A detection device for a displacement measuring mechanism

Abstract

This invention discloses a detection device for a displacement measuring mechanism, comprising an axial displacement detection device, a radial displacement detection device, and a frame. The axial and radial displacement detection devices are connected to the frame. A test object, which is a frustum-shaped structure, is disposed inside the frame and is placed horizontally along the axial direction. The end face of the test object abuts against the axial displacement detection device. A radial displacement detection device is located radially on the test object, including a detection end. When the test object moves axially, the distance from the detection end to the test object changes. This ensures that, when the test object is in use, the radial distance can be accurately determined by detecting the radial distance.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing and manufacturing, and in particular to a detection device for a displacement measuring mechanism. Background Technology

[0002] In CNC machine tools, the spindle has an automatic tool change function. To monitor the tool change status of the spindle, a limit switch is installed on the spindle. The limit switch monitors different tool change statuses and sends signals to the control panel, allowing the operator to perform the next operation based on the signals.

[0003] Multiple limit switches are typically installed on the spindle to monitor its axial movement at various positions. The spindle's axial position is used to determine the tool status at the spindle end. Limit switches require corresponding structures, such as bosses, to serve as detection points. Multiple limit switches and detection points occupy a significant amount of internal space in the spindle, impacting its overall structural layout and increasing production costs.

[0004] To minimize the space occupied inside the spindle, only one distance sensor is installed inside the spindle, and a cone is mounted on the spindle as a detection point. The spindle position is determined by detecting the radial change in the position of the cone's inclined surface relative to the distance sensor. However, accurately determining the axial position of the spindle based on radial distance changes is a problem that needs to be solved. Summary of the Invention

[0005] This invention provides a detection device for a displacement measuring mechanism to overcome the problem that the error in the correspondence between radial and axial distances at the detection points on the spindle affects the determination of the spindle position.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A detection device for a displacement measuring mechanism includes an axial displacement detection device, a radial displacement detection device, and a frame, wherein the axial displacement detection device and the radial displacement detection device are connected to the frame;

[0008] The frame contains a test object, which is a frustum structure. The test object is placed horizontally along the axial direction. The end face of the test object abuts against the axial displacement detection device. A radial displacement detection device is provided on the radial side of the test object. The radial displacement detection device includes a detection end. When the test object moves along the axial direction, the distance from the detection end to the test object changes.

[0009] Furthermore, it also includes a threaded rod and a handle. The frame is provided with a threaded hole, the threaded rod is screwed into the threaded hole, one end of the threaded rod is connected to the end face of the object to be tested, and the other end is connected to the handle.

[0010] Furthermore, the top of the frame is provided with a strip-shaped opening, and the radial displacement detection device slides within the strip-shaped opening through a connecting part.

[0011] Furthermore, the connecting part includes a groove and a slider, the radial displacement detection device is disposed in the groove, and the strip opening is provided with a slide rail corresponding to the slider.

[0012] Furthermore, a scale is provided on the frame along the moving direction of the radial displacement detection device.

[0013] Furthermore, the axial displacement detection device is a displacement sensor, which includes a spring rod that passes through the side wall of the frame and abuts against the object to be measured.

[0014] Furthermore, the frame includes a mounting part and a bracket, the mounting part and the bracket are fixedly connected by bolts, and the axial displacement monitoring device is mounted on the bracket.

[0015] Beneficial effects: This invention measures the radial distance from the detection point of the radial displacement detection device to the test body when the test body moves axially. Through actual testing, the corresponding parameters of the axial displacement and radial distance of the test body can be determined. This ensures that when the test body is used, it can be used with a sensor to accurately determine the position of the tool by judging the position of the spindle in the axial direction. This avoids the test body's machining errors affecting the spindle position detection results during use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is the front view of the present invention;

[0018] Figure 2 for Figure 1 Sectional view at CC;

[0019] Figure 3 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 4 This is a top view of the present invention;

[0021] Figure 5 for Figure 4 Sectional view at point AA.

