Diamond roller design method for composite grinding process grinding wheel dressing, diamond roller and grinding wheel dressing method
By designing a diamond roller that integrates line dressing and point dressing functions, the problem of needing two independent dressing devices in gear grinding processes was solved, thus simplifying the machine tool structure and improving processing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING UNIV
- Filing Date
- 2026-03-06
- Publication Date
- 2026-05-05
AI Technical Summary
The existing gear grinding process requires two independent dedicated dressing devices, which leads to crowded machine tool interior space, increased risk of mechanical interference, and low equipment investment efficiency.
A diamond roller was designed that integrates line trimming and point trimming functions into one unit through calculation of theoretical profile, thinning process and transition design, replacing the traditional two separate trimming devices.
It simplifies the machine tool structure, reduces costs, improves processing efficiency and precision, and reduces errors caused by replacing dressing devices.
Smart Images
Figure CN121973104A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gear grinding technology, specifically to a diamond roller design method for dressing grinding wheels in composite grinding processes, and a diamond roller and grinding wheel dressing method. Background Technology
[0002] To simultaneously achieve both efficiency and final precision in gear machining, the "rough-finish" composite grinding process has become an important development direction for high-end gear manufacturing. The typical path of this process is as follows: first, efficient rough grinding is performed using worm wheel grinding to quickly remove the tooth groove allowance; then, the tooth surface is finally finished using profile grinding to obtain extremely high tooth profile accuracy and surface quality.
[0003] Currently, worm wheel grinding and profile wheel grinding are two core processes in the precision grinding of gears. To achieve combined roughing and finishing and to adapt to gear machining with different tooth profile requirements, worm wheels and profile wheels are integrated into the same gear grinding machine. This composite synergistic grinding not only meets machining requirements but also improves gear production accuracy and efficiency.
[0004] However, in existing technologies, the dressing of these two types of grinding wheels relies on two completely different dressing tools and dressing movements: worm grinding wheels typically use expensive diamond dressing rollers with precise tooth profiles for generating dressing; while shaped grinding wheels mostly use single-crystal diamond pens, performing point-contact contour dressing via CNC trajectories. This dressing mode for worm and shaped grinding wheels has significant drawbacks: firstly, the limited internal space of machine tools means that installing multiple dressing mechanisms leads to a crowded layout, restricting overall structural design and increasing the risk of mechanical interference; secondly, each type of dedicated dresser needs to be designed and manufactured separately, resulting in high costs and relatively limited utilization, leading to low investment returns. Therefore, there is an urgent need for a diamond roller profile design method for composite grinding processes to support continuous, precise, and efficient "rough-finish" composite grinding processes. Summary of the Invention
[0005] The purpose of this invention is to provide a diamond roller design method, a diamond roller and a grinding wheel dressing method for composite grinding processes, so as to solve the technical problem that the existing gear grinding process requires two independent sets of dedicated dressing devices.
[0006] The technical solution adopted by this invention to solve its technical problem is: a diamond roller design method for dressing grinding wheels in composite grinding processes, comprising the following steps: S1. Obtain the tooth profile parameters of the gear to be processed, and calculate the original theoretical profile of the diamond roller based on the tooth profile parameters; S2. Thinning the original theoretical profile yields the parameters of the first profile segment, and the first profile segment is generated. S3. Calculate the parameters of the second profile segment based on the parameters of the first profile segment, calculate the parameters of the third profile segment based on the parameters of the second profile segment, generate the second profile segment based on the parameters of the second profile segment, and generate the third profile segment based on the parameters of the third profile segment. S4. Connect the first profile segment, the second profile segment, and the third profile segment in sequence along the radial direction of the diamond roller to obtain the composite profile of the diamond roller.
[0007] The significant advantages of this invention are as follows: Through a design process involving calculated theoretical profiles, thinning treatment, and the addition of transition elements, the continuity and functionality of the profile are ensured. The thinning design provides reasonable backlash for grinding, and the straight and arc segments at the tooth tip are specifically optimized for the tooth groove shape of the forming grinding wheel, guaranteeing the dressing quality of both types of grinding wheels. Furthermore, by designing the first and third profile segments on a single diamond roller, both line dressing (for worm wheels) and point dressing (for forming grinding wheels) functions are simultaneously achieved, replacing the traditional two separate dressing devices, significantly simplifying the machine tool structure and reducing costs.
