Grinding test piece for grinding wheel test grinding measurement and working method

Abstract

This invention relates to the field of trial grinding technology for multi-axis grinding wheels, and discloses a test grinding piece and working method for test grinding of grinding wheels, including a clamping rod, a positioning base, and a bar stock; the clamping rod is mounted on a CNC grinding machine, and the positioning base is located at one end of the clamping rod; the bar stock includes at least one piece, which is mounted on the positioning base and forms a certain angle with the surface of the positioning base; the bar stock includes at least one end face to be ground. This invention enables the test grinding piece to meet the test grinding requirements at various test grinding points without repeatedly changing the test grinding piece and test grinding process, improving the versatility of the test grinding piece and the test grinding process, while reducing grinding volume, increasing material utilization, reducing production costs, avoiding deformation of the grinding wheel, and ensuring grinding accuracy.

Description

Technical Field

[0001] This invention relates to the field of trial grinding technology for multi-axis grinding wheels, specifically to test grinding pieces and working methods used for test grinding measurements of grinding wheels. Background Technology

[0002] Grinding wheels are the most important type of abrasive tool in grinding processes. To ensure the grinding accuracy of grinding wheels, trial grinding is required before actual grinding to obtain process parameters such as the wheel's shape. The trial grinding process uses a reusable workpiece and grinds it with a grinding wheel at a fixed grinding depth. The workpiece used in the trial grinding process is called the trial grinding piece.

[0003] Currently, there are two main types of test grinding pieces used on grinding machines. One type is a Φ6mm alloy cylindrical bar with two right-angled grooves, which are mirror-symmetrical about the axis of the cylindrical bar. The edges formed by the right-angled grooves on the circumference of the cylindrical bar are ground. Then, the cylindrical bar is rotated 180° axially, and the grinding process is repeated on the other edge. The difference between the actual and expected grinding amount is measured, and the machined surface shape of the grinding wheel is calculated. The number of times the cylindrical bar can be used is determined by its length. After each measurement, an unworn section is fed axially for a new measurement, until the cylindrical bar is exhausted. This results in rapid consumption of the cylindrical bar, low material utilization, and inconvenience for measurement.

[0004] Another method uses a thin disc. The circumference of the disc is ground to a fixed depth, pointing towards the center. The disc is then rotated 180° and ground again. The results of the two grinding operations are measured using calipers, and the cross-sectional shape of the grinding wheel is deduced from this. After completing one trial grinding measurement, the disc can be rotated to a new, unworn arc segment for a new grinding and measurement, until the arc segment is exhausted. Although this type of test grinding component improves material utilization compared to a cylindrical bar, because the specified grinding length is towards the center, even with a fixed grinding length, the grinding amount increases with the length of the disc's dicing. This increased grinding amount easily causes wear on the grinding wheel, leading to deformation of the machined surface during testing and affecting grinding accuracy. Furthermore, the disc component needs to be custom-made, increasing production costs.

[0005] Meanwhile, existing trial grinding processes require different test pieces for different scenarios. Furthermore, because these test pieces undergo continuous grinding, their structural characteristics vary, necessitating the design of different trial grinding process steps based on their specific features. This leads to inconsistencies in the process before and after the trial grinding, resulting in complex and unstable operations. Moreover, with increasing demands for part precision, the requirements for testing grinding points on various surfaces of the grinding wheel are becoming more numerous. Existing test pieces and processes cannot meet the testing needs of all surfaces, making it difficult to guarantee the accuracy of trial grinding measurements. Summary of the Invention

[0006] The present invention aims to provide a test grinding piece and working method for grinding wheel test measurement, so as to solve the problems of low material utilization rate and lack of universality of current test grinding pieces, resulting in inaccurate test grinding measurement, cumbersome and non-universal test grinding process, and high production cost.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a test piece for grinding wheel test measurement includes a clamping rod, a positioning base, and a bar stock; the clamping rod is mounted on a CNC grinding machine, and the positioning base is located at one end of the clamping rod; the bar stock includes at least one bar stock, which is mounted on the positioning base and forms a certain angle with the surface of the positioning base; the bar stock includes at least one end face to be ground.

