Pre-installation device for brazing welding strips of circular saw blades
The circular saw blade brazing welding strip pre-installation device addresses high strip loss and complex structures by rotating the saw blade base to wrap and weld the strip, reducing manufacturing costs and improving consistency.
Patent Information
- Application Number
- CN202010858192.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-08-24
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2040-08-24
AI Technical Summary
Existing brazing devices for circular saw blades suffer from high welding strip loss and complex structures, leading to increased manufacturing costs.
A circular saw blade brazing welding strip pre-installation device with a frame, saw blade base clamp, rotating drive assembly, and spot welding assembly, which rotates the saw blade base to wrap the welding strip around its outer surface and forms welding spots, reducing strip loss and simplifying the brazing process.
The device simplifies the brazing equipment structure, reduces manufacturing costs by 1/4-1/3 of the time, and ensures consistent welding by minimizing strip loss, particularly for blades with dense teeth.
Smart Images
Figure CN111889840B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of machine tools and relates to a welding device, in particular to a pre-installation device for brazing welding strips of circular saw blades. Background Art
[0002] The circular saw blade includes a saw blade base and a cutter head, and the cutter head and the saw blade base are usually fixedly connected by brazing. Brazing refers to a welding method in which a brazing material with a melting point lower than the welding part and the welding part are heated to the melting temperature of the brazing material at the same time, and the gap of the solid workpiece is filled with liquid brazing material to connect the metals. The inventor has proposed a variety of automatic brazing devices, such as a diamond tool welding machine (application publication number CN103223538A), in which the welding strip is cut into welding strip segments and placed on the base. Although this can realize the automatic installation of the welding strip, there are disadvantages such as the complex structure and high manufacturing cost of the diamond tool welding machine.
[0003] Later, someone proposed a welding ribbon flux supply device for a diamond cutting tool welding machine (201510746639.9). Although this technical solution can realize automatic installation of welding ribbons and has the advantages of simple structure, it has the problem of high welding ribbon loss because the welding ribbon is melted by heating. Summary of the invention
[0004] The present invention provides a circular saw blade brazing welding strip pre-installation device, and the technical problem to be solved by the present invention is how to reduce the welding strip loss during the brazing of the circular saw blade.
[0005] The technical problem to be solved by the present invention can be achieved through the following technical solutions: a circular saw blade brazing welding strip pre-installation device, characterized in that it includes a frame and a saw blade base clamp, a rotating drive assembly connected to the saw blade base clamp is installed on the frame, the rotating drive assembly can rotate the saw blade base clamp, and a first welding strip guide and a spot welding assembly are installed on the frame; when a circular saw blade base is installed on the saw blade base clamp and the saw blade base clamp rotates to make the circular saw blade base pull the welding strip to move, the first welding strip guide can make the welding strip wrap around the outer cylindrical surface of the circular saw blade base; the spot welding assembly can form a welding spot between the welding strip resting on the outer cylindrical surface of the circular saw blade base and the circular saw blade base.
[0006] When processing a circular saw blade using a circular saw blade brazing welding band pre-installation device, first, install the circular saw blade base on the saw blade base fixture; then, apply a brazing aid on the outer circumferential surface of the circular saw blade base; then, the head of the welding band can be embedded in the water groove of the circular saw blade base to connect the head of the welding band with the circular saw blade base; the head of the welding band can also be manually placed on the outer surface of the circular saw blade base, and then the spot welding assembly is used to weld and fix the head of the welding band with the circular saw blade base; then, the rotating drive assembly drives the saw blade base fixture to rotate, the saw blade base fixture drives the circular saw blade base to rotate, and the circular saw blade base pulls the welding band to move. In this process, the spot welding assembly is controlled at intervals to form multiple welding points between the welding band and the circular saw blade base. It is best to ensure that each tooth position has a welding point, so as to avoid the welding band from falling off or shifting after being melted during subsequent brazing. Finally, cut the welding band, and the length of the welding band is guaranteed to be able to wrap around the outer circumferential surface of the circular saw blade base.
[0007] Compared with the prior art, the brazing strip pre-installation device for circular saw blades is used to pre-install the strip on the circular saw blade base, thereby simplifying the structure of the equipment required for subsequent brazing and reducing the manufacturing cost of the diamond tool welding machine. The time required for the pre-installation of the strip is usually only 1 / 4-1 / 3 of the time required for the brazing of the blade head. Therefore, one brazing strip pre-installation device for circular saw blades can be used in conjunction with three diamond tool welding machines, thereby reducing the equipment procurement cost of circular saw blade manufacturers.
