A method for optimizing welding parameters of diamond saw blade laser welding process

Abstract

The invention relates to the field of welding simulation technology, and discloses a method for optimizing welding parameters of a diamond saw blade laser welding process, the method comprising: creating a three-dimensional welding model of a diamond saw blade, the three-dimensional welding model of the diamond saw blade comprising a finite element model of a substrate, a substrate welding layer, a cutter head transition layer, and a cutter head working layer; defining material property parameters of the substrate, the substrate welding layer, the cutter head transition layer, and the cutter head working layer according to data in a material database, and defining welding parameters for laser welding; using the created three-dimensional welding model and the defined material property parameters and welding parameters as conditions, using SYSWELD to perform computational simulation on the welding process; performing data analysis on welding simulation results under different laser welding parameters to obtain optimal welding parameters. The method can accurately simulate the laser welding process of welded parts, obtain optimal welding parameters, improve work efficiency, and save manpower and material resources.

Description

Technical Field

[0001] The invention relates to the technical field of welding simulation, and in particular to a method for optimizing welding parameters of a diamond saw blade laser welding process and a diamond saw blade. Background Art

[0002] For laser welding diamond tools, laser welding transition layer development technology and welding technology are the key technologies for making laser welding saw blades. With the increasing requirements of the international professional market for superhard material tools for the safety, reliability and performance of diamond saw blades, laser welding diamond saw blades have obvious advantages in safety and stability. Laser welding saw blades are composed of three parts: the working layer of the cutter head, the transition layer and the matrix. The structure of the cutter head also has different degrees of influence on the welding strength. The material properties of the transition layer and the matrix also affect the strength of laser welding. At the same time, the process parameters of laser welding have the most direct impact on the welding strength. Therefore, for laser welding saw blades, the traditional method is to use the "trial and error method" for experimental welding to obtain the process parameters of laser welding, and then carry out the actual production welding operation of laser welding saw blades. However, due to the difficulty of diamond welding, high requirements, and easy welding defects, it takes a lot of manpower and material resources to obtain the welding process parameters by traditional methods, and it will also take a lot of time. Therefore, how to efficiently and accurately obtain the optimal welding process parameters of laser welding saw blades and save manpower and material resources is a problem that needs to be studied urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a method for optimizing the welding parameters of the diamond saw blade laser welding process and a diamond saw blade. In this method, the finite element model is combined with data analysis, and the laser welding process of the welded parts can be accurately simulated in the software to obtain the optimal welding parameters, which greatly improves the work efficiency, saves manpower and material resources, and reduces the experimental cost. The welding parameters can be quickly and repeatedly adjusted to carry out simulation experiments, and more accurate welding parameters can be efficiently obtained, providing theoretical guidance for the actual laser welding process of the diamond saw blade, so that the welding efficiency in the actual welding process can be increased by more than 30%, effectively improving the welding efficiency of the actual welding.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A method for optimizing welding parameters of a diamond saw blade laser welding process, comprising:

[0006] Creating a three-dimensional welding model of a diamond saw blade, wherein the three-dimensional welding model of the diamond saw blade includes a finite element model of a substrate, a substrate welding layer, a cutter head transition layer, and a cutter head working layer;

[0007] The material property parameters of the substrate, the substrate welding layer, the tool head transition layer and the tool head working layer are defined according to the data in the material database, and the welding parameters of the laser welding are defined;

[0008] Using the created three-dimensional welding model and defined material property parameters and welding parameters as conditions, SYSWELD is used to perform computational simulation on the welding process;

[0009] Data analysis is performed on the welding simulation results under different laser welding parameters to obtain the optimal welding parameters.

[0010] In the above method for optimizing the welding parameters of the diamond saw blade laser welding process, a finite element model and material property definition of the welded part are established, and the finite element model is combined with data analysis. The laser welding process of the welded part can be accurately simulated in the software to obtain the optimal welding parameters, which greatly improves work efficiency, saves manpower and material resources, and reduces experimental costs. The welding parameters can be adjusted quickly and multiple times to conduct simulation experiments, and more accurate welding parameters can be efficiently obtained, providing theoretical guidance for the actual laser welding process of the diamond saw blade, so that the welding efficiency can be increased by more than 30% in the actual welding process, effectively improving the welding efficiency of the actual welding.