[0008] The principles and advantages of this scheme are:

[0009] While trial grinding is an essential testing process in grinding, used to obtain real-time, accurate data on the grinding wheel to ensure grinding precision, the grinding process itself is short and primarily relies on consumable grinding. Measurements are achieved by measuring the amount of material removed from the test piece. Therefore, the selection of test pieces is often based on the concept of consumables, with little regard for their utilization rate or the investment of time and resources in their design and development.

[0010] However, in actual production, due to large production volumes and the ever-increasing demand for product precision, the number of grinding points is increasing, leading to a gradual increase in the time and material consumption of the trial grinding process. Although each trial grinding session is short, differences in the structure of the machined parts and the installation position of the grinding wheel can cause some surfaces of the grinding wheel to be obstructed, or the test piece to be unable to effectively contact it. This results in some grinding points on the grinding wheel being untestable, leading to insufficient trial grinding accuracy and high material consumption. Because the machining surfaces of grinding wheels are mostly circular, mirror symmetry is often used for untestable grinding points, assuming that the results of grinding on symmetrical surfaces are equivalent, thus ignoring some difficult-to-test grinding points. Furthermore, we have noticed that sometimes the accuracy of grinding wheel trial grinding results is insufficient not because of inaccurate testing, but because the structure of the selected test piece increases the amount of grinding during the trial grinding process, causing deformation of the grinding wheel and thus affecting the testing accuracy.

[0011] This application, abandoning the technical bias that test grinding parts are merely consumables requiring little design, develops them as a process device based on their structural design. It considers aspects such as versatility, applicability, rationality, stability, and cost, resulting in a universally applicable, more stable, and lower-cost test grinding part that improves grinding accuracy and meets the requirements of various grinding points. This application uses the end face of the bar stock as the grinding end face, reducing its volume and allowing for flexible adjustment of the bar stock position according to the grinding point location. This ensures the grinding end face is not limited by the grinding wheel position and effectively contacts the grinding point. The bar stock can be adjusted using a clamping rod, making operation more convenient and faster, eliminating the need for repeated test grinding part replacements, and improving grinding process efficiency. Furthermore, the clamping rod and positioning base fix the bar stock, improving its stability during grinding, ensuring it meets the overall grinding force, preventing positional shifts, and guaranteeing grinding accuracy. Using bar stock allows for more precise setting of the grinding amount and facilitates measurement. Trial grinding can be completed with less grinding, improving the utilization rate of bar stock, reducing production costs, reducing wear on the grinding wheel, preventing grinding wheel deformation during trial grinding, and improving the accuracy of trial grinding measurements.

[0012] Furthermore, the bar stock is an elongated bar stock; the ratio of the outer diameter of the cross-section of the bar stock to the diameter of the grinding wheel is less than 0.1; the ratio of the length of the bar stock to the outer diameter of the cross-section is greater than 3.

[0013] Beneficial effects: The slender bar structure facilitates bar replacement and installation, reduces bar volume, allows for more flexible bar position adjustment, meets the grinding requirements of various test points, improves the versatility of test pieces, and makes measurement easier and more accurate. Furthermore, as the bar is a consumable, grinding tests can be performed with less grinding material, improving bar utilization and reducing consumable costs.

[0014] Furthermore, the positioning base has a regular hexagonal structure; the bar stock is positioned in multiple directions of the positioning base.

[0015] Beneficial effects: The positioning base is designed as a regular hexagonal structure, which facilitates the positioning and setting of the bar stock, improves the stability of the bar stock, and can also quickly obtain the specific position information of the end face of the bar stock to be ground, simplifying the operation and improving applicability.

[0016] Furthermore, the bar stock includes two end faces to be ground, located at both ends of the bar stock respectively; the end faces to be ground are perpendicular to the axial direction of the bar stock.

[0017] Beneficial effects: By using both ends of the bar stock as the end faces to be ground, the appropriate end face to be ground can be flexibly selected according to the position and direction of the test grinding point, without being limited by the position, direction of the grinding wheel or the entire structure of the grinding machine. This ensures that the end face to be ground is in accurate contact with the test grinding point, improving the versatility and effectiveness of the test grinding piece. Moreover, the end faces to be ground at both ends do not affect each other, making grinding more convenient and increasing the utilization rate.