[0008] The length of the brazing strip of the circular saw blade is the circumference of the circular saw blade base. Even if the strip melts and shrinks, it will not reduce the total amount of strip between the cutter head and the circular saw blade base, thereby ensuring the brazing quality. Compared with the strip flux supply device of the diamond cutting tool welding machine (201510746639.9), the required length of the single circular saw blade strip is reduced by 8%-15%. The reduction in the required length of the strip is particularly obvious on the diamond cutter head circular saw blade with dense teeth and small groove opening.
[0009] In the above-mentioned circular saw blade brazing strip pre-installation device, the frame includes a main frame and a lifting plate, and the lifting plate is connected to the main frame through a guide rod and a lifting drive assembly; the rotation drive assembly is installed on the lifting plate, and the first welding strip guide and the spot welding assembly are installed on the main frame.
[0010] In the above-mentioned circular saw blade brazing strip pre-installation device, the longitudinal line of the first guide hole is arranged parallel to the side of the circular saw blade base installed on the saw blade base clamp, and the longitudinal line of the first guide hole can intersect with the outer cylindrical surface of the above-mentioned circular saw blade base.
[0011] In the above-mentioned circular saw blade brazing welding strip pre-installation device, the spot welding assembly includes a laser head and a first cylinder and laser head installed on a main frame, a pressure head is fixed on the first cylinder, and when the piston rod of the first cylinder is extended, the welding strip can be pressed onto the outer cylindrical surface of the circular saw blade base; the light beam emitted by the laser head irradiates the area of the welding strip adjacent to the pressure head.
[0012] In the above-mentioned circular saw blade brazing strip pre-installation device, the spot welding assembly includes a first cylinder installed on the main frame, and a conductive column is fixed on the piston rod of the first cylinder. When the piston rod of the first cylinder is extended, the conductive column can press the welding strip onto the outer cylindrical surface of the circular saw blade base.
[0013] In the above-mentioned circular saw blade soldering welding strip pre-installation device, the circular saw blade soldering welding strip pre-installation device also includes an automatic welding strip feeding mechanism that can at least insert the welding strip into the first guide hole in the first welding strip guide.
[0014] In the above-mentioned circular saw blade brazing welding tape pre-installation device, the automatic welding tape feeding mechanism includes a second welding tape guide and a second cylinder installed on the second welding tape guide, and the second welding tape guide has a second guide hole; the second welding tape guide is connected to the frame through a first sliding drive component, and the first sliding drive component can move the second welding tape guide and increase or decrease the distance between the second welding tape guide and the first welding tape guide; when the second welding tape guide and the first welding tape guide are in a closed state, the second guide hole and the first guide hole are connected.
[0015] In the above-mentioned circular saw blade brazing welding strip pre-installation device, the automatic welding strip feeding mechanism also includes a clamping cylinder capable of clamping the welding strip, the clamping cylinder and the main frame of the frame are connected via a second sliding drive assembly, and the second welding strip guide is located between the clamping cylinder and the first welding strip guide; when the clamping cylinder clamps the welding strip and the second sliding drive assembly pushes the clamping cylinder to move, the clamping cylinder pushes the welding strip to move in the direction of penetrating into the second welding strip guide.
[0016] In the above-mentioned circular saw blade brazing welding strip pre-installation device, the circular saw blade brazing welding strip pre-installation device also includes scissors, which can be located in the space between the second welding strip guide and the first welding strip guide, and the scissors can cut the welding strip.
[0017] In the above-mentioned circular saw blade brazing strip pre-installation device, the scissors are connected to the frame through a third sliding drive assembly, and the third sliding drive assembly can enable the scissors to enter the space between the second strip guide and the first strip guide or leave the above space. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The invention is a three-dimensional structural schematic diagram of a circular saw blade brazing strip pre-installation device.
[0019] Figure 2 It is a schematic diagram of the three-dimensional structure at the initial stage of welding strip feeding.
[0020] Figure 3 It is a schematic diagram of the main structure of the state of the head of the extruded welding strip.
[0021] Figure 4 It is a three-dimensional structural schematic diagram of the state of cutting the welding strip.
