Measurement apparatus for zero-point positioning of rotating shaft of machine tool, and measurement method

Abstract

A measurement apparatus for the zero-point positioning of a rotating shaft of a machine tool. The measurement apparatus comprises a mount (1), wherein a non-contact measurement module (2) is arranged on the mount (1). The measurement apparatus further comprises a communication module (3) and a data processing module (4), wherein a signal input end of the communication module (3) is in communication connection with the non-contact measurement module (2), and an output end of the communication module (3) is connected to the data processing module (4). Further provided is a measurement method based on a measurement apparatus for the zero-point positioning of a rotating shaft of a machine tool. In the measurement apparatus and measurement method for the zero-point positioning of a rotating shaft of a machine tool, a mandrel is replaced by the non-contact measurement module (2), and measurement is no longer realized by means of the mandrel touching a standard measurement block; moreover, by means of adjusting an effective range of the non-contact measurement module (2), it is ensured that all parameters are collected immediately after a reference measurement surface is calibrated, and a corresponding result is automatically calculated and output to quickly determine whether the zero-point positioning of the rotating shaft of the machine tool meets requirements, thereby improving measurement efficiency.

Description

A measuring device and a measuring method for zero point positioning of a machine tool rotary axis Technical Field

[0001] The present application relates to the technical field of detection equipment, and in particular to a measuring device and a measuring method for zero-point positioning of a rotating axis of a machine tool. Background Art

[0002] CNC machine tools are widely used in the field of mechanical processing. The zero-point positioning accuracy of the machine tool's rotating axis is an important basis for ensuring the quality of parts processing. The traditional method of machine tool accuracy detection is mainly through manual detection with the help of mandrels, dial indicators and other inspection tools. The above detection method is time-consuming and greatly affected by the skills of the personnel. Especially for the automated production line processing mode, the parts batch is large, and the manual detection method will seriously affect the production rhythm. Therefore, the existing industrial-scale production has put forward higher requirements on the efficiency of machine tool fixed-point positioning accuracy detection.

[0003] Summary of the Invention

[0004] The main purpose of this application is to provide a measuring device and a measuring method for zero-point positioning of a machine tool rotating axis, aiming to solve the defect of low detection efficiency in the prior art.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A measuring device for zero-point positioning of a rotating axis of a machine tool, comprising a mounting frame;

[0007] A non-contact detection module, the non-contact detection module is used to calibrate the reference detection surface, and the non-contact detection module is connected to the mounting frame;

[0008] a communication module, the communication module being communicatively connected to the contactless detection module;

[0009] A data processing module is communicatively connected to the communication module.

[0010] Optionally, the non-contact detection module includes a laser emitter; the bottom of the mounting frame is further provided with an end cover, and the end cover is provided with a light-transmitting hole adapted to the measuring end of the laser emitter.

[0011] Optionally, the communication module includes a signal receiver, an input end of the signal receiver is wirelessly connected to the laser transmitter, and an output end of the signal receiver is connected to a signal acquisition port of an external machine tool.

[0012] Accordingly, the present application also discloses a measuring method based on the above-mentioned measuring device for zero-point positioning of a machine tool rotary axis, comprising the following steps:

[0013] Placing a standard detection block on a machine tool and selecting a reference detection surface on the standard detection block;

[0014] Setting a detection trajectory according to the installation position of the standard detection block, and obtaining a distance parameter H between the non-contact detection module and the reference detection surface; setting an effective range L of the non-contact detection module;

[0015] Installing a measuring device on a standard spindle, moving the standard spindle along the detection track, and obtaining a standard coordinate a1;

[0016] Installing a measuring device on the spindle to be detected, moving the spindle to be detected along the detection trajectory, and obtaining a detection coordinate a2;

[0017] The zero point positioning accuracy deviation of the main axis is calculated according to the distance parameter H, the effective measuring range L, the standard coordinate a1 and the detection coordinate a2.

