A bimetallic band saw blade spherical tooth tip resistance welding device and method

Abstract

The present invention discloses a bimetallic band saw blade spherical tooth tip resistance welding device and method, and relates to the technical field of bimetallic band saw blade welding. A bimetallic band saw blade spherical tooth tip resistance welding device comprises: a base, a backing material guide mechanism, a material storage mechanism, a material distribution mechanism, a pick-up and delivery mechanism, a welding head, and a feeding clamping mechanism; the pick-up and delivery mechanism drives the welding head to pick up the spherical tooth tip on the material outlet of the material distribution mechanism, and transport the spherical tooth tip to the backing material to be welded for welding. The backing material guide mechanism of the present invention guides the backing material, the material storage mechanism is used to store the spherical tooth tip, the material distribution mechanism distributes the spherical tooth tip, the pick-up and delivery mechanism cooperates with the welding head to take out the spherical tooth tip at the material outlet on the material distribution mechanism, and further transports the spherical tooth tip adsorbed by the welding head to the backing material to be welded The serration position of the backing material is welded, and the backing material is clamped and fed by the feeding clamping mechanism; the automation degree and production efficiency of the bimetallic band saw blade spherical tooth tip resistance welding 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 spherical tooth tip resistance welding device and method. Background Art

[0002] Bimetallic band saw blades are made by welding high-hardness tooth tips with high-elasticity and high-strength backing materials, and then undergoing heat treatment, tooth adjustment and tooth separation. Compared with one-piece band saw blades, bimetallic band saw blades can not only meet high-performance cutting requirements, but also save manufacturing costs. They have been widely used in engineering fields such as machinery, metallurgy, and construction.

[0003] Resistance welding and laser welding are commonly used methods for welding the tooth tips of bimetallic band saw blades. Compared with laser welding, resistance welding has the advantages of high efficiency, low cost and simple process. At present, the tooth tip material has different granular shapes, including cylindrical, spherical and fan-shaped; among them, spherical tooth tips are more common and widely used.

[0004] At present, the resistance welding of the spherical tooth tip of bimetallic band saw blades uses a multi-axis motion platform or a multi-degree-of-freedom manipulator to complete the steps of dividing and picking the tooth tip material, feeding, positioning and clamping the back material, and moving the welding head. It has the disadvantages of high equipment cost, large size, and complex programming, and is difficult to apply to mass production. On the contrary, if the above steps are completed manually, it will cause problems such as low degree of automation, low production efficiency, and high labor intensity.

[0005] Therefore, there is an urgent need to invent a bimetallic band saw blade spherical tooth tip resistance welding device and method to improve the automation level and production efficiency of large-scale production of bimetallic band saw blades and reduce labor intensity and production costs. Summary of the invention

[0006] The object of the present invention is to provide a bimetallic band saw blade spherical tooth tip resistance welding device and method to solve the problems of large size, high cost and low production efficiency of existing bimetallic band saw blade spherical tooth tip resistance welding equipment.

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

[0008] A bimetallic band saw blade spherical tooth tip resistance welding device, comprising: a base, a backing material guide mechanism symmetrically arranged at both ends of the top of the base and used to place a backing material, a material storage mechanism arranged on the base, a material distribution mechanism arranged on the material storage mechanism and connected to a material outlet of the material storage mechanism, a fetching and feeding mechanism arranged on the base and corresponding to the material distribution mechanism, a welding head arranged on the moving end of the fetching and feeding mechanism, and a feeding and clamping mechanism arranged on the base and used to clamp and feed the backing material;

[0009] The fetching and delivering mechanism drives the welding head to fetch the spherical tooth tip on the material outlet of the material dividing mechanism, and delivers the spherical tooth tip to the saw teeth to be welded on the backing material for welding.

[0010] Furthermore, the above-mentioned storage mechanism includes a stand arranged on the top of the base and located on one side of the backing material, a funnel arranged on the side wall of the stand and used to store the spherical tooth tips, and a motor bracket arranged on the side of the stand close to the backing material and located below the funnel. The funnel is located above the backing material, and a discharge port matching the spherical tooth tips is opened at the bottom of the funnel.

[0011] Furthermore, the above-mentioned material distributing mechanism includes an L-shaped connecting plate arranged on the motor bracket, a slide plate arranged on the top of the L-shaped connecting plate, a push plate that slides in cooperation with the slide groove in the slide plate, a feed pipe arranged on the top of the slide plate and connected with the discharge port of the funnel, a discharge pipe arranged at the bottom of the slide plate, a first motor arranged on the L-shaped connecting plate, a rotating shaft arranged on the output shaft of the first motor and rotatably matched with the L-shaped connecting plate, and a cylindrical block arranged on the outer wall of the rotating shaft, an annular reciprocating groove is provided on the outer wall of the cylindrical block, a roller that slides in cooperation with the annular reciprocating groove is provided on the bottom wall of the end of the push plate close to the cylindrical block, a distributing hole that matches the spherical tooth tip is provided on the end of the push plate away from the roller, and through holes that are connected with the feed pipe and the discharge pipe are respectively provided on the top and bottom of the slide plate, and the center line of the two through holes and the center line of the distributing hole are located on the same plane;

[0012] The lead of the annular reciprocating groove is N, the center distance between the two through holes at the top and bottom of the slide plate is M, and N=M.

