Method for carrying out hardening treatment on knife edge by adopting steel bar and knife edge jig

Abstract

The invention discloses a method for conducting hardening treatment on a knife edge through a steel bar and a knife edge jig. The knife edge jig comprises a base, and a steel bar positioning station and a steel bar welding station are sequentially arranged on the top face of the base from top to bottom; the steel bar positioning station is used for carrying out laser welding multi-point positioning on the steel bar and a tool edge of the tool to be machined, and the tool with the laser tool edge positioned is obtained; the steel bar welding station is used for carrying out laser welding on the contact surfaces of the knife edge of the knife subjected to laser knife edge positioning and the steel bar to obtain a machined knife; when the tool edge jig is used for machining a tool, the tool is machined in a horizontal mode, and Z-axis height transformation does not need to be considered in path programming of the tool edge jig; in addition, the hardening machining of a single cutter can be completed only through one-time machining in the laser welding machining mode, the machining technology is simple, and the efficiency is high; and in the laser machining process, only working parameters such as laser power, moving speed and protection gas amount need to be controlled, the number of the working parameters needing to be controlled is small, and the machining quality is easy to control.

Description

Technical Field

[0001] The present invention belongs to the technical field of tool processing, and particularly relates to a method for hardening a cutting edge using a steel bar and a cutting edge jig. Background Art

[0002] Hardening of the cutting edge steel bar is a method for treating the cutting edge. In the existing cutting edge hardening technologies, most are laser cladding technologies, also known as cladding powders, which are costly and have requirements for the management environment.

[0003] For example, the Chinese invention patent with the patent number CN202110038015.7 discloses a cutting edge cladding device for taking a tool with a manipulator for cutting edge cladding; it includes an automatic tool pushing mechanism, a cladding machine table, and an automatic feeding mechanism. On one side of the cladding machine table, there is a first installation platform, and on the other side of the cladding machine table, there is a second installation platform. On the first installation platform, there is a laser cladding head installation bracket, and on the laser cladding head installation bracket, there is a laser cladding head. On the second installation platform, there is a manipulator. The manipulator drives the gripper assembly to take a tool from the automatic tool pushing mechanism and move it to directly below the laser cladding head. The laser cladding head clads the cutting edge of the tool, and the manipulator drives the tool to move below the laser cladding head according to the set cladding trajectory; using the manipulator to drive the movement of the gripper assembly, and the manipulator drives the gripper assembly to operate according to the movement trajectory set by the computer, which can replace the work of manual material taking and cladding.

[0004] Although the above patent document solves some problems in the prior art, however, for the clamping of the tool in the above patent document, the gripper assembly includes a clamping jaw cylinder. The clamping jaw cylinder controls the opening and closing of two clamping arms to vertically clamp the tool with the cutting edge facing up. On the corresponding surfaces of the two clamping arms, there are clamping blocks. The laser cladding head clads the cutting edge of the tool, and the manipulator drives the tool to move and clad below the laser cladding head according to the set cladding trajectory. Through analysis, the following problems exist in the above powder cutting edge hardening processing method: 1. During the processing, the cutting edges of the tools are all processed in an upright manner, and the change in the Z-axis height needs to be considered in the writing of the processing path; 2. During the powder cutting edge hardening processing, a single tool needs to be clad back and forth multiple times to complete the processing of a single tool, resulting in low processing efficiency; 3. During the powder cutting edge hardening process, multiple working parameters such as laser power, laser focal length, powder output, shielding gas volume, moving speed, and cladding passes need to be controlled, and the processing process control is complex.

