A method for debugging an online measurement system of an intelligent vertical turning machine tool

Abstract

The application discloses a kind of intelligent vertical turning machine tool online measurement system debugging method, belongs to high-end intelligent machining equipment debugging technical field, in order to solve the problem that existing intelligent vertical turning machine tool does not have the function of online debugging of the measurement system of machine tool, leading to the problem of long auxiliary machining time of machine tool, low machining efficiency and large machining error, the debugging method is measured first The coaxiality of the axis of the positioning center hole of the tool installed in the center of the ram of the machine tool and the center line of the rotation of the worktable;Then, the coordinate position calibration of the tool measurement system and the workpiece measurement system is carried out using the calibration gauge installed on the ram, and the calibrated coordinate position is used as the reference coordinate system for subsequent tool measurement and workpiece measurement.

Description

Technical Field

[0001] This invention belongs to the field of high-end intelligent machining equipment debugging technology, specifically relating to a debugging method for an online measurement system of an intelligent vertical turning machine tool. Background Technology

[0002] Currently, most CNC vertical lathe machining processes rely on manual tool setting and workpiece measurement. This requires multiple machine stops for manual tool setting and workpiece measurement, depending on the workpiece shape and machining steps. This results in prolonged auxiliary machining time and low machining efficiency. Furthermore, the varying skill levels of operators during manual tool setting and workpiece dimensional measurement lead to significant errors between the measurement results and the actual values, potentially resulting in defective parts. This is especially problematic for large parts, which have long production cycles and high costs, as defective parts can cause substantial losses for the company.

[0003] With the improvement of my country's machine tool manufacturing level, my country has made great progress in the research and development of intelligent vertical turning machine tools. However, existing intelligent vertical turning machine tools still lack the function of online debugging of the machine tool's measurement system. This results in the aforementioned defects in the actual use of intelligent vertical turning machine tools, affecting both the machining accuracy and the machining efficiency. Therefore, developing an online measurement system debugging method for intelligent vertical turning machine tools to improve the automated cutting of the machine tool and reduce the machining errors caused by manual intervention is in line with practical needs. Summary of the Invention

[0004] To address the problem that existing intelligent vertical turning machine tools lack the function of online debugging of the machine tool's measurement system, resulting in long auxiliary processing time, low processing efficiency, and large processing errors, this invention provides an online measurement system debugging method for intelligent vertical turning machine tools.

[0005] A debugging method for an online measurement system of an intelligent vertical turning machine tool, the method being implemented through the following steps:

[0006] Step 1: Measure the coaxiality between the axis of the positioning center hole for mounting the tool at the center of the machine tool slide and the center line of the worktable rotation. Ensure that the coaxiality between the two meets the debugging requirements, record the measured values, and use them as the X-axis reference zero point position for subsequent machine tool calibration.

[0007] Step 2: Based on the self-turning machining of the worktable end face and radial direction by the machine tool, install the calibration fixture at the lower end of the slide, and use the upper end face of the worktable as the zero point of the Z-axis coordinate calibration and the rotation axis of the worktable as the zero point of the X-axis coordinate calibration to calibrate the coordinate positions of the center and bottom of the calibration fixture in the existing coordinate system of the machine tool.

[0008] Step 3: Use the calibration fixture installed in Step 2 to calibrate the coordinate positions of the machine tool tool measurement system and the machine tool workpiece measurement system, and record the calibration data;

[0009] Step 4: After completing the above calibration process, control the machine tool's Z-axis to return to the reference point. The machine tool's Z-axis coordinate value displayed by the CNC system plus the length of a section of the calibration fixture from the bottom of the slide is the distance from the bottom of the machine tool's slide to the top of the worktable. At this time, the machine tool's Z-axis coordinate is the zero point coordinate of the tool installation. When the slide is replaced with a workpiece probe or turning tool, simply input its length into the tool list of the CNC system. The CNC system can automatically measure and process the tool or probe according to the calibration program.