[0013] Furthermore, the above-mentioned back material guiding 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 back material contacts the outer edge of the bottom guide wheel, and the two sides of the back material contact the outer edges of the first side guide wheel and the second side guide wheel respectively.

[0014] Furthermore, the above-mentioned picking and delivering mechanism includes a fixed frame arranged on the base and corresponding to the motor bracket, a vertical plate arranged vertically on the front side of the fixed frame, a second motor arranged on the rear side of the vertical plate, a guide groove plate arranged parallel to the front side of the vertical plate, a rocker rotatably arranged on the front side of the vertical plate and connected to the output shaft of the second motor, a rotating seat arranged on the front side of the vertical plate and adjacent to the guide groove plate, a rocker slide rail arranged on the rotating end of the rotating seat, and a rocker slidably arranged on the rocker slide rail, a curved guide groove is provided on the guide groove plate, a straight guide groove is provided on the rocker, a guide rod slidably matched with the straight guide groove and the curved guide groove is provided at one end of the rocker, and a welding head is installed at the other end of the rocker.

[0015] Furthermore, a cylindrical wheel is arranged at the end of the guide rod away from the rocker arm, and the diameter of the cylindrical wheel is larger than the width of the curved guide groove and the straight guide groove, and the cylindrical wheel is located in the gap between the vertical plate and the guide groove plate.

[0016] Furthermore, a hemispherical 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 hemispherical material taking groove, and a negative pressure suction pipe connected to the air hole is provided inside the welding head.

[0017] Furthermore, the feeding and clamping mechanism comprises a feeding assembly arranged on the base and a clamping assembly arranged on the moving end of the feeding assembly;

[0018] The feeding assembly includes a support plate arranged on the base and located below the backing material, a first cylinder arranged on the support plate, horizontal slide rails symmetrically arranged on the support plate and located on both sides of the first cylinder, a slider slidably arranged on the horizontal slide rails, and a clamp base arranged on the top of all the sliders and connected to the piston rod of the first cylinder, wherein the horizontal slide rails are parallel to the backing material;

[0019] The clamping assembly includes a U-shaped clamp body vertically arranged on the top of the clamp base and located below the backing material, two clamping blocks slidably arranged on the U-shaped clamp body and used to clamp the backing material, a second cylinder arranged at the bottom of the clamp base, and a wedge block located on the inner side of the U-shaped clamp body and slidingly matched with the sides of the two clamping blocks close to each other. The bottom of the wedge block passes through the bottom plate and the support plate of the U-shaped clamp body in sequence and is connected to the piston rod of the second cylinder. The second cylinder drives the wedge block to rise and fall, and the wedge block rises and falls and drives the two clamping blocks to loosen or clamp the backing material.

[0020] The present invention also provides a method for resistance welding of a spherical tooth tip of a bimetallic band saw blade, comprising the following steps:

[0021] S1. Setting the material taking position and welding position of the welding head: placing the backing material on two backing material guide mechanisms, adjusting the position of the backing material and the taking and feeding mechanism, and making the welding head with the spherical tooth tip contact with the arc groove of the saw teeth to be welded on the backing material, and setting this position as the welding position of the welding head;

[0022] Then adjust the pick-up and delivery mechanism so that the welding head contacts and corresponds to the bottom end of the material outlet of the material distribution mechanism, and set this position as the material picking position of the welding head;

[0023] S2, setting the initial position of the material distribution mechanism;

[0024] S3, the material distribution mechanism distributes the spherical tooth tips in the material storage mechanism;

[0025] S4, the feeding clamping mechanism first clamps the backing material, and then feeds the backing material to move one tooth pitch;

[0026] S5, the welding head picks up, feeds and welds the spherical tooth tip: after the welding head sucks the spherical tooth tip, the picking and feeding mechanism sends the welding head to the welding position and welds the saw teeth to be welded on the back material;

[0027] S6, resetting the welding head and the feeding clamping mechanism: after the welding of the sawtooth to be welded in step S5 is completed, the fetching and feeding mechanism and the welding head are reset, and the feeding clamping mechanism is reset after releasing the backing material;

[0028] S7, repeating steps S3 to S6, and performing resistance welding on the remaining saw teeth to be welded on the backing material in sequence until the welding is completed.

[0029] Further, in step S2: when the center line of the material distribution hole on the push plate in the material distribution mechanism coincides with the center line of the through hole on the chute plate connected to the feed pipe, the spherical tooth tip entering the feed pipe from the funnel of the storage mechanism will enter the material distribution hole under the action of gravity, and this is set as the initial position of the material distribution mechanism;

[0030] In step S3: start the first motor in the material distribution mechanism to rotate one circle, and make the push plate push the spherical tooth tip in the material distribution hole into the discharge pipe. The spherical tooth tip pushed into the discharge pipe will roll into the hemispherical material collection groove of the welding head at the material collection position, and the push plate will return to the initial position so that the material distribution mechanism can carry out the next material distribution.

