Method and calibration device for calibrating the rotation angle of a machine tool worktable by using a combination method

Abstract

The present invention relates to a method and a calibration device for calibrating the rotation angle of a machine tool workbench by using a combination method; it solves the problem that in the prior art, it is necessary to calibrate angles that are not integer multiples of 10° and 15° to ensure the machining accuracy of the engine injector disk, but currently there is no method that can achieve the calibration of angles that are not integer multiples of 10° and 15°; the calibration device includes a base, an optical-electronic autocollimator, a pedestal, a limiting member, a sphere, a regular polyhedron prism, and at least three adjusting screws; the base is connected to the machine tool workbench; the optical-electronic autocollimator is installed on one side of the machine tool workbench, the pedestal is arranged above the base, the sphere is installed between the pedestal and the base and is located at the central position, at least three adjusting screws are evenly distributed around the sphere, and after the adjusting screws are screwed into the base, they are connected to the pedestal; the limiting member is installed on the pedestal, and at the same time, a calibration method is proposed, and by using multiple groups of regular polyhedron prisms in combination, the calibration of angles that are not integer multiples of 10° and 15° is realized.

Description

Technical Field

[0001] The present invention relates to the calibration of the rotation angle of the workbench of an engine injector disk processing machine tool, and specifically relates to a method and a calibration device for calibrating the rotation angle of the workbench of the machine tool by using a combination method. Background Art

[0002] Generally, before machining an engine injector disk, it is necessary to calibrate the rotation angle of the workbench of the machine tool. The calibration method is as follows: First, a regular polyhedron is fixed on the workbench of the machine tool, and then an optoelectronic autocollimator is installed on one side of the workbench. During calibration, the workbench of the machine tool is rotated at different angles, and the value measured by the optoelectronic autocollimator is the error value between the actual angle value after the rotation of the workbench of the machine tool and the theoretical rotation angle. This error value is the rotation error of the workbench of the machine tool.

[0003] The existing single regular polyhedron can only measure angles that are integer multiples of 10° and 15°. However, if only angles that are integer multiples of 10° and 15° are calibrated, there will be errors in the machined engine injector disk. Therefore, it is necessary to calibrate angles that are not integer multiples of 10° and 15° to ensure the machining accuracy of the engine injector disk. However, there is currently no method that can achieve the calibration of angles that are not integer multiples of 10° and 15°. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that it is necessary to calibrate angles that are not integer multiples of 10° and 15° to ensure the machining accuracy of the engine injector disk, but there is currently no method that can achieve the calibration of angles that are not integer multiples of 10° and 15°, and to provide a method and a calibration device for calibrating the rotation angle of the workbench of the machine tool by using a combination method.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A method for calibrating the rotation angle of the workbench of a machine tool by using a combination method, which is characterized in that:

[0007] It includes the following steps:

[0008] Step 1: Leveling

[0009] Install the optoelectronic autocollimator on one side of the workbench, fix the regular polyhedron at the center of the workbench, and level it so that the upper surface of the workbench is parallel to the upper surface of the regular polyhedron;

[0010] Step 2: Return the workbench to the zero position

[0011] After the regular polyhedron is leveled, rotate the workbench of the machine tool to 0°, and then zero the reading of the optoelectronic autocollimator;

[0012] Step 3: Measurement

[0013] Step 3.1: Measure the error value at 15°:

[0014] The regular polyhedron prism in Step 1 has 24 faces. After completing Step 2, the optoelectronic autocollimator finds the image and zeros. Control the workbench to rotate 15°, read the current reading of the optoelectronic autocollimator, and obtain the error value after the workbench rotates 15°;

[0015] Step 3.2: Measure the error value at 25°

[0016] Step 3.2.1: After completing Step 3.1, keep the workbench stationary at the current position, replace the 24-face regular polyhedron prism with a 36-face regular polyhedron prism, zero the reading of the optoelectronic autocollimator again, continue to control the workbench to rotate 10°, read the current reading of the optoelectronic autocollimator, and obtain the error value after the workbench rotates 10° again;

[0017] Step 3.2.2: Take the algebraic sum of the error value measured in Step 3.1 and the error value measured in Step 3.2.1 as the error value when the workbench rotates 25°;