[0010] Furthermore, in step 1, the coaxiality between the axis of the positioning center hole for mounting the tool at the center of the machine tool slide and the center line of the worktable rotation is achieved using a dial indicator. First, the magnetic base of the dial indicator is attached to the machine tool worktable. After the dial indicator is fixed, the pointer of the dial indicator is pointed to the inner wall of the center of the lower end of slide 1, and the dial indicator is zeroed. After the dial indicator pointer is zeroed, the worktable is slowly rotated, and the reading of the dial indicator is read. The coordinate positions of the machine tool in the X and Y directions are continuously adjusted so that the reading of the dial indicator remains unchanged on both sides of the X-axis direction and the reading of the dial indicator is ≤0.01mm on both sides of the Y-axis direction. At this time, the horizontal coordinate of the machine tool slide is recorded. This coordinate is the X-axis reference zero point position for subsequent machine tool calibration.

[0011] Furthermore, the calibration fixture in step 2 consists of two parts: a mounting base and a lower inspection bar. The top of the mounting base is correspondingly fitted with the positioning center hole at the center of the bottom of the slide block. The mounting base is inserted into the positioning center hole at the bottom of the slide block and is detachably connected to the slide block. The top of the lower inspection bar is inserted into the bottom of the mounting base, and the axis of the mounting base, the axis of the lower inspection bar, and the axis of the slide block 1 are collinear. The lower inspection bar is detachably connected to the mounting base.

[0012] Furthermore, a connecting hole is machined at the center of the bottom end of the mounting base. There are two set screw threaded holes equidistantly spaced along the circumference on the inner wall of the connecting hole. A set screw is inserted into each set screw threaded hole, and each set screw is threadedly connected to the mounting base. The top end of the lower inspection bar is provided with a connecting post, and the connecting post is configured to cooperate with the connecting hole at the bottom end of the mounting base. The connecting post at the top end of the lower inspection bar is inserted into the connecting hole at the bottom end of the mounting base, and the mounting base is detachably connected to the lower inspection bar through two set screws.

[0013] Furthermore, a measuring column is provided at the center of the bottom end of the lower test bar, and the bottom end of the measuring column is the first measuring surface, the front side of the measuring column is the second measuring surface, the left side of the measuring column is the third measuring surface, and the right side of the measuring column is the fourth measuring surface.

[0014] Furthermore, in step 3, when calibrating the position of the machine tool measuring system, a tool probe calibration block is required. The tool probe calibration block is installed below the right crossbeam of the machine tool. The process of calibrating the position of the machine tool measuring system using the calibration fixture and the tool probe calibration block is as follows: Manually start the machine tool so that the fourth, first, and third measuring surfaces in the measuring column at the bottom of the calibration fixture contact the corresponding surfaces of the tool probe calibration block in the (X+, Z-, X-) directions, respectively. During the contact process, slowly adjust with the handwheel. After the probe signal is triggered, stop the movement of the machine tool axis and record the corresponding coordinate values. At the same time, according to the X1 and X2 dimensions of the square head at the bottom of the calibration fixture, perform coordinate conversion, that is, use the center position of the slide block for coordinate calibration, and the positional relationship between the tool probe calibration block and the zero point of the machine tool worktable can be obtained.

[0015] Furthermore, in step 3, when calibrating the position of the machine tool workpiece measurement system, a workpiece probe calibration block is required. The workpiece probe calibration block is installed below the left crossbeam of the machine tool. The process of calibrating the position of the machine tool workpiece measurement system using the calibration fixture and the workpiece probe calibration block is as follows: The machine tool is manually started so that the fourth measuring surface, the first measuring surface, and the third measuring surface in the measuring column at the bottom of the calibration fixture are respectively aligned with the surfaces of the workpiece probe calibration block in the (X+, Z-, X-) directions. The gap values ​​between the center of the slide block and each surface of the calibration block are measured using gauge blocks. At the same time, coordinate conversion is performed according to the X1 and X2 dimensions of the square head at the bottom of the calibration fixture. That is, coordinate calibration is performed using the center position of the slide block. The positional relationship between the workpiece probe calibration block and the zero point of the machine tool worktable can be obtained.