[0011] Optionally, the material property parameters of the tool head transition layer include material composition parameters and preparation process parameters, wherein the material composition parameters of the tool head transition layer are: 40% to 60% iron-nickel alloy powder, 10% to 25% copper powder, 10% to 30% carbonyl nickel powder, 15% to 30% cobalt powder, and 5% to 15% nickel powder; wherein the proportion of each component is the weight proportion;

[0012] The material composition parameter of the base welding layer is 30CrMo.

[0013] Optionally, the preparation process parameters include: batching process parameters, mixing process parameters, molding parameters and sintering parameters.

[0014] Optionally, the batching process parameters include: mixing iron-nickel alloy powder, copper powder, carbonyl nickel powder, cobalt powder, and nickel powder according to a preset weight ratio to obtain transition layer powder;

[0015] The mixing process parameters include: adding glycerin to the transition layer powder in a mixer and mixing for 1 hour, mixing evenly and then cold pressing;

[0016] The molding parameters include: cold pressing the uniformly mixed transition layer powder into a blade-tooth-shaped compact;

[0017] The sintering parameters include: placing the compact into a mold for hot pressing and sintering;

[0018] Preferably, in the sintering parameters, the green compact is placed in a mold for hot pressing and sintering, followed by an arc grinding process.

[0019] Optionally, the material composition parameters of the tool head transition layer are 40% to 60% iron-nickel alloy powder, 10% to 25% copper powder, 10% to 15% carbonyl nickel powder, 15% to 25% cobalt powder, and 5% to 10% nickel powder;

[0020] Preferably, the material composition parameters of the tool bit transition layer are 40% iron-nickel alloy powder, 10% copper powder, 15% carbonyl nickel powder, 20% cobalt powder, and 15% nickel powder; or, the material composition parameters of the tool bit transition layer are 45% iron-nickel alloy powder, 15% copper powder, 10% carbonyl nickel powder, 25% cobalt powder, and 5% nickel powder.

[0021] Optionally, the average particle size D50 of the iron-nickel alloy powder is 3 microns to 8 microns; the average particle size D50 of the copper powder is 5 microns to 10 microns; the average particle size D50 of the carbonyl nickel powder is 2 microns to 4 microns; and the average particle size D50 of the cobalt powder is 3 microns to 6 microns.

[0022] Optionally, the step of creating a three-dimensional welding model of a diamond saw blade specifically includes:

[0023] Creating a finite element model of the substrate, performing meshing, and refining and adjusting the corresponding parts of the welding location;

[0024] Creating a finite element model of the substrate welding layer based on the finite element model of the substrate, performing meshing, and performing refinement and adjustment on the welding point;

[0025] Creating a finite element model of the tool head transition layer, performing meshing, and performing refinement and adjustment on the welding position;

[0026] A finite element model of the tool head working layer is created based on the finite element model of the tool head transition layer, and detailed adjustments are made to the parts corresponding to the welding locations.

[0027] Optionally, the welding parameters include: welding speed, weld size, weld penetration, welding power, welding energy and welding energy utilization rate.

[0028] Based on the same inventive concept, the present solution also provides a diamond saw blade, comprising: a substrate and a cutter head connected to the substrate, a substrate welding layer is provided on the outer peripheral side of the substrate, the cutter head comprises a cutter head transition layer and a cutter head working layer, wherein the substrate welding layer and the cutter head transition layer are laser welded by using the optimal welding parameters obtained by any method for optimizing the welding parameters of the diamond saw blade laser welding process according to any one of the above technical solutions.

[0029] Optionally, the material composition of the tool head transition layer is: 40% to 60% iron-nickel alloy powder, 10% to 25% copper powder, 10% to 30% carbonyl nickel powder, 15% to 30% cobalt powder, and 5% to 15% nickel powder; the proportion of each component is by weight; the material of the base welding layer is 30CrMo;

[0030] Preferably, the material composition of the tool head transition layer is: 40% to 60% iron-nickel alloy powder, 10% to 25% copper powder, 10% to 15% carbonyl nickel powder, 15% to 25% cobalt powder, and 5% to 10% nickel powder;

[0031] Preferably, the material composition of the tool head transition layer is: 40% iron-nickel alloy powder, 10% copper powder, 15% carbonyl nickel powder, 20% cobalt powder, and 15% nickel powder; or, the material composition of the tool head transition layer is: 45% iron-nickel alloy powder, 15% copper powder, 10% carbonyl nickel powder, 25% cobalt powder, and 5% nickel powder;