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

[0032] 1. The bimetallic band saw blade spherical tooth tip resistance welding device of the present invention comprises a guide mechanism for guiding the backing material, a storage mechanism for storing the spherical tooth tips, a dividing mechanism for dividing the spherical tooth tips in the storage mechanism, a pick-up and delivery mechanism cooperates with a welding head for taking out the spherical tooth tips at the discharge port on the dividing mechanism, and further delivering the spherical tooth tips adsorbed by the welding head to the sawtooth position to be welded on the backing material for welding, and clamping and feeding the backing material through a feeding clamping mechanism. The above mechanisms cooperate with each other to replace the existing multi-degree-of-freedom manipulator or multi-axis motion platform to complete the resistance welding of the spherical tooth tips of the bimetallic band saw blade, and have the advantages of simple structure, small size, easy operation, good versatility, etc., and can effectively improve the automation degree and production efficiency of the resistance welding of the spherical tooth tips of the bimetallic band saw blade, reduce production costs and labor intensity, and can be mass-produced with strong applicability.

[0033] 2. The present invention sets a material dividing mechanism. When the center line of the material dividing hole on the push plate corresponds to the center line of the through hole connecting the slide plate and the feed pipe, the spherical tooth tip entering the feed pipe from the funnel of the storage mechanism will enter the material dividing hole under the action of gravity; when the first motor rotates, it will drive the rotating shaft and the cylindrical block on the rotating shaft to rotate, and the annular reciprocating groove on the outer wall of the cylindrical block cooperates with the roller, so that the rotation of the cylindrical block will drive the push plate to slide back and forth along the slide groove in the slide groove plate. When the center line of the material dividing hole corresponds to the center line of the through hole connecting the slide groove plate and the discharge pipe, the spherical tooth tip in the material dividing hole enters the discharge pipe and is transported one spherical tooth tip at a time, thereby realizing intermittent material dividing.

[0034] 3. The present invention sets a pick-up and delivery mechanism and a welding head. The negative pressure suction pipe on the welding head is used to connect with an external negative pressure suction device. The air holes of the welding head can absorb the spherical tooth tips coming out of the discharge pipe under the action of the external negative pressure suction device. When the second motor on the pick-up and delivery mechanism rotates, it will drive the rocker to rotate. The rotation of the rocker will push the guide rod to move along the straight guide groove on the rocker and the curved guide groove on the guide groove plate, thereby driving the rocker to slide along the rocker slide rail and changing the position of the welding head on the rocker, so that the welding head with the spherical tooth tip is finally brought into contact with the arc groove of the sawtooth to be welded on the backing material, which is convenient for welding. By adjusting the rotation angle of the rotating shaft of the second motor, the sawtooth to be welded on the backing material with different tooth pitches and different heights can be welded, and the applicability is strong.

[0035] 4. The present invention sets a feeding clamping mechanism, and through the cooperation of a U-shaped clamp body, two clamping blocks, a second cylinder, and a wedge block, the second cylinder can drive the wedge block to rise and fall, and then drive the two clamping blocks to loosen or clamp the backing material, and the stroke of the second cylinder can be adjusted, so that backing materials of different thicknesses can be clamped; the first cylinder can drive the slider at the bottom of the clamp base to slide along the horizontal slide rail, and then drive the clamping assembly and the backing material to move, which is convenient for the feeding of the backing material, and the stroke of the first cylinder can be adjusted, so that backing materials with different tooth pitches can be fed, and the versatility is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of a bimetallic band saw blade spherical tooth tip resistance welding device;

[0037] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0038] Figure 3 It is a structural schematic diagram of the material storage mechanism;

[0039] Figure 4 It is a structural schematic diagram of the material distribution mechanism;

[0040] Figure 5 It is the structural schematic diagram of the cylindrical block;

[0041] Figure 6 It is a schematic diagram of the cross-sectional structure of the slide plate, the push plate, the cylindrical block and the rotating shaft;

[0042] Figure 7 It is a schematic diagram of the process when the material distribution mechanism distributes the spherical tooth tip;

[0043] Figure 8 is a structural schematic diagram of a backing material guiding mechanism;

[0044] Fig. 9 It is a structural diagram of the pick-up and delivery mechanism;

[0045] Fig.10 It is a schematic diagram of the specific structure of the pickup and delivery mechanism;

[0046] Fig.11 It is a structural schematic diagram of the welding head;

[0047] Fig.12 A schematic diagram of the process of the pick-up and delivery mechanism driving the welding head to pick up and deliver materials;

[0048] Fig.13 It is a structural schematic diagram of the feeding clamping mechanism;

[0049] Fig.14 It is a schematic diagram of the clamping assembly clamping the backing material and releasing the backing material.

[0050] In the figure: 1, base; 2, backing material; 21, saw teeth to be welded; 22, arc groove; 3, backing material guide mechanism; 31, L-shaped bracket group; 32, bottom guide wheel; 33, first side guide wheel; 34, second side guide wheel; 4, storage mechanism; 41, stand; 42, funnel; 43, motor bracket; 5, material distribution mechanism; 51, L-shaped connecting plate; 52, slide plate; 521, slide; 53, push plate; 531, material distribution hole; 54, feed pipe; 55, discharge pipe; 56, first motor; 57, rotating shaft; 58, cylindrical block; 581, ring Reciprocating groove; 59, roller; 6, pick-up and delivery mechanism; 61, fixed frame; 62, vertical plate; 63, second motor; 64, guide groove plate; 641, curved guide groove; 65, rocker; 651, straight guide groove; 66, rotating seat; 67, rocker slide rail; 68, rocker; 69, guide rod; 7, welding head; 71, hemispherical material taking trough; 8, feeding clamping mechanism; 81, support plate; 82, first cylinder; 83, horizontal slide rail; 84, slider; 85, fixture base; 86, U-shaped clamp body; 87, clamp block; 88, second cylinder; 89, wedge block. DETAILED DESCRIPTION

[0051] 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.