[0016] The beneficial effects of this application compared to the prior art are:

[0017] This application proposes an online measurement system debugging method for an intelligent vertical turning machine tool. Based on the structural layout characteristics of the intelligent vertical turning machine tool, an innovative method is adopted to calibrate the tool measurement system and the workpiece measurement system in the machine tool coordinate system according to a unified coordinate zero point. After calibration, the machine tool can automatically measure the dimensions of the workpiece, automatically measure the tool, and automatically perform machining, realizing the machining process without human intervention. By using calibration fixtures to calibrate the tool measurement system and the workpiece measurement system, it is ensured that the initial positioning of the tool change point is consistent each time the machine tool automatically changes tools, which establishes an accurate positioning basis for automatic tool setting. This allows the machine tool to accurately set tools based on the pre-calibrated position and tool length during subsequent automatic tool setting, avoiding the problems of long machining time, low machining efficiency, and large machining errors caused by manual measurement.

[0018] The online measurement system debugging method of the intelligent vertical turning machine tool involved in this application has been tested in relevant prototypes. After debugging, the machine tool can meet its automatic machining function, and the machining accuracy and machining efficiency are significantly improved, which can realize automatic machining without human intervention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main view for measuring the coaxiality between the axis of the positioning center hole for mounting the tool at the center of the machine tool slide and the center line of the worktable rotation in step 1 of this application.

[0020] Figure 2 This is a side view schematic diagram of the measurement of the coaxiality between the axis of the positioning center hole for mounting the tool at the center of the machine tool slide and the center line of the worktable rotation in step 1 of this application.

[0021] Figure 3 This is a schematic diagram of the calibration fixture described in this application;

[0022] Figure 4 This is a bottom view of the calibration fixture described in this application;

[0023] Figure 5 This is a front view schematic diagram of the calibration of the machine tool tool measurement system and the machine tool workpiece measurement system using a calibration fixture in step 3 of this application;

[0024] Figure 6 This is a side view of step 3 of this application, in which the machine tool tool measurement system and the machine tool workpiece measurement system are calibrated using a calibration fixture.

[0025] Figure 7 This is a schematic diagram of the movement of the calibration fixture when performing position calibration of the machine tool measuring system using the calibration fixture in this application;

[0026] Figure 8 This is a schematic diagram of the movement of the calibration fixture when performing position calibration on the machine tool workpiece measurement system using the calibration fixture in this application;

[0027] Figure 9 This is a schematic diagram showing the positional relationship of the online measurement system of the machine tool calibrated under the machine tool coordinate system in this application;

[0028] Figure 10 This is a schematic diagram of the probe calibration of the online workpiece measurement system in the machine tool described in this application;

[0029] Figure 11 This is a schematic diagram of online workpiece measurement in the machine tool described in this application;

[0030] Figure 12 This is a schematic diagram of online measurement of the external turning tool in the machine tool described in this application;

[0031] Figure 13 This is a schematic diagram of online measurement of the internal bore cutting tool in the machine tool described in this application;

[0032] Figure 14 This is a schematic diagram of the machining process of the machine tool described in this application;

[0033] In the diagram, 1 is the slide block, 2 is the dial indicator, 3 is the worktable, 4 is the mounting base, 5 is the lower end inspection bar, 6 is the workpiece probe calibration block, 7 is the tool probe calibration block, 8 is the workpiece probe, 9 is the external turning tool, 10 is the internal turning tool, 11 is the workpiece, and 12 is the gauge block. Detailed Implementation

[0034] Specific Implementation Method 1: Refer to the appendix of the instruction manual. Figure 1 To be continued Figure 14 This embodiment provides a method for debugging an online measurement system for an intelligent vertical turning machine tool, which is implemented through the following steps:

[0035] Step 1: Measure the coaxiality between the axis of the positioning center hole for mounting the tool at the center of the machine tool slide and the center line of the worktable rotation. Ensure that the coaxiality between the two meets the debugging requirements, record the measured values, and use them as the X-axis reference zero point position for subsequent machine tool calibration.