[0022] In the diagram: 1. Axial displacement detection device; 11. Spring rod; 2. Radial displacement detection device; 21. Detection point; 22. Connecting part; 23. Groove; 24. Slider; 3. Measured object; 4. Frame; 41. Strip opening; 42. Mounting part; 43. Bracket; 5. Threaded rod; 6. Handle; 7. Scale; 8. Slide rail. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This embodiment provides a detection device for a displacement measuring mechanism, such as... Figures 1 to 5 As shown, it includes an axial displacement detection device 1, a radial displacement detection device 2, and a frame 4, wherein the axial displacement detection device 1 and the radial displacement detection device 2 are connected to the frame 4;

[0025] The frame 4 contains a test object 3, which is a frustum structure. The test object 3 is placed horizontally along the axial direction. The end face of the test object 3 abuts against the axial displacement detection device 1. The test object 3 is provided with a radial displacement detection device 2 in the radial direction. The radial displacement detection device 2 includes a detection end 21. When the test object 3 moves along the axial direction, the distance from the detection end 21 to the test object 3 changes.

[0026] Specifically, such as Figure 3As shown, a test object 3 for mounting onto the spindle is provided inside the frame 4. In this embodiment, the test object 3 is a frustum of a cone. The frustum of a cone is placed horizontally within the frame 4 for measurement, ensuring that the axial direction of the test object 3 is perpendicular to the radial displacement detection device 2 and parallel to the axial displacement detection device 1, thereby ensuring the accuracy of the measured values. An axial displacement detection device 1 is provided on the axial direction of the test object 3. In this embodiment, the axial displacement detection device 1 is a displacement sensor that detects the axial movement distance of the test object 3. A radial displacement detection device 2 is provided on the radial direction of the test object 3. In this embodiment, the radial displacement detection device 2 is a distance sensor that detects the distance movement distance of the test object 3. The distance from the test body 3 to the detection point 21 when the body 3 moves axially is such that, since the test body 3 has an inclined surface, each axial position of the test body 3 corresponds to a unique distance to the detection point 21. By measuring this value, the axial and radial positional correspondence of the test body 3 is accurately determined, so that when the test body 3 is applied to the spindle, the movement position of the spindle can be accurately judged. In this embodiment, a frustum is preferred as the test body 3. Since the radial cross section of the frustum is circular, when the frustum is fixed in the axial position and only rotates, the distance from the radial displacement detection device 2 to the side of the test body 3 is equal, so it is easy to judge the accuracy of the detection result.

[0027] It also includes a threaded rod 5 and a handle 6. The frame 4 is provided with a threaded hole, and the threaded rod 5 is screwed into the threaded hole. One end of the threaded rod 5 is connected to the end face of the object to be tested 3, and the other end is connected to the handle 6.

[0028] Specifically, such as Figure 2 As shown, one end of the threaded rod 5 passes through the side wall of the frame 4 and is connected to the frustum, while the other end is connected to a handle 6. By rotating the handle 6 outside the frame 4, the rotational motion of the threaded rod 5 is converted into linear motion, thereby driving the frustum to move continuously and stably along the axial direction, which is convenient for detecting its axial change value.

[0029] The top of the frame 4 has a strip-shaped opening 41, and the radial displacement detection device 2 slides within the strip-shaped opening 41 via a connecting part 22. The connecting part 22 includes a groove 23 and a slider 24. The radial displacement detection device 2 is disposed within the groove 23, and the strip-shaped opening 41 has a slide rail 8 corresponding to the slider 24. A scale 7 is provided on the frame 4 along the moving direction of the radial displacement detection device 2.