[0005] Therefore, it is necessary to design a method for hardening a cutting edge using a steel bar and a cutting edge jig to achieve the simplification and high efficiency of the processing process. Summary of the Invention

[0006] Aiming at the defects in the prior art, the purpose of the present invention is to provide a method for hardening the edge of a tool with a steel bar and an edge tooling fixture. The edge tooling fixture includes a base, and a steel bar positioning station and a steel bar welding station are successively arranged on the top surface of the base from top to bottom; the steel bar positioning station is used for laser welding multi-point positioning of the steel bar and the edge of the tool to be processed to obtain a tool after laser edge positioning; the steel bar welding station is used for laser welding the contact surface between the edge of the tool after laser edge positioning and the steel bar to obtain a processed tool; when processing the tool with the above edge tooling fixture in the present invention, the tool is processed in a lying manner, and the Z-axis height change does not need to be considered in the path programming, and the laser welding processing method only needs to be processed once to complete the hardening processing of a single tool. The processing process is simple and efficient, and only working parameters such as laser power, moving speed, and shielding gas volume need to be controlled during the laser processing, and the processing quality is relatively easy to control.

[0007] The technical problem to be solved by the present invention is to provide an edge tooling fixture for hardening the edge of a tool with a steel bar in view of the above deficiencies in the prior art. The first aspect includes a base, and a steel bar positioning station and a steel bar welding station are successively arranged on the top surface of the base from top to bottom; The steel bar positioning station is used for laser welding multi-point positioning of the steel bar and the edge of the tool to be processed to obtain a tool after laser edge positioning; The steel bar welding station is used for laser welding the contact surface between the edge of the tool after laser edge positioning and the steel bar to obtain a processed tool.

[0008] Preferably, the steel bar positioning station is a groove one recessed in the top surface of the base. A steel bar groove one for accommodating the steel bar is arranged at the upper end of the groove one. Positioning protrusions one and two for positioning the side of the tool are respectively arranged at the left and right ends of the groove one, and the lower end of the groove one is an open structure.

[0009] Preferably, the steel bar welding station is a groove two recessed in the top surface of the base. A steel bar groove two for accommodating the steel bar positioned on the edge of the tool is arranged at the lower end of the groove two. Positioning protrusions three and four for positioning the side of the tool are respectively arranged at the left and right ends of the groove two, and the lower end of the groove two is an open structure.

[0010] Preferably, a cylinder pushing device for positioning the back of the tool is arranged at the lower end and the upper end of the top surface of the base respectively.

[0011] Preferably, the cylinder pushing device includes two groups of cylinders. A push block is fixedly arranged at the top of the push rod of each group of cylinders, and a positioning block is detachably and fixedly connected to the top of the push block.

[0012] Preferably, the positioning block includes a positioning block body, a countersunk bolt hole for installing and disassembling the positioning block is provided on the positioning block body, a positioning groove is provided on the side surface of the positioning block facing the tool, and the surface of the positioning groove in contact with the tool is an inclined surface.

[0013] Preferably, the steel bar positioning station further includes a pressing plate for limiting the steel bar from the top surface. The pressing plate is composed of an integrally formed mounting portion and a limiting portion. The limiting portion is concave inward relative to the mounting portion to form a pressing groove. A plurality of first laser positioning points are equidistantly distributed along the length direction of the pressing groove on the pressing plate. The first laser positioning points are arc grooves penetrating the pressing plate. The beveled portion at the top end of the pressing plate along the length direction of the pressing groove is the second laser positioning point. The arc chamfered portion at the bottom end of the pressing plate along the length direction of the pressing groove is the third laser positioning point.

[0014] Preferably, a pressing plate positioning hole is provided on the mounting portion of the pressing plate between the steel bar positioning station and the steel bar welding station on the base, and a pressing plate fixing hole corresponding to the position of the pressing plate positioning hole is provided on the pressing plate.

[0015] Preferably, the second steel bar groove penetrates the base and is processed by wire cutting.