[0018] Furthermore, the bar stock axis is perpendicular to the rotation axis of the CNC grinding machine or parallel to the translation axis of the CNC grinding machine.

[0019] Beneficial effects: It makes it easier to directly adjust the position and orientation of the bar stock through the CNC grinding machine, and it also allows for the accurate acquisition of the bar stock's coordinate data based on the coordinate data of the CNC grinding machine, thereby enabling the formulation of a precise trial grinding path.

[0020] Furthermore, the bar stock includes one piece, which forms a 45° angle with the surface of the positioning base. Alternatively, two bars may be arranged perpendicularly intersecting each other on the positioning base.

[0021] Beneficial effects: The quantity of bar stock can be flexibly set according to actual grinding requirements, and the bar stock can be arranged at a fixed angle, which can effectively avoid collisions or obstructions during the grinding process. At the same time, the movement of the grinding machine can be reduced according to the arrangement direction, thereby improving the grinding efficiency.

[0022] The present invention also provides a working method for a test grinding piece used in grinding wheel test measurement, which is applied to the test grinding piece used in the above-mentioned grinding wheel test measurement, and includes the following steps:

[0023] Step 1: Adjust the position of the test grinding bar according to the position of the grinding wheel test grinding point, so that the end face to be ground of one end of the bar corresponds to the test grinding point;

[0024] Step 2: Set the test grinding parameters so that the grinding wheel contacts the end face of the bar stock to be ground according to the set test grinding path;

[0025] Step 3: Take out the test piece and measure the actual grinding amount on the end face to be ground in order to obtain the process parameters of the grinding wheel.

[0026] Furthermore, the test grinding parameters include grinding amount, coordinate parameters, and test grinding path.

[0027] Furthermore, in step one, the quantity of test grinding bar stock used is selected based on the number and location of the test grinding points.

[0028] Beneficial effects: The specific location of the test piece can be selected based on the location of the test grinding points, thus enabling the test piece to meet the testing requirements of multiple test grinding points. Designing the test grinding path also improves the effectiveness of the test grinding, avoiding collisions or obstructions during the process that could affect the test results. Simultaneously, an optimal test grinding path can be designed, reducing test grinding time, shortening the test grinding process, and further improving test grinding efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the test piece according to Embodiment 1 of the present invention.

[0030] Figure 2 This is a schematic diagram of the grinding point of the grinding wheel cross section in Embodiment 1 of the present invention.

[0031] Figure 3 This is a structural schematic diagram of the test piece in application scenario one of Embodiment 1 of the present invention.

[0032] Figure 4 This is a schematic diagram of the test piece in state one of Embodiment 2 of the present invention.

[0033] Figure 5 This is a schematic diagram of the second state of the test piece in Embodiment 2 of the present invention.

[0034] Figure 6 This is a schematic diagram of the three-state structure of the test piece in Embodiment 2 of the present invention.

[0035] Figure 7 This is a schematic diagram of the application structure in the trial grinding scenario of Embodiment 3 of the present invention.

[0036] Figure 8 This is a schematic diagram of the application structure in the second trial grinding scenario of Embodiment 3 of the present invention.

[0037] Figure 9 This is a schematic diagram of the test piece structure in Embodiment 4 of the present invention.

[0038] Figure 10 This is a schematic diagram of the application structure in the trial grinding scenario of Embodiment 4 of the present invention.

[0039] Figure 11 This is a schematic diagram of the application structure in the second trial grinding scenario of Embodiment 4 of the present invention. Detailed Implementation

[0040] The following detailed description illustrates the specific implementation method:

[0041] The reference numerals in the accompanying drawings include: clamping rod 1, machine tool base 2, positioning base 3, bar stock 4, grinding wheel spindle 5, grinding wheel 6, screw 8, and second bar stock 7.

[0042] Example 1

[0043] This implementation example is attached. Figure 1 As shown, the test grinding pieces and working method used for grinding wheel test measurement are designed to solve the problems of existing test grinding pieces being non-universal, having low material utilization, failing to meet the test grinding requirements of each test grinding point, and having cumbersome test grinding processes, large and unstable single test grinding volume, and low test accuracy.

