Grinding wheel trial grinding measurement method and system

Abstract

The present application relates to the technical field of grinding wheel testing process of multi-axis grinding machine, and discloses a grinding wheel testing method and system, which controls the relative movement of the grinding wheel and the testing piece on the numerical control grinding machine, so that the testing points on the grinding wheel test the testing piece according to the set testing path; comprising: step one, determining the testing points on the grinding wheel; and inputting the shape parameters of the grinding wheel into the numerical control grinding machine; step two, adjusting the position of the testing piece according to the position of the testing points, so that the end surface of the testing piece to be ground is in contact with the testing points; step three, setting the testing parameters; step four, testing the end surface of the testing piece according to the testing path, reversely calculating the process parameters of the testing points of the grinding wheel, and completing the testing test. The testing process of the present application can meet the testing requirements of the positions of all testing points, without repeatedly replacing the testing piece and the testing process, improving the universality of the testing piece and the testing process, reducing the production cost, avoiding the deformation of the grinding wheel, and ensuring the grinding accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding wheel test grinding process of multi-axis grinding machine, in particular to a grinding wheel test grinding measurement method and system. BACKGROUND

[0002] Grinding wheel is the most important grinding tool in grinding process. In order to ensure that the grinding granularity of workpiece meets the requirements, it is necessary to ensure the accuracy of the grinding point of the grinding wheel in contact with the grinding surface of the workpiece, so as to reduce the grinding error. Therefore, in order to determine whether the grinding point of the grinding wheel meets the requirements, the grinding wheel is first tested, and sensors such as machine tool probes are used to detect in real time to obtain real-time accurate data of process parameters such as grinding wheel shape.

[0003] The test grinding process is a process of using a workpiece that can be repeatedly ground and consumed to grind the workpiece with a fixed grinding scale. The workpiece used in the test grinding process is called a test grinding piece. The existing test grinding process applied in the grinding machine mainly has two kinds. One is to use an alloy cylindrical rod to measure the difference between the actual grinding amount and the expected grinding amount by grinding the edges formed by two symmetrical right-angle grooves on the cylindrical rod to obtain the shape of the curved surface processed by the grinding wheel. However, this method needs to feed an unground section along the axial direction for a new measurement each time, until the material is consumed, which results in low material utilization and inconvenient measurement.

[0004] The other is to use a thin disc piece to measure the error by continuously grinding two symmetrical circular arc segments to obtain process parameters. Although this method has higher material utilization than the cylindrical rod method, the grinding length is specified towards the center of the circle, so even if the grinding length is a fixed value, the grinding amount of the grinding wheel will increase as the disc cutting line increases, which easily causes the grinding wheel to wear, resulting in deformation of the curved surface processed by the grinding wheel during the test process, affecting the grinding accuracy. In addition, the disc piece needs to be customized, which increases the production cost.

[0005] At the same time, the above two test grinding processes need to use different test grinding pieces according to different scenes, and because the test grinding piece is continuously ground, its structural characteristics are different. Therefore, different test grinding process steps need to be designed according to the characteristics of the test grinding piece during the test grinding process, which results in inconsistent process before and after the test grinding process, complicated and unstable operation. Moreover, with the increasing requirement for the accuracy of parts, the test requirement for the grinding points of each surface of the grinding wheel is increasing, but the existing test grinding piece and test grinding process cannot meet the test requirement of each surface, which makes it difficult to ensure the test accuracy of the test grinding. SUMMARY

[0006] The present application aims to provide a grinding wheel test grinding measurement method and system to solve the problems of low material utilization, inaccurate measurement, non-universal test grinding process, and high production cost of the existing test grinding process.

[0007] In order to achieve the above object, the sand wheel test grinding measurement method and system are adopted, the relative movement of the sand wheel and the test grinding part is controlled on the numerical control grinding machine, the test grinding point on the sand wheel is made to test grind the test grinding part according to the set test grinding path; the test grinding steps are specifically as follows:

[0008] Step one, determine the test grinding point on the sand wheel; and input the shape parameters of the sand wheel into the numerical control grinding machine;

[0009] Step two, adjust the position of the test grinding part according to the position of the test grinding point, so that the grinding end surface of the test grinding part is in contact with the test grinding point;

[0010] Step three, set the test grinding parameters according to the test grinding requirements, the test grinding parameters include coordinate parameters, test grinding path and grinding allowance;

[0011] Step four, test grind the grinding end surface of the test grinding part according to the set test grinding path, analyze the test grinding result, and calculate the process parameters of the test grinding point of the sand wheel reversely, and complete the test grinding test.