[0030] Specifically, such as Figures 3 to 5As shown, the displacement sensor is set in the groove 23, and the strip opening 41 is correspondingly provided with a slide rail 8 corresponding to the slider 24. Through the matching connection between the slider 24 and the slide rail 8, the sensor is connected to the frame 4 and relative to the object to be measured 3 to detect its position change. At the same time, this sliding structure allows the displacement sensor to move axially. A scale 7 is set in the direction of movement of the displacement sensor to perform a second measurement on the axial displacement and radial distance values ​​of the object to be measured 3 detected in the first measurement. In the first measurement, the object to be measured 3 moves and the axial displacement and radial distance values ​​are measured. In the second measurement, the object to be measured 3 remains stationary, and the sensor moves the same axial distance as in the first measurement according to the scale, and the radial distance is checked to see if it is the same as the value in the first measurement, thereby ensuring the accuracy of the detection results.

[0031] The axial displacement detection device 1 is a displacement sensor, which includes a spring rod 11 that passes through the side wall of the frame 4 and abuts against the object to be measured 3.

[0032] Specifically, such as Figure 2 As shown, a displacement sensor is provided at one end of the spring rod 11, and the end face of the truncated cone abuts against the displacement sensor. When the truncated cone moves in the direction close to the spring rod 11, the spring rod is compressed; when the truncated cone moves in the direction away from the spring rod, the spring rod moves accordingly, ensuring the accuracy of axial distance detection.

[0033] The frame 4 includes a mounting part 42 and a bracket 43. The mounting part 42 and the bracket 43 are fixedly connected by bolts. The axial displacement monitoring device 1 is installed on the bracket 43.

[0034] Specifically, such as Figure 3 As shown, the mounting part 42 is a cylindrical structure that houses the object to be measured 3. The mounting part 42 can be disassembled to remove the object to be measured 3 and install it on the spindle for application. The axial displacement monitoring device 1 is set on the bracket 43 so that the horizontal height of the sensor is the same as that of the object to be measured 3, which facilitates the measurement of axial distance. The overall structure of the bracket 4 is simple, easy to disassemble, and can be reused to save costs.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection device for a displacement measuring mechanism, characterized in that, It includes an axial displacement detection device (1), a radial displacement detection device (2), and a frame (4), wherein the axial displacement detection device (1) and the radial displacement detection device (2) are connected to the frame (4); The frame (4) has a test body (3) inside. The test body (3) is a frustum structure. The test body (3) is placed horizontally along the axial direction. The end face of the test body (3) abuts against the axial displacement detection device (1). The test body (3) is provided with a radial displacement detection device (2) in the radial direction. The radial displacement detection device (2) includes a detection end (21). When the test body (3) moves along the axial direction, the distance from the detection end (21) to the test body (3) changes. The top of the frame (4) is provided with a strip-shaped opening (41), and the radial displacement detection device (2) slides in the strip-shaped opening (41) through the connecting part (22); The connecting part (22) includes a groove (23) and a slider (24). The radial displacement detection device (2) is disposed in the groove (23). The strip opening (41) is provided with a slide rail (8) corresponding to the slider (24).

2. The detection device for a displacement measuring mechanism according to claim 1, characterized in that, It also includes a threaded rod (5) and a handle (6). The frame (4) is provided with a threaded hole. The threaded rod (5) is screwed into the threaded hole. One end of the threaded rod (5) is connected to the end face of the object to be tested (3), and the other end is connected to the handle (6).

3. The detection device for a displacement measuring mechanism according to claim 1, characterized in that, A scale (7) is provided on the frame (4) along the moving direction of the radial displacement detection device (2).

4. The detection device for a displacement measuring mechanism according to claim 1, characterized in that, The axial displacement detection device (1) is a displacement sensor, which includes a spring rod (11) that passes through the side wall of the frame (4) and abuts against the object to be tested (3).

5. The detection device for a displacement measuring mechanism according to claim 4, characterized in that, The frame (4) includes a mounting part (42) and a bracket (43). The mounting part (42) and the bracket (43) are fixedly connected by bolts. The axial displacement detection device (1) is installed on the bracket (43).

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