[0044] Specifically, it is a test grinding piece for measuring grinding wheel performance, including a cylindrical clamping rod 1, which can be directly mounted on the machine tool table 2 of a CNC grinding machine. A hexagonal positioning base 3 is welded to the front end of the clamping rod 1, the positioning base 3 being 15mm long, 15mm wide, and 15mm high. The positioning base 3 has inclined through holes passing through its β and γ surfaces, and a threaded hole on its δ surface.

[0045] A bar stock 4 is installed in the inclined through hole of the positioning base 3, allowing the bar stock 4 to pass through the positioning base 3. Viewed from the δ plane, the bar stock 4 forms a 45° counterclockwise angle with the β plane, and is fixed in place by screws 8 through threaded holes. The clamping rod 1 and the positioning base 3 utilize the test grinding piece as a universal test grinding tool, thus standardizing consumable tools and improving the stability of the bar stock 4 during the test grinding process, preventing it from shifting during grinding. The clamping member 1 also allows for flexible control of the bar stock 4's position, meeting various position adjustment needs, such as the bar stock 4's axis being perpendicular to the CNC grinding machine's rotary axis or parallel to the CNC grinding machine's translational axis. This facilitates positioning and adjustment settings of the bar stock 4 via the positioning base 3.

[0046] Specifically, the bar stock 4 has a slender structure, and can adopt various slender structures such as prism, square, and circle to improve the stability of the bar stock 4 fixed in the positioning base 3. When a circle is selected as the bar stock 4, a positioning hole or anti-slip layer can be provided in the middle of the bar stock 4 to improve its stability and ensure it can support the grinding force. Both ends of the bar stock 4 can be used as the end faces to be ground, perpendicular to the bar stock axis. During trial grinding, a suitable end face can be selected as the end face to be ground. The cross-sectional shape of the bar stock 4 can also have various forms, with the ratio of the outer diameter of its cross-section to the diameter of the grinding wheel being less than 0.1; the ratio of the length of the bar stock 4 to the outer diameter of its cross-section being greater than 3. In this embodiment, a cylindrical section cemented carbide bar stock with a diameter of 1mm is used, suitable for grinding. Furthermore, the axial direction of the bar stock 4 is defined as the direction along the length of the bar stock pointing towards the end face to be ground; therefore, the grinding amount is the length along the opposite direction of the bar stock axis.

[0047] To improve the stability of the bar stock 4 during the grinding process, limiting rings can be set on both sides of the inclined through hole of the positioning base 3 to limit and fix the installed bar stock 4, prevent the bar stock 4 from shifting, and ensure grinding accuracy.

[0048] Meanwhile, this embodiment also provides a method for testing a grinding piece for grinding wheel trial measurement. By driving the grinding wheel and the grinding piece to generate relative motion on a CNC grinding machine, the testing point moves along a set testing path, allowing the grinding piece to be tested at the set grinding wheel testing point. The end face position of the grinding piece is obtained before and after the test grinding to obtain the grinding amount. The grinding amount is compared and analyzed with the set grinding length to obtain the process parameters of the grinding wheel testing point. Specifically, the method includes the following steps:

[0049] S1. Adjust the position of the test piece according to the test grinding point so that the end face to be ground on one end of the bar corresponds to the test grinding point. (See attached image) Figure 2 The schematic diagram of the grinding points on the grinding wheel cross-section is shown. Based on the grinding wheel structure, the surface formed by rotating the AH line segment around the β axis is defined as the grinding surface of the grinding wheel. Considering the grinding process, each grinding segment is required for the grinding surface. The middle position of each small grinding segment is selected as the grinding point of each segment, thus defining points A, B, C, D, E, F, G, and H as multiple grinding points on the grinding wheel. The test grinding point is any point among these grinding points. By accurately dividing the grinding points, both the comprehensiveness and effectiveness of the test grinding are ensured, and the position of the test grinding point can be accurately determined, ensuring the test grinding effect. In this embodiment, the process parameters for obtaining the position information of point C on the grinding wheel cross-section profile are used as an example, and the position corresponding to point C is used as the test grinding point for explanation.