[0018] Step 3.3: Measure the error value at 35°

[0019] Step 3.3.1: After completing Step 3.2, continue to rotate the workbench 10°, that is, the workbench rotates 35°, read the current reading of the optoelectronic autocollimator, and obtain the error value after the workbench rotates 10° for the second time;

[0020] Step 3.3.2: Take the algebraic sum of the error value measured in Step 3.2.2 and the error value measured in Step 3.3.1 as the error value when the workbench rotates 35°;

[0021] Step 3.4: Measure the error value at 10°

[0022] After completing Step 3.3, rotate the workbench to 0°, the optoelectronic autocollimator finds the image and zeros, rotate the workbench 10°, read the current reading of the optoelectronic autocollimator, and obtain the error value after the workbench rotates 10°.

[0023] Furthermore, the standard for leveling the regular polyhedron prism in Step 1 is that after multiple adjustments, the workbench rotates back and forth within its rotation range, and the error in the horizontal direction of the optoelectronic autocollimator always remains within 10″.

[0024] Furthermore, the leveling of the regular polyhedron prism in Step 1 includes the following steps:

[0025] Step 1.1: Make the workbench rotate back and forth within its rotation range, and at the same time check whether the reading in the horizontal direction of the optoelectronic autocollimator remains within 10″ during the rotation of the workbench;

[0026] If it always remains within 10″, proceed to Step 1.3. If the reading exceeds 10″ when rotated to a certain angle, stop the rotation of the worktable and proceed to Step 1.2;

[0027] Step 1.2: Level the multi-faceted prism

[0028] Step 1.2.1: Adjust the position of the multi-faceted prism so that the reading in the horizontal direction of the optoelectronic autocollimator falls within 10″;

[0029] Step 1.2.2: Return to Step 1;

[0030] Step 1.3: End the leveling of the multi-faceted prism and perform calibration of the rotation angle of the worktable.

[0031] The present invention also provides a device for calibrating the rotation angle of a machine tool worktable by a combination method, which is characterized in that:

[0032] A device for calibrating the rotation angle of a machine tool worktable by a combination method, which is characterized in that:

[0033] It includes a base, an optoelectronic autocollimator, a pedestal, a limiting member, a sphere, a multi-faceted prism, and at least three adjusting screws;

[0034] The base is connected to the machine tool worktable;

[0035] The optoelectronic autocollimator is installed on one side of the machine tool worktable and is used to cooperate with the multi-faceted prism to calibrate the rotation angle of the machine tool worktable;

[0036] The pedestal is arranged parallel to the base above;

[0037] The sphere is installed between the pedestal and the base and is located at the central position. At least three adjusting screws are evenly distributed around the sphere. The adjusting screws are screwed into the base from bottom to top and then connected to the pedestal;

[0038] The limiting member is installed on the pedestal and is used to fix the multi-faceted prism.

[0039] Furthermore, the limiting member includes a cylinder, a stud, and a nut;

[0040] The cylinder is connected to the pedestal, and the stud is coaxially connected to the cylinder;

[0041] The multi-faceted prism is sleeved outside the cylinder;

[0042] The nut is connected to the stud and is used to fix the multi-faceted prism;

[0043] The sphere coincides with the axis of the cylinder.

[0044] Furthermore, a first groove opening downward is formed on the upper end surface of the base, a second groove opening upward is formed on the lower end surface of the base, and the sphere is arranged in the first groove and the second groove; the depths of the first groove and the second groove are both smaller than the radius of the sphere.

[0045] Furthermore, the regular polyhedral prism is a regular 24-sided polyhedral prism or a regular 36-sided polyhedral prism.

[0046] Furthermore, the number of the adjusting screws is four.

[0047] The beneficial effects of the present invention are as follows:

[0048] 1. The method for calibrating the rotation angle of the machine tool workbench by using the combination method in the present invention can measure the combined angle error values such as 35° and 25° through the combined use of a regular 24-sided polyhedral prism and a regular 36-sided polyhedral prism, and further improve the machining accuracy of the engine injector disk.

[0049] 2. The method for calibrating the rotation angle of the machine tool workbench by using the combination method in the present invention is also applicable to the combined use method of other regular polyhedral prisms with different numbers of side edges, and has strong practicability.