[0008] Further, in step S1, the calculation steps for the original theoretical profile of the diamond roller include: A1. Construct the end face profile equation of the gear to be machined based on the tooth profile parameters, and obtain the tooth surface of the helical gear based on the end face profile equation. A2. Calculate the grinding wheel profile in a fixed coordinate system based on the tooth profile parameters of the gear to be processed; A3. The tooth surface of the grinding wheel is obtained by stretching the sand profile along its own helix angle; A4. Calculate the original theoretical profile of the diamond roller based on the tooth surface of the grinding wheel.
[0009] Further, in step S2, the original theoretical profile of the diamond roller is rotated by a preset angle around a preset point and translated to obtain the parameters of the first profile segment: In the formula, This is the first outline segment. The translation component is the original theoretical profile of the diamond roller after rotation. The rotation matrix of the original theoretical profile of the diamond roller. Based on the original theoretical outline of the diamond roller, The rotation angle of the original theoretical profile curve of the diamond roller around the endpoint of the original theoretical profile of the diamond roller.
[0010] Furthermore, the formula for calculating the maximum value of the original theoretical profile rotation angle of the diamond roller is: In the formula, This represents the maximum deflection angle. The slope of the tangent line at the starting point of the first profile segment curve; The formula for calculating the maximum range of translation of the original theoretical profile of the diamond roller is: In the formula, This represents the maximum value of the translation range. The endpoint of the first profile segment curve is at Coordinates on the axis.
[0011] Furthermore, in step S3, the second profile segment is a straight line segment, and the formula for calculating the coordinates of the second profile segment is: In the formula, For the second profile segment The coordinates of a point on the axis For the second profile segment The coordinates of a point on the axis For the end of the first profile segment at The coordinates of a point on the axis For the end of the first profile segment at The coordinates of a point on the axis.
[0012] Furthermore, in step S3, the third profile segment is an arc-shaped segment, and the calculation formula for the parameters of the third profile segment is: In the formula, For the third profile segment The coordinates of a point on the axis For the third profile segment The coordinates of a point on the axis The radius of the arc. For the second profile segment, near the end of the third profile segment Coordinates of the normal intersection point on the axis, For the second profile segment, near the end of the third profile segment The coordinates of the intersection point of the normal vectors on the axis.
[0013] A diamond roller for dressing grinding wheels in a composite grinding process includes a first profile segment, a second profile segment, and a third profile segment connected sequentially along the radial direction of the diamond roller surface. The first profile segment, the second profile segment, and the third profile segment are generated using the design method described above.
[0014] Furthermore, the first profile segment is used for line dressing of the worm wheel, the second profile segment is used to distinguish the first profile segment from the third profile segment, and the third profile segment is used for point dressing of the shaped grinding wheel.
[0015] This solution integrates the first and third profile sections into a single diamond roller, simultaneously achieving both line dressing (for worm wheels) and point dressing (for forming wheels), replacing the traditional two separate dressing devices. This significantly simplifies the machine tool structure and reduces costs.
[0016] A method for dressing grinding wheels in composite grinding processes, wherein the aforementioned diamond roller is used to dress the grinding wheel to be dressed.
[0017] Furthermore, the types of grinding wheels to be dressed include worm grinding wheels and profile grinding wheels, and the dressing modes for different types of grinding wheels to be dressed include: Worm grinding wheel dressing mode: Drive the worm grinding wheel and diamond roller to perform synchronous meshing motion according to a predetermined transmission ratio, and use the first profile section to perform line dressing on the worm grinding wheel; Forming wheel dressing mode: Control the forming wheel and diamond roller to perform CNC interpolation motion according to a predetermined trajectory, and use the third profile segment to perform point dressing on the tooth surface of the forming wheel in sequence.