[0032] Preferably, the average particle size D50 of the iron-nickel alloy powder is 3 microns to 8 microns; the average particle size D50 of the copper powder is 5 microns to 10 microns; the average particle size D50 of the carbonyl nickel powder is 2 microns to 4 microns; and the average particle size D50 of the cobalt powder is 3 microns to 6 microns. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0034] Figure 1 A schematic flow chart of a method for optimizing welding parameters of a diamond saw blade laser welding process provided by an embodiment of the present invention;

[0035] Figure 2-Figure 5 A schematic diagram of the model structure changes during the creation of a three-dimensional model of a diamond saw blade in a method for optimizing welding parameters of a diamond saw blade laser welding process provided by an embodiment of the present invention;

[0036] Figure 6 A schematic structural diagram of a diamond saw blade provided in an embodiment of the present invention.

[0037] Icon: 1-substrate; 2-substrate welding layer; 3-cutter head transition layer; 4-cutter head working layer. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0039] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] refer to Figures 1 to 5 As shown, the present invention provides a method for optimizing welding parameters of a diamond saw blade laser welding process, wherein:

[0041] First, refer to Figure 2 , Figure 2 The schematic diagram of the finite element model of the created substrate. According to step S101, a three-dimensional welding model of the diamond saw blade is created, and a finite element model is created in a three-dimensional modeling software (such as Solidworks) according to the actual weldment of the diamond saw blade, wherein the three-dimensional welding model of the diamond saw blade includes a finite element model of a substrate 1, a substrate welding layer 2, a cutter head transition layer 3, and a cutter head working layer 4, wherein the substrate 1 and the substrate welding layer 2 are one of the welded parts, and the cutter head transition layer 3 and the cutter head working layer 4 are one welded part, and specifically, the substrate welding layer 2 and the cutter head transition layer 3 are welded.

[0042] Then, refer to Figure 3 , Figure 3The schematic diagram of the finite element model of the created substrate 1 and substrate welding layer 2. According to step S102, the material property parameters of the substrate 1, substrate welding layer 2, and the cutter head transition layer 3 and cutter head working layer 4 are defined according to the data in the material database, and the welding parameters of laser welding are defined, the material properties of each structure in the actual diamond saw blade are simulated, the material property parameters of the substrate 1, substrate welding layer 2, and the cutter head transition layer 3 and cutter head working layer 4 are selected and set, and the welding parameters during laser welding are selected and set in the SYSWELD software according to the selection of actual experimental parameters.

[0043] Next, refer to Figure 4 , Figure 4 The finite element model of the created substrate 1, the substrate welding layer 2, and the finite element model of the tool head transition layer 3. According to step S103, the created welding three-dimensional model and the defined material property parameters and welding parameters are used as conditions, and the welding process is simulated using SYSWELD to simulate the welding process between the tool head transition layer 3 and the substrate welding layer 2. Specifically, the welding process simulation can be performed under different welding parameters for the welding three-dimensional model with the same material property parameters, and multiple welding simulation results can be obtained for the welding three-dimensional model with the same material property parameters.

[0044] Finally, refer to Figure 5 , Figure 5 The finite element models of the substrate 1, the substrate welding layer 2, and the finite element models of the cutter head transition layer 3 and the cutter head working layer 4 are created. According to step S104, the welding simulation results under different laser welding parameters are analyzed to obtain the optimal welding parameters. After the welding process is performed under various welding parameters of the welding three-dimensional model with the same material property parameters, the strength of the welded parts completed under each welding parameter can be tested, and the welding parameters corresponding to the welded parts with the best welding strength are the optimal welding parameters. The obtained optimal welding parameters can then be applied to the actual welding process of the diamond saw blade.

[0045] In the above method for optimizing the welding parameters of the laser welding process of diamond saw blades, a finite element model of the welded parts is established to define the material properties, and the finite element model is combined with data analysis. The laser welding process of the welded parts can be accurately simulated in the software to obtain the optimal welding parameters, which greatly improves work efficiency, saves manpower and material resources, and reduces experimental costs. The welding parameters can be adjusted quickly and multiple times to conduct simulation experiments, and more accurate welding parameters can be efficiently obtained, so that the welding parameters in the welding process can be optimized and better welding parameters can be obtained. Theoretical guidance is provided for the actual laser welding process of diamond saw blades, so that the welding efficiency can be increased by more than 30% in the actual welding process, effectively improving the welding efficiency of actual welding.

