transports the cylindrical tooth tips adsorbed by the welding head to the saw tooth position to be welded on the backing material, clamps the backing material through a clamping mechanism and cooperates with the welding head for welding, and the mutual cooperation of the above mechanisms can replace the existing multi-degree-of-freedom manipulator or multi-axis motion platform to complete the resistance welding of the bimetallic band saw blade tooth tips, and has the advantages of small size, simple structure, and easy operation, etc., and can effectively improve the automation degree and production efficiency of the resistance welding of the cylindrical tooth tips of the bimetallic band saw blades, so that the automation degree and equipment cost of the resistance welding device are taken into account, the production cost and labor intensity are reduced, and it can be mass-produced and has strong applicability.

[0033] 2. The present invention sets a feeding mechanism. When the conical push block contacts the cylindrical tooth tip on the welded sawtooth of the backing material, the conical push block contacts the baffle rod. At this time, the conical push block is in a vertical state and the feeding mechanism is in an initial state. When the backing material needs to be fed, the first motor is started. The first motor drives the slider to slide along the slide rail through the crank and the connecting rod, and drives the conical push block to pass the welded sawtooth that needs to be pushed through the slider. Since the conical push block is movably arranged on the slider, the conical push block will automatically reset according to its own gravity and be in a vertical state. When the conical push block contacts the cylindrical tooth tip of the welded sawtooth, it can cooperate with the baffle rod to push the backing material by one tooth pitch, and this is repeated to achieve the feeding of the backing material.

[0034] 3. The present invention provides a material dividing mechanism, and a U-shaped groove is opened on the material dividing wheel. The cylindrical tooth tip in the funnel can enter the U-shaped groove. When the first motor rotates, it will drive the first synchronous wheel to rotate. The first synchronous wheel drives the second synchronous wheel to rotate through the synchronous belt, and then drives the material dividing wheel to rotate. The material dividing wheel transports the cylindrical tooth tip in the U-shaped groove to the discharge pipe, transporting one cylindrical tooth tip at a time, thereby realizing intermittent material dividing.

[0035] 3. The present invention sets a pick-up and delivery mechanism, and the air hole of the welding head can absorb the cylindrical tooth tip coming out of the discharge pipe under the action of an external negative pressure suction device. When the second motor rotates, it will drive the rocker to rotate, and the rocker will drive the guide rod to slide along the arc guide groove of the back plate, and then the rocker will drive the swing arm to slide along the slide rail and change the position of the welding head on the swing arm, and finally the welding head with the cylindrical tooth tip is brought into contact with the arc groove of the sawtooth to be welded on the back material, which is convenient for welding.

[0036] 4. The present invention sets a clamping mechanism, and the piston rod of the cylinder pushes the wedge block to slide up and down along the inside of the clamping body, thereby driving the two wedge-shaped sliders to move away from or close to each other, so that the two clamping blocks can loosen or clamp the backing material. The clamping block is made of copper material, which is connected to the negative electrode of the welding power supply to form the negative electrode of resistance welding. The welding head is connected to the positive electrode of the welding power supply and forms the positive electrode of resistance welding, thereby realizing resistance welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a bimetallic band saw blade cylindrical tooth tip welding device;

[0038] Figure 2 It is a schematic diagram of the local structure of the backing material;

[0039] Figure 3 It is a schematic diagram of the structure of cylindrical tooth tip;

[0040] Figure 4 The schematic diagram of the structure of the guide mechanism;

[0041] Figure 5 It is a structural schematic diagram of the feeding mechanism;

[0042] Figure 6 It is a schematic diagram of the local structure of the feeding mechanism;

[0043] Figure 7 It is a feeding process diagram of the feeding mechanism;

[0044] Figure 8 It is a structural schematic diagram of the material distribution mechanism;

[0045] Fig. 9 It is a schematic diagram of the explosion structure of the material distribution mechanism;

[0046] Fig.10 It is a schematic diagram of the material distribution process of the material distribution mechanism;

[0047] Fig.11 It is a structural diagram of the pick-up and delivery mechanism;

[0048] Fig.12 is a schematic diagram of the structure of the back panel;

[0049] Fig.13 It is a structural schematic diagram of the welding head;

[0050] Fig.14 It is a schematic diagram of the process of taking and feeding materials by the taking mechanism;

[0051] Fig.15 is a structural schematic diagram of the clamping mechanism;

[0052] Fig.16 It is a schematic diagram of the cross-sectional structure of the clamping mechanism.