[0018] The dressing method in this solution perfectly adapts to the composite grinding process flow of "worm wheel roughing - profile wheel finishing," eliminating the need to change the dresser, shortening auxiliary time, and improving machining cycle time and overall efficiency. It also reduces tool setting and positioning errors caused by changing the dressing device, which is beneficial for improving the final gear machining accuracy of the composite grinding process. Attached Figure Description
[0019] Figure 1 This is a flowchart of the diamond roller profile design method in an embodiment of the present invention; Figure 2 This is a schematic diagram of the diamond roller profile thinning process in an embodiment of the present invention; Figure 3 This is a schematic diagram of the composite profile of the diamond roller in an embodiment of the present invention; Figure 4 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 This is a schematic diagram of a diamond roller point dressing forming grinding wheel in an embodiment of the present invention; Figure 6 This is a schematic diagram of a diamond roller line dressing worm grinding wheel in an embodiment of the present invention; In the diagram: Diamond Roller 1, Diamond Roller Original Profile 101, First Profile Segment 102, Second Profile Segment 103, Third Profile Segment 104; Forming grinding wheel 2; Point adjustment trajectory 3. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.
[0021] See appendix Figure 1 The diamond roller design method shown here for dressing grinding wheels in composite grinding processes includes the following steps: S1. Obtain the tooth profile parameters of the gear to be processed. The gear to be processed is a gear to be processed using a composite grinding process, and the original theoretical profile 101 of the diamond roller is calculated based on the tooth profile parameters. The tooth profile parameters of the gear to be processed include the number of teeth, normal module, normal pressure angle, helix angle, tooth width, normal tooth addendum coefficient, and normal tooth dedendum coefficient. When obtaining these parameters, the design parameters of the gear to be processed can be transmitted to the computer platform used during the design process through device keyboard input, memory reading, network transmission, etc. Preferably, in this embodiment, the tooth profile parameters of the gear to be processed are obtained during the design stage and then transmitted to a computer platform equipped with MATLAB. Specifically, in this embodiment, the gear to be processed is a helical gear, and the tooth profile parameters of the helical gear are shown in Table 1. Table 1 Tooth profile parameters of the gear to be machined The calculation of the original theoretical profile 101 of the diamond roller includes the following steps: A1. Construct the end face modification tooth profile equation of the gear to be processed based on the tooth profile parameters, and obtain the tooth surface of the gear to be processed based on the end face modification tooth profile equation. Preferably, the gear to be processed in this embodiment is a helical gear.
[0022] The equation for the end face modified tooth profile is: In the formula, The equation for the modified tooth profile of the gear end face. The equation for the end face modification of the right tooth profile is given. The equation for the end face modification of the tooth profile on the left tooth surface is given. The radius of the base circle, It is the tooth groove half angle. The involute's development angle; By stretching the end-face profile equation along the helix angle of the helical gear, the tooth surface of the helical gear is obtained: In the formula, The equation for the tooth surface of a helical gear is... The equation for modifying the gear end face tooth profile is in Axial component, The equation for modifying the gear end face tooth profile is in Axial component, The equation for modifying the gear end face tooth profile is in Axial component, For rotation matrix, For the rotation matrix of the right-hand helical tooth surface, For the rotation matrix of the left-hand helical tooth surface, The angle after stretching the end face tooth profile. For the helical parameters of the helical gear, This represents the number of teeth on a helical gear. Let be the normal module of the helical gear. The helix angle of the helical gear.
[0023] A2. Based on the tooth profile parameters of the gear to be machined, calculate the profile of the worm grinding wheel in a fixed coordinate system. Specifically, the worm grinding wheel is used for grinding the gear to be machined. When calculating the worm grinding wheel profile, the number of worm grinding wheel heads and the pitch circle radius are determined based on the tooth profile parameters of the helical gear to be machined. The specific details of determining the number of worm grinding wheel heads and the pitch circle radius are existing technologies and will not be elaborated here. Based on the meshing relationship between the worm grinding wheel and the helical gear during the grinding process, the two-degree-of-freedom meshing relationship is obtained through a two-parameter envelope: In the formula, Let be the first cosine coefficient of the rotation angle of the helical gear. Let be the rotation angle of the helical gear. Let be the first sine coefficient of the rotation angle of the helical gear. Let be the second cosine coefficient of the rotation angle of the helical gear. This is the second sine coefficient of the rotation angle of the helical gear. The angle between the axes of the helical gear and the worm gear grinding wheel. This refers to the number of worm gear grinding wheel heads. This refers to the number of teeth on a helical gear. The center distance of the axis. The normal vector of the helical gear is in The coordinate components of the axis, The normal vector of the helical gear is in The coordinate components of the axis, The normal vector of the helical gear is in The coordinate components of the axis, The parameters are the helical parameters of the worm gear grinding wheel.
