Deflection deformation detection device and method

Abstract

The invention discloses a flexural deflection detection device and method, and belongs to the technical field of flexural deflection measurement of machine tool parts. The detection device comprises a measuring scale, a support, an accurate measurement block, a displacement sensor, a push rod and a joint. The measuring scale is fixedly arranged, the support is installed on the measuring scale and can move in the length direction of the measuring scale, and the accurate measuring block is installed on the support and abuts against the surface of the measuring scale. A driving groove is formed in the support, the connector is installed on an object to be measured, one end of the push rod is installed on the connector, the other end of the push rod extends into the driving groove and can move up and down and left and right, the object to be measured moves to drive the push rod to push the support to move, and the displacement sensor is installed on the connector. The detection end of the detection block is opposite to the detection surface of the accurate detection block; the device can continuously measure the deflection deformation of the boring bar and the ram in the horizontal and vertical directions, does not need to be driven by external force, is driven by a measured part, improves the precision, and guarantees the reliability of test data.

Description

Technical Field

[0001] This invention relates to a testing device and method, and more particularly to a testing device and method for detecting the flexural deformation of machine tool boring bars and slides, belonging to the field of flexural deformation measurement technology for machine tool components. Background Technology

[0002] For precision CNC machine tools, measuring the deflection curves of the boring bar and slide is crucial for studying the compensation of boring bar and slide deflection and improving the machining accuracy of the machine tool. Currently, common boring bar deflection measurements are single-point measurements, such as measuring deformation at positions where the boring bar extends to 2, 4, or 6 times its diameter. This cannot accurately understand the deflection deformation of the boring bar throughout its entire stroke range, thus failing to accurately determine the deflection curve during the entire extension and retraction process. Existing testing methods typically use precision measuring blocks and straightedges in conjunction with dial indicators or micrometers. Because the measurement process involves repeatedly contacting and separating the precision measuring blocks and dial indicators, measurement errors are increased, thus failing to accurately reflect the deformation of the boring bar. Furthermore, most existing testing methods only measure deformation in the vertical direction, neglecting to measure horizontal deflection deformation, resulting in an incomplete measurement. Summary of the Invention

[0003] (a) Technical problems to be solved The technical problem to be solved by the present invention is to address the issue that existing flexural deformation detection technologies cannot accurately and continuously measure the flexural deformation curves of boring bars and slides.

[0004] (II) Technical Solution To address the aforementioned technical problems, this invention provides a flexural deformation detection device for detecting the flexural deformation of a test object (such as a boring bar and a slide block, or other structures requiring flexural deformation detection). The device includes a measuring scale, a support, a precision measuring block, a displacement sensor, a push rod, and a connector. The measuring scale is fixedly positioned in the direction of movement of the test object. The support is mounted on the measuring scale and can move along the length of the measuring scale. The precision measuring block is mounted on the support and abuts against the surface of the measuring scale. A drive groove is provided on the support. The connector is mounted on the test object. One end of the push rod is mounted on the connector, and the other end extends into the drive groove and can move up and down and left and right. The movement of the test object drives the push rod to move the support. The displacement sensor is mounted on the connector, and its detection end is positioned directly opposite the detection surface of the precision measuring block. With the above structural setup, the movement of the object under test drives the push rod to move the support. During this process, the object under test undergoes flexural deformation, which is transmitted to the displacement sensor. The displacement sensor then obtains the flexural deformation data of the object under test by detecting the displacement change between the object and the detection surface of the precision measuring block. Real-time detection and accurate measurement can be achieved.

[0005] Furthermore, the precision measuring block includes a horizontal precision measuring block and a vertical precision measuring block, and the displacement sensor includes a horizontal displacement sensor and a vertical displacement sensor. The horizontal precision measuring block abuts against the vertical side of the measuring ruler, and the vertical precision measuring block abuts against the horizontal surface of the measuring ruler. The detection ends of the horizontal and vertical displacement sensors are respectively opposite to the outer surface of the horizontal precision measuring block and the upper surface of the vertical precision measuring block. This structure enables the measurement of flexural deformation of the object under test in both horizontal and vertical directions.

