A cylindrical rotation accuracy detection tool, manufacturing method and detection method

Abstract

The present invention provides a cylindrical rotation accuracy detection tool, comprising: a disk body and a cylinder; the disk body is provided with a groove, the groove is annular and concentric with the disk body, a plurality of cylinders are arranged in the groove, there are gaps between the cylinders and the gaps are equal, and the axis of the disk body coincides with the rotation axis. A manufacturing method of a cylindrical rotation accuracy detection tool can manufacture the rotary axis rotation accuracy detection tool disclosed in the present invention, and has high precision that meets the requirements. A rotation accuracy detection method comprises the following steps: installing the rotary axis rotation accuracy detection tool on a workbench; rotating the workbench to a set angle; measuring the rotation angle of the cylinder. A rotation accuracy detection tool and detection method disclosed in the present invention can simply and accurately perform positioning accuracy detection and correction on the rotating axis of a five-axis machine tool.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool detection, and in particular to a cylindrical rotation accuracy detection tool, a manufacturing method and a detection method. Background Art

[0002] Currently, there are more and more five-axis CNC machine tools, and the rotary positioning accuracy of the machine tools needs to be calibrated and compensated regularly. In the existing technology, laser interferometers are generally used for calibration and compensation.

[0003] However, when using a laser interferometer to check and correct the positioning accuracy of a rotating axis, not only is the operation very troublesome, but the accuracy of the inspection and correction is also difficult to guarantee, which seriously affects the machine tool's processing of high-precision workpieces. Summary of the invention

[0004] The present invention provides a cylindrical rotation accuracy detection tool, a manufacturing method and a detection method to solve the above problems.

[0005] A cylindrical rotary precision detection tooling, comprising: a disc body and a cylinder;

[0006] The disk body is provided with a groove, which is annular and concentric with the disk body. A plurality of cylinders are arranged in the groove, the axes of the cylinders are perpendicular to the disk body, there are gaps between the cylinders and the gaps are equal, and the axis of the disk body coincides with the rotation axis.

[0007] Furthermore, a circular hole is provided on an outer wall of the groove, and the circular hole faces between the cylinders.

[0008] Furthermore, it also includes a positioning piece with a cone at the end, and the positioning piece can extend into the circular hole so that the conical surface of the cone abuts against the side surface of the cylinder.

[0009] Furthermore, the diameter of the positioning member is smaller than the diameter of the circular hole.

[0010] Furthermore, a boss is provided at the bottom of the groove, and an upper surface of the boss abuts against the cylinder.

[0011] Furthermore, it also includes a centering rod, the disk body is provided with a center hole, the axis of the centering rod coincides with the rotation axis of the workbench and coincides with the axis of the center hole.

[0012] A method for manufacturing a cylindrical rotary precision detection tool comprises the following steps:

[0013] S1: An annular groove is provided on the circular disk;

[0014] S2: a cylinder is arranged in the groove;

[0015] S3: injecting shaping material into the groove so that the lower part of the cylinder is immersed in the shaping material;

[0016] S4: The drive disc rotates at a constant speed until the shaped material is shaped.

[0017] A rotation accuracy detection method, using the cylindrical rotation accuracy detection tool, comprises the following steps:

[0018] S1: Install the rotary accuracy detection tooling on the workbench so that the axis of the disk coincides with the rotary axis;

[0019] S2: The servo motor rotates to the set angle;

[0020] S3: Measure the rotation angle of the cylinder.

[0021] Furthermore, the angle of rotation of the workbench is equal to an integer multiple of γ, γ=360° / n, where n is the number of cylinders.

[0022] Further, any one cylinder is selected, and any point on the side of the selected cylinder is set as an initial detection point, and points on the remaining cylinders corresponding to the positions of the initial detection points are set as target detection points;

[0023] Use a microscope with a scale, place the microscope at the same height as the inspection point, and point it toward the initial inspection point;

[0024] Start the servo motor and rotate it to a specified angle. After the rotation is completed, read the offset of the target detection point through the scale on the microscope, and calculate the angle error through the offset.