[0053] In the figure: 1, base; 2, backing material; 21, saw teeth to be welded; 22, arc groove; 3, guide mechanism; 31, L-shaped bracket group; 32, bottom guide wheel; 33, first side guide wheel; 34, second side guide wheel; 4, feeding mechanism; 41, fixed vertical plate; 42, motor mounting seat; 43, first motor; 44, first synchronous wheel; 45, crank; 46, slide rail; 47, slider; 48, connecting rod; 49, conical push block; 410, stop rod; 5, material distribution mechanism; 51, stand; 52, funnel; 53, discharge pipe; 54. Material dividing wheel; 541. U-shaped groove; 55. Second synchronous wheel; 56. Synchronous belt; 6. Pick-up and delivery mechanism; 61. Fixed frame; 62. Back plate; 621. Arc guide groove; 63. Second motor; 64. Rocker; 65. Rocker slide rail; 66. Rocker; 67. Guide rod; 68. Notch ring; 69. Photoelectric sensor; 7. Welding head; 71. Semi-cylindrical material taking trough; 8. Clamping mechanism; 81. Cylinder mounting seat; 82. Cylinder; 83. Clamping body; 84. Wedge block; 85. Wedge slider; 86. Clamping block. DETAILED DESCRIPTION

[0054] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0055] like Figures 1 to 3 As shown, in an embodiment of the present invention, a bimetallic band saw blade cylindrical tooth tip welding device is provided, comprising: a base 1, a guide mechanism 3 arranged at both ends of the top of the base 1 and used to place a backing material 2, the guide mechanism 3 is used to guide the movement of the backing material 2 and can reduce the friction of the backing material 2 during feeding; a feeding mechanism 4 arranged on the base 1 and used to feed the backing material 2, the feeding mechanism 4 is used to feed the backing material 2; a dividing mechanism 5 arranged on the base 1 and connected to the output shaft of the feeding mechanism 4, the dividing mechanism 5 is used to store the cylindrical tooth tip and divide the cylindrical tooth tip ; a pick-up and delivery mechanism 6 is arranged on the base 1 and corresponds to the discharge port of the material distribution mechanism 5, and a welding head 7 is arranged on the movable end of the pick-up and delivery mechanism 6. The pick-up and delivery mechanism 6 cooperates with the welding head 7 to take out the cylindrical tooth tip out of the discharge port on the material distribution mechanism 5. The welding head 7 can adsorb the cylindrical tooth tip with the cooperation of an external negative pressure suction device, and further transport the cylindrical tooth tip adsorbed by the welding head 7 to the position of the saw tooth 21 to be welded on the backing material 2, so as to facilitate resistance welding; and a clamping mechanism 8 is arranged on the base 1 and used for clamping and releasing the backing material 2, and the clamping mechanism 8 is used to clamp and release the backing material 2.

[0056] The output shaft of the feeding mechanism 4 rotates and drives the material dividing mechanism 5 to perform intermittent material dividing, so that material dividing is performed while feeding the backing material 2, and the feeding and dividing are synchronously linked; the picking and delivering mechanism 6 drives the welding head 7 to pick up the cylindrical tooth tip on the material outlet of the material dividing mechanism 5, and transports the cylindrical tooth tip to the saw teeth 21 to be welded on the backing material 2 for welding. In this embodiment, the feeding mechanism 4, the material dividing mechanism 5, the picking and delivering mechanism 6 and the welding head 7 are all located on the same side. Through the mutual cooperation of the feeding mechanism 4, the material dividing mechanism 5, the picking and delivering mechanism 6, the welding head 7, and the clamping mechanism 8, the resistance welding of the cylindrical tooth tip of the bimetallic band saw blade can be completed by replacing the existing multi-degree-of-freedom manipulator or multi-axis motion platform, which has the advantages of simple structure, easy operation, good versatility, etc.

[0057] In this embodiment, the backing material 2 is placed horizontally on two guide mechanisms 3, and the saw teeth 21 to be welded of the backing material 2 are arranged upward, the saw teeth with cylindrical tooth tips are welded, and the saw teeth 21 to be welded are not welded with cylindrical tooth tips. The material of the backing material 2 is preferably spring steel, the thickness of the backing material 2 is P, and the tooth pitch is a. The end of the saw teeth 21 to be welded of the backing material 2 is provided with an arc groove 22 for easy welding with the cylindrical tooth tip; wherein, the diameter of the cylindrical tooth tip is D, the height is H, and H>D>P is satisfied, preferably H=1.5D=2P; the material of the cylindrical tooth tip is preferably cemented carbide or high-speed steel.

[0058] like Figure 4 As shown, the guide mechanism 3 includes two groups of L-shaped bracket groups 31 arranged on the top of the base 1 and symmetrical to each other; a bottom guide wheel 32 arranged between the two groups of L-shaped bracket groups 31, the bottom guide wheel 32 includes a bottom guide wheel seat connected between the two groups of L-shaped bracket groups 31, and a guide wheel rotatably mounted on the bottom guide wheel seat, the bottom side of the backing material 2 contacts the outer edge of the bottom guide wheel 32, that is, contacts the outer edge of the guide wheel, and the bottom guide wheel 32 supports the backing material 2; a first side guide wheel 33 arranged on one L-shaped bracket group 31, and a second side guide wheel 34 arranged on the other L-shaped bracket group 31 and corresponding to the first side guide wheel 33, the first side guide wheel 33 and the second side guide wheel 34 have the same structure, both include a side guide wheel seat fixed on the L-shaped bracket group 31, and a side guide wheel rotatably arranged on the side guide wheel seat, the two sides of the backing material 2 contact the outer edges of the first side guide wheel 33 and the second side guide wheel 34 respectively; in this embodiment, the gap between the first side guide wheel 33 and the second side guide wheel 34 is greater than the thickness P of the backing material 2. The bottom guide wheel 32 cooperates with the two side guide wheels to constrain the movement of the backing material 2 and reduce the friction force when the backing material 2 moves.