[0006] Furthermore, this design also includes a pressure mechanism. The pressure mechanism is positioned on the support corresponding to the location where the precision measuring block is installed. Pressure mechanisms are also positioned on opposite sides of the precision measuring block. Each pressure mechanism includes a pressure rod, one end of which abuts against the precision measuring block, with the end face of the rod being spherical to ensure point contact. On one hand, the pressure mechanism presses the precision measuring block firmly, maintaining effective contact with the measuring scale. On the other hand, the symmetrically arranged pressure mechanisms apply force to the precision measuring block, further ensuring effective contact between the precision measuring block and the measuring scale from all directions, thereby guaranteeing the reliability of the measurement data. Furthermore, the pressure mechanism also includes a stud, a first spring, an adjusting arm, an adjusting nut, a limiting nut, and a second spring. The stud is fixed to the support. One end of the adjusting arm passes through the stud, and the other end passes through the pressure rod. The adjusting nut is threaded to the end of the stud away from the support, and the limiting nut is threaded to the end of the pressure rod away from the support. Limiting platforms are respectively provided on the stud and the pressure rod. The first spring is provided on the stud between the limiting platform on the stud and the adjusting arm, and the second spring is provided on the pressure rod between the limiting platform on the pressure rod and the adjusting arm. By turning the adjusting nut, the position of the adjusting arm on the stud is adjusted, thereby adjusting the preload of the pressure rod on the precision measuring block.

[0007] Furthermore, the pressure mechanism also includes steel balls and a third spring. The adjusting arm has a rotating hole, and a stud within the rotating hole has a through hole. The third spring is housed within the through hole, with the steel balls positioned at both ends. Multiple triangular grooves are arranged in a circumferential array on the inner wall of the rotating hole. These triangular grooves accommodate the steel balls when ejected, thus limiting the rotation angle of the adjusting arm. When the tangential force of the adjusting arm exceeds the elastic force of the third spring, the adjusting arm can rotate freely.

[0008] Furthermore, this design also includes a first cam bearing, a first side plate, a second side plate, and a pressure plate. The first side plate and the second side plate are respectively disposed on opposite sides of the support, and the pressure plate is disposed on the lower side of the first side plate and the second side plate. A preload screw and a guide rod are respectively disposed between the first side plate, the second side plate, and the corresponding pressure plate. A butterfly spring is disposed on the guide rod. The first cam bearing is horizontally disposed on the pressure plate. The first cam bearing cooperates with the support to achieve vertical positioning of the measuring scale. The cam bearing provides positioning with low frictional resistance and reliable contact. The contact force between the first cam bearing and the measuring scale abutment surface can be adjusted by adjusting the preload force of the preload screw.

[0009] Furthermore, a vertical detection groove is provided in the middle of the support, and a horizontal detection port is provided on the second side plate. The pressure plate is disposed in the horizontal detection port to form a horizontal detection groove. The vertical precision measuring block and the horizontal precision measuring block are respectively placed in the vertical detection groove and the horizontal detection groove. Limiting blocks are respectively provided on the second side plate located on one side opposite to the horizontal detection groove. Limiting grooves are respectively provided on the limiting blocks and on the support located on one side opposite to the vertical detection groove. The stud of the pressure mechanism is disposed in the limiting groove, and one end of the adjusting arm extends into the limiting groove. The vertical and horizontal detection grooves facilitate the installation of the vertical and horizontal precision measuring blocks. The limiting grooves accommodate the rotation of the pressure mechanism and limit the rotation angle range of the pressure mechanism.

[0010] Furthermore, this design also includes second cam bearings. Second cam bearings are vertically arranged on both the left and right sides of the support. Second cam bearings are also located at the front and rear ends of one side of the support, and a third side plate is provided on the other side, with the second cam bearings mounted on the third side plate. A preload screw and a guide rod are provided between the third side plate and the support, and a disc spring is mounted on the guide rod. The second cam bearings on both sides limit the support's movement in the left and right directions of the measuring scale. The cam bearings provide this limitation, resulting in low frictional resistance and reliable contact. The contact force between the second cam bearing and the measuring scale's contact surface can be adjusted by adjusting the preload force of the preload screw.

[0011] The support and other structures are clamped onto the measuring scale by a first cam bearing and a second cam bearing arranged opposite to each other. Gaps (e.g., 0.5-1mm) are left between the upper and left / right surfaces of the measuring scale and the lower surface of the support, the inner surface of the first side plate, and the inner surface of the second side plate, respectively. This allows for a rolling connection between the support and related assembly structures and the measuring scale, while a sliding connection is established between the horizontal and vertical precision measuring blocks and the measuring scale. The pressure mechanism further enhances the effect, as the support rolls and pushes the horizontal and vertical precision measuring blocks along the measuring scale, resulting in more accurate measurements. The main function of the support is to provide a stable thrust to the precision measuring blocks, stabilizing their movement trajectory along the length of the measuring scale. Additionally, the pressure mechanism provides a constant pressure (perpendicular to the measuring surface) to the precision measuring blocks, preventing them from floating during movement and affecting the measurement results.