[0025] A cylindrical rotation accuracy detection tool and a detection method disclosed in the present invention can simply and accurately detect and correct the positioning accuracy of the rotating axis of a five-axis machine tool. The cylindrical rotation accuracy detection tool manufacturing method disclosed in the present invention can manufacture the cylindrical rotation fastening detection tool disclosed in the present invention with high precision to meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of a cylindrical rotation accuracy detection tooling structure disclosed in an embodiment of the present invention;

[0028] Figure 2 A top view of a cylindrical rotation accuracy detection tool disclosed in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Medium AA perspective section view;

[0030] Figure 4 for Figure 2 Enlarged view of part B;

[0031] Figure 5 for Figure 3 Enlarged view of part C;

[0032] Figure 6 It is a side view of a cylindrical rotation accuracy detection tool disclosed in an embodiment of the present invention.

[0033] In the figure:

[0034] 1. disc body; 11. groove; 12. round hole; 13. boss; 14. center hole;

[0035] 2. Cylinder;

[0036] 3. Centering rod;

[0037] 4. Positioning parts. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1 , Figure 2 As shown, a rotary accuracy detection tool comprises: a disc body 1 and a cylinder 2;

[0040] The disk body 1 is provided with an annular groove 11 which is concentric with the disk body 1 , and a plurality of cylinders 2 are arranged in the groove 11 , the axes of the cylinders 2 are perpendicular to the disk body 1 , there are gaps between the cylinders 2 , and the gaps between the cylinders 2 are equal, and the axis of the disk body 1 coincides with the rotation axis.

[0041] The cylinder in this embodiment is a high-precision stainless steel cylinder, the groove 11 is a circular groove, the circular groove is concentric with the disk body 1, the gap between the cylinders is very small, and the cylinders are nearly fully filled.

[0042] The cylinder divides the circumference into several equal parts. Since the cylinder has high precision, when the disk 1 rotates around its own axis, the angle corresponding to the same position on each cylinder is the same. Specifically, when the disk 1 is fixed on the workbench where the rotary axis is located, the workbench rotates, and the disk rotates accordingly. The servo motor drives the workbench to rotate through a fixed angle. The angle error between the actual rotation angle of the workbench and the angle driven by the servo motor can be measured by a high-precision cylinder set with equal gaps. The cylinder divides the circumference equally, and the angle corresponding to the rotation of each cylinder is fixed. The angle rotated by the servo motor is set to a fixed multiple of the corresponding angle of each cylinder. The actual rotation angle of the disk can be calculated by measuring the change of the relative same position on each cylinder. The angle rotated by the disk is the angle rotated by the workbench. The error α of the angle rotated by the workbench can be obtained, and the obtained angle error is compared with the angle corresponding to the rotation compensation file of the CNC system to determine the new angle compensation value ±α.

[0043] A circular hole 12 is formed on the outer wall of the groove 11 , and the circular hole 12 faces the center of the cylinders 2 .

[0044] For the convenience of observation, the closest point on the cylinders 2 is set as the detection point. The position of this point can be detected by high-power microscope observation or laser measurement, and then the angle of the disk body can be obtained. For the convenience of measurement, the circular hole 12 is facing the position between the cylinders 2, that is, facing the detection point, and the detection point can be observed through the circular hole 12. Figure 6 As shown, the number of the circular holes 12 is the same as the number of the cylinders 2 , that is, the gap between every two cylinders 2 can be observed through the circular holes 12 .

[0045] like Figure 4 As shown, this embodiment also includes a positioning member 4 with a cone at the end, and the positioning member 4 can extend into the circular hole 12 so that the conical surface of the cone abuts against the side surface of the cylinder 2.

[0046] One positioning member 4 can be provided to determine the approximate position of the cylinder when the position of the cylinder is not fixed. After determining the approximate position of one cylinder, the approximate positions of all other cylinders can also be determined. Multiple positioning members can also be provided to further limit the approximate positions of the cylinders and reduce the errors caused by the overlapping gaps between the cylinders.