[0059] like Figures 5 to 7As shown, the feeding mechanism 4 includes a fixed vertical plate 41 vertically arranged on the top of the base 1 and parallel to the backing material 2, and the fixed vertical plate 41 is located on one side of the backing material 2; a motor mounting seat 42 horizontally and vertically penetrated on the fixed vertical plate 41, and an opening for mounting the motor mounting seat 42 is opened on the fixed vertical plate 41, and the motor mounting seat 42 passes through the opening and is connected to the fixed vertical plate 41 by screws; a first motor 43 is arranged on the motor mounting seat 42, and the output shaft of the first motor 43 passes through the opening on the fixed vertical plate 41 and extends out from the front side of the fixed vertical plate 41; a first synchronous wheel 44 is arranged on the output shaft of the first motor 43, and the first synchronous wheel 44 is fixed on the output shaft of the first motor 43; a first synchronous wheel 44 is arranged at the end of the output shaft of the first motor 43 and close to the backing material 2 A crank 45, a slide rail 46 disposed transversely on the front side of the fixed vertical plate 41, a slider 47 slidably disposed on the slide rail 46, a connecting rod 48 rotatably connected between the crank 45 and the slider 47, the two ends of the connecting rod 48 are hinged with the crank 45 and the slider 47 to achieve rotation, and can also achieve rotation through the shaft hole; a conical push block 49 movably disposed on the slider 47 and corresponding to the end of the sawtooth 21 to be welded, a fixed pin is vertically disposed on the side of the slider 47 close to the backing material 2, the conical push block 49 is sleeved on the fixed pin, and a shaft hole is opened on the conical push block 49, the hole diameter of which is larger than the diameter of the fixed pin; and a stopper 410 disposed on the slider 47 and in contact with the hypotenuse of the conical push block 49, the stopper 410 is adjacent to the connecting rod 48. In this embodiment, the side of the fixed vertical plate 41 close to the backing material 2 is the front side, and the opposite side is the back side (rear side). When the conical push block 49 is in a vertical state, the oblique edge of the conical push block 49 contacts the blocking rod 410 .

[0060] The connection between the crank 45 and the first motor 43 is the first rotating pair, the rotation position of the crank 45 and the connecting rod 48 is the second rotating pair, and the center distance between the first rotating pair and the second rotating pair of the crank 45 is b; the rotation position of the connecting rod 48 and the crank 45 is the first rotating pair, the rotation position of the connecting rod 48 and the slider 47 is the second rotating pair, and the center distance between the first rotating pair and the second rotating pair of the connecting rod 48 is c; the vertical distance between the first rotating pair of the crank 45 and the center of the rotating pair of the conical push block 49 is d; the vertical distance between the second rotating pair of the connecting rod 48 and the top of the welded sawtooth of the backing material 2 is e; the vertical distance between the second rotating pair of the connecting rod 48 and the bottom of the tooth portion of the backing material 2 is f; the vertical distance between the rotating pair of the conical push block 49 and the sawtooth 21 to be welded on the backing material 2 is g, and the following geometric relationship is satisfied:

[0061]

[0062] c>d>b

[0063] f>g>e

[0064] When in use, the conical push block 49 contacts the cylindrical tooth tip on the welded sawtooth of the backing material 2, and at the same time, when the stop rod 410 contacts the hypotenuse of the conical push block 49, the conical push block 49 is in a vertical state, and the feeding mechanism 4 is in an initial state at this time; when the backing material 2 needs to be fed, the first motor 43 is started, and the first motor 43 drives the slider 47 to slide along the slide rail 46 through the crank 45 and the connecting rod 48, and makes the bottom end of the conical push block 49 pass over the welded sawtooth that needs to be pushed, and the conical push block 49 is reset to a vertical state under its own gravity, and the first motor 43 continues to rotate, and drives the slider 47 to slide in the opposite direction along the slide rail 46, further making the side wall of the conical push block 49 contact with the cylindrical tooth tip of the welded sawtooth that needs to be pushed, and the conical push block 49 is limited under the action of the cylindrical tooth tip and the stop rod 410, so that the backing material 2 can be pushed to move a tooth pitch. In this embodiment, the crank 45 rotates one circle, which can push the backing material 2 to feed one tooth pitch, and this is repeated to achieve intermittent feeding of the backing material 2.