[0022] In the figure, 1, frame; 1a, main frame; 1b, lifting plate; 1c, guide rod; 1d, lifting drive assembly; 2, saw blade base clamp; 3, rotation drive assembly; 4, first welding tape guide; 5, spot welding assembly; 5a, first cylinder; 5b, laser head; 5c, pressure head; 5c1, avoidance hole; 6, second welding tape guide; 7, second cylinder; 8, first sliding drive assembly; 9, clamping cylinder; 10, second sliding drive assembly; 11, scissors; 12, third sliding drive assembly; 13, welding tape; 14, circular saw blade base. DETAILED DESCRIPTION
[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0024] Embodiment 1: A circular saw blade brazing strip pre-installation device comprises a frame 1 , a saw blade base fixture 2 , a rotation drive assembly 3 , a first strip guide 4 and a spot welding assembly 5 .
[0025] The frame 1 includes a main frame 1a and a lifting plate 1b. The main frame 1a can be placed on the ground. The lifting plate 1b is connected to the main frame 1a through a vertically arranged guide rod 1c, so that the lifting plate 1b can be lifted and moved. The lifting plate 1b is also connected to the main frame 1a through a lifting drive assembly 1d. The lifting plate 1b can be automatically lifted and lowered by operating the lifting drive assembly 1d. The rotation drive assembly 3 is installed on the lifting plate 1b. The axis of the saw blade base clamp 2 is horizontally arranged. The rotation drive assembly 3 is connected to the saw blade base clamp 2. The rotation drive assembly can rotate the saw blade base clamp 2. The side of the circular saw blade base 14 installed on the saw blade base clamp 2 is vertically arranged; when the saw blade base clamp 2 rotates, it drives the circular saw blade base 14 to rotate synchronously. By operating the lifting plate 1b to rise and fall, the position of the circular saw blade base 14 can be raised or lowered, which facilitates the loading and unloading of the circular saw blade base 14, adjusts the height of the circular saw blade base 14, ensures the spot welding quality, and makes the circular saw blade brazing strip pre-installation device suitable for processing different types of circular saw blades, especially circular saw blades of different diameters.
[0026] The first welding tape guide 4 has a first guide hole extending therethrough, and the shape and size of the first guide hole match the welding tape 13. The first welding tape guide 4 is fixed to the main frame 1a by bolts, so that the first welding tape guide 4 can be replaced according to the model of the welding tape 13. The longitudinal line of the first guide hole is arranged parallel to the side of the circular saw blade base 14 installed on the saw blade base fixture 2, and the longitudinal line of the first guide hole is arranged to intersect with the outer cylindrical surface of the circular saw blade base 14, and usually the intersection line coincides with the top line of the outer cylindrical surface. The longitudinal line of the first guide hole is arranged to be inclined with the horizontal plane, and the inclination angle is usually less than 15°, so that the introduced welding tape 13 is easier to fit with the outer cylindrical surface of the circular saw blade base 14. By adaptively adjusting the front and rear position and the inclination angle of the first welding tape guide 4, it can be ensured that the welding tape 13 is wound around the outer cylindrical surface of the circular saw blade base 14 when the circular saw blade base 14 pulls the welding tape 13 to move.
[0027] The spot welding assembly 5 includes a first cylinder 5a and a laser head 5b mounted on the main frame 1a. A pressure head 5c is fixed on the first cylinder 5a. When the piston rod of the first cylinder 5a is extended, the welding strip 13 can be pressed on the outer circumferential surface of the circular saw blade base 14. This structure improves the fit between the welding strip 13 and the outer circumferential surface of the circular saw blade base 14, thereby improving the welding quality and welding firmness. The light beam emitted by the laser head 5b irradiates the area of the welding strip 13 adjacent to the pressure head 5c. The heat generated by the laser beam causes the welding strip 13 and the circular saw blade base 14 to partially melt and be fixed together, thereby forming a welding spot between the welding strip 13 on the outer circumferential surface of the circular saw blade base 14 and the circular saw blade base 14. The middle of the pressure head 5c has an avoidance hole 5c1, and the light beam emitted by the laser head 5b is irradiated into the avoidance hole 5c1. This structure allows both ends of the spot welding area in the welding strip 13 to be pressed by the pressure head 5c, further improving the fit between the welding strip 13 and the outer circumferential surface of the circular saw blade base 14. The pressure head 5c is located directly above the saw blade base fixture 2, the laser head 5b is located directly above the pressure head 5c, and the first welding strip guide 4 is located on one side of the pressure head 5c. This arrangement structure is convenient for surrounding the welding strip 13, and the welding strip 13 naturally moves with the top line area of the outer circumferential surface of the circular saw blade base 14, thereby improving the welding quality.