[0052] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, a bimetallic band saw blade spherical tooth tip resistance welding device is provided, comprising: a base 1, a backing material guide mechanism 3 symmetrically arranged at both ends of the top of the base 1 and used to place a backing material 2, the backing material guide mechanism 3 is used to guide the movement of the backing material 2; a storage mechanism 4 arranged on the base 1, the storage mechanism 4 is used to store the spherical tooth tips; a dividing mechanism 5 arranged on the storage mechanism 4 and connected to the discharge port of the storage mechanism 4, the dividing mechanism 5 is used to divide the spherical tooth tips in the storage mechanism 4; a material distribution mechanism 5 arranged on the base 1 and corresponding to the material distribution mechanism 5 A pick-up and delivery mechanism 6, a welding head 7 arranged on the moving 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 spherical tooth tip at the discharge port on the dividing mechanism 5, and further transports the spherical tooth tip adsorbed by the welding head 7 to the position of the saw teeth 21 to be welded on the back material 2 for welding; and a feeding clamping mechanism 8 arranged on the base 1 and used for clamping and feeding the back material 2, the feeding clamping mechanism 8 is used to clamp and feed the back material 2, so as to facilitate the welding of the saw teeth 21 to be welded on the back material 2 in sequence; the storage mechanism 4, the dividing mechanism 5 and the pick-up and delivery mechanism 6 are all located on the same side.

[0053] Among them, the back material 2 located on the back material guide mechanism 3 is placed horizontally, the serrations 21 to be welded of the back material 2 are arranged upward, and the end of the serrations 21 to be welded of the back material 2 is provided with an arc groove 22 for easy welding with the spherical tooth tip; the thickness of the back material 2 is B, the tooth pitch is C, the material of the back material 2 is preferably spring steel, the diameter of the spherical tooth tip is D, the material of the spherical tooth tip is preferably cemented carbide or high-speed steel, the curvature radius of the arc groove 22 is R, and satisfies 2R=D>B, preferably 2R=D=2B.

[0054] The pick-up and delivery mechanism 6 drives the welding head 7 to pick up the spherical tooth tip on the material outlet of the material distribution mechanism 5, and transports the spherical tooth tip to the saw teeth 21 to be welded on the back material 2 for welding. Through the mutual cooperation of the material distribution mechanism 5, the pick-up and delivery mechanism 6, the welding head 7, and the feeding clamping mechanism 8, the resistance welding of the spherical tooth tip of the bimetallic band saw blade can be replaced by the existing multi-degree-of-freedom manipulator or multi-axis motion platform, which has the advantages of simple structure, easy operation, good versatility, etc.; it can effectively improve the automation degree and production efficiency of the resistance welding of the spherical tooth tip of the bimetallic band saw blade.

[0055] like Figure 8As shown, the backing material 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, and 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 arranged on one L-shaped bracket group 31 33, and a second side guide wheel 34 arranged on another 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 of which 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 are in contact with 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 B 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 also reduce the friction force when the backing material 2 moves.

[0056] like Figures 3 to 7 As shown, the storage mechanism 4 includes a stand 41 arranged on the top of the base 1 and located on one side of the backing material 2, a funnel 42 arranged on the side wall of the stand 41 and used to store the spherical tooth tips, and a motor bracket 43 arranged on the side of the stand 41 close to the backing material 2 and located below the funnel 42, the motor bracket 43 is used to install the material dividing mechanism 5, the funnel 42 is located above the backing material 2, and the bottom of the funnel 42 is provided with a discharge port matching the spherical tooth tips; the spherical tooth tips to be welded are stored in the funnel 42.

[0057] The material dispensing mechanism 5 includes an L-shaped connecting plate 51 arranged on the motor bracket 43, the L-shaped connecting plate 51 being arranged horizontally; a chute plate 52 arranged on the top of the L-shaped connecting plate 51, the chute plate 52 being arranged horizontally, and the bottom of the chute plate 52 being fixed to the top of the L-shaped connecting plate 51; a push plate 53 slidingly matched with a chute 521 in the chute plate 52, the size of the chute 521 matching the size of the push plate 53; a chute plate 53 arranged on the top of the chute plate 52 and connected to the discharge port of the funnel 42 The feed pipe 54 is a straight pipe vertically arranged on the top of the chute plate 52, the top of which is connected to the bottom of the funnel 42, and the feed pipe 54 is connected to the discharge port on the funnel 42; the discharge pipe 55 is arranged at the bottom of the chute plate 52, the discharge pipe 55 is a curved pipe, and the top of the discharge pipe 55 is connected to the chute 521 in the chute plate 52; the first motor 56 is arranged on the L-shaped connecting plate 51, and the first motor 56 is fixed to the L-shaped connecting plate 51 by screws; A rotating shaft 57 is arranged on the output shaft of the first motor 56 and is rotatably matched with the L-shaped connecting plate 51. A shaft hole matching the rotating shaft 57 is provided on the vertical plate of the L-shaped connecting plate 51, so that rotation can be realized; and a cylindrical block 58 is arranged on the outer wall of the rotating shaft 57. An annular reciprocating groove 581 is provided on the outer wall of the cylindrical block 58. A roller 59 slidably matched with the annular reciprocating groove 581 is arranged on the bottom wall of the end of the push plate 53 close to the cylindrical block 58. One end of the push plate 53 is slidably matched with the slide groove 521. The bottom of the other end of the push plate 53 is fixedly connected to the top of the roller 59; the end of the push plate 53 away from the roller 59 is provided with a material distribution hole 531 matching the spherical tooth tip, and the top and bottom of the slide plate 52 are respectively provided with through holes connected to the feed pipe 54 and the discharge pipe 55, and the center lines of the two through holes are located on the same plane as the center line of the material distribution hole 531; the lead of the annular reciprocating groove 581 is N, and the center distance between the two through holes at the top and bottom of the slide plate 52 is M, and N=M. Among them, the height of the slide groove 521 in the slide plate 52 is Q, and the height of the push plate 53 is P, satisfying D<P<Q<2D. The inner diameters of the feed pipe 54 and the discharge pipe 55 are equal to the aperture of the material distribution hole 531, and the above inner diameters are greater than D, preferably D+0.2mm.

