Laser brazing mechanism for saw blade head

Abstract

The invention provides a saw blade bit laser brazing mechanism, which is suitable for laser brazing a bit on a tooth of a saw blade, comprising a bearing device for bearing the saw blade, a laser generator for generating laser, a reflector for reflecting the laser generated by the laser generator, and a pressing device for pressing the bit from the side opposite to the tooth where the bit is located, so that the brazing agent between the bit and the tooth is kept in a tight pressing state. The reflector is located beside the saw blade borne by the bearing device, and the laser generator is arranged opposite to the reflector. The laser generated by the laser generator is irradiated on the bit pressed by the pressing device in a radiative heating manner under the reflection of the reflector, so that the bit conducts heat to the brazing agent while being heated, thereby melting the brazing agent to fix the bit and the tooth together. The problem of pulling force is solved, the deformation and even cracking are effectively prevented, and the mechanism has the advantage of simple structure.

Description

Technical Field

[0001] This invention relates to the field of saw blade processing, and more particularly to a laser brazing mechanism for saw blade tips. Background Technology

[0002] As is well known, saw blades are widely used in various cutting processes, such as woodworking. To improve the service life of saw blades, a common practice is to use high-frequency welding to weld the cutting head, made of a superhard material (such as, but not limited to, diamond or alloys), into the pre-machined teeth on the saw blade. Because the cutting head is made of a superhard material, while the saw blade is made of a material with better flexibility and lower hardness than the cutting head, this combination effectively increases the service life of the saw blade.

[0003] During high-frequency welding, the heat applied to the teeth and the saw blade melts the joint between the teeth and the saw blade, thus fixing them together. However, because the saw blade and the saw blade are made of different materials, their coefficients of thermal expansion are different. Since the coefficient of thermal expansion generally decreases with increasing hardness, the high-frequency welded teeth and the saw blade experience tensile forces at their joint during the return to room temperature due to the difference in their coefficients of thermal expansion. This tensile force causes deformation at the joint, and may even lead to cracking.

[0004] Therefore, there is an urgent need for a laser brazing mechanism for saw blade heads that can effectively prevent deformation or even cracking by addressing tensile forces and has the advantage of simple structure. Summary of the Invention

[0005] The purpose of this invention is to provide a laser brazing mechanism for saw blade heads that effectively prevents deformation or even cracking by solving tensile forces and has the advantage of simple structure.

[0006] To achieve the above objectives, the saw blade laser brazing mechanism of the present invention is applicable to laser brazing the saw blade tip onto the teeth of a saw blade. It includes a support device for supporting the saw blade, a laser generator for generating laser light, a reflector for reflecting the laser light generated by the laser generator, and a pressing device for pressing the saw blade tip against the tooth from the side opposite to the blade tip, so that the brazing flux disposed between the saw blade tip and the tooth is held tightly together. The reflector is located beside the saw blade supported by the support device. The laser generator is arranged opposite to the reflector. The laser light generated by the laser generator, reflected by the reflector, irradiates the saw blade tip pressed by the pressing device in a radiant heating manner, causing the saw blade tip to heat up while simultaneously conducting heat to the brazing flux, thereby melting the brazing flux and fixing the saw blade tip to the tooth.

[0007] Preferably, the reflector is located beside the saw blade along the thickness direction of the saw blade, and the pressing device is arranged opposite or adjacent to the reflector.

[0008] Preferably, the reflector and the laser generator are arranged opposite each other with the saw blade as the center.

[0009] Preferably, the laser generator is located below or above the corresponding reflector.

[0010] Preferably, the reflector is arranged to swing back and forth, and the laser generated by the laser generator moves back and forth on the cutting head under the swinging of the reflector.

[0011] Preferably, the laser brazing mechanism for the saw blade head of the present invention further includes a limiting seat for limiting the reciprocating swing angle of the reflector. The reflector is mounted on the limiting seat in a reciprocating swing manner around a swing center line. One of the limiting seat and the reflector is provided with a limiting structure, and the other of the limiting seat and the reflector is provided with a matching limiting structure. The matching limiting structure resists the limiting structure and limits the reflector when it swings around the swing center line to a preset angle.