[0050] Based on the designated test grinding point C, the test pieces are prepared according to the attached... Figure 3 As shown, the clamping rod 1 is mounted on the machine tool table 2 of the CNC grinding machine. In this embodiment, the CNC grinding machine is a three-translational grinding machine, that is, the grinding machine has translational axes that translate along the X-axis, Y-axis, and Z-axis. The CNC grinding machine is adjusted so that the end face of the test piece 4 to be ground corresponds to point C, so that it can contact point C. The grinding wheel includes a grinding wheel spindle 5 and a grinding wheel 6, and the grinding wheel spindle 5 drives the grinding wheel 6 to rotate.

[0051] S2. After installation, set the trial grinding parameters. These parameters include grinding amount, coordinate parameters, and trial grinding path. The coordinate parameters include absolute coordinates, grinding wheel coordinates, and coordinates of the point to be ground. The grinding wheel shape parameters are input into the CNC grinding machine's machining conditions, including the wheel's fillet radius, diameter, and cantilever beam length. The coordinates of the end face of the workpiece to be ground are obtained using a grinding machine probe and used as the coordinates of the point to be ground. This provides precise path coordinate control for the trial grinding motion. In this embodiment, the grinding amount is set to 0.01mm, which meets the grinding requirements while reducing the grinding amount and improving the utilization rate of the workpiece 4.

[0052] Based on the grinding wheel profile point C, the grinding path is determined to be a straight line. This allows for the planning of the optimal and shortest grinding path, reducing grinding time and ensuring precise contact between the workpiece's end face and the grinding point. (See attached image.) Figure 3 As shown in the diagram, the directed straight arrow from b to c indicates the path. Because this straight path is in the same plane as the grinding wheel axis, it is convenient to set the path perpendicular to the normal of the grinding wheel test point C within the CNC grinding machine. Point C is the grinding wheel test point assumed under ideal conditions during the test grinding process. The microscopic curved surface structure of the grinding wheel at point C may be uneven. Using the test grinding path in this embodiment, it is always possible to ensure that the convex part at point C is the grinding wheel test point, thus ensuring that the end face of the bar to be ground along the effective test grinding path may come into contact with the grinding wheel test point, and not with other parts besides the test point.

[0053] In this embodiment, safety positions a and b are also provided for the grinding path. Based on the start and end points of the designed shortest effective grinding path, a safety point is designated as the starting point along the path from the grinding wheel to the start point or from the end point back to the initial position, serving as the safety position. During grinding, the grinding wheel can move rapidly from the initial position of the CNC grinding machine to safety position a, and then slowly move from safety position a to the grinding start position b; or slowly move from the grinding end position c to safety position d, and then rapidly move from safety position d to the initial position of the CNC grinding machine. This effectively speeds up the process and improves process safety. Furthermore, depending on the trial grinding scenario, the safety position can be flexibly set according to the actual trial grinding path.

[0054] S3, Trial Grinding Stage. Adjust the axis 4 of the test grinding piece to be in the XY plane and at a 45° counterclockwise angle to the X-axis, making it perpendicular to the determined bc machining path, so that grinding can be easily achieved in a straight machining path using the grinding wheel profile point C.

[0055] The CNC grinding machine drives the grinding wheel to feed the grinding amount at position b along the direction from a to b. Since the axis of the bar to be ground is perpendicular to the straight path, the direction from a to b is the grinding direction. Then the grinding wheel grinds the four end faces of the bar along the machining path from b to c, and reaches position c. Then it slowly returns to the safe position d, and from d it returns to the initial position, completing the trial grinding process.

[0056] During the trial grinding phase, the effective trial grinding path is from b to c. Within the effective trial grinding path, the technician intends to make contact between the end face of the bar to be ground and the grinding wheel at point C, without contacting any other part besides point C. If point C grinds to the end face of the bar, then point C has made actual contact with the end face; otherwise, there is no actual contact.

[0057] S4, Testing Phase. After the trial grinding is completed, the end face of the bar stock will form a complete plane that can be detected by the machine tool. The normal of this plane is perpendicular to the grinding path. The test piece is removed from the grinding machine, and the end face is detected to determine whether the end face has undergone a positional change of 0.01mm. Then, the actual profile of the grinding wheel at point C is calculated in reverse, thereby obtaining the process parameters of the grinding wheel at point C, so as to achieve the effect of accurate trial grinding measurement.