[0058] When the center line of the material distribution hole 531 on the push plate 53 coincides with the center line of the through hole at the top of the slide plate 52 connected to the feed pipe 54, the spherical tooth tip is located in the material distribution hole 531, and the push plate 53 is at the initial position at this time; then, the first motor 56 is started, and the rotating shaft of the first motor 56 is rotated half a circle (i.e. 180°), the cylindrical block 58 will push the push plate 53 to slide a distance N in the direction close to the slide plate 52, at this time the center line of the material distribution hole 531 on the push plate 53 coincides with the center line of the through hole at the bottom of the slide plate 52 connected to the discharge pipe 55, the spherical tooth tip enters the discharge pipe 55 under the action of gravity, the rotating shaft of the first motor 56 rotates another half a circle, at this time the push plate 53 slides in the opposite direction away from the slide plate 52 a distance N, the push plate 53 returns to the initial position, so as to continue the material distribution next time, and can perform periodic intermittent material distribution on the spherical tooth tip in the funnel 42.

[0059] like Figures 9 to 12 As shown, the pick-up and delivery mechanism 6 includes a fixing frame 61 arranged on the base 1 and corresponding to the motor bracket 43, a vertical plate 62 arranged vertically on the front side of the fixing frame 61, and a second motor 63 arranged on the rear side of the vertical plate 62, and the second motor 63 is fixed to the rear side of the vertical plate 62 by screws; a guide groove plate 64 arranged in parallel on the front side of the vertical plate 62, the guide groove plate 64 is parallel to the front side of the vertical plate 62, and the guide groove plate 64 and the vertical plate 62 are fixedly connected by a connecting column; a rocker 65 rotatably arranged on the front side of the vertical plate 62 and connected to the output shaft of the second motor 63, and the rocker 65 is connected to the output shaft of the second motor 63 by a connecting shaft. Specifically, a first circular hole is opened on the vertical plate 62, and a second circular hole corresponding to the first circular hole is opened on the guide groove plate 64, and the connecting shaft passes through the guide groove in sequence The second circular hole on the plate 64 and the first circular hole on the vertical plate 62 are connected to the output shaft of the second motor 63; a rotating seat 66 is arranged on the front side of the vertical plate 62 and adjacent to the guide groove plate 64, the rotating seat 66 includes a rotating disc base and a rotating disc, a rotating cavity matching the rotating disc is opened on the rotating disc base, and the rotating disc serves as the rotating end of the rotating seat 66; a rocker slide rail 67 is arranged on the rotating end of the rotating seat 66, and the rocker slide rail 67 is fixed on the rotating disc; and a rocker 68 is slidably arranged on the rocker slide rail 67, a curved guide groove 641 is opened on the guide groove plate 64, a straight guide groove 651 is opened on the rocker 65, one end of the rocker 68 is provided with a guide rod 69 that slidably cooperates with the straight guide groove 651 and the curved guide groove 641, and the welding head 7 is installed at the other end of the rocker 68. Start the second motor 63 to rotate, the second motor 63 will drive the rocker 65 to rotate, the rotation of the rocker 65 will drive the guide rod 69 to slide along the straight guide groove 651 and the curved guide groove 641, the guide rod 69 slides and pushes the rocker 68 to slide along the rocker slide rail 67, and finally changes and adjusts the position of the welding head 7 to realize material picking and feeding.

[0060] In order to prevent the guide rod 69 from disengaging from the curved guide groove 641 when sliding, a cylindrical wheel is provided at the end of the guide rod 69 away from the rocker rod 68, and the diameter of the cylindrical wheel is larger than the width of the curved guide groove 641 and the straight guide groove 651. The cylindrical wheel is located in the gap between the vertical plate 62 and the guide groove plate 64.

[0061] A hemispherical material collection groove 71 is provided at the end of the welding head 7 away from the swing rod 68, and an air hole is provided at the bottom center of the hemispherical material collection groove 71, the diameter of the air hole is smaller than the diameter of the hemispherical material collection groove 71, preferably, the diameter of the air hole is equal to one fifth of the diameter of the hemispherical material collection 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 to the air hole. The welding head 7 is a resistance welding head, the main part of the resistance welding head is made of copper, and the material at the position where the hemispherical material collection groove 71 is set is tungsten; the resistance welding head is connected to the positive electrode of the welding power supply, and is installed at the end of the swing rod 68 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.