[0028] The circular saw blade brazing welding strip pre-installation device also includes an automatic welding strip feeding mechanism that can at least insert the welding strip 13 into the first guide hole of the first welding strip guide 4, so that the welding strip 13 can be cut at the rear end area of the first welding strip guide 4, so that the tail end of the welding strip 13 is still guided by the first welding strip guide 4, thereby improving the surrounding position consistency of the welding strip 13 and the welding firmness.
[0029] The automatic welding tape feeding mechanism includes a second welding tape guide 6 and a second cylinder 7 installed on the second welding tape guide 6. The second welding tape guide 6 has a second guide hole. The second welding tape guide 6 is located on the extension line of the first guide hole in the first welding tape guide 4. The second welding tape guide 6 is connected to the main frame 1a of the frame 1 through a first sliding drive assembly 8. The movement of the second welding tape guide 6 can increase or decrease the distance between the second welding tape guide 6 and the first welding tape guide 4. When the piston rod of the second cylinder 7 is extended, the welding tape 13 can be pressed on the second welding tape guide 6. When the second welding tape guide 6 and the first welding tape guide 4 are in a closed state, the second guide hole and the first guide hole are connected. When the second welding tape guide 6 and the first welding tape guide 4 are in a separated state, the scissors 11 can extend into the space between the second welding tape guide 6 and the first welding tape guide 4 to cut the welding tape 13. When the piston rod of the second cylinder 7 is in an extended state and the second welding tape guide 6 and the first welding tape guide 4 are switched from a separated state to a closed state, the end of the welding tape 13 penetrates into the first guide hole of the first welding tape guide 4.
[0030] The automatic welding strip feeding mechanism also includes a clamping cylinder 9 capable of clamping the welding strip 13. The clamping cylinder 9 is connected to the main frame 1a of the frame 1 through a second sliding drive assembly 10, and the second welding strip guide 6 is located between the clamping cylinder 9 and the first welding strip guide 4. When the second sliding drive assembly 10 pushes the clamping cylinder 9 to move and the clamping cylinder 9 clamps the welding strip 13, the welding strip 13 is pushed forward; the clamping cylinder 9 releases the welding strip 13, the clamping cylinder 9 resets, and the clamping cylinder 9 clamps the welding strip 13 and moves forward, thereby realizing intermittently pushing the welding strip 13 forward.
[0031] The circular saw blade brazing welding strip pre-installation device also includes scissors 11, which are pneumatic scissors 11 or electric scissors 11. The scissors 11 are connected to the main frame 1a of the frame 1 through a third sliding drive component 12. The third sliding drive component 12 can enable the scissors 11 to enter the space between the second welding strip guide 6 and the first welding strip guide 4 or to leave the above space; that is, when the welding strip 13 needs to be cut, the third sliding drive component 12 drives the scissors 11 to move horizontally, so that the scissors 11 enter the space between the second welding strip guide 6 and the first welding strip guide 4; in other states, the scissors 11 are in a state of leaving the space between the second welding strip guide 6 and the first welding strip guide 4, so as to avoid the scissors 11 affecting other actions.
[0032] By describing the process of wrapping a circle of welding tape 13 around a circular saw blade base 14, the functions and advantages of each component are further explained. The first step is to install the circular saw blade base 14 and set the initial position of the head of the welding tape 13. To install the circular saw blade base 14, first install the circular saw blade base 14 on the saw blade base fixture 2, and then adjust the height of the lifting plate 1b so that the pressure head 5c can be pressed on the outer cylindrical surface of the circular saw blade base 14, and the input welding tape 13 can be placed on the top line area of the outer cylindrical surface of the circular saw blade base 14; finally, operate the rotary drive assembly 3 to rotate the circular saw blade base 14, adjust the tooth position in the circular saw blade base 14, and ensure that the center line of one of the tooth positions basically coincides with the top line of the outer cylindrical surface of the circular saw blade base 14. To set the initial position of the head of the welding tape 13, first install the rolled welding tape 13 on the main frame 1a of the frame 1, and pass the welding tape 13 through the clamping port of the clamping cylinder 9 and the second guide hole of the second welding tape guide 6. Then operate the first sliding drive assembly 8 to separate the second welding tape guide 6 from the first welding tape guide 4. Then operate the piston rod of the second cylinder 7 to extend it. Finally, use the third sliding drive assembly 12 and the scissors 11 to cut the welding tape 13 and remove the cut welding rod.