[0016] In a second aspect, the present invention provides a method for hardening the cutting edge with a steel bar. The method uses a cutting edge jig to harden the cutting edge. The method includes the following steps: The first step: Place the steel bar in the first steel bar groove of the steel bar positioning station; The second step: Place the tool to be processed in the first groove of the steel bar positioning station, and make the cutting edge of the tool to be processed abut against the side surface of the steel bar; The third step: Start the air cylinder to push the push rod to drive the positioning block to move towards the tool to be processed until the positioning groove of the positioning block abuts against the back of the tool to be processed. The air cylinder continues to push the push rod to make the positioning groove of the positioning block tightly fit against the back of the tool to be processed with a certain pressure; The fourth step: Align the pressing plate positioning hole and the pressing plate fixing hole on the pressing plate and fix them with bolts; The fifth step: Use a laser welding machine to perform laser welding positioning on the second laser positioning point, the third laser positioning point, and a plurality of first laser positioning points to obtain a tool after laser cutting edge positioning; The sixth step: Remove the tool after laser cutting edge positioning in the fifth step, and place the tool after laser cutting edge positioning in the second groove of the steel bar welding station, and adjust the position of the steel bar so that it is located in the second steel bar groove; Step 7: Start the cylinder to push the push rod, driving the positioning block to move towards the tool after laser edge positioning until the positioning groove of the positioning block abuts against the back of the tool. The cylinder continues to push the push rod to make the positioning groove of the positioning block tightly press and fit against the back of the tool with a certain pressure; Step 8: Use a laser welding machine to perform laser welding on the contact surface between the edge of the tool after laser edge positioning in Step 7 and the steel strip. The laser welding process uses the laser single-sided penetration process to obtain the processed tool.

[0017] Compared with the prior art, the positive effects of the present invention are: (1) Compared with the prior art's method of cladding the edge of the tool with powder edge hardening, during the processing, the tool is in an upright processing state. Since the contour of the edge is a curve distribution on the Z-axis, when programming the processing path, the change in the Z-axis height needs to be considered. However, in the method of hardening the edge with a steel strip and the edge jig in the present invention, a lying processing method is adopted during the tool processing, and the change in the Z-axis height does not need to be considered when programming the processing path. Obviously, the processing path programming in the present invention is simple and easy to operate; (2) Compared with the prior art's method of cladding the edge of the tool with powder edge hardening, during the processing, a single tool needs to be clad back and forth multiple times to complete the processing of a single tool. However, in the method of hardening the edge with a steel strip and the edge jig in the present invention, during the hardening process of the steel strip edge, a method of tightly fitting a conventional metal material and a high-performance ACUTO440 steel strip is adopted and placed at the steel strip positioning station, and then fixed with a cylinder and a pressing plate. First, laser edge positioning is performed to harden the steel strip; after the laser positioning is completed, it is placed at the steel strip welding station for laser welding. The laser welding uses the laser single-sided penetration process and only needs to be processed once to complete the hardening processing of a single tool. Obviously, the processing technology in the present invention is simple and has high efficiency; At the same time, the fixing method of the edge jig in the present invention is to set a "cylinder pushing device" and a "positioning groove conforming to the edge width" at the back of the edge to achieve the effect of double fixation for the edge. When positioning the hardened steel strip for the edge and the edge substrate, a method of tight fitting is required to ensure the stability of the tool during the tool processing; (3) Compared with the method of blade cladding with hardened powder edge in the prior art, during the processing, due to the need to consider the influence of the curve distribution of the powder and the contour of the blade on the Z-axis on the processing accuracy, therefore, multiple working parameters such as laser power, laser focal length, powder output, shielding gas volume, moving speed, and cladding passes need to be controlled; while for the method of hardening the edge with a steel bar and the edge fixture in the present invention, during the hardening process of the steel bar edge, only several working parameters such as laser power, moving speed, and shielding gas volume need to be controlled. Compared with the working parameters of the powder edge hardening method, the number of working parameters that need to be controlled in the present invention is smaller, and it is easier to control the quality of the processed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the tool after processing in the present invention; Figure 2 is a schematic structural diagram of the steel bar in the present invention; Figure 3 is a schematic structural diagram of the base in the present invention; Figure 4 is a front view structural diagram of the pressing plate in the present invention; Figure 5 is a side view structural diagram of the pressing plate in the present invention; Figure 6 is a three-view drawing of the positioning block in the present invention; Figure 7 is a schematic structural diagram of the cylinder pushing device in the present invention; Figure 8 is a schematic assembly structural diagram of the edge fixture in the present invention; The reference signs in the drawings are: 1 - tool, 11 - tool body part, 12 - hardened part, 2 - steel bar, 3 - base, 31 - first cylinder mounting hole, 32 - first base mounting hole, 33 - second groove, 34 - fourth positioning protrusion, 35 - second steel bar groove, 36 - pressing plate mounting part, 37 - second positioning protrusion, 38 - first groove, 39 - second base mounting hole, 310 - second cylinder mounting hole, 311 - first positioning protrusion, 312 - third positioning protrusion, 313 - pressing plate positioning hole, 4 - pressing plate, 41 - mounting part, 42 - first laser positioning point, 43 - limiting part, 44 - pressing plate fixing hole, 5 - positioning block, 51 - positioning block body, 52 - countersunk bolt hole, 53 - positioning groove, 6 - cylinder pushing device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following Figure 1-8 further describes the present invention in combination with