[0062] like Fig.13 and Fig.14 As shown, the feeding and clamping mechanism 8 includes a feeding assembly arranged on the base 1 and a clamping assembly arranged on the moving end of the feeding assembly;

[0063] Specifically, the feeding assembly includes a support plate 81 arranged on the base 1 and located below the backing material 2, the support plate 81 being fixed to the top of the base 1 by bolts; a first cylinder 82 arranged on the support plate 81; horizontal slide rails 83 symmetrically arranged on the support plate 81 and located on both sides of the first cylinder 82; a slider 84 slidably arranged on the horizontal slide rail 83; a clamp base 85 arranged on the top of all the sliders 84 and connected to the piston rod of the first cylinder 82, the horizontal slide rail 83 being parallel to the backing material 2; when the piston rod of the first cylinder 82 is extended or retracted, the slider 84 at the bottom of the clamp base 85 can be pushed to slide along the horizontal slide rail 83;

[0064] The clamping assembly includes a U-shaped clamp body 86 vertically arranged on the top of the clamp base 85 and located below the backing material 2; two clamping blocks 87 slidably arranged on the U-shaped clamp body 86 and used to clamp the backing material 2, and the distance between the two straight plates of the U-shaped clamp body 86 matches the size of the clamping blocks 87; a second cylinder 88 arranged at the bottom of the clamp base 85; and a wedge block 89 located on the inner side of the U-shaped clamp body 86 and slidingly matched with the side edges of the two clamping blocks 87 close to each other, and the bottom ends of the side walls of the two clamping blocks 87 close to each other are provided with a wedge block The two sides of the wedge block 89 correspond to the bevels, and the bevels corresponding to the two clamping blocks 87 are provided with tenons along the length direction. The two sides of the wedge block 89 are provided with tenons that slide with the tenons. In this way, when the wedge block 89 is raised or lowered, it can smoothly drive the two clamping blocks 87 to loosen or clamp the backing material 2; the bottom of the wedge block 89 passes through the bottom plate of the U-shaped clamp body 86 and the support plate 81 in sequence and is connected with the piston rod of the second cylinder 88. The second cylinder 88 drives the wedge block 89 to rise and fall, and the wedge block 89 rises and falls and drives the two clamping blocks 87 to loosen or clamp the backing material 2. In order to facilitate the setting of the second cylinder 88 and not interfere with the movement of the feeding assembly, avoidance grooves are provided on the support plate 81 and the base 1 to facilitate the movement of the second cylinder 88.

[0065] The second cylinder 88 is started and drives the wedge block 89 to descend. When the wedge block 89 descends, it drives the two clamping blocks 87 to slide along the U-shaped clamp body 86 and move closer to each other, so as to clamp the backing material 2. At this time, the first cylinder 82 is started. The first cylinder 82 drives the slider 84 at the bottom of the clamp base 85 to slide along the horizontal slide rail 83, thereby driving the clamping assembly on the clamp base 85 to move, and finally driving the backing material 2 to move. When a spherical tooth tip is welded, the second cylinder 88 drives the wedge block 89 to rise, and causes the two clamping blocks 87 to release the backing material 2. The first cylinder 82 is further started to drive the clamp base 85 to reset, thereby driving the clamping assembly to reset, so as to feed the backing material 2 next time.

[0066] The U-shaped clamp body 86 and the wedge block 89 in this embodiment are made of insulating materials, preferably industrial ceramics such as alumina ceramics, zirconia ceramics, and silicon carbide ceramics; the clamp block 87 is made of copper and 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 U-shaped clamp body 86 from the top surface 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.

[0067] Another embodiment of the present invention provides a method for resistance welding a spherical tooth tip of a bimetallic band saw blade, comprising the following steps:

[0068] S1. Setting the material taking position and welding position of the welding head 7: placing the backing material 2 on the two backing material 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 spherical tooth tip cooperate 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;

[0069] Then adjust the pick-up and delivery mechanism 6 so that the welding head 7 contacts and corresponds with the bottom end of the material outlet of the material distribution mechanism 5, and set this position as the material picking position of the welding head 7;

[0070] S2, setting the initial position of the material distribution mechanism 5;

[0071] In step S2: when the center line of the material distribution hole 531 on the push plate 53 in the material distribution mechanism 5 coincides with the center line of the through hole on the chute plate 52 connected to the feed pipe 54, the spherical tooth tip entering the feed pipe 54 from the funnel 42 of the storage mechanism 4 will enter the material distribution hole 531 under the action of gravity, and this is set as the initial position of the material distribution mechanism 5;

[0072] S3, the material distribution mechanism 5 distributes the spherical tooth tips in the material storage mechanism 4;

[0073] In step S3: start the first motor 56 in the material distribution mechanism 5 to rotate one circle, and make the push plate 53 push the spherical tooth tip in the material distribution hole 531 into the discharge pipe 55, the spherical tooth tip pushed into the discharge pipe 55 will roll into the hemispherical material collection groove 71 of the welding head 7 at the material collection position, and the push plate 53 returns to the initial position so that the material distribution mechanism 5 can carry out the next material distribution; and transport one spherical tooth tip at a time, thereby realizing intermittent material distribution; the air holes on the welding head 7 cooperate with the negative pressure suction tube and the external negative pressure suction device to attract the spherical tooth tip.