[0012] Furthermore, this design also includes adjusting brackets, with adjusting brackets respectively installed at both ends of the measuring scale. Each adjusting bracket has a C-shaped bayonet, and adjusting screws are installed on three side walls of the C-shaped bayonet. The adjusting screws pass through the side walls of the C-shaped bayonet and abut against the measuring scale. The adjusting brackets also have at least two sets of oblong holes, into which bolt assemblies pass. Using the adjusting screws, the position of the measuring scale in the left-right and front-back directions of the machine tool can be accurately adjusted and positioned. In addition, when the support moves along the measuring scale, the adjusting screws also prevent displacement of the measuring scale in the direction of support movement, further ensuring measurement accuracy.

[0013] On the other hand, the present invention also provides a method for detecting flexural deformation, which uses the aforementioned flexural deformation detection device to detect the flexural deformation of a machine tool boring bar and slide, and includes the following steps: S1. Clean the machine tool worktable and measuring ruler, and install the measuring ruler on the worktable; S2. Install the support and precision measuring block to ensure effective contact between the precision measuring block and the measuring scale; S3. Install one end of the push rod onto the machine tool boring bar or slide bar via the connector, and install the other end into the drive slot; S4. Install the displacement sensor and connect it to the data acquisition instrument; S5. Start the data acquisition instrument and move the machine tool boring bar or slide to perform the test; S6. Plot a curve based on the detection data of the displacement sensor to obtain the deflection deformation curve of the boring bar or slide.

[0014] (III) Beneficial Effects The above-described technical solution of the present invention has the following advantages: This invention proposes a continuous flexural deformation detection device and method for continuously measuring the flexural deformation curves of a machine tool boring bar and slide during their extension process, solving the problem of the inability to accurately and continuously measure the flexural deformation curves of boring bars and slides in current methods. The proposed flexural deformation detection device can measure the flexural deformation of the boring bar and slide in both horizontal and vertical directions. This device requires no external force drive, using the component under test for propulsion, thus improving the accuracy of position and deformation and ensuring the reliability of test data. The detection device employs a non-contact measurement method, further improving measurement accuracy and solving the problem of decreased measurement accuracy caused by direct contact in existing detection methods.

[0015] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions as described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings. 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 only 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 a schematic diagram of the isometric view of the detection device of the present invention.

[0018] Figure 2 This is a schematic cross-sectional view of the detection device of the present invention.

[0019] Figure 3 This is a schematic diagram of the detection device of the present invention with the measuring ruler concealed.

[0020] Figure 4 for Figure 3 A schematic diagram from another perspective after concealing structures such as displacement sensors.

[0021] Figure 5 for Figure 4 Another perspective illustration.

[0022] Figure 6 This is a schematic cross-sectional view of the pressure mechanism of the present invention.

[0023] Figure 7 This is a top view schematic diagram of the adjustable support arm of the present invention.

[0024] Figure 8 This is a schematic diagram of the pressure plate of the present invention and its assembly with preload screws, etc.

[0025] Figure 9 for Figure 8 Schematic diagram of cross-section.

[0026] Figure 10 This is a schematic diagram of the third side plate of the present invention and its assembly with preload screws, etc.

[0027] Figure 11 for Figure 10 Schematic diagram of cross-section.

[0028] Figure 12 This is a schematic diagram of the support of the present invention viewed from below using an isometric view.

[0029] Figure 13 This is a schematic diagram of the support of the present invention from a top-view axonometric perspective.

[0030] Figure 14 This is a schematic diagram of the isometric projection of the push rod of the present invention.

[0031] Figure 15 This is a schematic diagram of the assembly of the push rod and the magnetic base of the present invention.

[0032] Figure 16 This is a schematic diagram of the detection device of the present invention installed on the boring bar of a machine tool.

[0033] Figure 17 This is a schematic diagram of the assembly of the detection device and boring bar of the present invention.

[0034] Figure 18 This is a schematic diagram of the deflection deformation curve plotted after measurement using the method of the present invention.