[0036] Step 2: Based on the self-turning machining of the worktable end face and radial direction by the machine tool, install the calibration fixture at the lower end of the slide, and use the upper end face of the worktable as the zero point of the Z-axis coordinate calibration and the rotation axis of the worktable as the zero point of the X-axis coordinate calibration to calibrate the coordinate positions of the center and bottom of the calibration fixture in the existing coordinate system of the machine tool.

[0037] Step 3: Use the calibration fixture installed in Step 2 to calibrate the coordinate positions of the machine tool tool measurement system and the machine tool workpiece measurement system, and record the calibration data;

[0038] Step 4: After completing the above calibration, move the machine tool's Z-axis to the machine tool's Z-axis reference point, which is the highest point of the slide moving towards the machine tool. At this time, the machine tool's Z-axis coordinate value displayed by the CNC system plus the length L value of the section from the lower end face of the slide to the bottom of the special calibration fixture is the distance from the lower end face of the slide to the upper end face of the worktable. At this time, the machine tool's Z-axis coordinate is the Z-axis zero point coordinate of the tool installation. When removing the calibration fixture and replacing it with a probe or tool, use the center of the slide and the lower end face of the slide as the reference, measure with a tape measure, and input the corresponding values ​​into the tool list of the CNC system. The machine tool can automatically complete the tool calibration or probe calibration according to the program.

[0039] Specific Implementation Method Two: Refer to the appendix of the instruction manual Figure 1 To be continued Figure 14 This embodiment further defines step 1 of specific embodiment one. In step 1, the coaxiality between the axis of the positioning center hole for the tool mounting on the machine tool slide and the center line of the worktable rotation is achieved using a dial indicator 2. First, the magnetic base of the dial indicator 2 is attached to the machine tool worktable 3. After the dial indicator 2 is fixed, its pointer is pointed to the inner wall of the center of the lower end of the slide 1, and the dial indicator 2 is zeroed. After the dial indicator 2 pointer is zeroed, the worktable 3 is slowly rotated, and the reading of the dial indicator 2 is read. The coordinate positions of the machine tool in the X and Y directions are continuously adjusted so that the dial indicator readings remain constant on both sides of the X-axis and ≤0.01mm on both sides of the Y-axis. At this point, the horizontal coordinate of the machine tool slide is recorded; this coordinate is the X-axis reference zero point position for subsequent machine tool calibration. Other methods and steps are the same as in specific embodiment one.

[0040] In this embodiment, during the measurement of the coaxiality between the axis of the positioning center hole for mounting the tool at the center of the machine tool slide and the center line of the worktable rotation using dial indicator 2, the concentric position of the two in the X direction is found when moving the X-axis position. As for the concentric position of the two in the Y direction, it is necessary to adjust the dimensions of the machine tool parts in this direction (thickness of the tool holder slide or front and rear position of the column) during the machine tool assembly and debugging stage to ensure that the tool mounting center and the worktable center are concentric in the Y direction.

[0041] Specific Implementation Method Three: Refer to the appendix of the instruction manual Figure 1 To be continued Figure 14This embodiment further defines step 2 of specific embodiment two. The calibration fixture in step 2 consists of a mounting base 4 and a lower inspection bar 5. The top of the mounting base 4 is correspondingly fitted with the positioning center hole at the bottom center of the slide block 1. The mounting base 4 is inserted into the positioning center hole at the bottom of the slide block 1 and is detachably connected to the slide block 1. The top of the lower inspection bar 5 is inserted into the bottom end of the mounting base 4, and the axes of the mounting base 4, the lower inspection bar 5, and the slide block 1 are collinear. The lower inspection bar 5 is detachably connected to the mounting base 4. Other method steps are the same as in specific embodiment two.