[0074] S4, the feeding clamping mechanism 8 first clamps the backing material 2, and then feeds the backing material 2 to move one tooth pitch;

[0075] In step S4: start the second cylinder 88, and make the wedge block 89 drive the two clamping blocks 87 to clamp the backing material 2, further start the first cylinder 82 and make the clamp base 85 move along the horizontal slide rail 83, the clamp base 85 drives the clamp assembly to move and drives the backing material 2 to move one tooth pitch;

[0076] S5, the welding head 7 picks up, feeds and welds the spherical tooth tip: after the welding head 7 sucks the spherical tooth tip, the picking and feeding mechanism 6 sends the welding head 7 to the welding position and welds the to-be-welded serrations 21 of the backing material 2;

[0077] The air holes of the welding head 7 attract the spherical tooth tip under the action of the external negative pressure suction device, and the second motor 63 is started to rotate. The output shaft of the second motor 63 will eventually drive the guide rod 69 to slide along the straight guide groove 651 and the curved guide groove 641. The guide rod 69 slides and pushes the rocker bar 68 to slide along the rocker bar slide rail 67, and finally changes and adjusts the position of the welding head 7, and then sends the welding head 7 to the welding position and welds the saw teeth 21 to be welded.

[0078] S6, the welding head 7 and the feeding clamping mechanism 8 are reset: after the welding of the saw teeth 21 to be welded in step S5 is completed, the fetching and feeding mechanism 6 and the welding head 7 are reset, and the feeding clamping mechanism 8 releases the backing material 2 and resets;

[0079] The external negative pressure suction device stops providing negative pressure to the negative pressure suction tube, so that no negative pressure suction is generated at the air hole, and then drives the second motor 63 to rotate in the opposite direction and resets the pick-up and delivery mechanism 6 and the welding head 7. At the same time, starts the second cylinder 88 to drive the wedge block 89 to drive the two clamping blocks 87 to release the backing material 2, starts the first cylinder 82 and causes the feeding assembly to reset the clamping assembly.

[0080] S7, repeating steps S3 to S6, and performing resistance welding on the remaining serrations 21 to be welded on the backing material 2 in sequence until the welding is completed.

[0081] 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 spherical tooth tip resistance welding device, characterized in that: include: A base (1), a backing material guide mechanism (3) symmetrically arranged at both ends of the top of the base (1) and used to place a backing material (2), a material storage mechanism (4) arranged on the base (1), a material distribution mechanism (5) arranged on the material storage mechanism (4) and connected to the material outlet of the material storage mechanism (4), a pick-up and delivery mechanism (6) arranged on the base (1) and corresponding to the material distribution mechanism (5), a welding head (7) arranged on the movable end of the pick-up and delivery mechanism (6), and a feeding and clamping mechanism (8) arranged on the base (1) and used to clamp and feed the backing material (2); The pick-up and delivery mechanism (6) drives the welding head (7) to pick up the spherical tooth tip on the material outlet of the material distribution mechanism (5), and transports the spherical tooth tip to the saw teeth (21) to be welded on the backing material (2) for welding; The material storage mechanism (4) comprises a stand (41) arranged on the top of the base (1) and located on one side of the backing material (2), a funnel (42) arranged on the side wall of the stand (41) and used to store the spherical tooth tips, and a motor bracket (43) arranged on one side of the stand (41) close to the backing material (2) and located below the funnel (42), wherein the funnel (42) is located above the backing material (2), and a discharge port matching the spherical tooth tips is provided at the bottom of the funnel (42); The material dispensing mechanism (5) comprises an L-shaped connecting plate (51) arranged on the motor bracket (43), a slide plate (52) arranged on the top of the L-shaped connecting plate (51), a push plate (53) slidably matched with a slide groove (521) in the slide plate (52), a feed pipe (54) arranged on the top of the slide plate (52) and connected to the discharge port of the funnel (42), a discharge pipe (55) arranged at the bottom of the slide plate (52), a first motor (56) arranged on the L-shaped connecting plate (51), and a rotating shaft (56) arranged on the output shaft of the first motor (56) and rotatably matched with the L-shaped connecting plate (51). 7), and a cylindrical block (58) arranged on the outer wall of the rotating shaft (57), the outer wall of the cylindrical block (58) is provided with an annular reciprocating groove (581), the bottom wall of the end of the push plate (53) close to the cylindrical block (58) is provided with a roller (59) slidably matched with the annular reciprocating groove (581), the end of the push plate (53) away from the roller (59) is provided with a distribution hole (531) matching the spherical tooth tip, the top and bottom of the slide plate (52) are respectively provided with through holes connected to the feed pipe (54) and the discharge pipe (55), and the center lines of the two through holes and the center line of the distribution hole (531) are located on the same plane; The lead of the annular reciprocating groove (581) is N, the center distance between the two through holes at the top and bottom of the slide groove plate (52) is M, and N=M; The pick-up and delivery mechanism (6) comprises a fixing frame (61) arranged on the base (1) and corresponding to the motor bracket (43), a vertical plate (62) arranged vertically on the front side of the fixing frame (61), a second motor (63) arranged on the rear side of the vertical plate (62), a guide groove plate (64) arranged parallel to the front side of the vertical plate (62), a rocker (65) rotatably arranged on the front side of the vertical plate (62) and connected to the output shaft of the second motor (63), and a guide groove plate (64) arranged parallel to the front side of the vertical plate (62). A rotating seat (66) adjacent to the plate (64), a rocker slide rail (67) arranged on the rotating end of the rotating seat (66), and a rocker (68) slidably arranged on the rocker slide rail (67), the guide groove plate (64) is provided with a curved guide groove (641), the rocker (65) is provided with a straight guide groove (651), one end of the rocker (68) is provided with a guide rod (69) slidably matched with the straight guide groove (651) and the curved guide groove (641), and the welding head (7) is installed at the other end of the rocker (68); The feeding and clamping mechanism (8) comprises a feeding component arranged on the base (1) and a clamping component arranged on the moving end of the feeding component; The feeding assembly comprises a support plate (81) arranged on the base (1) and located below the backing material (2), a first cylinder (82) arranged on the support plate (81), horizontal slide rails (83) symmetrically arranged on the support plate (81) and located on both sides of the first cylinder (82), sliders (84) slidably arranged on the horizontal slide rails (83), and a clamp base (85) arranged on the top of all the sliders (84) and connected to the piston rod of the first cylinder (82), wherein the horizontal slide rails (83) are parallel to the backing material (2); The clamping assembly comprises a U-shaped clamp body (86) vertically arranged on the top of the clamp base (85) and located below the backing material (2), two clamping blocks (87) slidably arranged on the U-shaped clamp body (86) and used to clamp the backing material (2), a second cylinder (88) arranged at the bottom of the clamp base (85), and a wedge block (89) located on the inner side of the U-shaped clamp body (86) and slidingly matched with the side edges of the two clamping blocks (87) close to each other, the bottom of the wedge block (89) successively passes through the bottom plate of the U-shaped clamp body (86) and the support plate (81) and is connected to the piston rod of the second cylinder (88), the second cylinder (88) drives the wedge block (89) to rise and fall, and the wedge block (89) rises and falls and drives the two clamping blocks (87) to loosen or clamp the backing material (2).