[0065] like Figure 1 , Figures 8 to 10 As shown, the material distribution mechanism 5 includes a stand 51 arranged on the top of the base 1 and adjacent to the fixed vertical plate 41, the stand 51 is fixed to the top of the base 1 through a first square tube, the bottom rod diameter of the stand 51 matches the rod diameter of the first square tube, and bolts are passed through the tube wall of the first square tube, the bolts are used to tighten the stand 51, so as to adjust the height of the stand 51 when necessary, and then adjust the height of the material distribution mechanism 5; a funnel 52 arranged on the stand 51 and used to store cylindrical tooth tips, the funnel 52 is located on the side close to the backing material 2, and the funnel 52 is located above the backing material 2; a discharge pipe 53 arranged at the bottom of the funnel 52 and connected to the funnel 52; a material distribution wheel 5 rotatably arranged on the inner wall of the bottom end of the funnel 52 and corresponding to the discharge pipe 53 4, and a second synchronous wheel 55 located on the outer wall of the bottom end of the funnel 52 and connected with the rotating shaft of the dividing wheel 54. A mounting hole for mounting the dividing wheel 54 is provided on the front side of the bottom end of the funnel 52 (i.e., the side away from the stand 51), and the mounting holes are respectively connected with the funnel 52 and the discharge pipe 53. A through hole matching the rotating shaft of the dividing wheel 54 is provided on the back side of the bottom end of the funnel 52 (i.e., the side close to the stand 51) and the rotating shaft of the dividing wheel 54 extends from the through hole on the back side of the funnel 52. The rotating shaft of the dividing wheel 54 passes through the side wall of the funnel 52 and is connected with the second synchronous wheel 55. A U-shaped groove 541 matching the cylindrical tooth tip is provided on the outer edge of the dividing wheel 54. The second synchronous wheel 55 is connected to the first synchronous wheel 44 through a synchronous belt 56. Among them, the depth of the U-shaped groove 541 is V, the opening width of the U-shaped groove 541 is W, the length is U, and it satisfies: H<U≤H+0.5mm, and D≤V=W≤D+0.5mm; the width of the discharge port on the discharge pipe 53 is equal to the opening width of the U-shaped groove 541, and the length of the discharge port on the discharge pipe 53 is equal to the length of the U-shaped groove 541.

[0066] The cylindrical tooth tips in the funnel 52 enter the U-shaped groove 541 under the action of gravity. When the first motor 43 rotates, it drives the first synchronous wheel 44 to rotate. The first synchronous wheel 44 drives the second synchronous wheel 55 to rotate through the synchronous belt 56, and then drives the dividing wheel 54 to rotate. When the U-shaped groove 541 on the dividing wheel 54 corresponds to the discharge pipe 53, the cylindrical tooth tips in the U-shaped groove 541 enter the discharge pipe 53 under the action of its own gravity, and the dividing wheel 54 conveys one cylindrical tooth tip at a time, thereby realizing intermittent dividing.

[0067] like Figures 11 to 14 As shown, the pick-up and delivery mechanism 6 includes a fixing frame 61 arranged on the top of the base 1 and adjacent to the stand 51, the fixing frame 61 is fixed to the top of the base 1 through a second square tube, the bottom rod diameter of the fixing frame 61 matches the rod diameter of the second square tube, and bolts are passed through the tube wall of the second square tube, the bolts are used to tighten the fixing frame 61, so as to adjust the height of the fixing frame 61 when necessary; a back plate 62 vertically arranged on the top of the fixing frame 61 and parallel to the back material 2, in this embodiment, one side of the back plate 62 is connected to the side wall of the stand 51 by bolts; a second motor 63 arranged on the back side of the back plate 62, a rocker 64 located on the front side of the back plate 62 and connected to the output shaft of the second motor 63, and the back plate 6 2 is provided with a through hole, the output shaft of the second motor 63 passes through the through hole on the back plate 62 and is connected to the rocker 64, wherein the side of the back plate 62 close to the back material 2 is the front side, and the side away from the back material 2 is the back side; a rocker slide rail 65 is rotatably arranged on the front side of the back plate 62, and an axle rod is fixed to the side of the rocker slide rail 65 close to the back plate 62, and a rotating hole matching the axle rod is provided on the back plate 62, and rotation is achieved through the cooperation of the axle hole; and a rocker 66 is slidably arranged on the rocker slide rail 65 and hinged to the rocker 64, an arc guide groove 621 is provided on the back plate 62, and a guide rod 67 slidably matched with the arc guide groove 621 is provided on the rocker 64, and the welding head 7 is installed at the end of the rocker 66 away from the rocker slide rail 65. A notch ring 68 is provided on the rocker 64, and the notch ring 68 is fixed on the side of the rocker 64 close to the back plate 62. A photoelectric sensor 69 corresponding to the notch ring 68 is provided on the front side of the back plate 62. The specific model of the photoelectric sensor 69 is EE-SX1320. The photoelectric sensor 69 cooperates with the notch ring 68 to sense and control the position of the rocker 64; a fan-shaped notch opposite to the arc guide groove 621 is provided on the notch ring 68, and the central angle of the fan-shaped notch is equal to the central angle of the arc guide groove 621, and the central angle of the arc guide groove 621 is 90°; the arc guide groove 621 in this embodiment is arranged vertically, and the rotation axis of the arc guide groove 621 coincides with the rotation axis of the rocker 64 and also coincides with the rotation axis of the notch ring 68.