[0018] Optionally, the measuring device is mounted on a standard spindle, and the standard spindle is moved along the detection track to obtain the standard coordinate a1, including the following steps:

[0019] Install the measuring device on the standard spindle;

[0020] Controlling the standard spindle to move to the starting point of a preset detection trajectory, and adjusting the posture of the standard spindle to the A-axis standard detection position or the C-axis standard detection position;

[0021] Controlling the standard spindle to move along a preset detection trajectory until the non-contact detection module calibrates the reference detection surface;

[0022] The coordinates of the non-contact detection module when calibrating the reference detection surface are obtained, and the above coordinates are used as the standard coordinates a1.

[0023] Optionally, the A-axis standard detection position indicates that the A-axis is kept positioned at 0° and the C-axis is kept positioned at 0°, and the C-axis standard detection position indicates that the A-axis is kept positioned at 90° and the C-axis is kept positioned at 0°.

[0024] Optionally, a measuring device is installed on the main shaft to be detected, and the main shaft to be detected is moved along the detection trajectory to obtain the detection coordinate a2, including the following steps:

[0025] Install the measuring device on the spindle to be tested;

[0026] Move the spindle to be inspected to the starting point of the preset inspection trajectory;

[0027] Controlling the spindle to be inspected to move along a preset inspection trajectory until the non-contact inspection module calibrates the reference inspection surface;

[0028] The coordinates of the reference detection surface when the non-contact detection module is calibrated are obtained, and the above coordinates are used as the detection coordinates a2.

[0029] Optionally, calculating the zero point positioning accuracy deviation of the spindle according to the distance parameter H, the effective range L, the standard coordinate a1 and the detection coordinate a2 includes the following steps:

[0030] Determine the deviation direction of the spindle to be tested;

[0031] Selecting a calculation formula for the zero point positioning accuracy deviation of the spindle to be measured according to the deviation direction;

[0032] The standard positioning parameters and the detection positioning parameters are introduced into a selected calculation formula to calculate the zero point positioning accuracy deviation of the spindle to be measured.

[0033] Optionally, determining the deviation direction of the main shaft to be detected includes the following steps:

[0034] According to the formula △a=a 1- a2 calculates the coordinate difference between the standard coordinate and the detection coordinate;

[0035] If the coordinate difference is positive, the deviation direction of the main axis to be detected is a positive deviation;

[0036] If the coordinate difference is negative, the deviation direction of the main axis to be detected is a negative deviation.

[0037] Optionally, the calculation formula for the zero point positioning accuracy deviation includes a positive deviation formula and a negative deviation formula, and the expression of the positive deviation formula is: The negative deviation formula is expressed as: Where L represents the detection parameter, H represents the distance, a1 represents the standard coordinate, and a2 represents the detection coordinate.

[0038] Compared with the prior art, this application has the following beneficial effects:

[0039] The present application includes a mounting frame, on which a non-contact detection module is provided, and the measuring device also includes a communication module and a data processing module, wherein the signal input end of the communication module is communicatively connected to the non-contact detection module, and the output end of the communication module is connected to the data processing module;

[0040] Correspondingly, the present application also discloses a measurement method based on the above-mentioned measuring device, which includes first placing a standard detection block on a machine tool and establishing a reference detection surface on the standard detection block; then setting a detection trajectory according to the installation position of the reference detection block, and obtaining a distance parameter H between the non-contact detection module and the reference detection surface; setting an effective range L of the non-contact detection module; then obtaining the standard coordinates and the detection coordinates respectively, and calculating the zero point positioning accuracy deviation of the spindle using the above-mentioned parameters;

[0041] In the prior art, the detection and calculation of the spindle zero-point positioning accuracy deviation requires the use of a core rod and a standard detection block. During the detection process, the standard detection block is placed on the machine tool, and the core rod is driven to move toward the standard detection block by the movement of the machine tool spindle. When the core rod touches the standard detection block, the spindle is controlled to stop, and finally the zero-point positioning accuracy of the rotating axis is calculated based on the contact position coordinates of the core rod and the standard detection block. Not only is the operation cumbersome, but whether the core rod collides with the standard detection block requires technical personnel in this field to judge based on work experience, which places high demands on the staff. At the same time, in order to avoid collision interference detection between the core rod and the standard detection block as much as possible, the contact force between the core rod and the standard detection block should be as small as possible, and the core rod needs to be controlled to stop moving at the moment of judging that the contact occurs. This requires high operating skills from technical personnel in this field, resulting in low detection efficiency.

