Method for detecting and adjusting precision of M40-G main shaft and turn-milling unit

Abstract

The invention relates to an M40-G main shaft and turn-milling unit precision detection and adjustment method. The method comprises the following steps: detecting the parallelism of a Z1 axis and the parallelism of an auxiliary main shaft and the Z1 axis; the bus deviation of the S1 main shaft and the coaxiality of the S1 main shaft and the S2 auxiliary main shaft are detected; the deviation of the main shaft S1 and the coaxiality of the main shaft S1 and the auxiliary main shaft S2 are adjusted, and deflection compensation is conducted; detecting the perpendicularity between the X1 and the Z1 and the perpendicularity between the Y1 and the Z1 by using a self-made T-shaped detection tool; and carrying out bus detection and parameter compensation on the B1 shaft of the turn-milling unit. According to the method, the detection result is more reliable and can be quickly detected, the detection efficiency is improved, and deflection compensation is performed according to the size of a normally-machined workpiece; by means of the detection and adjustment method, systematic detection and adjustment are achieved, detection and adjustment can be rapidly and accurately carried out, high efficiency and simplicity are achieved, high-precision machining of the M40-G turn-milling combined machining center is guaranteed, and a stable foundation is laid.

Description

Technical Field

[0001] The invention belongs to the technical field of automobiles, and in particular relates to a method for detecting and adjusting the precision of an M40-G spindle and a turning and milling unit. Background Art

[0002] With the rapid development of the manufacturing industry today, the M40-G turning, drilling and milling compound machining center has played an increasingly important role in the automotive engine manufacturing industry due to its powerful machining capabilities, high machining accuracy and production efficiency. The M40-G turning, drilling and milling compound machining center covers 9 control axes, including 5 linkage axes, with a complex mechanical structure and high technological content. In the event of collision or long-term heavy cutting, in order to improve product quality and production efficiency, the spindle and turning and milling unit need to be regularly inspected and adjusted for mechanical accuracy. Due to the complexity and high precision of the machine tool, at the same time, it is necessary to ensure the production of high-quality products. Therefore, it is necessary to improve the machining accuracy of the equipment and quickly and accurately inspect and adjust the accuracy of the M40-G.

[0003] In the prior art, the precision detection and adjustment of the M40-G turning, drilling and milling composite machining center that has been used for a long time or collided is carried out in the following ways:

[0004] 1. The parallelism between the S2 sub-spindle and the Z1 axis is measured at a certain point using a mandrel, and the measurement result is single and has low reliability; the main axis generatrix is ​​statically tested, and static and dynamic errors cannot be eliminated;

[0005] 2. The coaxiality of the main spindle and the sub-spindle is detected by a single dial gauge. All spindle adjustments are performed using a single dial gauge, which is repeatedly detected, increasing the error and detection time. It is impossible to achieve rapid precision detection and does not take into account the deflection caused by machining longer workpieces;

[0006] 3. When adjusting the main axis and coaxiality, it is impossible to make regular adjustments and blind adjustments, which is difficult and difficult to adjust;

[0007] 4. It is impossible to accurately detect the verticality of the X1 axis, Y1 axis and Z1 axis of the milling unit. The B-axis accuracy detection does not take into account the two states of B-axis locking and loosening. If there is an out-of-tolerance adjustment method, the existing adjustment method is to disassemble the B-axis, which requires a lot of manpower and material resources.

[0008] The existing detection methods have no systematic detection in the face of multiple control axes and multiple linkage axes, which ultimately leads to large errors in the linkage of each axis during processing. The equipment cannot complete high-precision processing, seriously affecting product quality and making it impossible for the equipment to operate optimally. Summary of the invention

[0009] The purpose of the present invention is to provide a method for detecting and adjusting the precision of an M40-G spindle and a turning and milling unit, so as to solve the problem of precision excess caused by long-term use of the machine tool and the problem of systematic detection and adjustment of mechanical precision after a collision during processing, which can effectively improve the equipment precision and produce high-precision products.