[0012] The principle and advantages of the scheme are:

[0013] The test grinding process is an indispensable test process in grinding processing, which can ensure the accuracy of grinding and improve product quality. However, the grinding process is mainly based on the cooperation of consumables grinding, and the grinding allowance of the test grinding part is measured to achieve the measurement purpose. However, the process is short, and the consumption of consumables is not much, so the selection of consumables is not too much, so a lot of time and effort is not spent on designing the whole test grinding process. Because of the different structures of each machining part, the test grinding points needed to be tested are different, and because of the installation position of the sand wheel, some test grinding points are blocked or blocked, which makes it difficult to test grind the test grinding part. Although there are some special test grinding parts according to the characteristics of different part structures, it is still difficult to meet the test requirements of all test grinding points. Therefore, when testing the sand wheel, the position of the sand wheel is mirrored and equivalent, and it is considered that the process parameters of the mirror-symmetrical test grinding points are equivalent. However, in actual test grinding, each test grinding point will be different, which makes it difficult to ensure the accuracy of the test grinding test result. Therefore, the current test grinding process still has the problems of non-universal test grinding process and non-universal test grinding part. With the increase of the precision requirement of parts, the non-universal problem will bring more complicated operation problems, so that it is difficult to ensure the grinding accuracy and the utilization rate of consumables is reduced.

[0014] The application sets the position of the test grinding point and the position of the grinding end face of the test grinding piece, so that the test grinding piece can meet the test grinding requirements of each test grinding point in the planned shortest path without being limited by the installation position of the grinding wheel, and the operation is more convenient and fast. The position of the test grinding piece is adjusted directly, without repeated replacement of the test grinding piece and the test grinding process, thereby improving the universality of the test grinding piece and the test grinding process, and reducing the production cost. At the same time, by setting the grinding end face of the test grinding piece and the test grinding path of the test grinding point, the path is reasonably planned, the test grinding time is shortened, the accuracy and stability of the test grinding process are ensured, the test grinding process is avoided to be blocked or collided, the measurement result is affected, and the test grinding efficiency is improved. At the same time, the grinding amount in the test grinding process is also reduced, the deformation of the grinding wheel is avoided, and the grinding accuracy is ensured. The shape parameters of the grinding wheel can be obtained by reverse analysis of the test grinding result after the grinding end face is tested, the operation is more simple and convenient, and the accuracy is higher.

[0015] Further, in step one, further comprising marking a plurality of grinding points on the surface of the grinding wheel, and the test grinding point is any one of the grinding points.

[0016] Beneficial effect: according to the test grinding requirements, a plurality of test grinding points are reasonably marked, the difficulty of test grinding of the test grinding points is reduced, the shape parameters of the grinding wheel are fully and effectively tested, and the effective test grinding of each test grinding point is ensured to meet the measurement requirements of each test grinding point.

[0017] Further, the shape parameters of the grinding wheel include the corner radius of the grinding wheel, the diameter of the grinding wheel, and the cantilever beam length of the grinding wheel.

[0018] Beneficial effect: the shape parameters of the grinding wheel are input into the numerical control grinding machine, so as to form an ideal grinding wheel structure, which is used as a comparison parameter, so as to compare the test grinding result after test grinding, so as to obtain the real-time shape parameters of the grinding wheel, so as to ensure the accuracy and effectiveness of the data.

[0019] Further, the test grinding piece includes a base and a rod, the rod is arranged in the base, and the two ends of the rod pass through the base and are located outside the base; the grinding end face is arranged at the two ends of the rod.

[0020] Beneficial effect: the slender rod structure is adopted, the position of the grinding end face is more convenient to adjust, the grinding end face can be in effective contact with each test grinding point, and the installation position of the grinding wheel is not limited, so that the comprehensive test grinding measurement requirement is met. The length of the slender rod structure is easier to measure, the operation is more convenient, and the measurement accuracy is easier to ensure. At the same time, the material of the test grinding piece is also reduced, the material utilization rate is improved, and the cost of consumables is effectively reduced.

