Measuring jig for cutting tool of ring cutting machine and ring cutting machine

Abstract

The utility model provides a measuring jig for a cutting tool of an annular cutting machine and the annular cutting machine. The measuring jig comprises a first positioning piece, a second positioning piece, a lifting mechanism and a distance measuring mechanism. The first positioning piece and the second positioning piece are arranged on the two sides of the ring cutting machine tool respectively, and the lifting mechanism drives the second positioning piece to move from the reference position to the ring cutting machine tool so as to abut against the measuring position of the outer periphery of the ring cutting machine tool. The distance measuring mechanism measures the distance between the reference position and the measuring position. According to the measuring jig, measured and calculated parameter values can be obtained without adopting a ring cutting machine cutter to cut the test blade, so that the consumable cost of the test blade is saved. And meanwhile, the machine stop time and the potential process interruption caused by frequent preventive maintenance and replacement of the test blade are reduced, the equipment operation time is prolonged, and the stability of product production is ensured.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool measuring fixture technology, specifically to a measuring fixture for a circumferential cutting machine cutting tool and a circumferential cutting machine. Background Technology

[0002] The circumferential dicing process is primarily used to remove the bevel at the edge of a wafer to prevent cracks and breakage during subsequent processing. The circumferential dicing machine's blades gradually wear down over time, affecting cutting accuracy and quality. Therefore, to prevent reduced cutting accuracy and product defects caused by excessive blade wear, it is necessary to periodically measure the blade diameter and adjust the blade's entry distance to adapt to the new wear condition, ensuring cutting accuracy and quality.

[0003] In existing circumferential dicing equipment, the test blade (Si-chip) is a measurement consumable used to adjust the cutting distance of the circumferential dicing cutter. The cutting length obtained by the measurement cutter cutting the test blade is used to calculate the cutter circumference and determine the cutting distance, and this is corrected during the wafer trimming process. However, the test blade needs to be replaced after multiple measurement cuts, which increases material waste and replacement costs. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention provides a measuring fixture for circumferential cutting machine cutters and a circumferential cutting machine, so as to improve the technical problems of increased material consumption and replacement cost when replacing existing test blades.

[0005] To achieve the above and other related objectives, the first aspect of this utility model provides a measuring fixture for a circumferential cutting machine cutter. The measuring fixture includes a first positioning member, a second positioning member, a lifting mechanism, and a distance measuring mechanism. The first positioning member is positioned on one side of the circumferential cutting machine cutter and positions the cutter motor of the cutter. The second positioning member is positioned on the other side of the positioned circumferential cutting machine cutter and is linearly movable along the diameter direction of the cutter. The lifting mechanism is mounted on or beside the circumferential cutting machine and drives the second positioning member to move from a reference position along the diameter direction of the cutter towards one side of the cutter to stop at a measuring position abutting against the outer periphery of the cutter, wherein the reference position is tangent to the outer periphery of the cutter in its unworn state. The distance measuring mechanism is used to measure the distance between the reference position and the measuring position.

[0006] In one embodiment of the measuring fixture of this utility model, the first positioning member includes a first positioning rod and a first positioning platform. The first positioning rod is located on one side of the circumferential cutting machine tool. The first positioning platform is disposed on one side of the first positioning rod and positions the tool motor.

[0007] In one embodiment of the measuring fixture of this utility model, a first positioning switch is provided on the first positioning platform, and the first positioning switch abuts against the tool motor after positioning.

[0008] In one embodiment of the measuring fixture of this utility model, the second positioning member includes a second positioning rod and a second positioning switch. The second positioning rod is connected to the lifting mechanism. The second positioning switch is disposed on the second positioning rod and abuts against one side of the circumferential cutting machine cutter after positioning.

[0009] In one embodiment of the measuring fixture of this utility model, the lifting mechanism includes a stepper motor and a lead screw guide mechanism. The output end of the stepper motor is connected to the lead screw guide mechanism, and the lead screw guide mechanism is connected to the second positioning member, thereby driving the second positioning member to move.