[0010] The objective of the present invention is achieved through the following technical solutions:

[0011] A method for detecting and adjusting the precision of an M40-G spindle and a turning and milling unit comprises the following steps:

[0012] S1, check the parallelism of Z1 axis, S2 the parallelism of sub-spindle 13 and Z1 axis;

[0013] S2, detect the generatrix deviation of S1 spindle and the coaxiality of S1 spindle 12 and S2 sub-spindle 13;

[0014] S3, adjust the deviation of the main shaft S1, the coaxiality of the S1 main shaft 12 and the S2 secondary main shaft 13, and perform deflection compensation;

[0015] S4. Use a T-shaped detection tool to detect the verticality of the milling unit X1 and Z1, and the verticality of Y1 and Z1;

[0016] S5. Detection and parameter compensation of B1 axis of turning and milling unit.

[0017] Furthermore, step S1 specifically includes the following steps:

[0018] S11. Set the Z1 axis as the reference axis for the M40-G turning and milling compound machining center inspection and adjustment, and inspect the parallelism of the Z1 axis: by placing a pointer level on the Z1 axis, moving it forward and backward for multiple times by 2000mm, the measurement result shall not be greater than 0.01mm;

[0019] S12. Check the parallelism between the S2 sub-spindle 13 and the Z1 axis: fix the lever micrometer 1 on the S3 tool spindle, put the needle on the S2 sub-spindle 13, point the needle of the lever micrometer 1 to zero, and record the first position data e1; the S2 sub-spindle 13 moves 400mm along the Z4 direction; the S3 tool spindle of the turning and milling unit moves 400mm along the Z1 direction, and the reading of the lever micrometer 1 records the second position data e2, and the S2 sub-spindle 13 moves another 400mm along the Z4 direction; the S3 tool spindle of the turning and milling unit moves 400mm along the Z1 direction, and the reading of the lever micrometer 1 records the second position data e3; measure e4 and e5 in the same way, and compare e1, e2, e3, e4, and e5. The detection accuracy e=emax-emin.

[0020] Furthermore, in step S11, if the Z1 axis is out of tolerance during production, its guide rail and slider need to be adjusted for wear.

[0021] Furthermore, step S2 specifically includes the following steps:

[0022] S21, using Z1 axis as reference to detect the S1 main axis generatrix, and the coaxiality of S1 main axis 12 and S2 sub-spindle 13;

[0023] S22, perform S1 spindle busbar deviation detection;

[0024] S23, perform coaxiality detection of the S1 main spindle 12 and the S2 secondary spindle 13.

[0025] Furthermore, step S22, the spindle busbar deviation detection, is specifically as follows: remove the S1 spindle chuck, install the core rod 5HSK100, and fix the lever micrometer on the S3 tool spindle; the needle touches the top of the core rod, and the needle reading is recorded. The spindle rotates forward at 8rpm, and slowly moves Z1 from the near end 10 of the lever micrometer to the far end 11 of the lever micrometer, and calculates the deviation Dpositive; the spindle rotates backward at 8rpm, and Z1 calculates the deviation Dneg from the far end to the near end. Finally, the busbar accuracy D=(Dpositive+Dneg) / 2.

[0026] Furthermore, step S23, the coaxiality detection of S1 main spindle 12 and S2 sub-spindle 13 is specifically as follows: after the measurement of the main spindle generatrix deviation is completed, the S2 sub-spindle 13 chuck is removed, the mandrel HSK100 is installed, and two lever micrometers 1 of the same model are fixed on the S3 tool spindle, and the pointers of the two micrometers 1 are first brought into contact with the top of the left mandrel. At the beginning, the first lever micrometer 1 is at the proximal end of the left mandrel, and the second lever micrometer 1 is at the distal end of the left mandrel, and then the Z1 axis is slowly moved, and the two micrometers move at the same time until the lever micrometer 2 moves to the S2 sub-spindle 13 mandrel, and the numerical changes P1 and P2 of the first lever micrometer 1 and the second lever micrometer 1 are read, and the coaxiality = P1-P2.