[0042] Specific Implementation Method Four: Refer to the appendix of the instruction manual Figure 1 To be continued Figure 14 This embodiment further defines the mounting base 4 in Specific Embodiment Three. The mounting base 4 has a connecting hole machined at its bottom center. Two set screw threaded holes are equidistant along the circumferential direction on the inner wall of the connecting hole. A set screw is inserted into each set screw threaded hole, and each set screw is threadedly connected to the mounting base 4. The top end of the lower inspection rod 5 has a connecting post, which mates with the connecting hole at the bottom of the mounting base 4. The connecting post at the top of the lower inspection rod 5 is inserted into the connecting hole at the bottom of the mounting base 4, and the mounting base 4 is detachably connected to the lower inspection rod 5 via two set screws. Other method steps are the same as in Specific Embodiment Two.

[0043] Specific Implementation Method Five: Refer to the appendix of the instruction manual Figure 1 To be continued Figure 14 This embodiment further defines the lower inspection bar 5 in Specific Embodiment 1. A measuring column is located at the center of the bottom end of the lower inspection bar 5, with the bottom end of the measuring column forming the first measuring surface F, the front side of the measuring column forming the second measuring surface E, the left side of the measuring column forming the third measuring surface G, and the right side of the measuring column forming the fourth measuring surface H. Other method steps are the same as in Specific Embodiment 1.

[0044] Referring to the descriptions in embodiments three to five, the calibration fixture described in this application consists of two parts: an upper mounting base 4 and a lower inspection bar 5. The upper end of the upper mounting base 4 is identical to the machine tool tool mounting interface, allowing it to be installed on the lower end of the machine tool ram in a tool mounting manner, thus achieving positioning and locking of the upper mounting base. The lower end of the upper mounting base 4 has a mounting interface with the lower inspection bar 5, and this interface allows the lower inspection bar 5 to rotate circumferentially, meeting its basic calibration requirements. The lower inspection bar 5 has a round-square structure at its bottom, which enables it to perform coordinate calibration. The dimensions of the special calibration fixture are measured on a coordinate measuring machine after machining and assembly. During the calibration process, coordinate offset calculations are performed based on the measured dimensions.

[0045] During the process of installing the calibration fixture under the machine tool slide, it is necessary to use a dial indicator to check the fixture's position at the center of the worktable and the parallelism between the E surface and the X-axis of the machine tool. The lower end of the upper mounting base 4 has an interface with the lower inspection bar 5, which is fixed by a set screw. This interface allows the lower inspection bar 5 to rotate around the circumference, which is convenient for adjusting the concentricity and the parallelism and perpendicularity of each surface to the X-axis of the machine tool. After checking the accuracy, the set screw is locked. At the same time, the distance K between the special calibration fixture and the worktable is measured. This can be done by using a gauge block or other methods. This distance K is then converted to coordinates to calculate the coordinate reference zero point of the lower end face of the special calibration fixture on the end face of the worktable.

[0046] During the coordinate position calibration of the tool measuring system and workpiece measuring system using a calibration fixture, the coordinates of the tool measuring probe in the three directions (X+, X-, Z-) are calibrated using the straight surface and bottom surface of the square structure below the calibration fixture. The calibration reference is the upper end face of the worktable and the rotation axis of the worktable, obtaining three relative coordinate values ​​of the tool measuring probe. The same method is used to calibrate the coordinates of the calibration block of the workpiece measuring system in the three directions (X+, X-, Z-), with the calibration reference being the upper end face of the worktable and the rotation axis of the worktable. This yields three relative coordinate values ​​of the workpiece measuring system calibration block. The coordinates of the lower end face of the machine tool slide relative to the upper end face of the worktable when the machine tool slide is at the Z-axis reference point are then determined. These coordinates are the installation zero point of the tool or probe. By simply inputting its length into the tool list of the CNC system, the CNC system can automatically measure and process the tool or probe according to the calibration program.