[0010] In one embodiment of the measuring fixture of this utility model, the lead screw guide mechanism includes a nut lead screw and a guide rail slider. The output end of the stepper motor is connected to the nut lead screw. The nut lead screw is fixedly connected to a second positioning member, and the guide rail slider is guided and connected to the second positioning member.

[0011] In one embodiment of the measuring fixture of this utility model, a third positioning member is further provided on the guide rail slider, and the third positioning member abuts against the second positioning member located at the reference position.

[0012] In one embodiment of the measuring fixture of this utility model, the ranging mechanism includes a controller, which is communicatively connected to the stepper motor to obtain the number of steps of the stepper motor.

[0013] In one embodiment of the measuring fixture of this utility model, the ranging mechanism adopts a grating ruler, the grating ruler includes a scale grating and a grating reading head, the scale grating is fixedly installed on the first positioning member along a first direction, the grating reading head is fixedly connected to the second positioning member, and the scale grating is adapted to the grating reading head.

[0014] The second aspect of this utility model also provides a circumcision machine, which includes a circumcision machine cutter, a cutter motor, and the measuring fixture described in any one of the above.

[0015] This invention provides a measuring fixture for a circumferential cutting machine cutter and a circumferential cutting machine. A first positioning component positions the cutter motor, thereby positioning the center of the circumferential cutting machine cutter. A lifting mechanism drives the displacement movement of a second positioning component, thereby positioning the outer circumference of the circumferential cutting machine cutter. A distance measuring mechanism obtains the parameter value for calculating the radius or diameter of the circumferential cutting machine cutter by measuring the displacement distance of the second positioning component. This measuring fixture eliminates the need for the circumferential cutting machine cutter to cut the test blade to obtain the parameter value for calculating the cutter diameter or radius, saving on the consumable cost of test blades. It also reduces machine downtime and potential process interruptions caused by frequent preventive maintenance (PM) replacement of test blades, increases equipment uptime, and ensures the stability of product production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the positioning state of the circumferential cutting machine tool in one embodiment of the measuring fixture of this utility model;

[0018] Figure 2 This is a side view of the measuring fixture structure in one embodiment of the measuring fixture of this utility model;

[0019] Figure 3 This is a side view of the positioning state of the circumferential cutting machine tool in one embodiment of the measuring fixture of this utility model;

[0020] Figure 4 This is a side view of the positioning state of the circumcision cutter in another embodiment of the measuring fixture of this utility model.

[0021] Component designation explanation:

[0022] 100. First positioning component; 110. First positioning rod; 120. First positioning platform; 130. First positioning switch; 200. Second positioning component; 210. Second positioning rod; 220. Second positioning switch; 300. Lifting mechanism; 310. Stepper motor; 320. Lead screw guide mechanism; 321. Nut lead screw; 322. Guide rail slider; 330. Third positioning component; 400. Grating ruler; 410. Ruler grating; 420. Grating reading head; 500. Controller; 600. Ring cutting machine cutter; 700. Cutter motor. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0024] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0025] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0026] To address the technical problem of increased material waste and replacement costs caused by measuring and calculating the diameter of the circumferential cutting tool using test blades in existing circumferential cutting machines, this invention provides a measuring fixture for circumferential cutting tool cutters and a circumferential cutting machine itself. By replacing the method of cutting test blades to measure the tool diameter using this measuring fixture, the cost of test blade consumables is saved. Simultaneously, it reduces machine downtime and potential process interruptions caused by frequent preventative maintenance and consumable replacements, increases equipment uptime, and ensures stable product production.

[0027] In existing circumferential slicing equipment, the output end of the circumferential slicing machine's tool motor is equipped with the circumferential slicing machine tool. The tool motor is controlled by a multi-axis linkage system to drive the circumferential slicing machine tool to achieve feed motion in the X, Y and Z axes, thereby removing the beveled surface of the wafer edge to prevent the wafer from cracking or breaking during subsequent processing.