[0058] In this embodiment, the clamping rod 1 and the positioning base 3 are used to fix the bar stock 4, ensuring its stability and uniform force distribution. The compact structure facilitates assembly and allows for diverse bar stock configurations, making it suitable for trial grinding at multiple locations. This allows the test piece to be used as a universal test grinding tool, thus improving grinding efficiency. Using the slender end face of the bar stock 4 as the grinding end face facilitates flexible adjustment of its position, unrestricted by the grinding wheel structure or test grinding point location. It can be adjusted to multiple directions and positions, offering greater flexibility and meeting the testing needs of multiple test grinding points without requiring identical testing methods, thus improving the versatility and accuracy of the test piece. Furthermore, the slender structure of the bar stock 4 facilitates standardized measurement, and setting the grinding amount to 0.01mm for test grinding achieves the desired measurement effect while reducing the grinding amount, minimizing wear on the grinding wheel, preventing wheel deformation, and improving grinding accuracy. Simultaneously, the bar stock 4 has higher material utilization and lower production costs.

[0059] By setting a reasonable test grinding path based on the location of the test grinding point, optimizing the grinding path, reducing the grinding time, improving the test grinding efficiency, avoiding contact or obstruction between the bar stock 4 and other parts of the grinding wheel 6, ensuring the effectiveness and accuracy of the test grinding, and improving the test grinding precision.

[0060] Example 2

[0061] Unlike Embodiment 1, in this embodiment, the bar 4 displaying the test piece can be set with one or more bars in different directions and angles according to the needs of the test grinding measurement process. (See attached...) Figure 4 The test piece shown includes four bars 4, all fixed with screws. The four bars 4 are distributed on a plane parallel to the rotation and translation axes (X and Y) of the grinding wheel. Each bar 4 provides two end faces for grinding. The projection angles of the bars 4 onto the parallel plane are distributed at 45°, facilitating adjustment and configuration to meet testing requirements at various angles. In this embodiment, the bars 4 can be clamped at once, enabling multiple test grinding measurements.

[0062] In addition, this embodiment also provides another distribution method for multiple bars 4, as shown in the attached figure. Figure 5 As shown, all the bars 4 are distributed on a plane parallel to the YZ axis of the CNC grinding machine, and each bar provides two end faces for grinding by the grinding wheel.

[0063] For example, see appendix. Figure 6 As shown, all the bar stock 4 are not distributed in a plane parallel to the grinding wheel's rotation axis and / or translation axis. Depending on the distribution position of the bar stock 4, screws 8 are used to fix the bar stock 4 on different surfaces of the positioning base 3. This installation method can be used on CNC grinding machines with specific structures.

[0064] Example 3

[0065] Unlike Embodiment 1, this embodiment demonstrates an effective grinding path that is a straight line perpendicular to the grinding wheel's rotation axis within the cutting plane. (See attached...) Figure 7 As shown, the operator intends to perform a test grinding measurement at test grinding point A on the grinding wheel. However, due to localized wear on the grinding wheel from previous use, the actual test grinding point is at point B, a concave area. In this case, if an effective grinding path is designed in the XY plane, the convex points C and D near test grinding point A will be used for grinding. Using... Figure 7 The effective grinding path in the XZ plane shown in the AA view can achieve the effect of grinding at point B.

[0066] Meanwhile, if the grinding wheel's movement is obstructed within the XZ plane, or if collisions may occur, an effective grinding path can be used, which is a curve perpendicular to the grinding wheel's rotation axis within the tangential plane, as shown in the attached figure. Figure 8 The effective grinding path shown in the curve was tested and measured to avoid collision problems.

[0067] Example 4

[0068] Unlike Embodiment 1, this embodiment demonstrates how, when the trial grinding process is performed at a relatively large angle relative to the machine tool, the two bars 4 of the trial grinding piece are used to avoid collisions within the machine tool and effectively reduce the range of motion of the machine tool. (See attached...) Figure 9 The test piece shown has a second bar 7 arranged at a 90° angle to bar 4, so even if the test grinding point is located as shown in the attached figure, the test grinding can be performed even if the test grinding point is located at the position shown in the attached figure. Figure 2 For point F at an angle of 135°, the machine tool can rotate only 45°, without needing to rotate significantly to 135° for test grinding at point F. (See attached image) Figure 10 In the trial grinding state, bar stock 4 is selected to test grind point C. When it is necessary to test grind point F, it can be directly as shown in the attached figure. Figure 11 As shown, bar stock 7 is selected to test grind point F. This allows for flexible selection of bar stock 4 or bar stock 7 based on the test grinding point, avoiding collisions with the test grinding piece during rotation switching and improving test grinding efficiency.