[0047] Specific Implementation Method Six: Refer to the appendix of the instruction manual Figure 1 To be continued Figure 14 This embodiment further defines step 3 in specific embodiment one. In step 3, when calibrating the machine tool measuring system, a tool probe calibration block 7 is used. The tool probe calibration block 7 is installed below the right crossbeam of the machine tool. The process of calibrating the machine tool measuring system using the calibration fixture and the tool probe calibration block 7 is as follows: The machine tool is manually started so that the fourth measuring surface H, the first measuring surface F, and the third measuring surface G in the measuring column at the bottom of the calibration fixture contact the corresponding surfaces of the tool probe calibration block 7 in the X+, Z-, and X- directions, respectively. During contact, the handwheel is used for slow adjustment. After the probe signal is triggered, the movement of the machine tool axis is stopped, and the corresponding coordinate values ​​are recorded. Simultaneously, coordinate conversion is performed according to the X1 and X2 dimensions of the square head at the bottom of the calibration fixture, i.e., coordinate calibration is performed using the center position of the slide block. This allows the determination of the positional relationship between the tool probe calibration block 7 and the zero point of the machine tool worktable. Other methods and steps are the same as in specific embodiment one.

[0048] Specific Implementation Method Seven: Refer to the appendix of the instruction manual Figure 1 To be continued Figure 14This embodiment further defines step 3 in specific embodiment one. In step 3, when calibrating the position of the machine tool workpiece measurement system, a workpiece probe calibration block 6 is required. The workpiece probe calibration block 6 is installed below the left crossbeam of the machine tool. The process of calibrating the position of the machine tool workpiece measurement system using the calibration fixture and the workpiece probe calibration block 6 is as follows: The machine tool is manually started so that the fourth measuring surface H, the first measuring surface F, and the third measuring surface G in the measuring column at the bottom of the calibration fixture correspond to the surfaces of the workpiece probe calibration block 6 in the (X+, Z-, X-) directions, respectively. The gap values ​​between the center of the slide block and each surface of the calibration block are measured using gauge blocks. Simultaneously, coordinate conversion is performed according to the X1 and X2 dimensions of the square head at the bottom of the calibration fixture, i.e., coordinate calibration is performed using the center position of the slide block. This allows the determination of the positional relationship between the workpiece probe calibration block 6 and the zero point of the machine tool worktable. Other methods and steps are the same as in specific embodiment one.

[0049] In conjunction with the explanations of specific implementation methods six and seven, the side of the workpiece measuring probe calibration block 6 is rigid. It is necessary to use gauge blocks to determine the gap values ​​between the center of the slide block and each surface of the calibration block, and to perform coordinate conversion. That is, the coordinate calibration is performed using the center position of the slide block, and the positional relationship between the workpiece measuring probe calibration block and the zero point of the machine tool table can be obtained.

[0050] The workpiece probe 8 of the machine tool is generally installed in the tool magazine. It can be automatically gripped by the slide within the tool magazine via program control. When using the workpiece probe for the first time, the center of the slide needs to be moved to the X0 coordinate of the worktable center. Then, a dial indicator is used for inspection. The magnetic base at the bottom of the dial indicator is attached to the worktable, and the pointer points to the outer circle of the sapphire head at the bottom of the workpiece probe. The worktable is rotated to check the concentricity of the outer circle of the sapphire head of the workpiece probe with the axis of rotation of the worktable. The position of the probe in the X and Y planes can also be finely adjusted to meet the concentricity requirements. Each time the workpiece measuring probe is used, it must be followed... Figure 10 The probe and workpiece probe calibration block 6 are calibrated as shown to complete the calibration of the probe's position in the machine tool coordinate system. This is done to eliminate accuracy variations caused by positioning errors resulting from repeated installation of the probe and machine tool slide; therefore, recalibration is required each time. After calibration, the workpiece can be measured. Similarly, the workpiece should have approximate dimensions after being mounted on the machine tool, such as height and diameter. The probe can be used to calculate and measure the workpiece dimensions based on the coordinate position.