[0028] Please see Figures 1 to 4The first aspect of this utility model provides a measuring fixture for a circumferential cutting machine cutter. This measuring fixture is mounted on the circumferential cutting machine and calculates the diameter of the circumferential cutting machine cutter 600 by measuring a set interval, thus replacing the use of a test blade. The measuring fixture includes a first positioning element 100, a second positioning element 200, a lifting mechanism 300, and a distance measuring mechanism. The first positioning element 100 is mounted on the circumferential cutting machine. When it is necessary to measure the circumferential cutting machine cutter 600, the first positioning element 100 is located on one side of the circumferential cutting machine cutter 600, and the cutter motor 700 abuts against the first positioning element 100, thereby positioning the cutter motor 700 of the circumferential cutting machine cutter 600. Since the output end of the cutter motor 700 is fixedly connected to the circumferential cutting machine cutter 600, when the first positioning element 100 completes the positioning of the cutter motor 700, the center position of the circumferential cutting machine cutter 600 is a fixed coordinate value. The positioning method of the first positioning component 100 to the tool motor 700 is not limited. For example, it can be positioned by limit block, platform support, coordinate value, or positioning switch.

[0029] The second positioning element 200 is spaced apart from the first positioning element 100, and the ring-cutting machine cutter 600 is positioned in the area between the first positioning element 100 and the second positioning element 200. After the cutter motor 700 is positioned, the first positioning element 100 is located on one side of the ring-cutting machine cutter 600, and the second positioning element 200 is located on the other side. The second positioning element 200 is a movable element that can move linearly along the diameter direction of the ring-cutting machine cutter 600, that is, move towards the first positioning element 100, to achieve positioning and contact with the outer periphery of the ring-cutting machine cutter 600. The positioning method between the second positioning element 200 and the ring-cutting machine cutter 600 is not limited; for example, it can be positioning by a limit switch, a positioning switch, an optical sensor, or a mechanical stop.

[0030] The lifting mechanism 300, acting as a drive mechanism for the linear displacement of the second positioning member 200, can be installed on the ring cutting machine or beside it. After the cutter motor 700 is positioned on the first positioning member 100, the lifting mechanism 300 drives the second positioning member 200 to move from its reference position along the diameter direction of the ring cutting machine cutter 600, i.e., towards the first positioning member 100, and closer to one side of the ring cutting machine cutter 600, so that the second positioning member 200 stops and abuts against the outer periphery of the ring cutting machine cutter 600 at the measurement position. The reference position serves as the starting point for the displacement movement of the second positioning member 200. The specific location of the reference position is not limited; it can be a position at a fixed distance from one side of the ring cutting machine cutter 600, or it can be the tangent position of the outer periphery of the ring cutting machine cutter 600 when it is not worn. Specifically, in this embodiment, the reference position is the tangent position of the outer periphery of the ring cutting machine cutter 600 in its unworn state. The measurement position is the position where the second positioning member 200 abuts against the outer periphery of the ring cutting machine cutter 600. The type of lifting mechanism 300 is not limited. It can be any suitable structural type that can drive the second positioning element 200 to move. For example, the lifting mechanism 300 can be a ball screw mechanism, a gear and rack mechanism, a scissor lifting mechanism, a hydraulic lifting mechanism, a pneumatic lifting mechanism, a chain drive lifting mechanism, etc.

[0031] The ranging mechanism is used to measure the distance between the reference position and the measuring position. By measuring the displacement of the second positioning element 200, the ranging mechanism calculates the diameter or radius of the circumferential cutting tool 600. Simultaneously, the ranging mechanism is communicatively connected to the control system of the circumferential cutting machine, feeding back the diameter parameter value of the circumferential cutting tool 600 to the control system, thereby adjusting the cutting decision of the circumferential cutting tool 600. Specifically, when the reference position is the tangent position of the outer periphery of the circumferential cutting tool 600 in its unworn state, during the first wear measurement of the circumferential cutting tool 600, the distance between the reference position and the measuring position is the displacement of the second positioning element 200. The displacement measured by the ranging mechanism represents the wear amount of the circumferential cutting tool 600. Based on the fixed diameter value of the circumferential cutting tool 600 when it is unworn and the wear amount, the current diameter value of the circumferential cutting tool 600 is obtained. When the measuring fixture performs multiple measurements on the ring-cutting machine cutter 600, the first positioning element 100 positions the cutter motor 700. The distance between the center of the ring-cutting machine cutter 600 and the reference position is pre-measured using conventional experimental methods. The distance measuring mechanism measures the distance between the reference position and the measurement position, thereby calculating the radius of the ring-cutting machine cutter 600 under the current measurement state. The type of distance measuring mechanism is not limited; it can be any suitable measuring device type that satisfies the requirement of measuring the distance between the reference position and the measurement position, such as a grating ruler, distance sensor, scale, encoder, etc.