[0050] 3. The method for calibrating the rotation angle of the machine tool workbench by using the combination method in the present invention has a simple measurement method, low professional requirements for staff, and high calibration efficiency.

[0051] 4. The device for calibrating the rotation angle of the machine tool workbench by using the combination method in the present invention realizes the fixation of the regular polyhedral prism through the arranged base and the limiting member, and can realize the rapid leveling of the regular polyhedral prism through the arranged adjusting member, with a simple structure and convenient operation.

[0052] 5. The calibration device for calibrating a small hole drilling machine by using the combination method in the present invention fixes the regular polyhedral prism on the base through a cylinder, a stud and a nut, and can realize the rapid replacement of the regular polyhedral prism, thereby accelerating the adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0054] In the figure, 1. base; 2. base; 3. cylinder; 4. stud; 5. adjusting screw; 6. sphere. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] To make the objectives, advantages and features of the present invention clearer, the following further elaborates in detail on the method and calibration device for calibrating the rotation angle of a machine tool workbench proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following specific implementation manners, the advantages and features of the present invention will be clearer. It should be noted that: the accompanying drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the objectives of the embodiments of the present invention; secondly, the structures shown in the accompanying drawings are often part of the actual structures.

[0056] The present invention will be described in detail below in combination with the accompanying drawings and specific implementation manners.

[0057] The present invention provides a specific implementation structure of the calibration device. Taking four adjusting screws 5 as an example, as Figure 1 shown, it includes a base 1, a pedestal 2, a limiting member, a sphere 6, an optical autocollimator, a regular polyhedron prism, and four adjusting screws 5; the optical autocollimator and the regular polyhedron prism are not shown in the figure;

[0058] The functions of each component are as follows:

[0059] Limiting member: used to fix the regular polyhedron prism on the pedestal 2.

[0060] Adjusting screws 5 and sphere 6: used to level the regular polyhedron prism.

[0061] The specific composition and specific connection manner of each component are as follows:

[0062] The limiting member includes a cylinder 3, a stud 4, and a nut, and the nut is not shown in the figure;

[0063] The pedestal 2 is arranged above the base 1. A first groove adapted to the sphere 6 is opened at the center of the upper end surface of the base 1, and a second groove adapted to the sphere 6 is opened at the center of the lower end surface of the pedestal 2. The sphere 6 is placed in the first groove and the second groove, and the four adjusting screws 5 are screwed into the base 1 from bottom to top around the center of the sphere 6 and then connected to the pedestal 2;

[0064] Specifically, four first threaded holes are opened around the circumference of the sphere 6 on the base 1, and the central angle between two adjacent first threaded holes is 90°. Four second threaded holes coaxial with the first threaded holes are opened on the pedestal 2, and the adjusting screws 5 are screwed into the first threaded holes from bottom to top and then connected to the second threaded holes.

[0065] The cylinder 3 is installed at the center of the upper end surface of the pedestal 2, the stud 4 is connected to the cylinder 3, and the axes of the stud 4, the cylinder 3, and the sphere 6 coincide.

[0066] The depths of the first groove and the second groove are both smaller than the radius of the sphere 6.

[0067] Slip a regular polyhedral prism over the outer wall of the cylinder 3, and fix the regular polyhedral prism by threadedly connecting a nut to the stud 4. The regular polyhedral prism is a regular 24-sided prism or a regular 36-sided prism.

[0068] Install the entire structure on the workbench of the machine tool. The center of the workbench coincides with the axis of the sphere 6. Install the optoelectronic autocollimator on one side of the workbench, and then level the regular polyhedral prism. The specific steps are as follows:

[0069] Step 1: Rotate the workbench back and forth within its rotation range, and at the same time check whether the reading of the optoelectronic autocollimator in the horizontal direction remains within 10″ during the rotation of the workbench;

[0070] If it always remains within 10″, proceed to Step 3. If, when rotated to a certain angle, the reading exceeds 10″, stop the rotation of the workbench and proceed to Step 2;

[0071] Step 2: Level the regular polyhedral prism

[0072] Step 2.1: Adjust several adjusting screws 5 respectively, so that the adjusting screws 5 rotate upward or downward to level the regular polyhedral prism; make the reading of the optoelectronic autocollimator in the horizontal direction fall within 10″;

[0073] Step 2.2: Return to Step 1;

[0074] Step 3: End the leveling of the regular polyhedral prism and perform calibration of the rotation angle of the workbench.