[0042] The present application avoids direct contact with the standard detection block by adopting a non-contact detection module. At the same time, by controlling the effective range L of the non-contact detection module, that is, the corresponding control signal will not be triggered only when the distance between the detection module and the reference detection surface is greater than the effective range L, thereby ensuring that the control signal is triggered when the distance between the detection module and the reference detection surface is equal to the effective range L, thereby achieving data collection;

[0043] At the same time, the distance parameter H is solidified by detecting the trajectory, and the parameters in the calculation model are fixed, which reduces the amount of data that needs to be collected and helps improve detection efficiency.

[0044] Secondly, the technical solution described in this application no longer requires the core rod to touch the standard detection block to achieve detection, and all parameters are collected at the first time of calibrating the reference detection surface, and the corresponding results are automatically calculated and output, helping technical personnel in this field to quickly determine whether the zero point positioning of the machine tool rotating axis meets the requirements, thereby improving the detection efficiency as much as possible.

[0045] At the same time, compared with the traditional manual inspection method using inspection tools, this device has a fast inspection speed, does not require manual intervention during the inspection process, and the inspection results are not affected by the operator's skill level. It is particularly suitable for large-scale processing modes based on production lines, and can effectively reduce the impact of machine tool precision inspection on product processing rhythm;

[0046] Since there is no longer any contact with the standard detection module, it can effectively avoid interference and collision with the machine tool or standard block to cause equipment damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is a schematic structural diagram of a measuring device for zero-point positioning of a machine tool rotary axis provided in Embodiment 1 of the present application;

[0048] Figure 2 is a schematic diagram of the mounting frame structure;

[0049] FIG3 is a flow chart of a measuring method of a measuring device for zero-point positioning of a machine tool rotary axis provided in Embodiment 1 of the present application;

[0050] Figure 4 is a diagram showing the principle of positive deviation calculation;

[0051] Figure 5 is a diagram showing the principle of negative deviation calculation;

[0052] Reference numerals: 1-mounting frame, 2-contactless detection module, 3-communication module, 4-data processing module, 5-end cover, 6-light transmission hole.

[0053] The purpose, features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0055] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] Implementation Method 1

[0059] 1 to 3 , this embodiment, as an optional embodiment of the present application, discloses a measuring device for zero-point positioning of a rotating axis of a machine tool, comprising a mounting frame 1, wherein the mounting frame 1 comprises a tool holder and a housing, wherein the top of the housing is connected to the tool holder, and the tool holder is used to connect to a tool claw of a spindle of a machine tool to be inspected;

[0060] An end cover 5 is threadedly connected to the bottom of the housing, and a light-transmitting hole 6 is provided at the center of the end cover 5;

[0061] The measuring device also includes a non-contact detection module 2, which includes a laser transmitter and a wireless communication signal transmitter. The wireless communication signal transmitter uses a Bluetooth communication module 3 or other communication module 3. The laser transmitter can also be a device with a wireless communication module 3.

[0062] The laser emitter is arranged in the housing; the laser emitting end of the laser emitter is inserted into the light-transmitting hole 6;

[0063] The measuring device also includes a communication module 3, which is a wireless communication module 3 such as a Bluetooth module commonly used in the prior art. The signal input end of the communication module 3 is communicatively connected to the signal transmitting device in the non-contact detection module 2, and its output end is connected to the signal acquisition port of the external machine tool equipment through a wire, such as an input point of the PLC digital input module of the CNC machine tool.

[0064] This application calibrates the reference detection surface through the non-contact detection module 2, which can complete the collection of all parameters at the first time of calibrating the reference detection surface, and automatically complete the relevant calculation output results. The entire detection process does not require human intervention, and its degree of automation is high, which greatly improves the measurement efficiency.