[0027] Furthermore, step S3 specifically includes the following steps: the S1 spindle 12 is fixed to the bed of the machine tool by 10 fixing bolts 8, 5 on each side, and there are upper bolts 6 and lower bolts 7 on the left and right sides respectively, which are used for adjusting the S1 spindle generatrix deviation and the coaxiality of the S1 spindle and the S2 auxiliary spindle; a spirit level 4 is placed at the fixing position of the S1 spindle 12, which can reflect the adjustment amount when the upper bolts 6 and the lower bolts 7 are adjusted, and each adjustment is performed once. Step S2 generates a specific deviation value, which can be compared with the change in the spirit level 4 after the upper bolts 6 and the lower bolts 7 are adjusted, so as to complete the adjustment of the spindle S1 generatrix deviation and the coaxiality adjustment of the S1 spindle 12 and the S2 secondary spindle 13; when adjusting the coaxiality, the S1 spindle 12 needs to be 130.015mm higher than the S2 secondary spindle.

[0028] Further, step S4 specifically includes the following steps: using a homemade T-shaped gauge to detect the verticality of X1, Z1, and the verticality of Y1, Z1, the T-shaped homemade gauge 9 is clamped on the S1 spindle 12, the micrometer I 14 is fixed on the S3 tool spindle, the S1 spindle 12 is at 0°, the X1-turning, drilling and milling unit moves from top to bottom to move the micrometer on the T-shaped gauge detection surface, and the verticality of X1 and Z1 is measured, the S1 spindle 12 is rotated 90°, and the Y1-turning, drilling and milling unit moves back and forth to measure the verticality of Y1 and Z1.

[0029] Further, step S5 specifically includes the following steps: clamping a 300 mm long detection core rod 15 on the B1 axis, swinging the B1 axis to the left side at -90°, contacting the measuring micrometer II 16 pointer to the core rod surface and moving the Z1 axis to measure whether the busbar is deviated, and the measured value can reflect whether the B1 axis is -90°; after the measurement is completed, turn the B1 axis to +90°, and check the right side position accuracy at the right side position, and judge the overall deviation position of the B1 axis by measuring the values ​​of -90° and +90°; by modifying the compensation system parameter 34090 at the left side at -90°, the accuracy optimization is completed.

[0030] Furthermore, the B1 axis is locked and loosened and the operation is repeated more than 5 times.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. Establish the detection reference axis; the parallelism between the S2 sub-spindle and the Z1 axis is measured at multiple points, and the measurement results are calculated by formula, so the detection results are more reliable;

[0033] 2. Through the positive and negative rotation of the spindle, the M40-G turning, drilling and milling compound machining center is accurately tested. The main axis of the spindle is dynamically tested, and the spindle deviation D positive and D negative are measured. The deviation result is calculated by formula to eliminate the error. When testing the coaxiality of the main spindle and the sub-spindle, two lever micrometers are used for measurement at the same time. The deviation is accurately measured by the algorithm, the number of measurements is reduced, the results are quickly tested, the test efficiency is improved, and the deflection compensation is performed according to the size of the workpiece that is usually processed;

[0034] 3. When adjusting the main axis and coaxiality, place a level on the main axis base, summarize the rules through the level reaction, reduce the number of adjustments, improve equipment accuracy, and optimize product accuracy;

[0035] 4. Use self-made auxiliary inspection tools to solve the verticality detection of X1 axis, Y1 axis and Z1 axis. Dynamic detection is used for B axis. The detection result is calculated by calculation formula. Through B axis parameter compensation, precise adjustment is completed to maximize the equipment accuracy.