[0024] The formula for calculating the normal vector of the helical gear is: In the formula, The normal vector of the helical gear. Normal vector Axial component, Normal vector Axial component, Normal vector Directional components, To obtain the partial derivative operation.
[0025] The formula for calculating the helical parameters of a worm gear grinding wheel is: In the formula, The radius of the grinding wheel's pitch circle is denoted as . Let be the lead angle of the worm grinding wheel. During the meshing process of the worm and helical gear, their normal tooth pitches are equal. Therefore, the formula for calculating the lead angle of the worm grinding wheel is: In the formula, This is the lead angle of the worm gear grinding wheel.
[0026] Based on the two-parameter envelope, two sets of equations are obtained for the two-degree-of-freedom meshing relationship. In the two sets of equations... The angle after the end face tooth profile is stretched and The unknowns are eliminated by substituting them into the system of equations. And gradually change according to a certain step size. The value of can be used to obtain a series of points on the tooth surface of the worm grinding wheel, and after transformation, the profile of the worm grinding wheel in the fixed coordinate system can be obtained: In the formula, This is the profile of the worm gear grinding wheel in a fixed coordinate system. Let be the rotation matrix from the gear's fixed coordinate system to the worm gear's fixed coordinate system. These are a series of points on the tooth surface of the worm gear grinding wheel.
[0027] A3. Obtain the tooth surface of the gear to be machined based on the worm wheel profile; specifically, stretch the worm wheel profile curve along the helix angle of the worm wheel to obtain the tooth surface of the worm wheel. The formula for calculating the tooth surface of the worm wheel is: In the formula, For the tooth surface of the worm gear grinding wheel, Let be the rotation matrix of the helix angle of the worm grinding wheel. This is the rotation angle of the worm gear grinding wheel.
[0028] A4. The original theoretical profile 101 of the diamond roller 1 is calculated based on the intersection point of the profile of the diamond roller 1 with the tooth surface of the gear to be machined in the normal plane. Specifically, the calculation is performed based on the conjugate meshing of the profile of the diamond roller 1 with the theoretical profile of the worm grinding wheel in the normal plane. The specific calculation process of the original theoretical profile 101 of the diamond roller is existing technology and will not be elaborated here. The normal plane is defined as follows: In the formula, For the normal plane in The coordinates of the axis, For the normal plane in The coordinates of the axis.
[0029] S2. Based on the original theoretical profile 101 of the diamond roller, the parameters of the first profile segment are obtained through thinning, and the first profile segment is generated based on the parameters of the first profile segment; details are attached. Figure 2 As shown, the original theoretical profile of the diamond roller 1 is rotated by a preset angle around a preset point and translated, so that the overall tooth thickness of the original theoretical profile of the diamond roller 1 is uniformly reduced, resulting in the first profile segment 102 used for line dressing worm grinding wheels. The calculation formula for the parameters of the first profile segment is: In the formula, For the parameters of the first profile segment, The translation component after rotating the original theoretical profile 101 of the diamond roller. The rotation matrix of the original theoretical profile 101 of the diamond roller. The original theoretical profile of the diamond roller is 101. The rotation angle of the curve of the original theoretical profile 101 of the diamond roller around the end point of the original theoretical profile 101 of the diamond roller is determined by the slope of the starting point of the curve of the original theoretical profile 101 of the diamond roller.
[0030] When thinning the original theoretical profile 101 of the diamond roller, the rotation angle range and translation range of the original theoretical profile 101 of the diamond roller are determined by the angle between the tangent at the starting point of the original theoretical profile 101 of the diamond roller obtained by the worm wheel envelope and the horizontal line, as well as the coordinate of the ending point on the y-axis. The specific expression is as follows: In the formula, This represents the maximum deflection angle. The slope of the tangent line at the starting point of curve 102 in the first profile segment. This represents the maximum value of the translation range. The termination point of the first profile segment 102 curve is at Coordinates on the axis; where the deflection angle ranges from 0° to The translation range is 0 to .