[0021] Further, the coordinate parameters include absolute coordinates, grinding wheel coordinates and grinding end face coordinates.

[0022] Beneficial effect: according to the set coordinate value can more accurately obtain each position information, improve the measurement accuracy.

[0023] Further, the test grinding path is set according to the position of the test grinding point and the end face to be ground; the test grinding path includes a straight line path, a single-point grinding path and a curved grinding path.

[0024] Beneficial effect: according to the relative position of the test grinding point and the end face to be ground, the test grinding path is designed, the shortest effective test grinding path is reasonably planned, the test grinding time is reduced, the effectiveness of test grinding is ensured, and collision or blocking during test grinding is avoided, which affects the test grinding result. At the same time, the best test grinding path can be designed, the test grinding time is reduced, the test grinding process is shortened, and the test grinding efficiency is further improved.

[0025] Further, the test grinding path further includes a safety position point, and the safety position point is located at the starting position end and the ending position end of the test grinding path, respectively.

[0026] Beneficial effect: setting the safety position point can effectively speed up the process and improve the process safety.

[0027] Further, the grinding amount is the grinding length along the axis direction of the end face of the bar to be ground; and the grinding amount is less than the diameter of the bar.

[0028] Beneficial effect: according to the diameter of the bar, the grinding amount can be flexibly set, which can meet the grinding requirements and reduce the grinding amount, so that the test grinding process is completed with as little grinding amount as possible, the utilization rate of the bar material is improved, and the wear of the grinding wheel is reduced, effectively avoiding the deformation of the grinding wheel.

[0029] The present application also provides a grinding wheel test grinding measurement system applied to the grinding wheel test grinding measurement method, comprising a multi-axis numerical control grinding machine, a test grinding piece and a grinding wheel arranged on the multi-axis numerical control grinding machine; wherein the test grinding piece comprises a clamping rod, a positioning block and a bar, the clamping rod is arranged on the multi-axis numerical control grinding machine, the positioning block is arranged on the clamping rod, and the bar is arranged on the positioning block.

[0030] Further, the positioning block is a regular hexahedron structure; and the bar includes at least one and is at an angle of 45° or 90° with the surface of the positioning block. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a test method flowchart of the embodiment one of the present application.

[0032] Figure 2 It is a grinding point schematic diagram of the cross section of the grinding wheel of the embodiment one of the present application.

[0033] Figure 3 It is a structure schematic diagram of the test grinding piece in the embodiment one of the present application.

[0034] Figure 4 is a test grinding scene application structure schematic diagram in the embodiment four of the present application.

[0035] Figure 5 is a test grinding scene application structure schematic diagram in the embodiment four of the present application.

[0036] Figure 6 is a test grinding scene application structure schematic diagram in the embodiment four of the present application.

[0037] Figure 7 is a test grinding scene application structure schematic diagram in the embodiment four of the present application.

[0038] Figure 8 is a test grinding scene application structure schematic diagram in the embodiment four of the present application.

[0039] Figure 9 is a test grinding scene application structure schematic diagram in the embodiment four of the present application.

[0040] Figure 10 is a test grinding scene application structure schematic diagram in the embodiment four of the present application. DETAILED DESCRIPTION

[0041] The following is further described in detail through specific embodiments:

[0042] The reference signs in the drawings of the specification include: grinding wheel spindle 1, machine tool base 2, grinding wheel 3, positioning block 4, bar 5, clamping rod 6, screw 7.

[0043] Embodiment one

[0044] The present embodiment is shown in the accompanying drawings Figure 1 The grinding wheel test grinding measurement method and system are used to solve the problems that the existing test grinding process is not universal, cannot meet the test requirements of grinding wheel test grinding points, and the test grinding process is complicated, the single test grinding amount is large and unstable, and the test precision is low.