[0036] Through this detection and adjustment method, systematic detection and adjustment can be achieved, which can be carried out quickly and accurately. It is not only efficient and simple, but also ensures the high-precision processing of the M40-G turning and milling compound machining center and lays a stable foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 This is the structural diagram of the M40-G turning and milling compound machining center;

[0039] Figure 2 This is a schematic diagram of the parallelism detection between the S2 sub-spindle and the Z1 axis;

[0040] Figure 3 , Figure 3-1 It is a schematic diagram of S1 spindle detection, S1 spindle and S2 sub-spindle detection;

[0041] Figure 4 , Figure 4-1 This is a schematic diagram of the S1 spindle adjustment position;

[0042] Figure 5 , Figure 5-1 This is a diagram of a homemade T-type gauge and how to use it;

[0043] Figure 6 This is a schematic diagram of the B1 axis detection of the turning and milling unit;

[0044] Figure 7 It is a schematic diagram of the detection and adjustment process.

[0045] In the figure, 1. lever micrometer 2. S2 sub-spindle 3. adjusting shim 4. spirit level 5. core rod 6. upper bolt 7. lower bolt 8. fixing bolt 9. homemade inspection fixture 10. near end of lever micrometer 11. far end of lever micrometer 12. S1 main shaft 13. S2 sub-spindle 14. micrometer Ⅰ 15. inspection core rod 16. micrometer Ⅱ. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with embodiments:

[0047] The M40-G spindle and milling unit precision detection and adjustment method of the present invention comprises the following steps:

[0048] 1. Check the parallelism of the Z1 axis and the parallelism of the S2 sub-spindle 13 and the Z1 axis;

[0049] 2. Check the S1 spindle generatrix deviation and the coaxiality of the S1 spindle 12 and the S2 sub-spindle 13;

[0050] 3. Adjust the deviation of the main shaft S1, the coaxiality of the S1 main shaft 12 and the S2 secondary main shaft 13, and perform deflection compensation;

[0051] 4. Use the self-made T-shaped detection tool to detect the verticality of X1 and Z1, and the verticality of Y1 and Z1 of the milling unit;

[0052] 5. Detection and parameter compensation of B1 axis of turning and milling unit.

[0053] Each axis is composed of Figure 1 As shown, the left spindle box: S1-spindle, C1-rotation axis. Upper cross guide: X1-turning, drilling and milling unit moves up and down, Z1 turning, drilling and milling unit moves left and right. Turning, drilling and milling unit: Y1-turning, drilling and milling unit moves forward and backward, B1-tool axis swings left and right, S3-tool spindle. Right spindle box: S2-sub-spindle, C2-rotation axis, Z4-tail axis moves along the Z direction. Center frame: Z2-center frame moves along the Z direction.

[0054] The M40-G spindle and milling unit precision detection and adjustment method of the present invention specifically comprises the following steps:

[0055] S1. First, set the Z1 axis of the M40-G milling and turning machining center as the reference axis to detect the parallelism of the Z1 axis. Place the pointer level on the Z1 axis and move it 2000mm in the forward and reverse directions for multiple times. The measurement result is no greater than 0.01mm. The possibility of this axis exceeding the tolerance in production is small. If it exceeds the tolerance, its guide rail and slider need to be adjusted for grinding. At the same time, Figure 2 The parallelism of S2 sub-spindle 13 and Z1 axis is detected by the method. The detection method is: fix the lever micrometer 1 on the S3 tool spindle, put the needle on the S2 sub-spindle 13, point the needle of the lever micrometer 1 to zero, and record the first position data e1. Then, the S2 sub-spindle 13 moves 400mm in the Z4 direction. At the same time, the S3 tool spindle of the turning and milling unit moves 400mm in the Z1 direction. At this time, the reading of the lever micrometer 1 records the second position data e2, and the S2 sub-spindle 13 moves another 400mm in the Z4 direction. At the same time, the S3 tool spindle of the turning and milling unit moves 400mm in the Z1 direction, and the reading of the lever micrometer 1 records the second position data e3. Measure e4 and e5 in the same way, compare e1, e2, e3, e4, and e5, and the detection accuracy e=emax-emin.