[0012] Preferably, the limiting structure is an arc-shaped long groove or arc-shaped long hole formed in the limiting seat body with the arc center located on the swing center line, and the matching limiting structure is a protrusion structure extending into the arc-shaped long groove or arc-shaped long hole.

[0013] Preferably, the limiting structure consists of two limiting protrusions spaced apart and aligned along the swing direction of the reflector, and the matching limiting structure is located between the two limiting protrusions along the swing direction of the reflector and is aligned with each of the limiting protrusions.

[0014] Preferably, the swing center line is perpendicular to the limiting seat.

[0015] Preferably, the laser generator is a semiconductor laser generator.

[0016] Compared to existing technologies, this invention utilizes a pressing device that presses against one side of the saw blade from the back of the blade to keep the brazing flux between the blade and the tooth tightly compressed. A reflector, located beside the saw blade supported by the carrier and opposite to the laser generator, ensures that the laser generated by the laser generator, reflected by the reflector, radiates heat onto the blade pressed by the pressing device. This causes the blade to heat up while simultaneously transferring heat to the brazing flux, melting it. Combined with the pressing device's pressure on the blade from the back of the blade... The pressure from one side of the tooth where the blade head is located causes the molten brazing flux to more tightly fix the blade head and the tooth together, thus effectively solving the defects of deformation or even cracking at the joint between the blade head and the tooth caused by simultaneous heating of the blade head and the tooth and the difference in their expansion coefficients. At the same time, the laser brazing mechanism of the saw blade head of the present invention can solve the defects of tensile force by combining the pressure device, the reflector, the laser generator and the bearing device, thus making the structure of the laser brazing mechanism of the saw blade head of the present invention simple. Attached Figure Description

[0017] Figure 1 This is a perspective view of the laser brazing mechanism for the saw blade head of the present invention.

[0018] Figure 2 yes Figure 1 The diagram shows a plan view of the laser brazing mechanism for the saw blade head, viewed in the direction indicated by arrow B.

[0019] Figure 3 yes Figure 1 The plan view of the reflector, limit seat, and rotary motor on the right side of the center, viewed in the direction indicated by arrow A.

[0020] Figure 4 yes Figure 3 A floor plan viewed from right to left.

[0021] Figure 5 yes Figure 4 A plan view showing the rotating motor hidden behind the camera.

[0022] Figure 6 It is a 3D diagram of a saw blade with a blade head brazed into each tooth.

[0023] Figure 7 yes Figure 6 The diagram shows a plan view of the saw blade viewed from left to right. Detailed Implementation

[0024] To illustrate the technical content and structural features of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Please see Figure 1 and Figure 2 The saw blade laser brazing mechanism 100 of the present invention is used to laser braze the saw blade 210 onto the teeth 221 of the saw blade 220, so as to achieve the purpose of laser brazing between the saw blade 210 and the teeth 221.

[0026] Combination Figure 6 and Figure 7 The saw blade laser brazing mechanism 100 of the present invention includes a supporting device 10 for supporting the saw blade 220, a laser generator 20 for generating laser 21, a reflecting mirror 30 for reflecting the laser 21 generated by the laser generator 20, and a pressing device 40 for pressing against one side 211 of the tooth 221 where the saw blade 210 is located from behind the saw blade 210 so that the brazing flux 230 disposed between the saw blade 210 and the tooth 221 is kept tightly pressed between the saw blade 210 and the tooth 221. The reflecting mirror 30 is located beside the saw blade 220 along the thickness direction of the saw blade 220 supported by the supporting device 10 (see the direction indicated by arrow A and the opposite direction), for example, in Figure 1 and Figure 2 In this configuration, when the reflectors 30 are arranged opposite each other with the saw blade 220 as the center, it can also be referred to as a double-sided arrangement with the saw blade 220 as the center. In this case, the left reflector 30 is located next to the left side of the saw blade 220, and the right reflector 30 is located next to the right side of the saw blade 220. When the reflectors 30 are arranged unilaterally with the saw blade 220 as the center, the reflectors 30 can be located next to the left, right, or front side of the saw blade 220, etc., so it is not considered as a single-sided arrangement. Figure 1 and Figure 2 The above is the limit.