[0046] It should be noted that the above method is implemented based on software. The material database in the software contains the data of material properties required in the simulation experiment. The software has the data of welding parameters required in welding. Both material properties and welding parameters can be called when needed.

[0047] In the above-mentioned method for optimizing the welding parameters of the diamond saw blade laser welding process, the material property parameters of the cutter head transition layer 3 include material composition parameters and preparation process parameters, wherein the material composition parameters of the cutter head transition layer 3 are: iron-nickel alloy powder 40% to 60%, ultrafine copper powder 10% to 25%, carbonyl nickel powder 10% to 30%, ultrafine cobalt powder 15% to 30%, nickel powder 5% to 15%; wherein the proportion of each component is weight proportion; the material composition parameter of the substrate 1 is 30CrMo, the material composition parameter of the substrate welding layer 2 is 30CrMo, and the material composition parameter of the cutter head working layer 4 is diamond. In the software, select the same material property parameters as the material properties of the actual welded parts, especially the material composition of the tool head transition layer 3 is 40% to 60% iron-nickel alloy powder, 10% to 25% ultrafine copper powder, 10% to 30% carbonyl nickel powder, 15% to 30% ultrafine cobalt powder, and 5% to 15% nickel powder. Each component is in ultrafine powder form, which makes the tool head transition layer 3 more delicate and has higher welding toughness, making the welding strength between the tool head transition layer 3 and the base welding layer 2 higher, and the welding strength can reach more than 900Mpa. Among them, for the material composition of the tool head transition layer 3, you can make any selection and combination in the material library of the software according to the above weight ratio, and then simulate the welding process, so as to efficiently obtain the material of the tool head transition layer 3 with better welding effect.

[0048] Furthermore, the material composition parameters of the tool head transition layer 3 can be further optimized, so that the material composition parameters of the tool head transition layer 3 are 40% to 60% of iron-nickel alloy powder, 10% to 25% of ultrafine copper powder, 10% to 15% of carbonyl nickel powder, 15% to 25% of ultrafine cobalt powder, and 5% to 10% of nickel powder. Exemplarily, the material composition of the tool head transition layer 3 can be specifically 40% of iron-nickel alloy powder, 10% of ultrafine copper powder, 15% of carbonyl nickel powder, 20% of ultrafine cobalt powder, and 15% of nickel powder; or, the material composition of the tool head transition layer 3 is specifically 45% of iron-nickel alloy powder, 15% of ultrafine copper powder, 10% of carbonyl nickel powder, 25% of ultrafine cobalt powder, and 5% of nickel powder; or, the material composition of the tool head transition layer 3 is specifically 45% of iron-nickel alloy powder, 20% of ultrafine copper powder, 10% of carbonyl nickel powder, 20% of ultrafine cobalt powder, and 5% of nickel powder.

[0049] On the basis of the above method for optimizing the welding parameters of the laser welding process of the diamond saw blade, the particle size of each component of the tool head transition layer 3 is selected and set. Preferably, the average particle size D50 of the iron-nickel alloy powder is 3 microns to 8 microns; the average particle size D50 of the ultrafine copper powder is 5 microns to 10 microns; the average particle size D50 of the carbonyl nickel powder is 2 microns to 4 microns; the average particle size D50 of the ultrafine cobalt powder is 3 microns to 6 microns. For example, the average particle size D50 of the iron-nickel alloy powder can be 4 microns; the average particle size D50 of the ultrafine copper powder can be 7 microns; the average particle size D50 of the carbonyl nickel powder can be 3 microns; and the average particle size D50 of the ultrafine cobalt powder can be 4 microns. This makes the tool head transition layer 3 more delicate and has higher welding toughness, which is conducive to further improving the welding strength.

[0050] In a possible implementation, the above-mentioned preparation process parameters include: batching process parameters, mixing process parameters, molding parameters and sintering parameters, so that the tool head transition layer 3 simulates batching, mixing, molding and sintering processes in sequence.