[0020] See the attached Figure 1, which is a schematic structural view of the tool 1 after processing in the present invention. It is composed of a tool body part 11 and a hardening part 12. Among them, the hardening part 12 is formed by laser welding a steel bar 2 to the tool body part 11.

[0021] See the appendix Figure 2 , which is a schematic structural view of the steel bar 2 in the present invention. Its shape is adapted to the cutting edge part of the tool body part 11, and its length is longer than the length of the cutting edge part of the tool body part 11.

[0022] See the appendix Figures 3-8 , the present invention conceives a cutting edge jig for hardening the cutting edge with a steel bar, including a base 3. On the top surface of the base 3, a steel bar positioning station and a steel bar welding station are successively arranged from top to bottom; The steel bar positioning station is used for laser welding multi-point positioning of the steel bar 2 and the cutting edge of the tool to be processed to obtain the tool after laser cutting edge positioning; The steel bar welding station is used for laser welding the contact surface between the cutting edge of the tool after laser cutting edge positioning and the steel bar 2 to obtain the processed tool 1; Among them, two first base mounting holes 32 are arranged at the upper end of the top surface of the base 3, and two second base mounting holes 39 are arranged at the lower end of the top surface of the base 3. The base 3 is detachably and fixedly installed on the base platform through the two first base mounting holes 32 and the two second base mounting holes 39.