[0033] like Figure 2 As shown, in the second step, the guides are docked. First, the first sliding drive assembly 8 is operated to close the second welding strip guide 6 and the first welding strip guide 4, so that the head of the welding strip 13 passes through the first guide hole of the first welding strip guide 4. Then the piston rod of the second cylinder 7 is operated to retract. The second cylinder 7 is used to press the welding strip 13 to ensure that the welding strip 13 can move synchronously with the second welding strip guide 6.
[0034] like Figure 2 and Figure 3 As shown, in the third step, the welding strip 13 is automatically fed, and the second sliding drive assembly 10 and the clamping cylinder 9 are controlled to intermittently push the welding strip 13 forward until the welding strip 13 covers the tooth position at the top.
[0035] like Figure 3 As shown, in the fourth step of welding, the first welding point is formed. The piston rod of the first cylinder 5a is controlled to extend, and the pressure head 5c presses the welding strip 13 onto the outer cylindrical surface of the circular saw blade base 14; and the laser generator is controlled to irradiate the welding strip 13 with the generated laser, and the head of the welding strip 13 is fixedly connected to the circular saw blade base 14.
[0036] The fifth step is rotational shifting, operating the clamping cylinder 9 to ensure that the clamping cylinder 9 is in a state of releasing the welding strip 13, and operating the rotary drive assembly 3 to rotate the circular saw blade base 14 by an angle corresponding to a tooth position, so that the center line of the second tooth position is substantially coincident with the top line of the outer circumferential surface of the circular saw blade base 14. In this process, the circular saw blade base 14 pulls the welding strip 13 to move and the welding strip 13 is attached to the outer circumferential surface of the circular saw blade base 14.
[0037] The sixth step is to continue welding. The piston rod of the first cylinder 5a is controlled to extend, and the pressure head 5c presses the welding strip 13 onto the outer cylindrical surface of the circular saw blade base 14; and the laser generator is controlled to irradiate the generated laser on the welding strip 13, and the head of the welding strip 13 is fixedly connected to the circular saw blade base 14.
[0038] Repeat the fifth and sixth steps until the spot welding of the welding strip 13 and the third to last tooth position of the circular saw blade base 14 is completed.
[0039] The seventh step is to cut the welding tape 13, operate the first sliding drive assembly 8 to separate the second welding tape guide 6 from the first welding tape guide 4, then operate the piston rod of the second cylinder 7 to extend, and finally use the third sliding drive assembly 12 and the scissors 11 to cut the welding tape 13 and remove the cut welding rod.
[0040] Step 8: Repeat steps 5 and 6 until welding spots are formed between the welding strip 13 and all teeth of the circular saw blade base 14.
[0041] Embodiment 2: The structure and principle of this embodiment are basically the same as those of Embodiment 1. The basic similarities are not described in detail, and only the differences are described. The differences are: the spot welding assembly 5 includes a first cylinder 5a installed on the main frame 1a, and a conductive column is fixed on the piston rod of the first cylinder 5a. When the piston rod of the first cylinder 5a is extended, the conductive column can press the welding strip 13 onto the outer cylindrical surface of the circular saw blade base 14. When the conductive column and the circular saw blade base 14 are both energized, a welding spot is formed between the conductive column abutment area in the welding strip 13 and the circular saw blade base 14.