[0068] A semi-cylindrical material taking groove 71 is provided at the end of the welding head 7 away from the swing rod 66, and an air hole is provided at the bottom center of the semi-cylindrical material taking groove 71. A negative pressure suction pipe connected to the air hole is provided inside the welding head 7, and the negative pressure suction pipe is connected to an external negative pressure suction device to provide negative pressure attraction for the air hole. The welding head 7 is a resistance welding head, the main body of the resistance welding head is made of copper, and the part with the semi-cylindrical material taking groove 71 is tungsten. The welding head 7 is connected to the positive electrode of the welding power supply, and the welding head 7 is installed on the swing rod 66 through an insulating connector (preferably an industrial ceramic connector such as alumina ceramic, zirconia ceramic, silicon carbide ceramic, etc.) to form a positive electrode for resistance welding. In this embodiment, the size of the semi-cylindrical material taking groove 71 is equal to the size of the discharge port on the discharge pipe 53, and the diameter of the air hole is smaller than the width of the semi-cylindrical material taking groove 71.

[0069] When taking materials, the second motor 63 starts and drives the rocker 64 to rotate, the rocker 64 rotates and drives the guide rod 67 to move along the arc-shaped guide groove 621, and the rocker 64 will also drive the welding head 7 on the swing rod 66 to move, the guide rod 67 is used for guiding, when the guide rod 67 moves to the top of the arc-shaped guide groove 621, the semi-cylindrical material taking groove 71 of the welding head 7 corresponds to the discharge port of the discharge pipe 53, and the air hole on the welding head 7 can absorb the cylindrical tooth tip. When feeding, the second motor 63 rotates in the opposite direction and drives the rocker 64 to rotate, thereby driving the welding head 7 on the swing rod 66 to move and change the position of the welding head 7, when the guide rod 67 moves to the bottom of the arc-shaped guide groove 621, the welding head 7 corresponds to the saw teeth 21 to be welded on the backing material 2, and then the cylindrical tooth tip is transported to the saw teeth 21 to be welded on the backing material 2 for resistance welding.

[0070] like Fig.15 and Fig.16As shown, the clamping mechanism 8 includes a cylinder mounting seat 81 arranged on the top of the base 1 and located below the backing material 2, and the cylinder mounting seat 81 is fixed to the base 1 by screws; a cylinder 82 arranged on the inner side of the cylinder mounting seat 81, and the cylinder 82 is fixed to the cylinder mounting seat 81 by screws, and a through hole is opened on the top of the cylinder mounting seat 81, and the piston rod of the cylinder 82 extends out from the through hole on the top of the cylinder mounting seat 81; a clamp body 83 arranged on the top of the cylinder mounting seat 81, and the clamp body 83 is a rectangular parallelepiped structure as a whole, and the inside of the clamp body 83 is hollow and has an opening on the top; a wedge block 84 vertically slidably arranged inside the clamp body 83 and connected to the piston rod of the cylinder 82, and the piston rod of the cylinder 82 passes through the bottom wall of the clamp body 83 and is connected to the bottom of the wedge block 84. Specifically, the clamp The bottom wall of the body 83 is provided with a through hole for the piston rod of the cylinder 82 to pass through, and the wedge block 84 can slide up and down in the clamp body 83 under the push of the cylinder 82; two wedge sliders 85 are located inside the clamp body 83 and are respectively slidably matched with the two sides of the wedge block 84, and the opposite side walls of the two wedge sliders 85 are provided with T-shaped long blocks, and the two sides of the wedge block 84 are respectively provided with T-shaped grooves that are slidably matched with the T-shaped long blocks on the wedge sliders 85, and the up and down movement of the wedge block 84 drives the two wedge sliders 85 to move away from or close to each other; the wedge slider 85 is laterally slidably matched with the clamp body 83, the size of the wedge slider 85 matches the internal size of the clamp body 83, and the top surface of the wedge slider 85 is flush with the top surface of the clamp body 83; and a clamping block 86 is arranged on the top of the wedge slider 85.

[0071] Start the cylinder 82, and the piston rod of the cylinder 82 drives the wedge block 84 to slide up and down in the clamp body 83, thereby driving the two wedge-shaped sliders 85 to move away from or close to each other, and finally realize the two clamp blocks 86 to move away from or close to each other, so as to facilitate the loosening and clamping of the backing material 2. In this embodiment, the clamp body 83, the wedge block 84, and the wedge-shaped slider 85 are insulating materials, preferably industrial ceramics such as alumina ceramics, zirconia ceramics, and silicon carbide ceramics; the clamp block 86 is made of copper material, which is connected to the negative electrode of the welding power supply to form the negative electrode of the resistance welding; and the height of the top surface of the clamp body 83 from the top of the base 1 is equal to the height of the top surface of the bottom guide wheel 32 from the top surface of the base 1.