[0075] This embodiment adopts a combined calibration method of a calibration device, including the following steps:

[0076] Step 1: Leveling

[0077] Install the optoelectronic autocollimator on one side of the workbench, fix the regular polyhedral prism at the center of the workbench, and level it so that the upper surface of the workbench is parallel to the upper surface of the regular polyhedral prism. At this time, the axis of the regular polyhedral prism coincides with the center line of the workbench;

[0078] The leveling of the regular polyhedral prism specifically includes the following steps:

[0079] Step 1.1: Rotate the workbench back and forth within its rotation range, and at the same time check whether the reading of the optoelectronic autocollimator in the horizontal direction remains within 10″ during the rotation of the workbench;

[0080] If it always remains within 10″, proceed to Step 3. If, when rotated to a certain angle, the reading exceeds 10″, stop the rotation of the workbench and proceed to Step 2;

[0081] Step 1.2: Level the regular polyhedral prism

[0082] Step 1.2.1: Adjust the position of the regular polyhedron prism so that the reading of the photoelectric autocollimator in the horizontal direction falls within 10″.

[0083] Step 1.2.2: Return to Step 1.

[0084] Step 1.3: Finish leveling the regular polyhedron prism and perform calibration of the rotation angle of the workbench.

[0085] Step 2: Return the workbench to the zero position

[0086] After leveling the regular polyhedron prism, rotate the workbench of the machine tool to 0°, and then zero the reading of the photoelectric autocollimator.

[0087] Step 3: Measurement

[0088] Step 3.1: Measure the error value at 15°:

[0089] The regular polyhedron prism in Step 1 has 24 faces. After completing Step 2, the photoelectric autocollimator finds the image and zeros it. Control the workbench to rotate 15°, and read the current reading of the photoelectric autocollimator to obtain the error value after the workbench rotates 15°.

[0090] Step 3.2: Measure the error value at 25°

[0091] Step 3.2.1: After completing Step 3.1, keep the workbench stationary at the current position, replace the 24-face regular polyhedron prism with a 36-face regular polyhedron prism, zero the reading of the photoelectric autocollimator again, continue to control the workbench to rotate 10°, and read the current reading of the photoelectric autocollimator to obtain the error value after the workbench rotates 10° again.

[0092] Step 3.2.2: Take the algebraic sum of the error value measured in Step 3.1 and the error value measured in Step 3.2.1 as the error value when the workbench rotates 25°.

[0093] Step 3.3: Measure the error value at 35°

[0094] Step 3.3.1: After completing Step 3.2, continue to rotate the workbench 10°, that is, the workbench rotates 35°, read the current reading of the photoelectric autocollimator to obtain the error value after the workbench rotates 10° for the second time.

[0095] Step 3.3.2: Take the algebraic sum of the error value measured in Step 3.2.2 and the error value measured in Step 3.3.1 as the error value when the workbench rotates 35°.

[0096] Step 3.4: Measure the error value at 10°

[0097] After completing step 3.3, rotate the workbench to 0°, the photo-electric auto-collimator finds the image and clears the reading. Then rotate the workbench by 10°, read the current reading of the photo-electric auto-collimator, and obtain the error value after the workbench rotates by 10°.