[0069] In this embodiment, the test piece is tooled, and the quantity and position of the bar stock 4 can be flexibly set according to the test grinding requirements. Its structure is simple and easy to assemble, and its small size makes it more suitable for multi-directional and difficult-angle test grinding point testing, thus improving the versatility of the test piece. At the same time, by effectively supporting and fixing the bar stock 4, the stability of the bar stock 4 is improved, ensuring that the force on each end face to be ground is uniform. When any end face to be ground is selected for test grinding, the same test grinding effect can be achieved, without being limited by position or angle, thereby ensuring the accuracy of test grinding.

[0070] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A test piece for measuring grinding wheel performance, characterized in that, The device includes a clamping rod, a positioning base, and a bar stock. The clamping rod is mounted on a CNC grinding machine, and the positioning base is located at one end of the clamping rod. The positioning base is a regular hexagonal structure with multiple inclined through holes extending in different directions through its β and γ faces, and a threaded hole on its δ face. The bar stock is placed in the inclined through holes. The bar stock includes at least one bar stock. The bar stock is a slender bar stock with a positioning hole or anti-slip layer in the middle. The ratio of the outer diameter of the cross-section of the bar stock to the diameter of the grinding wheel is less than 0.

1. The ratio of the length of the bar stock to the outer diameter of the cross-section is greater than 3. The bar stock can be positioned in multiple directions of the positioning base and form a certain angle with the surface of the positioning base to correspond to different test grinding points on the surface of the grinding wheel. Limiting rings are also provided on both sides of the inclined through holes of the positioning base. The bar stock includes at least one end face to be ground, which is perpendicular to the axis of the bar stock.

2. The test piece for grinding wheel testing and measurement according to claim 1, characterized in that: The bar stock includes two end faces to be ground, located at both ends of the bar stock.

3. The test piece for grinding wheel testing and measurement according to claim 1, characterized in that: The bar stock axis is perpendicular to the rotation axis of the CNC grinding machine or parallel to the translation axis of the CNC grinding machine.

4. The test piece for grinding wheel testing and measurement according to claim 1, characterized in that: The bar consists of one piece and forms a 45° angle with the surface of the positioning base.

5. The test piece for grinding wheel testing and measurement according to claim 1, characterized in that: The bar stock comprises two bars, which are perpendicularly intersecting and positioned on the positioning base.

6. A method for working on test grinding pieces for measuring grinding wheel test pieces, characterized in that: The test piece used for grinding measurement with the grinding wheel as described in any one of claims 1-5 includes the following steps: Step 1: Based on the grinding wheel structure, define the surface formed by rotating the AH line segment around the β axis as the grinding wheel's machining surface. Considering the production process, each grinding segment is required for machining the surface. Select the midpoint of each small grinding segment as the grinding point for that segment, thus defining multiple grinding points. The test grinding point is any point among these grinding points. Select the quantity of test grinding workpieces based on the number and location of the test grinding points. Adjust the position of the test grinding workpieces according to the location of the grinding wheel's test grinding points, ensuring that one end of the workpiece aligns with the test grinding point. Step 2: Set the trial grinding parameters so that the grinding wheel contacts the end face of the bar stock to be ground according to the set trial grinding path. The trial grinding parameters include grinding amount, coordinate parameters, and trial grinding path. The coordinate parameters include absolute coordinates, grinding wheel coordinates, and coordinates of the point to be ground. The grinding wheel shape parameters are also input into the CNC grinding machine processing conditions. The grinding wheel shape parameters include the corner radius, diameter, and cantilever beam length of the grinding wheel. A safe position point is also set on the grinding path. A safe point is marked in the middle of the path from the grinding wheel to the starting point or from the ending point back to the initial position as the starting point, which serves as the safe position. Step 3: Take out the test piece and measure the actual grinding amount on the end face to be ground in order to obtain the process parameters of the grinding wheel.

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