[0056] The advantages of this step are: setting the Z1 axis as the reference axis for precision detection ensures that the spindle precision is adjusted to the optimal precision in the later stage; multi-point measurement method improves measurement accuracy, and accurate measurement results are calculated through formulas.

[0057] S2, with Z1 axis as reference, detect the S1 main axis busbar, and detect the coaxiality of S1 main axis 12 and S2 sub-spindle 13; the S1 main axis busbar deviation detection method is as follows Figure 3 As shown. Remove the S1 spindle chuck, install the mandrel 5HSK100, and fix the lever micrometer on the S3 tool spindle. At the same time, the needle touches the top of the mandrel, and the needle reading is recorded at this time. Then, the spindle rotates forward at 8rpm, and slowly moves Z1 from the near end 10 of the lever micrometer to the far end 11 of the lever micrometer, and calculates the deviation Dpositive. Similarly, the spindle rotates backward at 8rpm, and Z1 calculates the deviation Dneg from the far end to the near end. Finally, the busbar accuracy D = (Dpositive + Dneg) / 2. The coaxiality detection method of S1 spindle 12 and S2 sub-spindle 13 is as follows Figure 3-1 As shown. After the spindle generatrix deviation measurement is completed, remove the S2 sub-spindle chuck, install the mandrel HSK100, fix two lever micrometers 1 of the same model on the S3 tool spindle, first make the pointers of the two micrometers 1 contact the top of the left mandrel, at the beginning, the first lever micrometer 1 is at the near end of the left mandrel, and the second lever micrometer 1 is at the far end of the left mandrel, then slowly move the Z1 axis, and the two micrometers move at the same time until the lever micrometer 2 moves to the sub-spindle mandrel, read the numerical changes P1 and P2 of the first lever micrometer 1 and the second lever micrometer 1, and the coaxiality = P1-P2.

[0058] S3, Figure 4 , Figure 4-1 The diagram of the S1 spindle adjustment position is shown in Figure 1. The S1 spindle 12 is fixed to the machine bed by 10 fixing bolts 8, 5 on each side, to ensure the stability of the spindle during the machining process. There are upper bolts 6 and lower bolts 7 on the left and right sides, which are used to adjust the S1 spindle generatrix deviation and the coaxiality between the S1 spindle and the S2 auxiliary axis. When adjusting, Figure 4 As shown. A level 4 is placed at the fixed position of the S1 spindle 12. The main function of the level 4 is to reflect the amount of adjustment when adjusting the upper bolt 6 and the lower bolt 7. Step S2 is executed once for each adjustment. After the execution of step S2, a specific deviation value will be generated. In this way, the change amount of the level 4 after the upper bolt 6 and the lower bolt 7 are adjusted can be compared to summarize the change rules. By summarizing the change rules, quick and accurate adjustments can be made to quickly complete the adjustment of the main axis deviation of the spindle S1 and the coaxiality adjustment of the S1 spindle 12 and the S2 sub-spindle 13. At the same time, through the summary of daily production product precision detection, it is concluded that when adjusting the coaxiality, the S1 spindle 12 needs to be higher than the S2 sub-spindle 13 by 0.015mm, in order to compensate for the deflection caused by the length of the workpiece during the processing.

[0059] S4, using a self-made T-shaped gauge such as Figure 5 To test Figure 5-1 (a) The verticality of X1 and Z1, (b) The verticality of Y1 and Z1, Figure 5-1 (a) is a forward-looking device. The T-shaped self-made inspection fixture 9 is clamped on the S1 spindle 12. The micrometer I 14 is fixed on the S3 tool spindle. The S1 spindle 12 is at 0°. The X1-turning, drilling and milling unit moves from top to bottom to move the micrometer on the detection surface of the T-shaped inspection fixture to measure (a) the verticality of X1 and Z1. The S1 spindle 12 is rotated 90°, and the Y1-turning, drilling and milling unit moves back and forth to measure (b) the verticality of Y1 and Z1.