[0027] See also Figure 1 and Figure 2 The pressing device 40 and the reflector 30 are arranged adjacent to each other, for example, in Figure 1 and Figure 2 In this design, the pressure device 40 is located in front of the saw blade 220, while the reflectors 30 are located to the left and right of the saw blade 220, respectively. This design staggers the positions of the reflectors 30 and the pressure device 40, ensuring that the pressure point of the pressure device 40 on the side 211 of the cutter head 210 opposite to the teeth 221 is not on the same side of the cutter head 210 as the position where the laser 21 reflected by the reflectors 30 illuminates the cutter head 210. For example, in... Figure 1 and Figure 2In the process, the pressure device 40 presses down on one side 211 of the cutting head 210, which is the lower side. The laser 21 reflected by the reflector 30 illuminates the cutting head 210 at the left and right end faces 212. Therefore, to avoid interference between the position of the laser 21 illuminating the cutting head 210 and the position of the pressure device 40 pressing down on one side 211 of the cutting head 210, the reliability of each operation is ensured. Of course, the position of the laser 21 illuminating the cutting head 210 can be other than that of the other side 211. Figure 1 and Figure 2 The above is the limit.

[0028] See also Figure 1 and Figure 2 The laser generator 20 and the reflector 30 are arranged opposite each other, for example, in Figure 1 and Figure 2 In this arrangement, the laser generator 20 is located below the reflector 30. Preferably, the laser generator 20 is vertically arranged so that the laser 21 generated by the laser generator 20 shines vertically upward onto the reflector 30. This arrangement reduces the amount of horizontal space occupied by the laser generator 20, thus simplifying the structure of the saw blade head brazing mechanism 100 of the present invention and facilitating the assembly operation of the laser generator 20. Of course, depending on actual needs, the laser generator 20 can also be located above the reflector 30, so it is not necessary to... Figure 1 and Figure 2 The laser 21 generated by the laser generator 20, reflected by the reflector 30, irradiates the cutting head 210 pressed by the pressing device 40 through radiation heating. Preferably, the laser 21 generated by the laser generator 20, reflected by the reflector 30, irradiates the cutting head 210 pressed by the pressing device 40 in a horizontal direction, causing the cutting head 210 to heat up while simultaneously transferring heat to the brazing flux 230. This causes the brazing flux 230 to melt, fixing the cutting head 210 to the tooth 221 where the cutting head 210 is located. (See attached diagram). Figure 7The enlarged view on the right is shown in the image. It should be noted that when the reflector 30 is arranged opposite to or on both sides of the saw blade 220 supported by the carrier device 10, the laser generator 20 is also arranged opposite to the saw blade 220. This ensures that the laser generator 20 on the same side is opposite to the reflector 30, thus ensuring that the laser 21 generated by the laser generator 20 on the same side is reflected by the reflector 30 and irradiates the end face 212 of the blade head 210 pressed by the pressing device 40. Specifically, the laser 21 generated by the laser generator 20 on the left side irradiates the left end face 212 of the blade head 210 pressed by the pressing device 40 under the reflection of the left reflector 30, and the laser 21 generated by the laser generator 20 on the right side irradiates the right end face 212 of the blade head 210 pressed by the pressing device 40 under the reflection of the right reflector 30. This effectively shortens the blade head... The 210 section conducts heat to the flux 230, effectively improving the uniformity of heating the flux 230. It also provides sufficient space for the stepping motion of the saw blade 220, the pressing motion of the pressing device 40, and the combination of the cutter head 210 with the teeth 221 before brazing, preventing interference between them. Furthermore, when the reflector 30 and the laser generator 20 are each arranged on one side, the pressing device 40 can also be arranged opposite to the reflector 30. For example, the pressing device 40 can be located next to the right side of the saw blade 220 while the reflector 30 is located next to the left side of the saw blade 220, or vice versa, achieving the same purpose of offsetting the reflector 30 and the pressing device 40. When the reflector 30 and the pressing device 40 do not need to be offset, they can be located on the same side of the saw blade 220. More specifically, as follows:

[0029] like Figures 1 to 5As shown, the reflector 30 is arranged to reciprocate, so that the laser 21 generated by the laser generator 20 moves back and forth on the cutting head 210 under the reciprocating oscillation of the reflector 30. Preferably, the laser 21 moves back and forth on the cutting head 210 at a uniform speed under the reciprocating oscillation of the reflector 30, so as to effectively ensure that the cutting head 210 is heated evenly, thereby ensuring the uniform melting of the brazing flux 230, thus improving the firmness of the connection between the cutting head 210 and the tooth 221. In addition, controlling the reciprocating movement of the laser 21 generated by the laser generator 20 on the cutting head 210 by the reciprocating oscillation of the reflector 30 is easier to operate than controlling the oscillation of the laser generator 20 to achieve the reciprocating movement of the laser 21 on the cutting head 210. Moreover, the space occupied and the power required by the oscillation of the laser generator 20 are much greater than those required by the reflector 30. Specifically, to achieve reliable reciprocating oscillation of the reflector 30, the saw blade laser brazing mechanism 100 of the present invention further includes a limiting seat 50 for limiting the reciprocating oscillation angle of the reflector 30. The reflector 30 is mounted on the limiting seat 50 to reciprocate around an oscillation center line C. Preferably, the oscillation center line C around which the reflector 30 reciprocates is perpendicular to the limiting seat 50, as shown in the figure. Figure 3 As shown, this design allows the limiting seat 50 to provide sufficient space for the swing of the reflector 30 without the need for clearance space. The limiting seat 50 is equipped with a limiting structure 51, and the reflector 30 is equipped with a matching limiting structure 31. The matching limiting structure 31 blocks and limits the reflector 30 when it swings around the swing center line C to a preset angle. For example, in Figure 5 In this configuration, when the reflector 30 swings clockwise around the swing center line C to the position indicated by the dotted circle in the upper right corner, the limiting structure 31 abuts against the limiting structure 51, thus limiting the reciprocating swing angle of the reflector 30 through the cooperation of the limiting structure 31 and the limiting structure 51. For example, in... Figure 5 In the diagram, the angle between the dashed circle pointing to the upper right and the dashed circle pointing to the lower right is 45 degrees, but this is not a limitation. For detailed information on the limiting structure 31 and the limiting structure 51, please see the description below.

[0030] like Figure 1 , Figure 4 and Figure 5As shown, the limiting structure 51 is an arc-shaped elongated hole opened in the limiting seat 50 with its arc center located on the swing center line C, or it can be an arc-shaped elongated groove, which is equally convenient for the manufacturing and processing of the limiting structure 51 on the limiting seat 50; correspondingly, the matching limiting structure 31 is a protruding structure extending into the arc-shaped elongated groove or arc-shaped elongated hole, such as a protruding column structure, to facilitate the setting of the matching limiting structure 31 on the reflector 30 and to ensure the smooth sliding of the matching limiting structure 31 in the arc-shaped elongated hole or arc-shaped elongated groove; of course, according to actual needs, the limiting structure 51 can also be designed as two limiting protrusions that are spaced apart and aligned along the swing direction of the reflector 30, and the matching limiting structure 31 is located between the two limiting protrusions along the swing direction of the reflector 30 and is aligned with each limiting protrusion, which can also limit the angle of reciprocating swing of the reflector 30. It should be noted that the positions of the limiting structure 51 and the matching limiting structure 31 can be interchanged according to actual needs. That is, the limiting structure 51 can be provided on the reflector 30, and correspondingly, the matching limiting structure 31 can be provided on the limiting seat 50, which can also achieve the purpose of limiting the reciprocating swing angle of the reflector 30. In order to automatically control the reciprocating swing of the reflector 30, in... Figures 1 to 4 In the design, a rotary motor 60 is mounted on the limiting seat 50. The rotary motor 60 and the reflector 30 are arranged on opposite sides of the limiting seat 50. For example, the rotary motor 60 is located on the front side of the limiting seat 50 and the reflector 30 is located on the rear side of the limiting seat 50. The reflector 30 is directly mounted on the output shaft of the rotary motor 60. This design avoids the need to increase the gap space between the rotary motor 60 and the reflector 30 due to the fact that the gap space needs to be increased. In addition, the distance between the reflector 30 and the limiting seat 50 needs to be increased due to the addition of the intermediate transmission component. Furthermore, the arrangement of the rotary motor 60 and the reflector 30 on the same side is not conducive to the counterweight of the limiting seat 50. It should be noted that when the rotary motor 60 and the reflector 30 are arranged on opposite sides of the limiting seat 50, the output shaft of the rotary motor 60 can indirectly drive the reflector 30 to reciprocate. For example, the reflector 30 is mounted on the limiting seat 50 via a mounting shaft. In this case, the rotary motor 60 can drive the mounting shaft to swing via belt drive, chain drive, or gear drive. The aforementioned swing center line C is the axis of the mounting shaft.