[0023] The steel bar positioning station is a groove 38 recessed in the top surface of the base 3. A steel bar groove 1 for accommodating the steel bar 2 is arranged at the upper end of the groove 38. Positioning protrusions 311 and 37 for positioning the side of the tool are respectively arranged at the left and right ends of the groove 38. The lower end of the groove 38 is an open structure; The steel bar welding station is a groove 33 recessed in the top surface of the base 3. A steel bar groove 35 for accommodating the steel bar 2 positioned on the cutting edge of the tool is arranged at the lower end of the groove 33. Positioning protrusions 312 and 34 for positioning the side of the tool are respectively arranged at the left and right ends of the groove 38. The lower end of the groove 33 is an open structure; Cylinder pushing devices 6 for positioning the back of the tool are respectively arranged at the lower end and the upper end of the top surface of the base 3; the cylinder pushing device 6 includes two groups of cylinders. A push block is fixedly arranged at the top of the push rod of each group of cylinders. A positioning block 5 is detachably and fixedly connected to the top of the push block; Each group of cylinders in the cylinder pushing device 6 at the lower end of the top surface of the base 3 is detachably and fixedly connected to the top surface of the base 3 through a group of second cylinder mounting holes 310. The number of the group of second cylinder mounting holes 310 is three; Each cylinder in the cylinder pushing device 6 at the upper end of the top surface of the base 3 is detachably and fixedly connected to the top surface of the base 3 through a set of first cylinder mounting holes 31, and the number of the set of first cylinder mounting holes 31 is three; The positioning block 5 includes a positioning block body 51. A countersunk bolt hole 52 for installing and disassembling the positioning block 5 is provided on the positioning block body 51. A positioning groove 53 is provided on the side surface of the positioning block 5 facing the tool, and the surface of the positioning groove 53 in contact with the tool is an inclined surface; The steel bar positioning station further includes a pressing plate 4 for limiting the steel bar 2 from the top surface. The pressing plate 4 is composed of an integrally formed mounting portion 41 and a limiting portion 43. The limiting portion 43 is recessed inward relative to the mounting portion 41 to form a pressing groove. A plurality of first laser positioning points 42 are equidistantly distributed along the length direction of the pressing groove on the pressing plate 4. The first laser positioning points 42 are arc grooves penetrating the pressing plate 4. The beveled portion at the top end of the pressing plate 4 along the length direction of the pressing groove is the second laser positioning point 42, and the arc chamfered portion at the bottom end of the pressing plate 4 along the length direction of the pressing groove is the third laser positioning point 42; A pressing plate positioning hole 313 is provided on the pressing plate mounting portion 36 of the base 3 between the steel bar positioning station and the steel bar welding station. A pressing plate fixing hole 44 corresponding to the position of the pressing plate positioning hole 313 is provided on the pressing plate 4; The second steel bar groove 35 penetrates the base 3 and is processed by wire cutting.

[0024] The present invention also provides a method for hardening the edge of a tool with a steel bar. The method uses the above-mentioned tool for hardening the edge of a tool with a steel bar to harden the edge of the tool. The method includes the following steps: The first step: Place the steel bar 2 in the first steel bar groove of the steel bar positioning station; The second step: Place the tool to be processed in the first groove 38 of the steel bar positioning station, and make the edge of the tool to be processed abut against the side surface of the steel bar 2; The third step: Start the cylinder to push the push rod to drive the positioning block 5 to move towards the tool to be processed until the positioning groove 53 of the positioning block 5 abuts against the back of the tool to be processed. The cylinder continues to push the push rod to make the positioning groove 53 of the positioning block 5 tightly fit against the back of the tool to be processed with a certain pressure; The fourth step: Align the pressing plate positioning hole 313 on the pressing plate 4 with the pressing plate fixing hole 44 and fix them with bolts; The fifth step: Use a laser welding machine to perform laser welding positioning on the second laser positioning point 42, the third laser positioning point 42, and a plurality of first laser positioning points 42 to obtain a tool after laser edge positioning; Step 6: Remove the tool after laser edge positioning in Step 5, place the tool after laser edge positioning in the groove 33 of the steel bar welding station, and adjust the position of the steel bar 2 so that it is located in the second steel bar groove 35; Step 7: Start the cylinder to push the push rod to drive the positioning block 5 to move towards the tool after laser edge positioning until the positioning groove 53 of the positioning block 5 abuts against the back of the tool, and the cylinder continues to push the push rod to make the positioning groove 53 of the positioning block 5 tightly press against the back of the tool with a certain pressure; Step 8: Use a laser welding machine to perform laser welding on the contact surface between the edge of the tool after laser edge positioning in Step 7 and the steel bar. The laser welding process uses the laser single-sided penetration process to obtain the processed tool 1.