[0060] S5, such as Figure 6 As shown, Figure 1 B1-the axis of the tool axis swings left and right. The B1 axis plays a key role in the processing process. If the B1 axis deviates, it will cause the workpiece to exceed the tolerance during drilling, milling and turning. Clamp the 300mm long detection mandrel 15 on the B1 axis, and swing the B1 axis to the left -90° position. The B1 axis must be locked and loosened and repeated for more than 5 times. This process releases stress and ensures measurement accuracy. The pointer of the measuring micrometer II 16 contacts the surface of the mandrel and moves the Z1 axis to measure whether the generatrix has deviation. The measured value can reflect whether the B1 axis is -90°. In order to ensure the accuracy of the measurement, after the measurement is completed, the B1 axis is turned to +90°, and the right position is checked to check the right position accuracy. The overall deviation position of the B1 axis can be judged by the -90° and +90° measurement values. By modifying the compensation system parameter 34090 at the left -90° position, the accuracy optimization is completed. Because the tooth meshing of the B1 axis indexing positioning device has high indexing accuracy, it only needs to be set at position B1=-90°.

[0061] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for detecting and adjusting the precision of a M40-G spindle and a turning and milling unit, characterized in that: The following steps are involved: S1, check the parallelism of Z1 axis, S2 the parallelism of sub-spindle 13 and Z1 axis; S2, detect the generatrix deviation of S1 spindle and the coaxiality of S1 spindle 12 and S2 sub-spindle 13; S3, adjust the deviation of the main shaft S1, the coaxiality of the S1 main shaft 12 and the S2 secondary main shaft 13, and perform deflection compensation; S4. Use a T-shaped detection tool to detect the verticality of the milling unit X1 and Z1, and the verticality of Y1 and Z1; S5. Detection and parameter compensation of B1 axis of turning and milling unit.

2. The method for detecting and adjusting the precision of the M40-G spindle and the turning and milling unit according to claim 1 is characterized in that: Step S1 specifically includes the following steps: S11. Set the Z1 axis as the reference axis for the M40-G turning and milling compound machining center inspection and adjustment, and inspect the parallelism of the Z1 axis: by placing a pointer level on the Z1 axis, moving it forward and backward for multiple times by 2000mm, the measurement result shall not be greater than 0.01mm; S12. Check the parallelism between the S2 sub-spindle 13 and the Z1 axis: fix the lever micrometer 1 on the S3 tool spindle, put the needle on the S2 sub-spindle 13, point the needle of the lever micrometer 1 to zero, and record the first position data e1; the S2 sub-spindle 13 moves 400mm along the Z4 direction; the S3 tool spindle of the turning and milling unit moves 400mm along the Z1 direction, and the reading of the lever micrometer 1 records the second position data e2, and the S2 sub-spindle 13 moves another 400mm along the Z4 direction; the S3 tool spindle of the turning and milling unit moves 400mm along the Z1 direction, and the reading of the lever micrometer 1 records the second position data e3; measure e4 and e5 in the same way, and compare e1, e2, e3, e4, and e5. The detection accuracy e=emax-emin.

3. The method for detecting and adjusting the precision of the M40-G spindle and the turning and milling unit according to claim 2 is characterized in that: Step S11, if the Z1 axis is out of tolerance during production, its guide rail and slider need to be adjusted for wear.

4. The method for detecting and adjusting the precision of the M40-G spindle and milling unit according to claim 1 is characterized in that: Step S2 specifically includes the following steps: S21, using Z1 axis as reference to detect the S1 main axis generatrix, and the coaxiality of S1 main axis 12 and S2 sub-spindle 13; S22, perform S1 spindle busbar deviation detection; S23, perform coaxiality detection of the S1 main spindle 12 and the S2 secondary spindle 13.