[0045] Specifically, a grinding wheel test grinding measurement method is provided, which drives the grinding wheel and the test grinding part to move relatively on the numerical control grinding machine, so that the test grinding point moves according to the set test grinding path, so that the test grinding part can test grind at the set grinding wheel test grinding point, and the position of the end face of the test grinding part is obtained before and after test grinding by using a measurement means, so as to obtain the grinding amount of the test grinding part. Compare the grinding amount with the set grinding length to obtain the process parameters of the grinding wheel test grinding point. Specifically, the following steps are included:

[0046] S1, determine the test grinding point. As shown in the accompanying drawings Figure 2The grinding point schematic diagram of the shown grinding wheel section, wherein the grinding wheel is symmetrical along the a center line, in the processing process, the grinding wheel rotates at high speed around the grinding wheel β longitudinal axis, wherein the surface formed by the rotation of the A-H line segment around the β axis is the processing surface of the grinding wheel, combined with the grinding wheel processing surface required in the production process, the middle position of each small grinding segment is selected as the grinding point of each grinding segment, the A, B, C, D, E, F, G and H points are drawn as the grinding points of the grinding wheel, the test grinding point is any point in the drawn grinding point, through the accurate division of the grinding point, the comprehensiveness and effectiveness of the test grinding are ensured, and the position of the test grinding point is accurately determined, and the test grinding effect is ensured. According to the grinding requirement of the part, the grinding point is tested to obtain the process parameters of the grinding point. In this embodiment, the process parameters for obtaining the position information of the grinding wheel section contour C point are taken as an example, and the corresponding position of the C point is taken as the test grinding point for illustration.

[0047] S2, install the test grinding part. In this embodiment, the grinding machine is a three-translation grinding machine, that is, the grinding machine has translation axes along the X, Y and Z axes. The test grinding part adopts the test grinding part shown in the attached Figure 3 The test grinding part shown in the attached Figure 4 In this embodiment, the test grinding part includes a clamping rod 6, a positioning block 4 and a bar 5. The clamping rod 6 is used to be connected with the grinding machine, and the bar 5 can be moved or rotated by the grinding machine. The positioning block 4 has a regular hexahedral structure, and one side of the positioning block 4 is welded to one end of the clamping rod 6. The bar 5 is inserted into the positioning block 4 and forms a 45° angle with the intersecting end face of the positioning block 4. The bar 5 is fixed in the positioning block 4 by a screw 7. In this embodiment, the bar 5 is a cylindrical cemented carbide bar with a diameter of 1 mm. At the same time, in this embodiment, the bar 5 can also be selected to have multiple bars according to the position and number of the test grinding points. The axial direction of the bar to be ground can be set in multiple directions.

[0048] As shown in the attached Figure 4 According to the set test grinding point position, the test grinding part is installed on the machine tool base 2 of the grinding machine, and the axis of the bar 5 is adjusted to the position shown in the attached Figure 4 At this time, it is assumed that the I point in the figure is the drawn C point test grinding point, so that the grinding end face of the bar 5 is in contact with the test grinding point I of the grinding wheel. The grinding wheel includes a grinding wheel spindle 1 and a grinding wheel 3, and the grinding wheel 3 is rotated by the grinding wheel spindle 1.

[0049] S3, plan the test grinding path. Confirm the absolute coordinates and the grinding wheel coordinates on the calibrated numerical control grinding machine. Input the grinding wheel shape parameters into the numerical control grinding machine processing conditions, wherein the grinding wheel shape parameters include the grinding wheel fillet radius, the grinding wheel diameter and the grinding wheel cantilever beam length. Use the grinding machine probe to detect and obtain the bar end face coordinates of the test grinding part as the test grinding point coordinates of the test grinding part. Use this as the test grinding movement to provide accurate path coordinate control.

[0050] Based on the grinding wheel profile points, the grinding path is determined to be a straight line, as shown in the attached figure. Figure 4 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 I within the CNC grinding machine. Point I 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 I may be uneven. The test grinding path in this embodiment always ensures that the convex part at point I 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 contact the grinding wheel test point, and not contact other parts besides the test point.

[0051] 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.