[0072] Another embodiment of the present invention provides a method for welding cylindrical tooth tips of bimetallic band saw blades, comprising the following steps:

[0073] S1. Setting the material taking position and welding position of the welding head 7: placing the backing material 2 on the two guide mechanisms 3, adjusting the position of the backing material 2 and the taking and delivering mechanism 6, and making the welding head 7 with the cylindrical tooth tip matched with the arc groove 22 of the saw teeth 21 to be welded on the backing material 2, and setting this position as the welding position of the welding head 7;

[0074] Then adjust the pick-up and delivery mechanism 6 so that the welding head 7 contacts and corresponds with the bottom end of the discharge pipe 53 in the material distribution mechanism 5, and set this position as the material picking position of the welding head 7;

[0075] S2, setting the initial position of the pick-up and delivery mechanism 6: setting the material picking position of the welding head 7 to the initial position of the pick-up and delivery mechanism 6;

[0076] S3, setting the initial position of the feeding mechanism 4 and the material dividing mechanism 5: adjusting the feeding mechanism 4 and making one side of the conical push block 49 contact with the cylindrical tooth tip of the welded saw teeth on the backing material 2, at this time, the other side of the conical push block 49 contacts with the stop rod 410, and this position is set as the initial position of the feeding mechanism 4;

[0077] The material distribution mechanism 5 is further adjusted so that the U-shaped groove 541 of the material distribution wheel 54 corresponds to the inner bottom of the funnel 52, the cylindrical tooth tip located in the funnel 52 enters the U-shaped groove 541, and this position is set as the initial position of the material distribution mechanism 5;

[0078] S4, feeding and clamping the backing material 2: start the first motor 43 to rotate one circle, the first motor 43 rotates and drives the crank 45 to rotate, the crank 45 pushes the slider 47 to slide along the slide rail 46 through the connecting rod 48, and then drives the conical push block 49 to push the backing material 2 to move one tooth pitch;

[0079] The cylinder 82 is further started, and the piston rod of the cylinder 82 pushes the wedge block 84 to slide downward along the inside of the clamp body 83, thereby driving the two wedge slide blocks 85 to move closer, and driving the two clamp blocks 86 to clamp the backing material 2;

[0080] S5, material distribution of cylindrical tooth tips: the first motor 43 rotates while driving the first synchronous wheel 44 to rotate, and drives the second synchronous wheel 55 to rotate through the synchronous belt 56, and finally drives the material distribution wheel 54 to rotate one circle. During the rotation process, the material distribution wheel 54 distributes a cylindrical tooth tip to the discharge pipe 53, and the cylindrical tooth tip enters the semi-cylindrical material trough 71 of the welding head 7 under the action of gravity;

[0081] S6, the welding head 7 takes, feeds and welds the cylindrical tooth tip: the air hole of the welding head 7 sucks the cylindrical tooth tip under the action of the external negative pressure suction device, the second motor 63 is started to rotate 90 degrees, and the taking and feeding mechanism 6 sends the welding head 7 to the welding position, and welds a saw tooth 21 to be welded on the back material 2;

[0082] S7, the welding head 7 and the clamping mechanism 8 are reset: after the welding of the sawtooth 21 to be welded in step S6 is completed, the pore releases the cylindrical tooth tip, and the second motor 63 is further started to rotate 90° in the opposite direction, and the fetching and feeding mechanism 6 sends the welding head 7 to the material fetching position;

[0083] Start the cylinder 82, and push the wedge block 84 to slide upward along the inside of the clamp body 83 through the piston rod of the cylinder 82, thereby driving the two wedge-shaped sliders 85 away and driving the two clamp blocks 86 to release the backing material 2;

[0084] S8, repeating steps S4 to S7, and sequentially performing resistance welding on the remaining serrations 21 to be welded on the backing material 2 until the welding is completed.