5. The method for detecting and adjusting the precision of the M40-G spindle and the turning and milling unit according to claim 4 is characterized in that: Step S22, spindle busbar deviation detection, specifically: remove the S1 spindle chuck, install the core rod 5HSK100, fix the lever micrometer on the S3 tool spindle; the needle touches the top of the core rod, record the needle reading, the spindle rotates forward at 8rpm, slowly move Z1 from the near end 10 of the lever micrometer to the far end 11 of the lever micrometer, and calculate the deviation Dpositive; the spindle rotates backward at 8rpm, and Z1 calculates the deviation Dneg from the far end to the near end. Finally, the busbar accuracy D=(Dpositive+Dneg) / 2.

6. The method for detecting and adjusting the precision of the M40-G spindle and milling unit according to claim 4 is characterized in that: Step S23, coaxiality detection of S1 main spindle 12 and S2 sub-spindle 13, specifically: after the spindle generatrix deviation measurement is completed, remove the S2 sub-spindle 13 chuck, install the core rod HSK100, and fix two lever micrometers 1 of the same model on the S3 tool spindle, first make the pointers of the two micrometers 1 contact with the top of the left core rod, at the beginning, the first lever micrometer 1 is at the proximal end of the left core rod, and the second lever micrometer 1 is at the distal end of the left core rod, and then slowly move the Z1 axis, the two micrometers will move at the same time until the lever micrometer 2 moves to the S2 sub-spindle 13 core rod, read the numerical change values ​​P1 and P2 of the first lever micrometer 1 and the second lever micrometer 1, coaxiality = P1-P2.

7. The method for detecting and adjusting the precision of the M40-G spindle and milling unit according to claim 1 is characterized in that: Step S3 specifically includes the following steps: the S1 spindle 12 is fixed to the bed of the machine tool by 10 fixing bolts 8, 5 on each side, and there are upper bolts 6 and lower bolts 7 on the left and right sides respectively, which are used for adjusting the S1 spindle generatrix deviation and the coaxiality of the S1 spindle and the S2 auxiliary spindle; a spirit level 4 is placed at the fixing position of the S1 spindle 12, which can reflect the adjustment amount when the upper bolts 6 and the lower bolts 7 are adjusted, and step S2 is executed once for each adjustment to generate a specific deviation value, which can be compared with the change in the spirit level 4 after the upper bolts 6 and the lower bolts 7 are adjusted, so as to complete the adjustment of the spindle S1 generatrix deviation and the coaxiality adjustment of the S1 spindle 12 and the S2 secondary spindle 13; when adjusting the coaxiality, the S1 spindle 12 needs to be 130.015mm higher than the S2 secondary spindle.

8. The method for detecting and adjusting the precision of the M40-G spindle and milling unit according to claim 1 is characterized in that: Step S4 specifically includes the following steps: using a homemade T-shaped gauge to detect the verticality of X1, Z1, and the verticality of Y1, Z1, the T-shaped homemade gauge 9 is clamped on the S1 spindle 12, the micrometer I 14 is fixed on the S3 tool spindle, the S1 spindle 12 is at 0°, the X1-turning, drilling and milling unit moves from top to bottom to move the micrometer on the T-shaped gauge detection surface, and the verticality of X1 and Z1 is measured, the S1 spindle 12 is rotated 90°, and the Y1-turning, drilling and milling unit moves back and forth to measure the verticality of Y1 and Z1.

9. The method for detecting and adjusting the precision of the M40-G spindle and milling unit according to claim 1 is characterized in that: Step S5 specifically includes the following steps: clamp a 300mm long detection core rod 15 on the B1 axis, swing the B1 axis to the left side -90° position, and move the pointer of the measuring micrometer II 16 to contact the core rod surface and move the Z1 axis to measure whether the busbar is deviated. The measured value can reflect whether the B1 axis is -90°; after the measurement is completed, turn the B1 axis to +90°, and check the right side position accuracy at the right side position. The overall deviation position of the B1 axis is determined by the -90° and +90° measurement values; and the compensation system parameter 34090 is modified at the left side -90° position to complete the accuracy optimization.

10. The method for detecting and adjusting the precision of the M40-G spindle and milling unit according to claim 9 is characterized in that: Tighten and loosen the B1 axis and repeat the operation more than 5 times.

Images