[0031] like Figure 1 and Figure 2As shown, the pressing device 40 is a pressing block structure. In this case, the pressing device 40 needs to be assembled in an external transfer device. The transfer device only needs to enable the pressing device 40 to move to the position corresponding to the cutting head 210 to be pressed and to press the side 211 of the cutting head 210 opposite to the teeth 221. Furthermore, the laser generator 20 is a semiconductor laser generator to ensure that the generated laser 21 radiates and heats the cutting head 210. In addition, when the saw blade 220 is a circular saw blade, the supporting device 10 is a shaft-like structure, allowing the circular saw blade to be fitted onto the shaft-like structure; when the saw blade 220 is a strip saw blade, the supporting device 10 is a clamping structure that supports and clamps the strip saw blade. It should be noted that, regardless of whether it is a circular saw blade or a strip saw blade, when they both require step-by-step tooth shifting, a tooth shifting device is required for the saw blade 220 supported by the bearing device 10. For the clamping structure, the tooth shifting device is, for example, but not limited to, a linear motor that drives the clamping structure to perform step-by-step linear sliding. For the shaft structure, the tooth shifting device is, for example, but not limited to, a rotary motor that drives the shaft structure to perform step-by-step rotation.

[0032] Compared with the prior art, by using a pressing device 40 that presses against one side 211 of the saw blade 221 opposite to the tooth 221 where the saw blade 210 is located, the flux 230 between the saw blade 210 and the tooth 221 is kept tightly pressed by the saw blade 210 and the tooth 221, and a reflector 30 located beside the saw blade 220 carried by the support device 10 and arranged opposite to the laser generator 20, the laser 21 generated by the laser generator 20 is reflected by the reflector 30 and irradiates the saw blade 210 pressed by the pressing device 40 in a radiant heating manner. This causes the saw blade 210 to heat up and conduct heat to the flux 230, thereby melting the flux 230. Combined with the pressing device 40 pressing against the saw blade 210, the laser 21 generated by the laser generator 20 is radiantly heated by the reflection of the reflector 30. The back of the blade 210 is pressed against the side 211 of the tooth 221 where the blade 210 is located, thus making the molten brazing flux 230 more tightly fix the blade 210 and the tooth 221 where the blade 210 is located together. This effectively solves the defect of deformation or even cracking at the joint between the blade 210 and the tooth 221 caused by heating the blade 210 and the tooth 221 at the same time and the different expansion coefficients of the blade 210 and the tooth 221. At the same time, the saw blade laser brazing mechanism 100 of the present invention can solve the defect of tensile force by combining the pressing device 40, the reflector 30, the laser generator 20 and the bearing device 10, thus making the structure of the saw blade laser brazing mechanism 100 of the present invention simple.