[0025] Compared with the prior art, the positive effects of the present invention are: (1) Compared with the prior art's method of cladding the edge of a tool with hardened powder, during the processing, the tool is in an upright processing state. Since the contour of the edge is a curve distribution on the Z-axis, when programming the processing path, the change in the Z-axis height needs to be considered. However, in the method of hardening the edge with a steel bar and the edge fixture in the present invention, the tool is in a lying processing state during the tool processing, and the change in the Z-axis height does not need to be considered when programming the processing path. Obviously, the processing path programming in the present invention is simple and easy to operate; (2) Compared with the prior art's method of cladding the edge of a tool with hardened powder, during the processing, a single tool needs to be clad back and forth multiple times to complete the processing of a single tool. However, in the method of hardening the edge with a steel bar and the edge fixture in the present invention, during the hardening process of the steel bar edge, a conventional metal material and a high-performance ACUTO440 steel bar are placed in a tightly fitting manner into the steel bar positioning station, fixed with a cylinder and a pressing plate, and the steel bar is first hardened by laser edge positioning. After the laser positioning is completed, it is placed in the steel bar welding station for laser welding. The laser welding uses the laser single-sided penetration process and only needs to be processed once to complete the hardening process of a single tool. Obviously, the processing technology in the present invention is simple and has high efficiency; At the same time, the fixing method of the edge fixture in the present invention is to set a "cylinder pushing device" and a "positioning groove conforming to the edge width" at the back of the cutting edge to achieve the effect of double fixation of the cutting edge. When positioning the hardened steel bar of the edge and the cutting edge substrate, a tightly fitting method is required, which realizes the stability of the tool during the tool processing; (3) Compared with the existing method of hardening the blade by cladding with powder on the blade edge, during the processing, due to the need to consider the influence of the curve distribution of the powder and the contour of the blade edge on the Z-axis on the processing accuracy, therefore, multiple working parameters such as laser power, laser focal length, powder output, shielding gas flow rate, moving speed, and number of cladding passes need to be controlled; while for the method of hardening the blade edge with a steel bar and the blade edge fixture in the present invention, during the hardening process of the steel bar blade edge, only several working parameters such as laser power, moving speed, and shielding gas flow rate need to be controlled. Compared with the working parameters of the powder blade edge hardening method, the number of working parameters that need to be controlled in the present invention is smaller, and it is easier to control the quality of the processed product.

[0026] The above only reflects the preferred technical solutions of the present invention. Some changes that those skilled in the art may make to some parts thereof all reflect the principles of the present invention and should fall within the technical scope of the present invention.

Claims

1. A cutting tool jig for hardening the cutting edge with steel bars, characterized in that, It includes a base (3), on the top surface of which there are successively arranged a steel bar positioning station and a steel bar welding station from top to bottom; The steel bar positioning station is used for multi-point laser welding positioning of the steel bar (2) and the cutting edge of the tool to be processed to obtain a tool after laser cutting edge positioning; The steel bar welding station is used for laser welding the contact surface between the cutting edge of the tool after laser cutting edge positioning and the steel bar (2) to obtain the processed tool (1).

2. A cutting tool jig for hardening the cutting edge with steel bars as described in claim 1, characterized in that, The steel bar positioning station is a first groove (38) concave in the top surface of the base (3). At the upper end of the first groove (38), there is a first steel bar groove for accommodating the steel bar (2). At the left and right ends of the first groove (38), there are respectively a first positioning protrusion (311) and a second positioning protrusion (37) for positioning the side of the tool. The lower end of the first groove (38) is of an open structure.

3. The edge tool for hardening the edge with steel bars as described in claim 2, characterized in that, The steel bar welding station is a second groove (33) concave in the top surface of the base (3). At the lower end of the second groove (33), there is a second steel bar groove (35) for accommodating the steel bar (2) positioned on the cutting edge of the tool. At the left and right ends of the second groove (38), there are respectively a third positioning protrusion (312) and a fourth positioning protrusion (34) for positioning the side of the tool. The lower end of the second groove (33) is of an open structure.

4. A cutting tool fixture for hardening the cutting edge with steel bars as described in claim 2, wherein At the lower and upper ends of the top surface of the base (3), there are respectively cylinder pushing devices (6) for positioning the back of the tool.