[0085] The present invention can replace the existing multi-degree-of-freedom manipulator or multi-axis motion platform to complete the resistance welding of the cylindrical tooth tips of bimetallic band saw blades through the mutual cooperation of the feeding mechanism 4, the dividing mechanism 5, the picking and delivering mechanism 6, the welding head 7, and the clamping mechanism 8. It has the advantages of small size, simple structure, and easy operation. It can effectively improve the automation level and production efficiency of the resistance welding of the cylindrical tooth tips of bimetallic band saw blades, so that the automation level and equipment cost of the resistance welding device are taken into account, the production cost and labor intensity are reduced, and mass production is possible.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bimetallic band saw blade cylindrical tooth tip welding device, characterized in that: include: A base (1), a guide mechanism (3) arranged at both ends of the top of the base (1) and used to place a backing material (2), a feeding mechanism (4) arranged on the base (1) and used to feed the backing material (2), a material distribution mechanism (5) arranged on the base (1) and connected to the output shaft of the feeding mechanism (4), a pick-up and delivery mechanism (6) arranged on the base (1) and corresponding to the material outlet of the pick-up and delivery mechanism (5), a welding head (7) arranged on the moving end of the pick-up and delivery mechanism (6), and a clamping mechanism (8) arranged on the base (1) and used to clamp and release the backing material (2); The output shaft of the feeding mechanism (4) rotates and drives the material distribution mechanism (5) to perform intermittent material distribution, and the picking and delivering mechanism (6) drives the welding head (7) to pick up the cylindrical tooth tip on the material outlet of the material distribution mechanism (5), and delivers the cylindrical tooth tip to the saw teeth (21) to be welded on the backing material (2) for welding; The feeding mechanism (4) comprises a fixed vertical plate (41) vertically arranged on the top of the base (1) and parallel to the backing material (2), a motor mounting seat (42) horizontally and vertically penetrated on the fixed vertical plate (41), a first motor (43) arranged on the motor mounting seat (42), a first synchronous wheel (44) arranged on the output shaft of the first motor (43), a crank (45) arranged at the end of the output shaft of the first motor (43) and close to the backing material (2), and a crank (45) arranged transversely on the A slide rail (46) is fixed on the front side of the vertical plate (41), a slider (47) is slidably arranged on the slide rail (46), a connecting rod (48) is rotatably connected between the crank (45) and the slider (47), a conical push block (49) is movably arranged on the slider (47) and corresponds to the end of the saw tooth (21) to be welded, and a stop rod (410) is arranged on the slider (47) and contacts the oblique edge of the conical push block (49), and the stop rod (410) is adjacent to the connecting rod (48).

2. The bimetallic band saw blade cylindrical tooth tip welding device according to claim 1, characterized in that: When the conical push block (49) is in a vertical state, the oblique edge of the conical push block (49) contacts the blocking rod (410).

3. The bimetallic band saw blade cylindrical tooth tip welding device according to claim 1, characterized in that: The material distribution mechanism (5) comprises a stand (51) arranged on the top of the base (1) and adjacent to the fixed vertical plate (41), a funnel (52) arranged on the stand (51) and used to store cylindrical tooth tips, a discharge pipe (53) arranged at the bottom of the funnel (52) and connected to the funnel (52), a material distribution wheel (54) rotatably arranged on the inner wall of the bottom end of the funnel (52) and corresponding to the discharge pipe (53), and a material distribution wheel (54) at the bottom of the funnel (52). The second synchronous wheel (55) is connected to the outer wall of the end and cooperates with the rotating shaft of the dividing wheel (54), the funnel (52) is located above the backing material (2), the rotating shaft of the dividing wheel (54) passes through the side wall of the funnel (52) and is cooperated with the second synchronous wheel (55), the outer edge of the dividing wheel (54) is provided with a U-shaped groove (541) matching the cylindrical tooth tip, and the second synchronous wheel (55) is connected to the first synchronous wheel (44) through a synchronous belt (56).

4. The bimetallic band saw blade cylindrical tooth tip welding device according to claim 3, characterized in that: The pick-up and delivery mechanism (6) includes a fixed frame (61) arranged on the top of the base (1) and adjacent to the stand (51), a back plate (62) vertically arranged on the top of the fixed frame (61) and parallel to the back material (2), a second motor (63) arranged on the back side of the back plate (62), a rocker (64) located on the front side of the back plate (62) and connected to the output shaft of the second motor (63), a rocker slide rail (65) rotatably arranged on the front side of the back plate (62), and a rocker (66) slidably arranged on the rocker slide rail (65) and hinged to the rocker (64), an arc-shaped guide groove (621) is provided on the back plate (62), and a guide rod (67) slidably matched with the arc-shaped guide groove (621) is provided on the rocker (64), and the welding head (7) is installed at the end of the rocker (66) away from the rocker slide rail (65).

5. The bimetallic band saw blade cylindrical tooth tip welding device according to claim 4, characterized in that: The rocker (64) is provided with a notch ring (68), the front side of the back plate (62) is provided with a photoelectric sensor (69) corresponding to the notch ring (68), the notch ring (68) is provided with a fan-shaped notch opposite to the arc-shaped guide groove (621), and the central angle of the fan-shaped notch is equal to the central angle of the arc-shaped guide groove (621), and the central angle of the arc-shaped guide groove (621) is 90°.

6. The bimetallic band saw blade cylindrical tooth tip welding device according to claim 4, characterized in that: A semi-cylindrical material taking groove (71) is provided at the end of the welding head (7) away from the swing rod (66), and an air hole is provided at the bottom center of the semi-cylindrical material taking groove (71), and a negative pressure suction pipe connected to the air hole is provided inside the welding head (7).

7. The bimetallic band saw blade cylindrical tooth tip welding device according to claim 1, characterized in that: The guide mechanism (3) comprises two groups of L-shaped bracket groups (31) arranged on the top of the base (1) and symmetrical to each other, a bottom guide wheel (32) arranged between the two groups of L-shaped bracket groups (31), a first side guide wheel (33) arranged on one L-shaped bracket group (31), and a second side guide wheel (34) arranged on the other L-shaped bracket group (31) and corresponding to the first side guide wheel (33), the bottom side of the backing material (2) contacts the outer edge of the bottom guide wheel (32), and the two sides of the backing material (2) contact the outer edges of the first side guide wheel (33) and the second side guide wheel (34) respectively.