[0051] Specifically, in the above-mentioned preparation process parameters, a batching process simulation is first performed, and the batching process parameters include: mixing iron-nickel alloy powder, ultrafine copper powder, carbonyl nickel powder, ultrafine cobalt powder, and nickel powder according to a preset weight ratio to obtain a transition layer powder; then a mixing process simulation is performed, and the mixing process parameters include: adding glycerin to the transition layer powder in a mixer and mixing for 1 hour, and cold pressing after mixing evenly; then, a molding process simulation is performed, and the molding parameters include: cold pressing the evenly mixed transition layer powder into a blade tooth shape green sheet; finally, a sintering process simulation is performed, and the sintering parameters include: loading the green sheet into a mold for hot pressing and sintering, wherein, in the sintering simulation, the green sheet is loaded into a mold for hot pressing and sintering, and then an arc grinding treatment is performed. Since the substrate 1 is circular and the cutter head is welded on the outer circular edge of the substrate 1, the sintered cutter head transition layer 3 is subjected to an arc grinding treatment on the side facing the substrate 1 that needs to be welded to adapt to the outer circle of the substrate, which is beneficial to improving the welding strength.

[0052] Specifically, in the sintering process simulation, the compact of the tool head transition layer 3 and the compact of the tool head working layer 4 can be assembled and hot pressed to obtain a diamond tool head, and then the welding simulation process of the diamond tool head and the substrate can be carried out.

[0053] In addition, in the above method for optimizing welding parameters of the diamond saw blade laser welding process, the welding parameters may include: welding speed, weld size, weld penetration, welding power, welding energy and welding energy utilization.

[0054] On the other hand, as an implementation method of creating a welding 3D model of a diamond saw blade, creating a welding 3D model of a diamond saw blade may specifically include:

[0055] Step S1, creating a finite element model of the substrate 1, and performing meshing, refining and adjusting the parts corresponding to the welding points, and obtaining a three-dimensional model of the substrate 1.

[0056] Step S2, creating a finite element model of the substrate welding layer 2 based on the finite element model of the substrate 1, and performing meshing, refining and adjusting the welding point to obtain a three-dimensional model of the substrate welding layer 2, wherein the substrate 1 and the substrate welding layer 2 are three-dimensional models connected together.

[0057] Step S3, creating a finite element model of the tool head transition layer 3, and performing meshing, refining and adjusting the welding position, and obtaining a three-dimensional model of the tool head transition layer 3.

[0058] Step S4, create a finite element model of the tool head working layer 4 based on the finite element model of the tool head transition layer 3, make detailed adjustments to the parts corresponding to the welding points, and obtain a three-dimensional model of the tool head working layer 4. The tool head transition layer 3 and the tool head working layer 4 are three-dimensional models connected together to form a three-dimensional model of the tool head.

[0059] It should be noted that the above finite element model creation follows the method of generating two-dimensional surfaces by points and lines, and the surfaces are stretched into three-dimensional entities. The refinement processing at the welding points of each model can be specifically to divide the grid more densely.

[0060] Based on the same inventive concept, Figure 6 As shown, the present embodiment further provides a diamond saw blade, comprising: a substrate 1 and a cutter head connected to the substrate 1, the substrate 1 being a disc structure, the substrate welding layer 2 being connected to the outer circumferential edge of the substrate 1, the cutter head comprising a cutter head transition layer 3 and a cutter head working layer 4, the substrate welding layer and the substrate being an integral structure, the substrate welding layer being a structure formed by the outer circumferential edge of the substrate for welding the cutter head, specifically, the outer circumference of the substrate 1 forms a sawtooth structure, the outer circumference of the substrate 1 forms a plurality of sawteeth, each sawteeth has a substrate welding layer 2 on the outer side, and each sawteeth is connected to a cutter head on the outer side, wherein the substrate welding layer 2 and the cutter head transition layer 3 are laser welded, and the welding parameters during the laser welding process of the substrate welding layer 2 and the cutter head transition layer 3 are obtained by the above-mentioned method for optimizing the welding parameters of the laser welding process of the diamond saw blade, and the diamond saw blade obtained by welding under the condition of optimal welding parameters has a high welding strength between the substrate welding layer 2 and the cutter head transition layer 3, which is beneficial to improving the structural strength of the diamond saw blade.

[0061] Specifically, in the above-mentioned diamond saw blade, the material of the substrate is 30CrMo, and the material of the substrate welding layer is 30CrMo; the material of the cutter head working layer is diamond, and the material composition of the cutter head transition layer is: 40% to 60% iron-nickel alloy powder, 10% to 25% ultrafine copper powder, 10% to 30% carbonyl nickel powder, 15% to 30% ultrafine cobalt powder, and 5% to 15% nickel powder; the proportion of each component is by weight, which can make the cutter head transition layer structure more delicate and the welding toughness higher. The welding strength can reach more than 900Mpa, effectively improving the welding strength between the substrate welding layer and the cutter head transition layer in the diamond saw blade, which is ahead of the welding strength level of welding materials in the prior art.