5. The edge tool for hardening the edge with steel bars as described in claim 4, characterized in that, The cylinder pushing device (6) includes two groups of cylinders. At the top of the push rod of each group of cylinders, there is a push block fixedly arranged, and a positioning block (5) is detachably and fixedly connected to the top of the push block.

6. The edge fixture for hardening the edge with steel bars as described in claim 5, characterized in that The positioning block (5) includes a positioning block body (51). On the positioning block body (51), there are countersunk bolt holes (52) for installing and disassembling the positioning block (5). On the side of the positioning block (5) facing the tool, there is a positioning groove (53), and the surface of the positioning groove (53) in contact with the tool is an inclined surface.

7. The edge tool for hardening the edge with steel bars according to claim 6, characterized in that, The steel bar positioning station further includes a pressing plate (4) for limiting the steel bar (2) from the top. The pressing plate (4) is composed of an integrally formed installation part (41) and a limiting part (43). The limiting part (43) is concave inward relative to the installation part (41) to form a pressing groove. Along the length direction of the pressing groove on the pressing plate (4), there are a plurality of first laser positioning points (42) equidistantly distributed. The first laser positioning points (42) are arc grooves penetrating the pressing plate (4). The beveled part at the top end of the pressing plate (4) along the length direction of the pressing groove is the second laser positioning point (42), and the arc chamfer part at the bottom end of the pressing plate (4) along the length direction of the pressing groove is the third laser positioning point (42).

8. A cutting tool fixture for hardening the cutting edge with steel bars as described in claim 7, characterized in that, On the pressing plate installation part (36) of the base (3) between the steel bar positioning station and the steel bar welding station, there is a pressing plate positioning hole (313), and on the pressing plate (4), there is a pressing plate fixing hole (44) corresponding to the position of the pressing plate positioning hole (313).

9. A cutting tool fixture for hardening the cutting edge with a steel bar as described in claim 8, characterized in that, The second steel bar groove (35) penetrates the base (3) and is processed by wire cutting.

10. A method for hardening the edge of a tool using steel bars, wherein the method uses an edge fixture for hardening the edge of a tool using steel bars as described in any one of claims 1-9 to harden the edge of the tool, characterized in that The method includes the following steps: Step 1: Place the steel bar (2) in the first steel bar groove of the steel bar positioning station; Step 2: Place the tool to be processed in the first groove (38) of the steel bar positioning station, and make the cutting edge of the tool to be processed abut against the side surface of the steel bar (2); Step 3: Start the air cylinder to push the push rod, driving the positioning block (5) to move towards the tool to be processed until the positioning groove (53) of the positioning block (5) abuts against the back of the tool to be processed. The air cylinder continues to push the push rod to make the positioning groove (53) of the positioning block (5) press and fit against the back of the tool to be processed with a certain pressure; Step 4: Align the pressure plate positioning hole (313) on the pressure plate (4) with the pressure plate fixing hole (44) and fix them with bolts; Step 5: Use a laser welding machine to perform laser welding positioning on the second laser positioning point (42), the third laser positioning point (42) and multiple first laser positioning points (42) to obtain a tool after laser cutting edge positioning; Step 6: Remove the tool after laser cutting edge positioning in Step 5, and place the tool after laser cutting edge positioning in the second groove (33) of the steel bar welding station, and adjust the position of the steel bar (2) so that it is located in the second steel bar groove (35); Step 7: Start the air cylinder to push the push rod, driving the positioning block (5) to move towards the tool after laser cutting edge positioning until the positioning groove (53) of the positioning block (5) abuts against the back of the tool. The air cylinder continues to push the push rod to make the positioning groove (53) of the positioning block (5) press and fit against the back of the tool with a certain pressure; Step 8: Use a laser welding machine to perform laser welding on the contact surface between the cutting edge of the tool after laser cutting edge positioning in Step 7 and the steel bar. The laser welding process uses a laser single-sided penetration welding process to obtain the processed tool (1).

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