[0065] Implementation Method 2

[0066] This embodiment, as an optional embodiment of the present application, discloses a measuring method of a measuring device for zero-point positioning of a machine tool rotary axis, comprising the following steps:

[0067] It should be noted that this application will specifically illustrate this embodiment using two specific examples of calibrating the A-axis and C-axis of a machine tool;

[0068] S1. Place a standard detection block on a machine tool and select a reference detection surface on the standard detection block;

[0069] Select a point on the machine tool workbench for installing the standard detection block, and install the selected standard detection block at the above point;

[0070] At the same time, one side of the standard detection block is selected as the reference detection surface according to the rotating axis to be measured; if the zero point positioning accuracy of the machine tool A axis needs to be measured, the top surface of the standard detection block needs to be selected as the reference detection surface;

[0071] If you need to measure the zero point positioning accuracy of the C-axis of the machine tool, select the side perpendicular to the output end of the laser emitter as the reference detection surface;

[0072] S2. Setting a detection trajectory according to the installation position of the standard detection block, and obtaining a distance parameter H between the non-contact detection module and the reference detection surface; and setting an effective range L of the non-contact detection module;

[0073] Setting a detection trajectory, wherein a straight line is the best detection trajectory, and the detection trajectory needs to pass through the reference detection surface selected in step S1, and the detection trajectory is parallel to the reference detection surface;

[0074] Since the detection track is parallel to the reference detection surface, the distance parameter between any point on the detection track and the reference detection surface is a constant value;

[0075] The above setting of the detection trajectory not only simplifies the measurement process, but also solidifies the distance parameters. During the detection process, there is no need to detect the above parameters on site, which reduces the number of parameters that need to be detected and helps improve detection efficiency.

[0076] The effective range L of the non-contact detection module refers to the maximum detection distance of the non-contact detection module. For example, when a laser transmitter is used as the non-contact detection module, the effective range L refers to the length of the emitted laser beam. The above parameters can be adjusted by the control module of the laser transmitter;

[0077] It should be noted that in order to ensure that the laser beam can illuminate the reference detection surface, the distance parameter H is not greater than the effective range L;

[0078] By controlling the length of the laser beam, it is possible to obtain the corresponding measurement parameters as soon as the laser beam falls on the reference detection surface. At the same time, interference with the measurement process by external equipment such as machine tool worktables can be eliminated, thereby improving measurement accuracy.

[0079] In a specific example, if the zero-point positioning accuracy of the A-axis of a machine tool is measured, the detection trajectory is a horizontal line parallel to the Y-axis;

[0080] If the zero-point positioning accuracy of the C-axis of a machine tool is measured, the detection trajectory is a horizontal line parallel to the X-axis;

[0081] S3, installing the measuring device on the standard spindle, moving the standard spindle along the detection trajectory, and obtaining the standard coordinate a1;

[0082] S31. Install the measuring device on the standard spindle;

[0083] S32, controlling the standard spindle to move to the starting point of a preset detection trajectory, and adjusting the posture of the standard spindle to the A-axis standard detection position or the C-axis standard detection position;

[0084] The standard spindle is a spindle that has been adjusted and calibrated. During the measurement process, it is determined that the zero point positioning accuracy of the standard spindle meets the requirements;

[0085] If the zero-point positioning accuracy of the A-axis of the machine tool is measured, the posture of the standard spindle is adjusted to the A-axis standard detection position, and the A-axis standard detection position indicates that the A-axis is kept at 0° and the C-axis is kept at 0°; if the zero-point positioning accuracy of the C-axis of the machine tool is measured, the posture of the standard spindle is adjusted to the C-axis standard detection position, and the C-axis standard detection position indicates that the A-axis is kept at 90° and the C-axis is kept at 0°;

[0086] Select the corresponding posture parameters according to the axis to be measured and control the axes of the machine tool according to the above parameters;

[0087] Then, the machine tool spindle is controlled to move to the starting point of the detection trajectory set in step S2. In a specific example, the emission point of the laser emitter is ensured to be at the starting point of the detection trajectory through external detection equipment or coordinate point control.