[0062] More specifically, the material composition of the tool head transition layer can be: 40% to 60% iron-nickel alloy powder, 10% to 25% ultrafine copper powder, 10% to 15% carbonyl nickel powder, 15% to 25% ultrafine cobalt powder, and 5% to 10% nickel powder. Exemplarily, the material composition of the tool head transition layer is: 40% iron-nickel alloy powder, 10% ultrafine copper powder, 15% carbonyl nickel powder, 20% ultrafine cobalt powder, and 15% nickel powder; or, the material composition of the tool head transition layer is: 45% iron-nickel alloy powder, 15% ultrafine copper powder, 10% carbonyl nickel powder, 25% ultrafine cobalt powder, and 5% nickel powder.

[0063] On the other hand, for the particle size setting of each component in the tool head transition layer, the average particle size D50 of the iron-nickel alloy powder is 3 microns to 8 microns; the average particle size D50 of the ultrafine copper powder is 5 microns to 10 microns; the average particle size D50 of the carbonyl nickel powder is 2 microns to 4 microns; the average particle size D50 of the ultrafine cobalt powder is 3 microns to 6 microns. For example, the average particle size D50 of the iron-nickel alloy powder can be 4 microns; the average particle size D50 of the ultrafine copper powder can be 7 microns; the average particle size D50 of the carbonyl nickel powder can be 3 microns; and the average particle size D50 of the ultrafine cobalt powder can be 4 microns. This makes the tool head transition layer structure more delicate and the welding toughness higher, which is conducive to further improving the welding strength.

[0064] The preparation of the diamond saw blade is described below with an example:

[0065] Example 1:

[0066] Weigh the transition layer powder of the tool head transition layer by weight: 40 parts of iron-nickel alloy powder, 10 parts of ultrafine copper powder, 15 parts of carbonyl nickel powder, 20 parts of ultrafine cobalt powder, and 15 parts of nickel powder; weigh and mix according to the above weight ratio to obtain transition layer powder; add glycerin to the transition layer powder of the above ingredients in a three-dimensional mixer and mix for 1 hour, and cold press after mixing evenly; cold press the mixed transition layer powder into a tooth shape according to the theoretical weight; load the cold-pressed transition layer blank and the tool head working layer blank into a graphite mold for hot pressing and sintering, and perform arc grinding after sintering to form a tool head; use a fiber laser welding machine to weld the tool head to the outer circle of the circular substrate prepared in advance, and the welded tooth strength can reach 956MPa.

[0067] Example 2:

[0068] Weigh the transition layer powder of the tool head transition layer by weight: 45 parts of iron-nickel alloy powder, 15 parts of ultrafine copper powder, 10 parts of carbonyl nickel powder, 20 parts of ultrafine cobalt powder, and 10 parts of nickel powder; weigh and mix according to the above weight ratio to obtain transition layer powder; add glycerin to the transition layer powder of the above ingredients in a three-dimensional mixer and mix for 1 hour, and cold press after mixing evenly; cold press the mixed transition layer powder into a tooth shape according to the theoretical weight; load the cold-pressed transition layer blank and the tool head working layer blank into a graphite mold for hot pressing and sintering, and perform arc grinding after sintering to form a tool head; use a fiber laser welding machine to weld the tool head to the outer circle of the circular substrate prepared in advance, and the welded tooth strength can reach 956MPa.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for optimizing welding parameters of a diamond saw blade laser welding process, characterized in that: include: Creating a three-dimensional welding model of a diamond saw blade, wherein the three-dimensional welding model of the diamond saw blade includes a finite element model of a substrate, a substrate welding layer, a cutter head transition layer, and a cutter head working layer; The material property parameters of the substrate, the substrate welding layer, the tool head transition layer and the tool head working layer are defined according to the data in the material database, and the welding parameters of the laser welding are defined; Using the created three-dimensional welding model and defined material property parameters and welding parameters as conditions, SYSWELD is used to perform computational simulation on the welding process; Perform data analysis on the welding simulation results under different laser welding parameters to obtain the optimal welding parameters; The material property parameters of the tool head transition layer include material composition parameters and preparation process parameters, wherein the material composition parameters of the tool head transition layer are: 40% to 60% iron-nickel alloy powder, 10% to 25% copper powder, 10% to 30% carbonyl nickel powder, 15% to 30% cobalt powder, and 5% to 15% nickel powder; wherein the proportion of each component is the weight proportion; The material composition parameter of the base welding layer is 30CrMo; The average particle size D50 of the iron-nickel alloy powder is 3 microns to 8 microns; the average particle size D50 of the copper powder is 5 microns to 10 microns; the average particle size D50 of the carbonyl nickel powder is 2 microns to 4 microns; and the average particle size D50 of the cobalt powder is 3 microns to 6 microns.