[0052] S4, Preparation for Trial Grinding. Adjust the axis of the test grinding piece 5 to be in the XY plane, and make it 45° counterclockwise with the X-axis, so that it is perpendicular to the determined bc machining path, making it easy to use the grinding wheel profile I point to achieve grinding within the straight machining path. Set the grinding amount. According to the diameter of the used bar 5, in this embodiment, the diameter of the bar 5 is 1mm, so the grinding amount is set to 0.01mm along the axis of the end face to be ground of the bar 5. This satisfies the grinding test requirements, reduces the grinding amount, improves material utilization, reduces wear on the grinding wheel, and avoids grinding wheel deformation. In this embodiment, the grinding amount can be flexibly set according to the diameter of the selected bar 5, and there is no limitation here. Using a slender bar 5 can meet the grinding requirements while reducing the grinding amount, completing the trial grinding process with the least possible grinding amount, improving the material utilization of the bar 5, reducing wear on the grinding wheel, and effectively avoiding grinding wheel deformation.

[0053] S5, Trial Grinding Stage. 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 stock 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 end face of bar stock 5 along the machining path from b to c, reaching position c, and then slowly returns to the safe position d. From point d, it returns to the initial position, completing the trial grinding process.

[0054] In the trial grinding implementation stage, the effective trial grinding path is from b to c. In the effective trial grinding path, the technician intends to make the end face of the bar to be ground contact the trial grinding point I of the grinding wheel, and not contact other parts except the trial grinding point I. If the trial grinding point I grinds to the end face of the bar to be ground, the trial grinding point I actually contacts the end face. Otherwise, the trial grinding point I does not actually contact the end face.

[0055] S6, test stage. After the trial grinding is completed, the end face of the bar 5 becomes a complete plane that can be detected by the machine tool. The normal direction of the plane is perpendicular to the grinding path. The trial grinding part is removed from the grinding machine, and the end face is detected to determine whether the position of the end face changes by 0.01 mm. Then, the actual profile of the grinding wheel at the trial grinding point I is reversely calculated, so that the process parameters of the grinding wheel at the trial grinding point I are obtained, thereby achieving the effect of precise trial grinding measurement.

[0056] In the embodiment, the trial grinding point is preliminarily positioned, the trial grinding part is installed and adjusted according to the positioned trial grinding point, and the end face to be ground of the trial grinding part can effectively contact the preset trial grinding point. The trial grinding part can meet the trial grinding measurement requirements of the trial grinding points of each surface of the grinding wheel. The end face of the bar is used as the end face to be ground, which is more flexible in adjusting the position of the bar 5, easy to operate, not limited by the installation position of the grinding wheel, can directly contact the multi-directional trial grinding point, meets the test requirements of the multiple trial grinding points, and improves the precision of the trial grinding measurement of the grinding wheel. At the same time, because the structure of the bar 5 is uniform, the measurement is easy to standardize, the grinding allowance can be directly set to 0.01 mm for trial grinding, the trial grinding measurement effect can be achieved, the grinding allowance is reduced, the wear of the grinding wheel in the trial grinding process is reduced, the deformation of the grinding wheel is avoided, the grinding precision is improved, the material utilization rate of the bar 5 is higher, and the production cost is lower.

[0057] According to the position of the trial grinding point and the cooperation of the end face to be ground, the optimal grinding path can be reasonably designed, the trial grinding efficiency is improved, the trial grinding time is reduced, the bar 5 is prevented from contacting or being blocked by other parts of the grinding wheel, the effectiveness and precision of the trial grinding are ensured, and the trial grinding precision is improved.

[0058] Embodiment two

[0059] In the embodiment, a grinding wheel trial grinding measurement system is also provided, as shown in FIG. 6. Figure 4As shown, including multi-axis CNC grinding machine, set in the multi-axis CNC grinding machine machine bed 2, the front end of the machine bed 2 is installed with a test grinding piece, in this embodiment, the test grinding piece includes a clamping rod 6 connected with the machine bed 2, a positioning block 4 is welded in front of the clamping rod 6, a rod 5 is fixedly installed in the positioning block 4 through a screw 7, and the rod 5 is at an angle of 45° with the surface of the positioning block 4. A grinding wheel is provided on the numerical control grinding machine, and the grinding wheel includes a grinding wheel spindle 1 and a grinding wheel 3, the grinding wheel 3 is driven to rotate by the grinding wheel spindle 1, and the grinding wheel spindle 1 is installed on the numerical control grinding machine. In this embodiment, the multi-axis CNC grinding machine is a numerical control grinding machine commonly used in industrial processing, wherein the multi-axis includes a machine tool translational axis or a rotary axis to realize various motion modes such as translation or rotation of the grinding machine.