[0035] In the diagram: 1. Measuring ruler; 2. Support; 3. Push rod; 4. Connector; 5. Drive groove; 6. Horizontal precision measuring block; 7. Vertical precision measuring block; 8. Horizontal displacement sensor; 9. Vertical displacement sensor; 10. Pressure mechanism; 11. Pressure rod; 12. Stud; 13. First spring; 14. Adjusting arm; 15. Adjusting nut; 16. Limit nut; 17. Second spring; 18. Steel ball; 19. Third spring; 20. Rotating hole; 21. Triangular groove; 22. First cam bearing; 23. First side plate; 24. Second side plate; 25. 26. Pressure plate; 27. Preload screw; 28. Guide rod; 29. ​​Butterfly spring; 30. Vertical detection groove; 31. Horizontal detection groove; 32. Limiting block; 33. Limiting groove; 34. Second cam bearing; 35. Third side plate; 36. Adjusting bracket; 37. Adjusting screw; 38. Rear bed; 39. Column slide; 40. Column; 41. Roller seat; 42. Boring rod; 43. Front bed; 44. Worktable slide; 45. Worktable; 46. Hydraulic gauge base; 47. Clearance hole; 48. Magnetic gauge base; 49. Double-ended screw. Detailed Implementation

[0036] 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.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Example 1, such as Figure 1-5 As shown in Figures 16-17, a flexural deformation detection device is used to detect the flexural deformation of a machine tool boring bar 42. The machine tool, taking a planer-type machine tool as an example, mainly includes a rear bed 37, a column slide 38, a column 39, a ram seat 40, a ram 41, a boring bar 42, a front bed 43, a worktable slide 44, and a worktable 45. The specific connection relationships and working processes between the various structures of the machine tool are existing technologies and will not be described in detail here.

[0039] The flexural deformation detection device described in this embodiment includes a measuring scale 1, a support 2, a precision measuring block, a displacement sensor, a push rod 3, and a connector 4 (a heavy-duty tool holder). The measuring scale 1 is fixedly mounted on the worktable. The support 2 is mounted on the measuring scale 1 and can move along the length of the measuring scale 1. The precision measuring block is mounted on the support 2 and abuts against the surface of the measuring scale 1. The support 2 is provided with a drive groove 5, and the drive groove 5 is provided at both the front and rear ends of the support 2. The drive groove 5 is a strip-shaped groove, and the upper edge is chamfered (for guidance) to facilitate the insertion of the push rod 3. The connector 4 is mounted on the boring bar 42 (specifically, a tapered hole is provided at the free end of the boring bar 42, and the connector 4 is installed in the tapered hole, which can be an interference fit, snap-fit, threaded connection, or screw fixation, etc.). One end of the push rod 3 is mounted on the connector 4, and the other end extends into the drive groove 5 and can move up and down and left and right. The end of the push rod 3 that extends into the drive groove 5 is provided with a ball head (a screw is provided on the ball head and threadedly connected to the end of the push rod 3). There is a small gap between the ball head and the drive groove 5. The movement of the boring bar 42 drives the push rod 3 to push the support 2 to move. The displacement sensor is mounted on the connector 4 via a hydraulic gauge base 46 (magnetic gauge base) (or mounted on the end of the boring bar 42, while the displacement sensor is mounted on the clamp of the magnetic gauge base), and its detection end is set facing the detection surface of the precision measuring block.

[0040] It should be noted that the measuring ruler 1 must be scraped to a precision of 000 grade square ruler, and the parallelism of the upper and lower surfaces, the parallelism of the left and right sides, and the perpendicularity of the upper and left and right sides of the measuring ruler 1 must meet the precision grade requirements (for example, if the design length of the square ruler is 1m, then the flatness requirement is 1.5μm, the parallelism requirement is 3.0μm, and the perpendicularity requirement is 3.0μm). The adjacent surfaces (or contact surfaces) of the measuring ruler 1 and the first cam bearing 22 mentioned below must be machined to make them parallel to the upper surface of the measuring ruler 1.

[0041] Furthermore, the reason for not using a displacement sensor to directly measure the surface of measuring ruler 1 is that when measuring ruler 1 is made of cast iron, it is usually obtained by scraping, and its uneven surface will lead to excessive measurement data error. When measuring ruler 1 is made of marble or other non-metallic materials, although its surface quality is better, common high-precision capacitive and eddy current displacement sensors cannot identify and collect data.