[0051] When calibrating the probe calibration block 6 using the lower inspection bar 5 and the gauge block, first select a high-precision gauge block of standard size, and make one side of the gauge block fit tightly against the surface to be measured on 6. Then, by slowly moving the X-axis of the machine tool, the lower inspection bar 5 is slowly moved closer to the outer side of the gauge block. During the approach process, the gauge block is continuously and gently pushed by hand to slide, so that the slider can move slightly along the measuring surface on 6 until the gauge block can no longer be pushed. At this time, the dimensions on the dimension chain are converted, the tool mounting center is offset to the surface to be measured, and the coordinates are recorded.

[0052] After each tool change, a tool setting measurement is also required. This step is the same as the measurement method for workpiece probe 8 mentioned above. Depending on the tool type, the commonly used measurement methods for external turning tools and internal turning tools are as follows: Figure 12 and Figure 13 As shown, it is worth noting that the calibration directions of the internal hole machining tool and the external diameter machining tool are opposite.

[0053] The present invention has been disclosed above with preferred embodiments, but it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention. However, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A debugging method for an online measurement system of an intelligent vertical turning machine tool, characterized in that: The method is implemented through the following steps: Step 1: Measure the coaxiality between the axis of the positioning center hole of the tool mounting center on the machine tool slide (1) and the center line of the worktable rotation, and ensure that the coaxiality between the two meets the debugging requirements. Record the measured value as the zero point position of the X-axis coordinate calibration for subsequent machine tool calibration. In step 1, the coaxiality between the axis of the positioning center hole of the tool mounting center of the machine tool slide (1) and the center line of the worktable rotation is achieved by using a dial indicator (2). First, the magnetic base of the dial indicator (2) is attached to the machine tool worktable (3). After the dial indicator (2) is fixed, the pointer of the dial indicator (2) is pointed to the inner wall of the bottom center of the slide (1), and the dial indicator (2) is zeroed. After the pointer of the dial indicator (2) is zeroed, the worktable (3) is slowly rotated, the reading of the dial indicator (2) is read, and the coordinate position of the machine tool in the X direction and the coordinate position in the Y direction are continuously adjusted so that the reading of the dial indicator remains unchanged on both sides of the X-axis direction and the reading of the dial indicator on both sides of the Y direction is ≤0.01mm. At this time, the horizontal coordinate of the machine tool slide (1) is recorded. This coordinate is the zero point position of the X-axis coordinate calibration of the subsequent machine tool calibration. Step 2: Based on the self-turning machining of the end face and radial direction of the worktable by the machine tool, the calibration fixture is installed at the lower end of the slide (1), and the upper end face of the worktable is used as the zero point of the Z-axis coordinate calibration, and the rotation axis of the worktable is used as the zero point of the X-axis coordinate calibration. The coordinate positions of the center and bottom of the calibration fixture are calibrated in the existing coordinate system of the machine tool. Step 3: Use the calibration fixture installed in Step 2 to calibrate the coordinate positions of the machine tool tool measurement system and the machine tool workpiece measurement system, and record the calibration data; Step 4: After completing the above calibration process, control the machine tool Z-axis to return to the reference point. The machine tool Z-axis coordinate value displayed by the CNC system plus the length of the calibration fixture from the lower end face of the slide (1) to the bottom end is the distance from the lower end face of the slide (1) to the upper end face of the worktable. At this time, the machine tool Z-axis coordinate is the Z-axis zero point coordinate of the tool installation. When the slide (1) is replaced with a workpiece probe or turning tool, you only need to input its length into the tool list of the CNC system. The CNC system can automatically measure and process the tool or probe according to the calibration program.