[0047] The diameter of the positioning member 4 is smaller than the circular hole 12 , and the positioning member 4 can reduce the swing caused by the friction with the circular hole during the process of entering and exiting the circular hole, so that the positioning member 3 can enter and exit the circular hole 12 more easily and avoid affecting the position of the cylinder 2 .

[0048] like Figure 3 and Figure 5As shown, in this embodiment, a boss 13 is provided at the bottom of the groove 11 , and the upper surface of the boss 13 abuts against the cylinder 2 .

[0049] The upper surface of the boss 13 contacts the lower surface of the cylinder 2, which reduces the contact between the bottom surface of the groove 11 and the cylinder, and reduces the friction of the cylinder when adjusting its position.

[0050] In this embodiment, a centering rod 3 is further included. The disk body 1 is provided with a center hole 14 . The axis of the centering rod 3 coincides with the rotation axis of the workbench and coincides with the axis of the center hole 14 .

[0051] The centering rod 3 is used to connect the tray body 1 with the workbench. The workbench has a circular hole in the center. The centering rod 3 passes through the center hole 14 of the tray body and enters the circular hole of the workbench, so that the tray body 1 and the workbench are coaxial.

[0052] This embodiment also discloses a method for manufacturing a cylindrical rotation accuracy detection tool, comprising the following steps:

[0053] S1: An annular groove is provided on the circular disk;

[0054] S2: a cylinder is arranged in the groove;

[0055] S3: injecting shaping material into the groove so that the lower part of the cylinder is immersed in the shaping material;

[0056] S4: The drive disc rotates at a constant speed until the shaped material is shaped.

[0057] Specifically, the annular groove is concentric with the circular disk; 72 cylinders are placed in the groove, and the 72 cylinders are almost fully filled. There is a gap between the cylinders, and the gap width is about 0.005mm. The 72 cylinders divide the circumference equally, and the corresponding angle of each cylinder is 5°, that is, when each cylinder is rotated to the same position, the corresponding angle is 5°. An annular boss is machined at the bottom of the groove, and the annular boss is concentric with the annular groove, and the cylinder is placed on the boss.

[0058] The shaping material in this embodiment is resin, which is injected into the groove to drive the disk to rotate at a constant speed. Under the action of centrifugal force, the cylinders are evenly distributed and arranged at equal intervals. When the resin is solidified, the position of the cylinders can be fixed to maintain the same gap.

[0059] In order to make the circular hole face between the two cylinders, before the disk body rotates, insert the positioning piece into any circular hole to roughly position the cylinder, and then rotate the disk body. The diameter of the positioning piece is smaller than the diameter of the circular hole, and it leaves the circular hole under the action of centrifugal force, without affecting the automatic positioning of the cylinder.

[0060] The boss at the bottom of the groove reduces the contact area between the cylinder and the groove, reduces the friction force when the cylinder is automatically positioned, and makes it easier to adjust the position of the cylinder.

[0061] This embodiment also discloses a method for detecting the rotation accuracy of a rotary shaft, comprising the following steps:

[0062] S1: Install the cylindrical rotation accuracy detection tooling on the workbench; the centering rod 3 passes through the center hole 14 and the circular hole on the workbench to make the disk body 1 coaxial with the workbench.

[0063] S2: The workbench rotates to a set angle; the workbench rotates to an angle equal to an integer multiple of γ, γ = 360° / n, where n is the number of cylinders. In this embodiment, the number of cylinders is 72, and γ = 5°.

[0064] S3: Detect the rotation angle of the cylinder.

[0065] Specific methods for detecting the rotation angle of the ball include but are not limited to microscope observation measurement method and laser measurement method.

[0066] The microscope observation and measurement method uses a high-power microscope. In this embodiment, a microscope with a magnification of 1000 times is used, and the microscope is equipped with a scale.