[0032] The tool motor 700 and the circumferential cleaver 600 are moved to the measuring position of the measuring fixture. The first positioning member 100 positions the tool motor 700, achieving center positioning of the circumferential cleaver 600. The lifting mechanism 300 drives the second positioning member 200 to move from the reference position to one side of the outer periphery of the circumferential cleaver 600 until the second positioning member 200 abuts against the outer periphery of the circumferential cleaver 600. The distance measuring mechanism measures the displacement of the second positioning member 200 and, based on the fixed value between the center position of the circumferential cleaver 600 and the reference position, calculates the diameter or radius of the cleaver in the control system. This records and detects changes in the diameter of the cleaver, and adjusts the cutting distance of the circumferential cleaver 600 in real time when cutting the wafer edge, saving on the cost of test inserts. It also reduces machine downtime and potential process interruptions caused by frequent preventative maintenance and test insert replacements, increasing equipment uptime.

[0033] Please see Figure 1 and Figure 2 In one embodiment of the measuring fixture of this utility model, the first positioning member 100 includes a first positioning rod 110 and a first positioning platform 120. The first positioning rod 110 is fixedly installed on the circumferential cutting machine and is located on one side of the circumferential cutting machine tool 600 when the circumferential cutting machine tool 600 is being measured. The distance between the first positioning rod 110 and the outer periphery of the circumferential cutting machine tool 600 is not limited. The first positioning rod 110 can be tangent to the outer periphery of the circumferential cutting machine tool 600 in an unworn state, or it can be set at a fixed distance from the outer periphery of the circumferential cutting machine tool 600. If necessary, the first positioning rod 110 cooperates with the second positioning member 200 as an auxiliary reference for distance measurement. For example, when the first positioning rod 110 is tangent to the outer periphery of the circumferential cutting machine tool 600 in an unworn state, the distance between the first positioning rod 110 and the second positioning member 200 is the diameter value of the circumferential cutting machine tool 600. When the circumcision machine cutter 600 is measuring, it is positioned between the first positioning rod 110 and the second positioning element 200. A first positioning platform 120 is provided on one side of the first positioning rod 110, which positions the cutter motor 700. The first positioning rod 110 and the first positioning platform 120 can be an integral or separate structure. Specifically, in this embodiment, the first positioning rod 110 and the first positioning platform 120 are separate structures.

[0034] To achieve positioning detection between the first positioning stage 120 and the tool motor 700, please refer to... Figure 2 and Figure 3In one embodiment of the measuring fixture of this utility model, a first positioning switch 130 is provided on the first positioning stage 120. The first positioning switch 130 abuts against the positioned tool motor 700 to achieve rapid positioning of the displaced tool motor 700. Simultaneously, the first positioning switch 130 is communicatively connected to the control system and the machine tool's control system. Feedback signals are used to stop the tool motor 700's displacement and to enable the measuring fixture to perform measurement work. The type of the first positioning switch 130 is not limited; it can be any switch structure that achieves the positioning function. For example, it can be a positioning switch or a limit switch, and the first positioning switch 130 can be obtained through common commercial means.

[0035] Please see Figure 1 and Figure 2 In one embodiment of the measuring fixture of this utility model, the second positioning member 200 includes a second positioning rod 210 and a second positioning switch 220. The second positioning rod 210 is connected to a lifting mechanism 300, which drives the second positioning rod 210 to move. The second positioning switch 220 is installed on the second positioning rod 210. When the second positioning rod 210 moves to the measurement position, the second positioning switch 220 abuts against the outer periphery of the ring cutting machine cutter 600. The second positioning switch 220 is communicatively connected to the control system to detect when the second positioning rod 210 reaches the designated measurement position and then stops the second positioning rod 210 from moving. The type of the second positioning switch 220 is not limited; it can be any switch structure that satisfies the positioning function. For example, it can be a positioning switch or a limit switch, and the second positioning switch 220 can be obtained through general commercial means.