2. The bimetallic band saw blade spherical tooth tip resistance welding device according to claim 1, characterized in that: The backing material guiding 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.

3. The bimetallic band saw blade spherical tooth tip resistance welding device according to claim 1, characterized in that: A cylindrical wheel is provided at the end of the guide rod (69) away from the swing rod (68), and the diameter of the cylindrical wheel is greater than the width of the curved guide groove (641) and the straight guide groove (651), and the cylindrical wheel is located in the gap between the vertical plate (62) and the guide groove plate (64).

4. The bimetallic band saw blade spherical tooth tip resistance welding device according to claim 1, characterized in that: A hemispherical material taking groove (71) is provided at the end of the welding head (7) away from the swing rod (68), and an air hole is provided at the bottom center of the hemispherical material taking groove (71), and a negative pressure suction pipe connected to the air hole is provided inside the welding head (7).

5. A method for resistance welding of spherical tooth tips of bimetallic band saw blades, characterized in that: The bimetallic band saw blade spherical tooth tip resistance welding device according to any one of claims 1 to 4 comprises 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 backing material 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 spherical tooth tip fit and contact 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); Then, the pick-up and delivery mechanism (6) is adjusted so that the welding head (7) contacts and corresponds to the bottom end of the material outlet of 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 material distribution mechanism (5); S3, the material distribution mechanism (5) distributes the material to the spherical tooth tips in the material storage mechanism (4); S4, the feeding clamping mechanism (8) first clamps the backing material (2), and then feeds the backing material (2) to move one tooth pitch; S5, the welding head (7) picks up, feeds and welds the spherical tooth tip: after the welding head (7) sucks the spherical tooth tip, the pick-up and feed mechanism (6) sends the welding head (7) to the welding position and welds the saw teeth (21) to be welded of the backing material (2); S6, the welding head (7) and the feeding clamping mechanism (8) are reset: after the welding of the saw teeth (21) to be welded in step S5 is completed, the picking and feeding mechanism (6) and the welding head (7) are reset, and at the same time, the feeding clamping mechanism (8) releases the backing material (2) and resets; S7, repeating steps S3 to S6, and performing resistance welding on the remaining saw teeth (21) to be welded on the backing material (2) in sequence until the welding is completed.

6. The method for resistance welding of spherical tooth tips of bimetallic band saw blades according to claim 5, characterized in that: In step S2: when the center line of the material distribution hole (531) on the push plate (53) in the material distribution mechanism (5) coincides with the center line of the through hole on the chute plate (52) that is connected to the feed pipe (54), the spherical tooth tip that enters the feed pipe (54) from the funnel (42) of the material storage mechanism (4) enters the material distribution hole (531) under the action of gravity, and this is set as the initial position of the material distribution mechanism (5); In step S3: the first motor (56) in the material distribution mechanism (5) is started to rotate one circle, and the push plate (53) pushes the spherical tooth tip in the material distribution hole (531) into the discharge pipe (55). The spherical tooth tip pushed into the discharge pipe (55) rolls into the hemispherical material collection groove (71) of the welding head (7) at the material collection position, and the push plate (53) returns to the initial position, so that the material distribution mechanism (5) can carry out the next material distribution.

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