[0088] S33, controlling the standard spindle to move along a preset detection trajectory until the non-contact detection module calibrates the reference detection surface;

[0089] Control the standard spindle to move along a preset detection trajectory. In a specific example, if the zero point positioning accuracy of the A-axis of the machine tool is to be measured, the spindle is controlled to move in the Y-direction.

[0090] If the zero-point positioning accuracy of the C-axis of the machine tool is measured, the spindle is controlled to move in the direction toward X-;

[0091] When the laser emitter is not directly above the reference detection surface, due to the limited length of the laser beam, the end point of the laser beam cannot reach the surface of any solid structure, and therefore no detection signal will be fed back;

[0092] When the laser emitter moves to the point directly above the reference detection surface, since the distance parameter H is not greater than the effective range L, the laser beam will be intercepted by the reference detection surface, and the end point of the laser beam will be located on the reference detection surface. The length of the laser beam will be shortened, thereby triggering and feeding back the corresponding control signal;

[0093] S34, obtaining the coordinates of the reference detection surface when the non-contact detection module is calibrated, and using the above coordinates as the standard coordinates a1;

[0094] The control signal fed back by the laser transmitter is fed back to the data processing module through the communication module, and the machine tool stops. At the same time, the coordinates of the emission point of the laser transmitter on the detection track are measured by the coordinate detection module of the machine tool, and the above coordinates are used as the standard coordinates a1;

[0095] In a specific example, if the zero-point positioning accuracy of the A-axis of a machine tool is measured, the standard coordinate a1 is the Y1-axis coordinate;

[0096] If the zero-point positioning accuracy of the C-axis of a machine tool is measured, the standard coordinate a1 is the X1-axis coordinate;

[0097] S4, installing the measuring device on the main shaft to be detected, moving the main shaft to be detected along the detection trajectory, and obtaining the detection coordinate a2;

[0098] S41, installing the measuring device on the spindle to be tested. It should be noted that after the measuring device is installed, the coordinates of the laser emission point of the laser emitter are the same as the coordinates in step S31 to improve the detection accuracy;

[0099] S42, moving the spindle to be inspected to the starting point of the preset inspection trajectory, that is, the laser emission point of the laser emitter coincides with the starting point;

[0100] It should also be noted that the above detection trajectory is the same trajectory as the detection trajectory in step S2;

[0101] S43, controlling the spindle to be detected to move along a preset detection trajectory until the non-contact detection module calibrates the reference detection surface;

[0102] In a specific example, if the zero point positioning accuracy of the A-axis of a machine tool is measured, the spindle is controlled to move in the Y-direction;

[0103] If the zero-point positioning accuracy of the C-axis of the machine tool is measured, the spindle is controlled to move in the direction toward X-;

[0104] S44, obtaining the coordinates of the reference detection surface when the non-contact detection module is calibrated, and using the above coordinates as the detection coordinates a2

[0105] When the laser emitter moves to the point directly above the reference detection surface, since the distance parameter H is not greater than the effective range L, the laser beam will be intercepted by the reference detection surface, and the end point of the laser beam will be located on the reference detection surface. The length of the laser beam will be shortened, thereby triggering and feeding back the corresponding control signal;

[0106] The control signal fed back by the laser transmitter is fed back to the data processing module through the communication module, and the machine tool stops. At the same time, the coordinates of the emission point of the laser transmitter on the detection track are measured by the coordinate detection module of the machine tool, and the above coordinates are used as the detection coordinates a2;

[0107] In a specific example, if the zero-point positioning accuracy of the A-axis of a machine tool is measured, the standard coordinate a2 is the Y2-axis coordinate;

[0108] If the zero-point positioning accuracy of the C-axis of a machine tool is measured, the standard coordinate a2 is the X2-axis coordinate;

[0109] S5. Calculate the zero point positioning accuracy deviation of the spindle according to the distance parameter H, the effective measuring range L, the standard coordinate a1 and the detection coordinate a2.