[0031] S3. Calculate the parameters of the second profile segment based on the parameters of the first profile segment, and calculate the parameters of the third profile segment based on the parameters of the second profile segment; wherein the two ends of the second profile segment 103 are smoothly connected to the top of the first profile segment 102 and the third profile segment 104 respectively, and the calculation formula for the parameters of the second profile segment is: In the formula, For the second profile segment 103 in The coordinates of a point on the axis For the second profile segment 103 in The coordinates of a point on the axis The end of curve 102 in the first profile segment The coordinates of a point on the axis The end of curve 102 in the first profile segment The coordinates of a point on the axis.
[0032] The third profile segment 104 is a semi-circular arc segment designed at the end of the second profile segment 103 away from the first profile segment 102. The second profile segment 103 and the first profile segment 102 are symmetrically arranged at both ends of the third profile segment 104 to form the complete tooth tip of the diamond roller 1. The calculation formula for the parameters of the third profile segment is: In the formula, For the third profile segment 104 in The coordinates of a point on the axis For the third profile segment 104 in The coordinates of a point on the axis The radius of the arc. For the second profile segment 103, near the end of the third profile segment 104 Coordinates of the normal intersection point on the axis, For the second profile segment 103, near the end of the third profile segment 104 The coordinates of the intersection point of the normal vectors on the axis.
[0033] The second profile segment is generated based on the calculated parameters of the second profile segment, and the third profile segment is generated based on the parameters of the third profile segment. The generation of the second profile segment based on the parameters of the second profile segment and the generation of the third profile segment based on the parameters of the third profile segment can be synthesized by MATLAB software and displayed on the computer platform's display interface. The specific details of generating the profile segment shape based on the parameters using MATLAB software are existing technologies and will not be elaborated here.
[0034] S4. Based on the combination of the first profile segment 102, the second profile segment 103, and the third profile segment 104, the composite profile of the diamond roller 1 is obtained, as shown in the attached figure. Figure 3 As shown. When combining the first profile segment 102, the second profile segment 103, and the third profile segment 104 to obtain the composite profile of the diamond roller 1, the synthesis operation can be performed through the MATLAB software interface. The specific details of the synthesis operation through the MATLAB software interface are existing technology and will not be elaborated here.
[0035] This invention also aims to provide a diamond roller for dressing grinding wheels in composite grinding processes, as shown in the attached figure. Figure 3 As shown, the design includes a first profile segment 102, a second profile segment 103, and a third profile segment 104 connected radially along the surface of the diamond roller 1. The first profile segment 102, the second profile segment 103, and the third profile segment 104 are designed using the above-described design method. Specifically, the first profile segment 102, the second profile segment 103, and the third profile segment 104 are all extension directions of the two sides of the diamond roller 1 along their own radial direction in different regions. The first profile segment 102 is connected to both ends of the third profile segment 104 through the second profile segment 103. That is, the second profile segment 103 and the first profile segment 102 are provided on both sides of the surface of the diamond roller 1.
[0036] The first profile segment 102 is used for line dressing of the worm grinding wheel. The spatial coordinates and deflection angle of the diamond roller 1 relative to the worm grinding wheel are determined by the radius of the diamond roller 1, the design parameters of the worm grinding wheel, and the above calculations. Based on the normal theoretical profile of the worm grinding wheel, it is used to perform precise line dressing of the worm grinding wheel through continuous generating motion. After rotating a certain angle around the end of the normal theoretical profile, and then translating, a diamond roller 1 profile with a tooth thickness thinner than the original theoretical profile is obtained. The first profile segment is mainly used for line dressing of the worm grinding wheel with reserved backlash.
[0037] The second profile segment 103 is used to distinguish the first profile segment and the third profile segment 104, and does not participate in the grinding process; that is, the second profile segment 103 is a straight transition segment from the end of the first profile segment 102 away from the axis of the diamond roller 1. The second profile segment 103 is mainly used to distinguish the first profile segment 102 and the third profile segment 104 to prevent interference during the processing and affect the dressing surface of the grinding wheel.