Claims
1. A circular saw blade brazing strip pre-installation device, characterized in that: The invention comprises a frame (1) and a saw blade base fixture (2); a rotation drive assembly (3) connected to the saw blade base fixture (2) is mounted on the frame (1); the rotation drive assembly (3) can rotate the saw blade base fixture (2); a first welding strip guide (4) and a spot welding assembly (5) are mounted on the frame (1); the first welding strip guide (4) and the spot welding assembly (5) are located above the saw blade base fixture (2); the first welding strip guide (4) has a first guide hole extending therethrough; and the first welding strip guide (4) has a first guide hole extending therethrough. A longitudinal line of a guide hole is arranged obliquely with respect to a horizontal plane; when a circular saw blade base (14) is mounted on the saw blade base fixture (2) and the saw blade base fixture (2) rotates so that the circular saw blade base (14) pulls the welding strip (13) to move, the first welding strip guide (4) can make the welding strip (13) wrap around the outer circumferential surface of the circular saw blade base (14); and the spot welding assembly (5) can form a welding spot between the welding strip (13) resting on the outer circumferential surface of the circular saw blade base (14) and the circular saw blade base (14); The circular saw blade brazing welding strip pre-installation device also includes an automatic welding strip feeding mechanism capable of inserting the welding strip (13) into a first guide hole in the first welding strip guide (4); the automatic welding strip feeding mechanism includes a second welding strip guide (6) and a pair of scissors (11); The second welding strip guide (6) is located on the extension line of the first guide hole in the first welding strip guide (4), the second welding strip guide (6) has a second guide hole, and a second cylinder (7) is installed on the second welding strip guide (6) and can press the welding strip (13) onto the second welding strip guide (6); the second welding strip guide (6) is connected to the frame (1) through a first sliding drive component (8) that can move the second welding strip guide (6), and the first sliding drive component (8) can be controlled to make the second welding strip guide (6) and the first welding strip guide (4) in a closed state or a separated state; The scissors (11) and the frame (1) are connected via a third sliding drive assembly (12); when the second welding strip guide (6) and the first welding strip guide (4) are in a separated state, the third sliding drive assembly (12) enables the scissors (11) to enter the space between the second welding strip guide (6) and the first welding strip guide (4), and the welding strip (13) can be cut by the scissors (11) at the rear end area of the first welding strip guide (4); when the second cylinder (7) presses the welding strip (13) onto the second welding strip guide (6), and the first sliding drive assembly (8) is controlled to switch the second welding strip guide (6) and the first welding strip guide (4) from a separated state to a closed state, the head of the welding strip (13) penetrates into the first guide hole of the first welding strip guide (4).
2. The circular saw blade brazing strip pre-installation device according to claim 1, characterized in that: The side surface of the circular saw blade base (14) mounted on the saw blade base fixture (2) is vertically arranged, the longitudinal line of the first guide hole is arranged parallel to the side surface of the circular saw blade base (14) mounted on the saw blade base fixture (2), the longitudinal line of the first guide hole can intersect with the outer cylindrical surface of the circular saw blade base (14), and the welding strip (13) passing through the first guide hole can rest on the top line area of the outer cylindrical surface of the circular saw blade base (14).
3. The circular saw blade brazing strip pre-installation device according to claim 2, characterized in that: The spot welding assembly (5) comprises a laser head (5b) and a first cylinder (5a) mounted on a main frame (1a); a pressure head (5c) is fixed on the first cylinder (5a); when the piston rod of the first cylinder (5a) is extended, the welding strip (13) can be pressed onto the outer circumferential surface of the circular saw blade base (14); the light beam emitted by the laser head (5b) is irradiated onto an area of the welding strip (13) adjacent to the pressure head (5c).
4. The circular saw blade brazing strip pre-installation device according to claim 2, characterized in that: The spot welding assembly (5) comprises a first cylinder (5a) mounted on a main frame (1a), a conductive column being fixed on a piston rod of the first cylinder (5a), and the conductive column being able to press the welding strip (13) onto the outer circumferential surface of a circular saw blade base (14) when the piston rod of the first cylinder (5a) is extended.
5. The circular saw blade brazing strip pre-installation device according to claim 1, characterized in that: The automatic welding tape feeding mechanism further comprises a clamping cylinder (9) capable of clamping the welding tape (13); the clamping cylinder (9) is connected to the main frame (1a) of the frame (1) via a second sliding drive assembly (10); the second welding tape guide (6) is located between the clamping cylinder (9) and the first welding tape guide (4); when the clamping cylinder (9) clamps the welding tape (13) and the second sliding drive assembly (10) pushes the clamping cylinder (9) to move, the clamping cylinder (9) pushes the welding tape (13) to move in a direction of penetrating into the second welding tape guide (6).
6. The circular saw blade brazing strip pre-installation device according to claim 1, 2, 3 or 4, characterized in that: The frame (1) comprises a main frame body (1a) and a lifting plate (1b); the lifting plate (1b) and the main frame body (1a) are connected via a guide rod (1c) and a lifting drive assembly (1d); a rotation drive assembly (3) is mounted on the lifting plate (1b), and a first welding strip guide (4) and a spot welding assembly (5) are mounted on the main frame body (1a).