[0110] S51, determining the deviation direction of the main shaft to be detected;

[0111] S511, calculating the coordinate difference between the standard coordinate and the detection coordinate according to the formula △a=a1-a2;

[0112] Combining Figures 4 and 5, Figure 4 shows the state of positive deviation, and Figure 5 shows the state of negative deviation. Since the direction of deviation cannot be observed by the naked eye, and the detection trajectory is determined, when measuring the zero point positioning accuracy of the machine tool A axis, only the Y coordinate changes, and when measuring the zero point positioning accuracy of the machine tool C axis, only the X coordinate changes. Therefore, by judging the size of the coordinate value, it is possible to quickly determine whether a positive deviation or a negative deviation occurs;

[0113] S512: If the coordinate difference is positive, the deviation direction of the main axis to be detected is a positive deviation;

[0114] If △a=a 1- If a2 is positive, the deviation direction of the spindle to be detected is positive deviation;

[0115] S513: If the coordinate difference is negative, the deviation direction of the main axis to be detected is a negative deviation.

[0116] If △a=a1-a2 is negative, the deviation direction of the spindle to be detected is negative deviation;

[0117] Combining Figures 4 and 5, we can derive the positive deviation formula and the negative deviation formula, which will not be described here.

[0118] S52, selecting a calculation formula for the zero point positioning accuracy deviation of the spindle to be measured according to the deviation direction;

[0119] S53 , importing the standard positioning parameters and the detection positioning parameters into a selected calculation formula to calculate the zero point positioning accuracy deviation of the spindle to be measured.

[0120] If it is determined to be a positive deviation, call the positive deviation formula The parameters obtained in steps S34 and S44 are brought into the above parameters for calculation;

[0121] If it is determined to be a negative deviation, call the negative deviation formula The parameters obtained in steps S34 and S44 are brought into the above parameters for calculation.

[0122] The present application avoids direct contact with the standard detection block by adopting a non-contact detection module. At the same time, by controlling the effective range L of the non-contact detection module, that is, the corresponding control signal will not be triggered only when the distance between the detection module and the reference detection surface is greater than the effective range L, thereby ensuring that the control signal is triggered when the distance between the detection module and the reference detection surface is equal to the effective range L, thereby achieving data collection;

[0123] At the same time, the distance parameter H is solidified by detecting the trajectory, and the parameters in the calculation model are fixed, which reduces the amount of data that needs to be collected and helps improve detection efficiency.

[0124] Secondly, the technical solution described in this application no longer requires the core rod to touch the standard detection block to achieve detection, and all parameters are collected at the first time of calibrating the reference detection surface, and the corresponding results are automatically calculated and output, helping technical personnel in this field to quickly determine whether the zero point positioning of the machine tool rotating axis meets the requirements, thereby improving the detection efficiency as much as possible.

[0125] At the same time, compared with the traditional manual inspection method using inspection tools, this device has a fast inspection speed, does not require manual intervention during the inspection process, and the inspection results are not affected by the operator's skill level. It is particularly suitable for large-scale processing modes based on production lines, and can effectively reduce the impact of machine tool precision inspection on product processing rhythm;

[0126] Since there is no longer any contact with the standard detection module, it can effectively avoid interference and collision with the machine tool or standard block to cause equipment damage.

[0127] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A measuring device for zero-point positioning of a machine tool rotary axis, characterized in that: comprising a mounting frame (1); A non-contact detection module (2), the non-contact detection module (2) being used to calibrate a reference detection surface, the non-contact detection module (2) being connected to the mounting frame (1); A communication module (3), the communication module (3) being communicatively connected with the contactless detection module (2); A data processing module (4), the data processing module (4) is communicatively connected to the communication module (3).

2. A measuring device for zero-point positioning of a machine tool rotary axis according to claim 1, characterized in that: The non-contact detection module (2) comprises a laser emitter; an end cover (5) is also provided at the bottom of the mounting frame (1), and a light-transmitting hole (6) adapted to the measuring end of the laser emitter is provided on the end cover (5).