[0033] It is worth noting that when the saw blade 220 is a circular saw blade, the thickness direction of the saw blade 220 is its axial direction, which is also... Figure 1 and Figure 2The direction indicated by arrow A and its opposite direction indicate that when the saw blade 220 is a strip-shaped saw blade, the thickness direction of the saw blade 220 is perpendicular to its length direction. Additionally, the brazing flux 230 is located on the side 213 of the cutter head 210 facing the teeth 221. Furthermore, when the cutter head 210, pressed by the pressing device 40, completes laser brazing, the pressing device 40 needs to move away from the saw blade 220 to avoid obstructing the stepping teeth of the saw blade 220, thus ensuring smooth tooth setting. After the saw blade 220 has finished setting the teeth, the pressing device 40 then moves towards the saw blade 220 to the position corresponding to the cutter head 210 to be welded, for example... Figure 1 Below the cutter head 210 shown, the cutter head 210 is pressed against the side 211 opposite to the teeth 221 to ensure that the cutter head 210 to be welded is pressed against the teeth 221; also, when the saw blade 220 is performing step-by-step tooth shifting, it is preferable to pause the laser 21 generated by the laser generator 20.

[0034] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are within the scope of the present invention.

Claims

1. A laser brazing mechanism for saw blade tips, suitable for laser brazing saw blade tips onto the teeth of a saw blade, characterized in that, The laser brazing mechanism for the saw blade includes a support device for supporting the saw blade, a laser generator for generating laser light, a reflector for reflecting the laser light generated by the laser generator, and a pressing device for pressing the saw blade from the back of the blade against the tooth so that the brazing flux between the saw blade and the tooth is kept tightly pressed together. The reflector is located beside the saw blade supported by the support device. The laser generator is arranged opposite to the reflector. The laser light generated by the laser generator irradiates the saw blade pressed by the pressing device under the reflection of the reflector in a radiative heating manner. This causes the saw blade to heat up and conduct heat to the brazing flux, thereby melting the brazing flux and fixing the saw blade and the tooth together. The reflector is arranged to swing back and forth, and the laser generated by the laser generator moves back and forth on the cutter head under the swinging of the reflector, so that the cutter head is heated evenly.

2. The laser brazing mechanism for saw blade heads according to claim 1, characterized in that, The reflector is located on the side of the saw blade along the thickness direction of the saw blade, and the pressing device is arranged opposite or adjacent to the reflector.

3. The laser brazing mechanism for saw blade heads according to claim 2, characterized in that, The reflector and the laser generator are arranged opposite each other with the saw blade as the center.

4. The laser brazing mechanism for saw blade heads according to any one of claims 1 to 3, characterized in that, The laser generator is located below or above the corresponding reflector.

5. The laser brazing mechanism for saw blade heads according to claim 1, characterized in that, It also includes a limiting seat for limiting the reciprocating swing angle of the reflector. The reflector is mounted on the limiting seat in a reciprocating swing around a swing center line. One of the limiting seat and the reflector is provided with a limiting structure, and the other of the limiting seat and the reflector is provided with a matching limiting structure. The matching limiting structure resists and limits the reflector when it swings around the swing center line to a preset angle.

6. The laser brazing mechanism for saw blade heads according to claim 5, characterized in that, The limiting structure is an arc-shaped long groove or arc-shaped long hole opened on the limiting seat body with the arc center located on the swing center line, and the matching limiting structure is a protrusion structure extending into the arc-shaped long groove or arc-shaped long hole.

7. The laser brazing mechanism for saw blade heads according to claim 5, characterized in that, The limiting structure consists of two limiting protrusions spaced apart and aligned along the swing direction of the reflector. The matching limiting structure is located between the two limiting protrusions along the swing direction of the reflector and is aligned with each of the limiting protrusions.

8. The laser brazing mechanism for saw blade heads according to claim 5, characterized in that, The swing center line is perpendicular to the limiting seat.

9. The laser brazing mechanism for saw blade heads according to claim 1, characterized in that, The laser generator is a semiconductor laser generator.

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