[0036] To achieve precise linear motion control of the second positioning element 200, please refer to... Figure 1 and Figure 2 In one embodiment of the measuring fixture of this utility model, the lifting mechanism 300 includes a stepper motor 310 and a lead screw guide mechanism 320. The output end of the stepper motor 310 is connected to the lead screw guide mechanism 320. The stepper motor 310 accurately controls the rotation of the lead screw of the lead screw guide mechanism 320 with accurate step angle and pulse signal response capability. A second positioning member 200 is connected to the lead screw guide mechanism 320, which drives the second positioning member 200 to move.

[0037] For details, please refer to Figure 2In this embodiment, the lead screw guide mechanism 320 includes a lead screw 321 and a guide slider 322. The output end of the stepper motor 310 is connected to the lead screw 321, the lead screw 321 is fixedly connected to the second positioning member 200, and the guide slider 322 is guidedly connected to the second positioning member 200. Specifically, the output end of the stepper motor 310 is connected to one end of the lead screw 321, driving the lead screw to rotate. The nut seat of the lead screw 321 is fixedly connected to one end of the second positioning rod 210. The guide slider 322 is guidedly connected to the second positioning rod 210, thereby forming a lead screw guide transmission form, driving the second positioning member 200 to move relative to the first positioning member 100.

[0038] To ensure the accuracy of the detection results and to ensure that the lifting mechanism 300 drives the second positioning component 200 to move from the reference position, please refer to [link to relevant documentation]. Figure 1 In one embodiment of the measuring fixture of this utility model, a third positioning member 330 is also fixedly installed on the guide rail slider 322. The third positioning member 330 abuts against the second positioning member 200 located at the reference position. Specifically, after the measuring fixture completes one measurement, before the next measurement, the second positioning rod 210 needs to be moved to the reference position under the drive of the lifting mechanism 300. Therefore, a third positioning member 330 is installed on one side of the second positioning rod 210 corresponding to the reference position. When the second positioning rod 210 moves to abut against the third positioning member 330, the second positioning rod 210 is located at the reference position. The third positioning member 330 is fixedly installed on the guide rail of the guide rail slider 322. The third positioning member 330 limits the second positioning rod 210 to ensure that the second positioning rod 210 is moved to the reference position and to ensure the accuracy of the measurement data. The structure of the third positioning member 330 is not limited; it can be a mechanical limit block, a limit switch, or a positioning switch.

[0039] In one embodiment of the measuring fixture of this utility model, the ranging mechanism includes a controller 500, which includes a driver and a programmable module. The programmable module acts as a control system, communicating with the driver to send pulse signals and direction signals to the driver, which then controls the stepper motor's step count and rotation direction. The controller 500 is communicatively connected to the stepper motor 310 to obtain the step count of the stepper motor 310. The method by which the controller 500 controls the stepper motor's movement and obtains the step count can refer to existing control systems and methods, such as using a counter to obtain the step count of the stepper motor. By calculating the product of the step count of the stepper motor 310, the step angle, and the lead of the lead screw of the lead screw guide mechanism (i.e., the linear movement distance corresponding to each revolution of the lead screw), the distance between the reference position and the measuring position, i.e., the displacement of the second positioning rod 210, is obtained, thereby further calculating the radius value of the ring cutting machine cutter 600.

[0040] Please see Figure 4In another embodiment of the measuring fixture of this utility model, the distance measuring mechanism adopts a grating ruler 400, which includes a scale grating 410 and a grating reading head 420. The installation position of the scale grating 410 is not limited; it can be installed on the ring cutting machine table or on the first positioning member 100. In this embodiment, the scale grating 410 is fixedly installed on the first positioning rod 110 of the first positioning member 100 along a first direction, which is the direction of displacement movement of the second positioning member 200, i.e., the Y-axis. The scale grating 410 and the grating reading head 420 are adapted to each other. The grating reading head 420 is fixedly connected to the second positioning member 200. As the second positioning member 200 moves, the grating reading head 420 slides relative to the scale grating 410, thereby measuring the distance between the second positioning rod 210 from the reference position and the measurement position. The ranging principle and structure of the grating ruler 400 are well known in the industry, and the grating ruler 400 can be obtained through general commercial means, so it will not be described in detail here.