Claims

1. A method for calibrating the rotation angle of a machine tool worktable using the combination method, based on a device for calibrating the rotation angle of a machine tool worktable using the combination method, comprising a base (1), an optical autocollimator, a pedestal (2), a limiting member, a sphere (6), a regular polyhedron prism, and at least three adjusting screws (5); The base (1) is connected to the machine tool worktable; The optical autocollimator is installed on one side of the machine tool worktable and is used to cooperate with the regular polyhedron prism to calibrate the rotation angle of the machine tool worktable; The pedestal (2) is arranged parallel to the base (1) above; The sphere (6) is installed between the pedestal (2) and the base (1) and is located at the center position. At least three adjusting screws (5) are evenly distributed around the sphere (6). After the adjusting screws (5) are screwed into the base (1) from bottom to top, they are connected to the pedestal (2); The limiting member is installed on the pedestal (2) and is used to fix the regular polyhedron prism; It is characterized in that: It includes the following steps: Step 1: Leveling Install the optical autocollimator on one side of the worktable, fix the regular polyhedron prism at the center of the worktable, and level it so that the upper surface of the worktable is parallel to the upper surface of the regular polyhedron prism; Step 2: Return the worktable to the zero position After the regular polyhedron prism is leveled, rotate the machine tool worktable to 0°, and then zero the reading of the optical autocollimator; Step 3: Measurement Step 3.1: Measure the error value at 15°: The regular polyhedron prism in Step 1 has 24 faces. After completing Step 2, the optical autocollimator finds the image and zeros it. Control the worktable to rotate 15°, and read the current reading of the optical autocollimator to obtain the error value after the worktable rotates 15°; Step 3.2: Measure the error value at 25° Step 3.2.1: After completing Step 3.1, keep the worktable in the current position unchanged, replace the 24-face regular polyhedron prism with a 36-face regular polyhedron prism, zero the reading of the optical autocollimator again, continue to control the worktable to rotate 10°, and read the current reading of the optical autocollimator to obtain the error value after the worktable rotates 10° again; Step 3.2.2: Take the algebraic sum of the error value measured in Step 3.1 and the error value measured in Step 3.2.1 as the error value when the worktable rotates 25°; Step 3.3: Measure the error value at 35° Step 3.3.1: After completing Step 3.2, continue to rotate the worktable 10°, that is, the worktable rotates 35°. Read the current reading of the optical autocollimator to obtain the error value after the worktable rotates 10° for the second time; Step 3.3.2: Take the algebraic sum of the error value measured in Step 3.2.2 and the error value measured in Step 3.3.1 as the error value when the worktable rotates 35°; Step 3.4: Measure the error value at 10° After completing Step 3.3, rotate the worktable to 0°, the optical autocollimator finds the image and zeros it, rotate the worktable 10°, and read the current reading of the optical autocollimator to obtain the error value after the worktable rotates 10°; 2. The method for calibrating the rotation angle of a machine tool worktable using the combination method according to claim 1, characterized in that: The standard for leveling the regular polyhedral prism in Step 1 is that after multiple adjustments, the workbench rotates back and forth within its rotation range, and the error of the photo-electric auto-collimator in the horizontal direction always remains within 10″.

3. A method for calibrating the rotation angle of a machine tool workbench using the combination method according to claim 2, characterized in that: The leveling of the regular polyhedral prism in Step 1 includes the following steps: Step 1.1: Make the workbench rotate back and forth within its rotation range, and at the same time check whether the reading of the photo-electric auto-collimator in the horizontal direction remains within 10″ during the rotation of the workbench; If it always remains within 10″, proceed to Step 1.

3. If the reading exceeds 10″ when rotating to a certain angle, stop the rotation of the workbench and proceed to Step 1.2; Step 1.2: Level the regular polyhedral prism Step 1.2.1: Adjust the position of the regular polyhedral prism so that the reading of the photo-electric auto-collimator in the horizontal direction falls within 10″; Step 1.2.2: Return to Step 1; Step 1.3: End the leveling of the regular polyhedral prism and proceed to calibrate the rotation angle of the workbench.

4. A method for calibrating the rotation angle of a machine tool workbench using the combination method according to claim 3, characterized in that: The limiting member includes a cylinder (3), a stud (4) and a nut; The cylinder (3) is connected to the base (2), and the stud (4) is coaxially connected to the cylinder (3); The regular polyhedral prism is sleeved outside the cylinder (3); The nut is connected to the stud (4) and is used to fix the regular polyhedral prism; The sphere (6) coincides with the axis of the cylinder (3).

5. A method for calibrating the rotation angle of a machine tool workbench using the combination method according to claim 4, characterized in that: A first groove opening downward is provided on the upper end surface of the base (1), a second groove opening upward is provided on the lower end surface of the base (2), and the sphere (6) is arranged in the first groove and the second groove; the depths of the first groove and the second groove are both smaller than the radius of the sphere (6).

6. A method for calibrating the rotation angle of a machine tool workbench using the combination method according to claim 5, characterized in that: The number of the adjusting screws (5) is four.

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