[0060] The absolute coordinates and the grinding wheel coordinates are determined through the multi-axis CNC grinding machine, and the grinding wheel shape parameters are input into the numerical control grinding machine processing conditions to determine the preset shape process parameters of the grinding wheel. According to the determined coordinate position, the grinding path can be set to ensure the effectiveness and accuracy of the grinding path. The multi-axis CNC grinding machine controls the motion path of the grinding wheel according to the grinding path to achieve the test grinding effect, and the numerical control grinding machine detects the grinding end face through the self-provided measuring probe, compares the detection result with the set parameters, and inversely calculates the shape parameters of the grinding wheel test grinding point to achieve the test grinding measurement effect.

[0061] In this embodiment, the test grinding piece can also use two rods 5, wherein the two rods 5 are vertically arranged in the positioning block 4 at an angle of 90°, and the two rods 5 are arranged at an angle of 90° with the surface of the positioning block 4. By setting two rods 5, the applicable rod 5 can be flexibly selected according to the test grinding point, so as to avoid greatly adjusting the grinding path or causing obstruction during grinding, thereby simplifying the grinding path and improving the test grinding efficiency.

[0062] Embodiment three

[0063] Different from embodiment one, in this embodiment, a rotary axis that can rotate the test grinding piece is additionally provided in the numerical control grinding machine besides the three translational axes. In this case, the advantages of test grinding piece rotation can be fully utilized to reduce the setting of the required rod. As shown in the accompanying Figure 5 The numerical control grinding machine includes an X-rotary axis that can rotate the test grinding piece. During the test grinding process, the rotary axis can be used to rotate the rod to be ground to the required test angle, as shown by the dotted line in the A-A view in the accompanying Figure 5 Any position, thereby improving the fitting degree of each test grinding point position, meeting the test grinding requirements of different positions, reducing the setting of the rod 5, improving the utilization rate of the rod, reducing the production cost, reducing the repeated adjustment of the test grinding process, simplifying the test grinding process operation, and improving the universality of the test grinding piece and the test grinding process.

[0064] Embodiment four

[0065] Different from the first embodiment, in this embodiment, it is shown that the CNC grinding machine contains 3 translational axes and 1 rotational axis to make the test grinding piece swing. In this case, as shown in the attached Figure 6 figure, the CNC grinding machine contains a Z rotational axis to make the test grinding piece rotate. During the test grinding process, the rotational axis can be used to rotate the bar stock to the required test grinding angle, i.e. Figure 6 any position shown by the dashed line in the middle, so as to reduce the number of bar stocks used while meeting the test grinding requirements of each test grinding point.

[0066] Meanwhile, in this embodiment, a rotational axis as shown in the attached Figure 7 figure is provided to rotate the grinding wheel to the required test grinding angle without changing the angle position of the test grinding piece, so as to achieve the same test grinding effect and improve the test grinding efficiency.

[0067] Embodiment five

[0068] Different from the first embodiment, in this embodiment, it is shown that the CNC grinding machine contains 3 translational axes and 1 rotational axis to make the test grinding piece swing. In this case, as shown in the attached Figure 5 + Figure 6 figure, the CNC grinding machine contains a Z rotational axis to make the test grinding piece rotate. During the test grinding process, the rotational axis can be used to rotate the bar stock to the required test grinding angle, i.e. Figure 5 + Figure 7 any position shown by the dashed line in the middle, so as to reduce the number of bar stocks used while meeting the test grinding requirements of each test grinding point.

[0069] Embodiment six

[0070] Different from the first embodiment, in this embodiment, it is shown that a single-point grinding path along the normal feed-out of the test grinding point of the grinding wheel is used to grind the test grinding piece. As shown in the attached Figure 8 figure, in this process, if a curved or straight path is used, the risk of collision between the grinding wheel spindle and the test grinding piece will increase. Therefore, the single-point grinding path is more suitable, which can improve the grinding efficiency, reduce the grinding error, and effectively improve the test grinding accuracy.