[0038] The third profile segment 104 is used for point dressing of the forming grinding wheel 2; that is, the third profile segment 104 is the semi-circular arc segment of the second profile segment 103 located at the tooth tip of the diamond roller 1 away from the first profile segment 102, that is, the third profile segment 104 is the arc end of the edge of the diamond roller 1. The third profile segment 104 is used to refine and shape the tooth groove profile of the forming grinding wheel 2 through point contact, specifically the third profile segment 104 is used to dress the arc portion of the tooth root of the forming grinding wheel 2.
[0039] like Figure 5 As shown, when the forming grinding wheel 2 needs to be dressed, the diamond roller 1 remains fixed in space and rotates uniformly around its own axis. Based on the target profile of the forming grinding wheel 2, the normal vectors of each point on the tooth surface are calculated, and the corresponding points are determined at the distance from each normal vector direction, thus constructing a new sequence of profile points. The machine tool CNC system controls the forming grinding wheel 2 to perform precise CNC interpolation motion according to this point sequence. During this process, the third profile segment 104 of the diamond roller 1 sequentially forms point contact with the tooth flank and tooth root regions of the forming grinding wheel 2, thus dressing the complete target tooth profile required by the forming grinding wheel 2 in one go through point dressing. The point dressing trajectory 3 of the diamond roller 1 on the forming grinding wheel 2 is shown in the attached figure. Figure 5 As shown.
[0040] This invention also aims to provide a method for dressing grinding wheels in composite grinding processes. Depending on the type of grinding wheel to be dressed, the diamond roller 1 described above is used to select the corresponding dressing mode to dress the grinding wheel. The types of grinding wheels to be dressed include worm grinding wheels and profiled grinding wheels 2. Dressing modes for different grinding wheel types include: Worm Grinding Wheel Dressing Mode: The worm grinding wheel and diamond roller 1 are driven to mesh synchronously at a predetermined transmission ratio, and the first profile section 102 is used to perform line dressing on the worm grinding wheel; as shown in the attached diagram. Figure 6 As shown, the spatial coordinates and deflection angle of the diamond roller 1 relative to the worm grinding wheel are obtained and determined by the radius of the diamond roller 1, the design parameters of the worm grinding wheel, and the above calculations. The specific calculation of the spatial coordinates and deflection angle of the diamond roller 1 relative to the worm grinding wheel is existing technology and will not be elaborated here.
[0041] Forming wheel dressing mode: The forming wheel 2 and the diamond roller 1 are controlled to perform CNC interpolation motion according to a predetermined trajectory, and the tooth surface of the forming wheel 2 is dressed sequentially using the third profile segment 104. The diamond roller 1 remains fixed in space and rotates uniformly around its own axis. Based on the target profile of the forming wheel 2, the normal vector of each point on the tooth surface is calculated, and the corresponding point is determined at the distance in each normal vector direction, thereby constructing a new profile point sequence. The machine tool CNC system controls the forming wheel 2 to perform precise CNC interpolation motion according to this point sequence.
[0042] Compared with the prior art, the diamond roller for dressing worm grinding wheels and forming grinding wheels designed in this invention has the following advantages: 1. A single diamond roller integrates both line dressing (for worm wheels) and spot dressing (for forming wheels), replacing two separate dressing devices, significantly simplifying the machine tool structure and reducing costs.
[0043] 2. Perfectly adapts to the composite grinding process flow of "worm wheel roughing - forming wheel finishing", eliminating the need to change the dresser, shortening auxiliary time, and improving processing cycle and overall efficiency.
[0044] 3. The design process of "theoretical profile → rotational thinning → adding transitions and arcs" ensures the continuity and functionality of the profile. The thinning design provides reasonable backlash for grinding, and the straight and arc segments at the tooth tip are specifically optimized for the tooth groove shape of the forming grinding wheel 2, ensuring the dressing quality of both grinding wheels.
[0045] 4. It reduces tool setting and positioning errors caused by changing dressing devices, which helps improve the final gear machining accuracy of the composite grinding process.
[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention should be included within the protection scope of the present invention.