2. The debugging method for an online measurement system of an intelligent vertical turning machine tool according to claim 1, characterized in that: The calibration fixture in step 2 consists of two parts: a mounting base (4) and a lower inspection bar (5). The top of the mounting base (4) is matched with the positioning center hole at the bottom center of the slide block (1). The mounting base (4) is inserted into the positioning center hole at the bottom of the slide block (1) and is detachably connected to the slide block (1). The top of the lower inspection bar (5) is inserted into the bottom of the mounting base (4). The axis of the mounting base (4), the axis of the lower inspection bar (5) and the axis of the slide block (1) are collinear. The lower inspection bar (5) is detachably connected to the mounting base (4).

3. The debugging method for an online measurement system of an intelligent vertical turning machine tool according to claim 2, characterized in that: The mounting base (4) has a connecting hole at the center of its bottom end. There are two set screw threaded holes equidistant from each other along the circumference on the inner wall of the connecting hole. A set screw is inserted into each set screw threaded hole and each set screw is threadedly connected to the mounting base (4). The top end of the lower inspection bar (5) is provided with a connecting post, and the connecting post is configured to cooperate with the connecting hole at the bottom end of the mounting base (4). The connecting post at the top end of the lower inspection bar (5) is inserted into the connecting hole at the bottom end of the mounting base (4), and the mounting base (4) is detached and connected to the lower inspection bar (5) through two set screws.

4. The debugging method for an online measurement system of an intelligent vertical turning machine tool according to claim 3, characterized in that: The lower end of the test bar (5) has a measuring column at the center of its bottom end, and the bottom end of the measuring column is the first measuring surface (F), the front side of the measuring column is the second measuring surface (E), the left side of the measuring column is the third measuring surface (G), and the right side of the measuring column is the fourth measuring surface (H).

5. The debugging method for an online measurement system of an intelligent vertical turning machine tool according to claim 4, characterized in that: In step 3, when calibrating the position of the machine tool measuring system, a tool probe calibration block (7) is required. The tool probe calibration block (7) is installed below the crossbeam on the right side of the machine tool. The process of calibrating the position of the machine tool measuring system using the calibration fixture and the tool probe calibration block (7) is as follows: Manually start the machine tool so that the fourth measuring surface (H), the first measuring surface (F) and the third measuring surface (G) in the measuring column at the bottom of the calibration fixture contact the corresponding surfaces of the tool probe calibration block (7) in the (X+, Z-, X-) directions. During the contact process, slowly adjust with the handwheel. After the probe signal is triggered, stop the movement of the machine tool axis and record the corresponding coordinate values. At the same time, according to the X1 and X2 dimensions of the square head at the bottom of the calibration fixture, perform coordinate conversion. That is, use the center position of the slide block (1) for coordinate calibration. The positional relationship between the tool probe calibration block (7) and the zero point of the machine tool worktable can be obtained.

6. The debugging method for an online measurement system of an intelligent vertical turning machine tool according to claim 5, characterized in that: In step 3, when calibrating the position of the machine tool workpiece measurement system, a workpiece probe calibration block (6) is required. The workpiece probe calibration block (6) is installed below the left crossbeam of the machine tool. The process of calibrating the position of the machine tool workpiece measurement system using the calibration fixture and the workpiece probe calibration block (6) is as follows: Manually start the machine tool so that the fourth measuring surface (H), the first measuring surface (F) and the third measuring surface (G) in the measuring column at the bottom of the calibration fixture correspond to the surfaces of the workpiece probe calibration block (6) in the (X+, Z-, X-) directions respectively. The gap values ​​between the center of the slide (1) and each surface of the calibration block are measured by measuring the gauge block. At the same time, according to the X1 and X2 dimensions of the square head at the bottom of the calibration fixture, coordinate conversion is performed. That is, the coordinate calibration is performed using the center position of the slide (1). The positional relationship between the workpiece probe calibration block (6) and the zero point of the machine tool worktable can be obtained.

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