[0067] First, select any cylinder, set any point on the side of the selected cylinder as the initial detection point, and set the points on the remaining cylinders corresponding to the position of the initial detection point as the target detection point; for the convenience of observation, set a point on the line with the shortest distance between the cylinders as the initial detection point;

[0068] Then, place the microscope at the same height as the detection point and point toward the initial detection point; record the scale corresponding to the initial detection point;

[0069] Finally, start the servo motor and rotate it to a specified angle. After the rotation is completed, read the offset of the target detection point through the scale on the microscope, and calculate the angle error through the offset.

[0070] The laser measurement method is different from the microscope observation measurement method in that it uses a laser emitting device to emit laser through the circular hole, adjust the laser to the position just blocked by the initial detection point, and then start the servo motor. After rotating the set angle, the position just blocked by the detection point is detected again by laser. The difference between the two positions is the offset of the detection point, and the angle error is calculated by the offset.

[0071] The detection needs to be carried out multiple times and the data needs to be recorded multiple times. Through multiple detections, the angle error α is calculated, and the obtained angle error is compared with the angle corresponding to the rotation compensation file of the CNC system to determine the new angle compensation value ±α.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cylindrical rotation accuracy detection tool, characterized in that: include: A disc body (1) and a cylinder (2); The disk body (1) is provided with a groove (11), the groove (11) is annular and concentric with the disk body (1), a plurality of cylinders (2) are arranged in the groove (11), the axes of the cylinders (2) are perpendicular to the disk body (1), there are gaps between the cylinders (2) and the gaps are equal, and the axis of the disk body (1) coincides with the rotation axis; It also comprises a centering rod (3), the disk body (1) is provided with a center hole (14), the axis of the centering rod (3) coincides with the rotation axis of the workbench and coincides with the axis of the center hole (14).

2. A cylindrical rotation accuracy detection tool according to claim 1, characterized in that: A circular hole (12) is provided on the outer wall of the groove (11), and the circular hole (12) faces the space between the cylindrical bodies (2).

3. A cylindrical rotation accuracy detection tool according to claim 2, characterized in that: It also comprises a positioning piece (4) with a cone at the end, the positioning piece (4) being able to extend into the circular hole (12) so that the conical surface of the cone abuts against the side surface of the cylinder (2).

4. A cylindrical rotation accuracy detection tool as described in claim 3, characterized in that: The diameter of the positioning member (4) is smaller than the diameter of the circular hole (12).

5. The cylindrical rotation accuracy detection tool according to claim 1, characterized in that: A boss (13) is provided at the bottom of the groove (11), and the upper surface of the boss (13) abuts against the cylinder (2).

6. A method for manufacturing a cylindrical rotation accuracy detection tool according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: An annular groove is provided on the circular disk; S2: a cylinder is arranged in the groove; S3: injecting liquid shaping material into the groove so that the lower part of the cylinder is immersed in the shaping material; S4: The drive disc rotates at a constant speed until the shaped material is shaped.

7. A rotation accuracy detection method, characterized in that: Using the cylindrical rotation accuracy detection tooling described in claims 1-5 comprises the following steps: S1: Install the rotary accuracy detection tooling according to any one of claims 1 to 5 on a workbench so that the axis of the disk coincides with the rotary axis; S2: The servo motor rotates to the set angle; S3: Measure the rotation angle of the cylinder.

8. A rotation accuracy detection method according to claim 7, characterized in that: The angle of rotation of the worktable is equal to an integer multiple of γ, γ=360° / n, where n is the number of cylinders.

9. A rotation accuracy detection method according to claim 8, characterized in that: Select any one cylinder, set any point on the side of the selected cylinder as the initial detection point, and set the points on the remaining cylinders corresponding to the position of the initial detection point as the target detection points; Use a microscope with a scale, place the microscope at the same height as the initial inspection point, and point it toward the initial inspection point; Start the servo motor and rotate it to a specified angle. After the rotation is completed, read the offset of the target detection point through the scale on the microscope, and calculate the angle error through the offset.

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