Claims
1. A design method for a diamond roller for dressing grinding wheels in composite grinding processes, characterized in that, Includes the following steps: S1. Obtain the tooth profile parameters of the gear to be processed, and calculate the original theoretical profile of the diamond roller based on the tooth profile parameters; S2. Thinning the original theoretical profile yields the parameters of the first profile segment, and the first profile segment is generated. S3. Calculate the parameters of the second profile segment based on the parameters of the first profile segment, and calculate the parameters of the third profile segment based on the parameters of the second profile segment; and generate the second profile segment based on the parameters of the second profile segment, and generate the third profile segment based on the parameters of the third profile segment; S4. Connect the first profile segment, the second profile segment, and the third profile segment in sequence along the radial direction of the diamond roller to obtain the composite profile of the diamond roller.
2. The diamond roller design method according to claim 1, characterized in that, In step S1, the calculation steps for the original theoretical profile of the diamond roller include: A1. Construct the end face profile equation of the gear to be machined based on the tooth profile parameters, and obtain the tooth surface of the helical gear based on the end face profile equation. A2. Calculate the grinding wheel profile in a fixed coordinate system based on the tooth profile parameters of the gear to be processed; A3. The tooth surface of the grinding wheel is obtained by stretching the sand profile along its own helix angle; A4. Calculate the original theoretical profile of the diamond roller based on the tooth surface of the grinding wheel.
3. The diamond roller design method according to claim 1, characterized in that, In step S2, the original theoretical profile of the diamond roller is rotated around a preset point by a preset angle and translated to obtain the parameters of the first profile segment: In the formula, This is the first outline segment. The translation component is the original theoretical profile of the diamond roller after rotation. The rotation matrix of the original theoretical profile of the diamond roller. Based on the original theoretical outline of the diamond roller, The rotation angle of the original theoretical profile curve of the diamond roller around the endpoint of the original theoretical profile of the diamond roller.
4. The diamond roller design method according to claim 3, characterized in that, The formula for calculating the maximum value of the original theoretical profile rotation angle of the diamond roller is: In the formula, This represents the maximum deflection angle. The slope of the tangent line at the starting point of the first profile segment curve; The formula for calculating the maximum range of translation of the original theoretical profile of the diamond roller is: In the formula, This represents the maximum value of the translation range. The endpoint of the first profile segment curve is at Coordinates on the axis.
5. The diamond roller design method according to claim 1, characterized in that, In step S3, the second profile segment is a straight line segment, and the formula for calculating the coordinates of the second profile segment is: In the formula, For the second profile segment The coordinates of a point on the axis For the second profile segment The coordinates of a point on the axis For the end of the first profile segment at The coordinates of a point on the axis For the end of the first profile segment at The coordinates of a point on the axis.
6. The diamond roller design method according to claim 1, characterized in that, In step S3, the third profile segment is an arc segment, and the calculation formula for the parameters of the third profile segment is: In the formula, For the third profile segment The coordinates of a point on the axis For the third profile segment The coordinates of a point on the axis The radius of the arc. For the second profile segment, near the end of the third profile segment Coordinates of the normal intersection point on the axis, For the second profile segment, near the end of the third profile segment The coordinates of the intersection point of the normal vectors on the axis.
7. A diamond roller for dressing grinding wheels in composite grinding processes, characterized in that, The device includes a first profile segment, a second profile segment, and a third profile segment connected radially along the surface of the diamond roller, wherein the first profile segment, the second profile segment, and the third profile segment are generated using the design method described in any one of claims 1-6.
8. The diamond roller according to claim 7, characterized in that, The first profile segment is used for line dressing of the worm wheel, the second profile segment is used to distinguish the first profile segment from the third profile segment, and the third profile segment is used for point dressing of the shaped grinding wheel.
9. A method for dressing grinding wheels in composite grinding processes, characterized in that, The diamond roller as described in any one of claims 7-8 is used to dress the dressing wheel.
10. The trimming method according to claim 9, characterized in that, The types of grinding wheels to be dressed include worm grinding wheels and profile grinding wheels. Dressing modes for different types of grinding wheels to be dressed include: Worm grinding wheel dressing mode: Drive the worm grinding wheel and diamond roller to perform synchronous meshing motion according to a predetermined transmission ratio, and use the first profile section to perform line dressing on the worm grinding wheel; Forming wheel dressing mode: Control the forming wheel and diamond roller to perform CNC interpolation motion according to a predetermined trajectory, and use the third profile segment to perform point dressing on the tooth surface of the forming wheel in sequence.