8. The bimetallic band saw blade cylindrical tooth tip welding device according to any one of claims 4 to 6, characterized in that: The clamping mechanism (8) comprises a cylinder mounting seat (81) arranged on the top of the base (1) and located below the backing material (2), a cylinder (82) arranged inside the cylinder mounting seat (81), a clamping body (83) arranged on the top of the cylinder mounting seat (81), a wedge block (84) arranged vertically slidably inside the clamping body (83) and connected to the piston rod of the cylinder (82), two wedge-shaped sliding blocks (85) located inside the clamping body (83) and respectively slidingly matched with the two sides of the wedge block (84), and a clamping block (86) arranged on the top of the wedge-shaped sliding block (85), the piston rod of the cylinder (82) passes through the bottom wall of the clamping body (83) and is connected to the bottom of the wedge block (84), and the wedge-shaped sliding block (85) is laterally slidingly matched with the clamping body (83).

9. A method for welding cylindrical tooth tips of bimetallic band saw blades, characterized in that: The welding is performed using the bimetallic band saw blade cylindrical tooth tip welding device as claimed in claim 8, comprising the following steps: S1, setting the material taking position and welding position of the welding head (7): placing the backing material (2) on the two guide mechanisms (3), adjusting the position of the backing material (2) and the taking and delivering mechanism (6), and making the welding head (7) with the cylindrical tooth tip matched with the arc groove (22) of the saw teeth (21) to be welded on the backing material (2) to be contacted, and setting this position as the welding position of the welding head (7); Then, the pick-up and delivery mechanism (6) is adjusted so that the welding head (7) contacts and corresponds with the bottom end of the discharge pipe (53) in the material distribution mechanism (5), and this position is set as the material picking position of the welding head (7); S2, setting the initial position of the pick-up and delivery mechanism (6): setting the material picking position of the welding head (7) to the initial position of the pick-up and delivery mechanism (6); S3, setting the initial position of the feeding mechanism (4) and the material distribution mechanism (5): adjusting the feeding mechanism (4) and making one side of the conical push block (49) contact with the cylindrical tooth tip of the welded saw teeth on the backing material (2), and at this time, the other side of the conical push block (49) contacts with the stop rod (410), and setting this position as the initial position of the feeding mechanism (4); The material distribution mechanism (5) is further adjusted so that the U-shaped groove (541) of the material distribution wheel (54) corresponds to the inner bottom of the funnel (52), the cylindrical tooth tip located in the funnel (52) enters the U-shaped groove (541), and this position is set as the initial position of the material distribution mechanism (5); S4, feeding and clamping the backing material (2): starting the first motor (43) to rotate one circle, the first motor (43) rotates and drives the crank (45) to rotate, the crank (45) pushes the slider (47) to slide along the slide rail (46) through the connecting rod (48), and then drives the conical push block (49) to push the backing material (2) to move one tooth pitch; The cylinder (82) is further activated, and the piston rod of the cylinder (82) pushes the wedge block (84) to slide downward along the inside of the clamp body (83), thereby driving the two wedge slide blocks (85) to move closer together, and driving the two clamp blocks (86) to clamp the backing material (2); S5, material distribution of cylindrical tooth tips: the first motor (43) rotates while driving the first synchronous wheel (44) to rotate, and drives the second synchronous wheel (55) to rotate through the synchronous belt (56), and finally drives the material distribution wheel (54) to rotate one circle. During the rotation process, the material distribution wheel (54) distributes a cylindrical tooth tip to the material discharge pipe (53), and the cylindrical tooth tip enters the semi-cylindrical material trough (71) of the welding head (7) under the action of gravity; S6, the welding head (7) picks up, feeds and welds the cylindrical tooth tip: the air hole of the welding head (7) sucks the cylindrical tooth tip under the action of the external negative pressure suction device, the second motor (63) is started to rotate 90 degrees, and the pick-up and feeding mechanism (6) sends the welding head (7) to the welding position, and welds a saw tooth (21) to be welded on the backing material (2); S7, the welding head (7) and the clamping mechanism (8) are reset: after the welding of the saw teeth (21) to be welded in step S6 is completed, the air hole releases the cylindrical tooth tip, and the second motor (63) is further started to rotate 90 degrees in the opposite direction, and the pick-up and delivery mechanism (6) delivers the welding head (7) to the material taking position; The cylinder (82) is started, and the piston rod of the cylinder (82) pushes the wedge block (84) to slide upward along the inside of the clamp body (83), thereby driving the two wedge slide blocks (85) away from each other and driving the two clamp blocks (86) to release the backing material (2); S8, repeating steps S4 to S7, and sequentially performing resistance welding on the remaining saw teeth (21) to be welded on the backing material (2), until the welding is completed.

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