[0041] The second aspect of this utility model also provides a circumferential cutting machine, which includes a circumferential cutting machine cutter, a cutter motor, and the measuring fixture described in any of the above embodiments. It should be noted that the circumferential cutting machine of this utility model may also include conventional structural components and systems of existing circumferential cutting machines, such as a machine body, a robotic arm, a feeding system, a positioning system, a multi-axis linkage system, and a control system, which will not be described in detail here.

[0042] The measuring fixture for circumferential cutting machine blades in this invention eliminates the need for cutting the test blades with the circumferential cutting machine blades to obtain the parameter value for measuring and calculating the diameter of the circumferential cutting machine blades, thus saving on the consumable cost of test blades. It also reduces machine downtime and potential process interruptions caused by frequent preventative maintenance and replacement of test blades, increasing equipment uptime and ensuring product production stability. This addresses the technical problems of increased material consumption and replacement costs associated with existing test blade replacement methods. Therefore, this invention effectively overcomes some practical problems in the prior art, thus possessing high utilization value and practical significance.

[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A measuring fixture for a ring cutting machine cutter, characterized in that, The measuring fixture includes: The first positioning component is positioned on one side of the ring cutting machine cutter and positions the cutter motor of the ring cutting machine cutter. The second positioning element is located on the other side of the circumferential cutting tool after positioning, and can move linearly along the diameter direction of the circumferential cutting tool; A lifting mechanism, installed on or beside the circumferential cutting machine, drives the second positioning member to move from a reference position along the diameter direction of the circumferential cutting machine cutter towards one side of the circumferential cutting machine cutter, so as to stop and abut against the measuring position of the outer periphery of the circumferential cutting machine cutter, wherein the reference position is tangent to the outer periphery of the circumferential cutting machine cutter in an unworn state; A ranging mechanism is used to measure the distance between the reference position and the measuring position.

2. The measuring fixture according to claim 1, characterized in that, The first positioning element includes: The first positioning rod is located on one side of the circumferential cutting machine blade; The first positioning stage is located on one side of the first positioning rod and positions the tool motor.

3. The measuring fixture according to claim 2, characterized in that, A first positioning switch is provided on the first positioning platform, and the first positioning switch abuts against the tool motor after positioning.

4. The measuring fixture according to claim 1, characterized in that, The second positioning component includes a second positioning rod and a second positioning switch. The second positioning rod is connected to the lifting mechanism. The second positioning switch is disposed on the second positioning rod and abuts against one side of the circumferential cutting machine blade after positioning.

5. The measuring fixture according to claim 1, characterized in that, The lifting mechanism includes a stepper motor and a lead screw guide mechanism. The output end of the stepper motor is connected to the lead screw guide mechanism, and the lead screw guide mechanism is connected to the second positioning component, thereby driving the second positioning component to move.

6. The measuring fixture according to claim 5, characterized in that, The lead screw guide mechanism includes a lead screw and a guide rail slider. The output end of the stepper motor is connected to the lead screw. The lead screw is fixedly connected to a second positioning component, and the guide rail slider is guided and connected to the second positioning component.

7. The measuring fixture according to claim 6, characterized in that, The guide rail slider is also provided with a third positioning component, which abuts against the second positioning component located at the reference position.

8. The measuring fixture according to claim 5, characterized in that, The ranging mechanism includes a controller, which is communicatively connected to the stepper motor.

9. The measuring fixture according to claim 1, characterized in that, The ranging mechanism uses a grating ruler, which includes a scale grating and a grating reading head. The scale grating is fixedly installed on the first positioning member along a first direction, and the grating reading head is fixedly connected to the second positioning member. The scale grating is adapted to the grating reading head.

10. A ring-cutting machine, comprising a ring-cutting machine blade and a blade motor, characterized in that, It also includes the measuring fixture as described in any one of claims 1 to 9.

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