2. The method for optimizing welding parameters of a diamond saw blade laser welding process according to claim 1, characterized in that: The preparation process parameters include: batching process parameters, mixing process parameters, molding parameters and sintering parameters; The batching process parameters include: mixing iron-nickel alloy powder, copper powder, carbonyl nickel powder, cobalt powder, and nickel powder according to a preset weight ratio to obtain transition layer powder; The mixing process parameters include: adding glycerin to the transition layer powder in a mixer and mixing for 1 hour, mixing evenly and then cold pressing; The molding parameters include: cold pressing the uniformly mixed transition layer powder into a blade-tooth-shaped compact; The sintering parameters include: placing the compact into a mold for hot pressing and sintering.

3. The method for optimizing welding parameters of a diamond saw blade laser welding process according to claim 2, characterized in that: In the sintering parameters, the green compact is placed in a mold for hot pressing and sintering, and then an arc grinding process is performed.

4. The method for optimizing welding parameters of a diamond saw blade laser welding process according to claim 2, characterized in that: The material composition parameters of the tool bit transition layer are 40% iron-nickel alloy powder, 10% copper powder, 15% carbonyl nickel powder, 20% cobalt powder, and 15% nickel powder; or, the material composition parameters of the tool bit transition layer are 45% iron-nickel alloy powder, 15% copper powder, 10% carbonyl nickel powder, 25% cobalt powder, and 5% nickel powder.

5. The method for optimizing welding parameters of a diamond saw blade laser welding process according to claim 1, characterized in that: The step of creating a three-dimensional welding model of a diamond saw blade specifically includes: Creating a finite element model of the substrate, performing meshing, and refining and adjusting the corresponding parts of the welding location; Creating a finite element model of the substrate welding layer based on the finite element model of the substrate, performing meshing, and performing refinement and adjustment on the welding point; Creating a finite element model of the tool head transition layer, performing meshing, and performing refinement and adjustment on the welding position; A finite element model of the tool head working layer is created based on the finite element model of the tool head transition layer, and detailed adjustments are made to the parts corresponding to the welding locations.

6. The method for optimizing welding parameters of a diamond saw blade laser welding process according to claim 1, characterized in that: The welding parameters include: welding speed, weld size, weld penetration, welding power, welding energy and welding energy utilization rate.

7. A diamond saw blade, characterized in that: include: A substrate and a cutter head connected to the substrate, wherein a substrate welding layer is arranged on the outer peripheral side of the substrate, and the cutter head comprises a cutter head transition layer and a cutter head working layer, wherein the substrate welding layer and the cutter head transition layer are laser welded by using the optimal welding parameters obtained by the method for optimizing the welding parameters of the laser welding process of a diamond saw blade according to any one of claims 1 to 6 above; The material composition of the tool head transition layer is: 40% to 60% iron-nickel alloy powder, 10% to 25% copper powder, 10% to 30% carbonyl nickel powder, 15% to 30% cobalt powder, and 5% to 15% nickel powder; the proportion of each component is by weight; the material of the base welding layer is 30CrMo; The average particle size D50 of the iron-nickel alloy powder is 3 microns to 8 microns; the average particle size D50 of the copper powder is 5 microns to 10 microns; the average particle size D50 of the carbonyl nickel powder is 2 microns to 4 microns; and the average particle size D50 of the cobalt powder is 3 microns to 6 microns.

8. The diamond saw blade according to claim 7, characterized in that: The material composition of the tool head transition layer is: 40% iron-nickel alloy powder, 10% copper powder, 15% carbonyl nickel powder, 20% cobalt powder, and 15% nickel powder; or, the material composition of the tool head transition layer is: 45% iron-nickel alloy powder, 15% copper powder, 10% carbonyl nickel powder, 25% cobalt powder, and 5% nickel powder.

Images