3. A measuring device for zero-point positioning of a machine tool rotary axis according to claim 1, characterized in that: The communication module (3) comprises a signal receiver, the input end of the signal receiver is wirelessly connected to the laser transmitter, and the output end of the signal receiver is connected to a signal collection port of an external machine tool.

4. A measuring method for a measuring device for zero-point positioning of a machine tool rotary axis according to any one of claims 1 to 3, characterized in that: The following steps are involved: Placing a standard detection block on a machine tool, and selecting a reference detection surface on the standard detection block; Setting a detection track according to the installation position of the standard detection block, and obtaining a distance parameter H between the non-contact detection module and the reference detection surface; Setting the effective range L of the non-contact detection module; Installing a measuring device on a standard spindle, moving the standard spindle along the detection track, and obtaining a standard coordinate a1; Installing a measuring device on the main shaft to be detected, moving the main shaft to be detected along the detection track, and obtaining the detection coordinate a2; The main axis is calculated according to the distance parameter H, the effective range L, the standard coordinate a1 and the detection coordinate a2 Zero point positioning accuracy deviation.

5. The measuring method according to claim 4, characterized in that: The step of installing the measuring device on the standard spindle, moving the standard spindle along the detection track, and obtaining the standard coordinate a1 includes the following steps: Install the measuring device on the standard spindle; Controlling the standard spindle to move to the starting point of a preset detection trajectory, and adjusting the posture of the standard spindle to the A-axis standard detection position or the C-axis standard detection position; Controlling the standard spindle to move along a preset detection trajectory until the non-contact detection module calibrates the reference detection surface; The coordinates of the non-contact detection module when calibrating the reference detection surface are obtained, and the above coordinates are used as standard coordinates a1.

6. The measuring method according to claim 5, characterized in that: The A-axis standard detection position indicates that the A-axis is kept positioned at 0° and the C-axis is kept positioned at 0°, and the C-axis standard detection position indicates that the A-axis is kept positioned at 90° and the C-axis is kept positioned at 0°.

7. The measuring method according to claim 4, characterized in that: The step of installing the measuring device on the main shaft to be detected, moving the main shaft to be detected along the detection trajectory, and obtaining the detection coordinate a2 includes the following steps: Install the measuring device on the spindle to be tested; Move the spindle to be inspected to the starting point of the preset inspection trajectory; Controlling the spindle to be detected to move along a preset detection trajectory until the non-contact detection module calibrates the reference detection surface; The coordinates of the non-contact detection module when calibrating the reference detection surface are obtained, and the above coordinates are used as the detection coordinates a2.

8. The measuring method according to claim 4, characterized in that: The method of calculating the zero point positioning accuracy deviation of the spindle according to the distance parameter H, the effective range L, the standard coordinate a1 and the detection coordinate a2 comprises the following steps: Determine the deviation direction of the spindle to be tested; Selecting a calculation formula for the zero point positioning accuracy deviation of the spindle to be measured according to the deviation direction; The standard positioning parameters and the detection positioning parameters are introduced into a selected calculation formula to calculate the zero point positioning accuracy deviation of the spindle to be measured.

9. The measuring method according to claim 4, characterized in that: Determining the deviation direction of the main shaft to be detected includes the following steps: Calculate the coordinate difference between the standard coordinate and the detection coordinate according to the formula △a=a1-a2; If the coordinate difference is positive, the deviation direction of the main axis to be detected is a positive deviation; If the coordinate difference is negative, the deviation direction of the main axis to be detected is a negative deviation.

10. The measuring method according to claim 4, characterized in that: The calculation formula of the zero point positioning accuracy deviation includes a positive deviation formula and a negative deviation formula, and the expression of the positive deviation formula is: The negative deviation formula is expressed as: Where L represents the detection parameter, H represents the distance, a1 represents the standard coordinate, and a2 represents the detection coordinate.

Images