[0071] Embodiment seven

[0072] Different from the first embodiment, in this embodiment, it is shown that a straight effective grinding path perpendicular to the rotational axis of the grinding wheel in the tangent plane. As shown in the attached Figure 9 figure, the operator wants to use the test grinding point A of the grinding wheel for test grinding measurement, but due to the local wear of the grinding wheel 3 in the previous use, the actual test grinding point is at the concave point B. In this case, if an effective grinding path is designed in the XY plane, the convex points C \ D near the test grinding point A will participate in grinding. As shown in the attached Figure 9The effective grinding path in the XZ plane shown in the middle A-A view can achieve the effect of grinding by using the B point.

[0073] Meanwhile, if the movement of the grinding wheel in the XZ plane is blocked or a collision can occur, a curve effective grinding path perpendicular to the rotation axis of the grinding wheel in the tangent plane can also be used, such as the curve effective grinding path shown in the lower part of FIG. 1. Figure 10 The curve effective grinding path shown in the lower part of FIG. 1 is used for trial grinding to avoid the collision problem.

[0074] The above is only an embodiment of the present application, and common technical solutions and / or characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A method of measuring the wear of a grinding wheel, characterized by, The test grinding point on the grinding wheel is made to grind the test grinding piece according to the set test grinding path by controlling the relative movement of the grinding wheel and the test grinding piece on the numerical control grinding machine; the test grinding method comprises the following steps: Step one: selecting the middle position of each small grinding section as the grinding point of each grinding section, and marking a plurality of grinding points on the grinding wheel machining surface, the test grinding point being any one of the grinding points; determining the test grinding point on the grinding wheel; and inputting the shape parameters of the grinding wheel into the numerical control grinding machine; the shape parameters of the grinding wheel include the corner radius of the grinding wheel, the diameter of the grinding wheel, and the cantilever beam length of the grinding wheel; Step two: the test grinding piece comprises a positioning block and a rod, the positioning block has a regular hexahedral structure, the rod is inserted into the positioning block, and the two ends of the rod pass through the positioning block and are located outside the surface of the positioning block; the rod is a cylindrical cemented carbide rod with a diameter of 1mm, and has a grinding end face at each end; the position of the test grinding piece is adjusted according to the position of the test grinding point, so that the grinding end face of the test grinding piece is in contact with the test grinding point; Step three: setting test grinding parameters according to test grinding requirements, the test grinding parameters including coordinate parameters, test grinding path and grinding amount; the coordinate parameters including absolute coordinates, grinding wheel coordinates and grinding end face coordinates; the test grinding path is set according to the position of the test grinding point and the grinding end face; the test grinding path includes a straight line path, a single point grinding path and a curved grinding path; the test grinding path further includes a safety position point, which is a standby starting point set in the middle of the path of the grinding wheel moving to the starting point or retreating from the ending point to the initial position, and is used as the safety position point; Step four: grinding the grinding end face of the test grinding piece according to the set test grinding path, and analyzing the test grinding result to calculate the actual profile of the test grinding point of the grinding wheel in reverse, and completing the test grinding test.

2. The method of claim 1, wherein: The safety position point is located at the starting position end and the ending position end of the test grinding path respectively.

3. The method of claim 1, wherein: The grinding amount is the grinding length along the axis of the grinding end face of the rod; The grinding amount is less than the diameter of the rod.

4. A grinding wheel trial measurement system characterized by: The test grinding method is applied to the grinding wheel test grinding measurement method of any one of claims 1-3, comprising a multi-axis numerical control grinding machine, a test grinding piece and a grinding wheel arranged on the multi-axis numerical control grinding machine; wherein the test grinding piece comprises a clamping rod, a positioning block and a rod, the clamping rod is arranged on the multi-axis numerical control grinding machine, the positioning block is arranged on the clamping rod, and the rod is arranged on the positioning block.

5. The grinding wheel truing and dressing measurement system of claim 4, wherein: The positioning block has a regular hexahedral structure; the rod comprises at least one rod and has an angle of 45° or 90° with the surface of the positioning block.

Images