[0042] More specifically, the precision measuring block includes a horizontal precision measuring block 6 and a vertical precision measuring block 7, and the displacement sensor includes a horizontal displacement sensor 8 and a vertical displacement sensor 9; the horizontal precision measuring block 6 abuts against the vertical side of the measuring ruler 1, the vertical precision measuring block 7 abuts against the horizontal surface of the measuring ruler 1, and the detection ends of the horizontal displacement sensor 8 and the vertical displacement sensor 9 are respectively opposite to the outer side of the horizontal precision measuring block 6 and the upper surface of the vertical precision measuring block 7.

[0043] Example 2 is a further optimization and refinement of the detection device based on Example 1. The flexural deformation detection device described in this example also includes a pressure mechanism 10. The pressure mechanism 10 is installed on the support 2 at the position corresponding to the installation of the precision measuring block. The pressure mechanism 10 is also installed on one opposite side of the precision measuring block, as shown below. Figure 6-7 As shown, the pressure mechanism 10 includes a pressure rod 11, one end of which abuts against the precision measuring block, and the end face of the pressure rod 11 abutting against the precision measuring block is set as a spherical surface. In this embodiment, the pressure mechanism 10 further includes a stud 12 (thread not shown in the drawings), a first spring 13, an adjusting arm 14, an adjusting nut 15, a limiting nut 16, and a second spring 17. The stud 12 is fixed to the support 2. One end of the adjusting arm 14 passes through the stud 12, and the other end passes through the pressure rod 11. The adjusting nut 15 is threaded to the end of the stud 12 away from the support 2, and the limiting nut 16 is threaded to the end of the pressure rod 11 away from the support 2. Limiting platforms are respectively provided on the stud 12 and the pressure rod 11. The first spring 13 is provided on the stud 12 between the limiting platform on the stud 12 and the adjusting arm 14, and the second spring 17 is provided on the pressure rod 11 between the limiting platform on the pressure rod 11 and the adjusting arm 14.

[0044] More specifically, the pressure mechanism 10 also includes a steel ball 18 and a third spring 19. The adjusting arm 14 is provided with a rotating hole 20. The stud 12 located in the rotating hole 20 is provided with a through hole. The third spring 19 is provided in the through hole. The steel ball 18 is provided at both ends of the third spring 19. A plurality of triangular grooves 21 are arranged in a circumferential array on the inner wall of the rotating hole 20.

[0045] Example 3 is a further optimization and refinement of the detection device based on Example 2. The flexural deformation detection device described in this example further includes a first cam bearing 22, a first side plate 23, a second side plate 24, and a pressure plate 25. The first side plate 23 and the second side plate 24 are respectively disposed on opposite sides of the support 2. The pressure plate 25 is disposed on the lower side of the first side plate 23 and the second side plate 24 (an adjustment gap of 1mm is left between the first side plate 23 and the second side plate 24 and the corresponding pressure plate 25). Pre-tightening screws 26 and guide rods 27 are respectively disposed between the first side plate 23 and the second side plate 24 and the corresponding pressure plate 25. A butterfly spring 28 is disposed on the guide rod 27. Figure 8-9 As shown, the first cam bearing 22 is horizontally disposed on the pressure plate 25.

[0046] It should be noted that the support 2 is provided with grooves at the positions for installing the first side plate 23 and the second side plate 24 to receive the first side plate 23 and the second side plate 24, and each right angle of the groove is provided with a gap-eliminating hole 47 to ensure effective contact between the surfaces.

[0047] More specifically, such as Figure 12-13 As shown, a vertical detection groove 29 is provided in the middle of the support 2, and a horizontal detection port is provided on the second side plate 24. The pressure plate 25 is provided in the horizontal detection port to form a horizontal detection groove 30. The vertical precision measuring block 7 and the horizontal precision measuring block 6 are respectively placed in the vertical detection groove 29 and the horizontal detection groove 30. Limiting blocks 31 are respectively provided on the second side plate 24 located on one side opposite to the horizontal detection groove 30. Limiting grooves 32 are respectively provided on the limiting blocks 31 and the support 2 located on one side opposite to the vertical detection groove 29. The stud 12 of the pressure mechanism 10 is provided in the limiting groove 32, and one end of the adjusting arm 14 extends into the limiting groove 32.

[0048] It should be noted that the four sides of the vertical detection groove 29 have good surface quality and are perpendicular to the upper surface of the measuring ruler 1. Clearance holes 47 are provided at the four right angles of the vertical detection groove 29 to ensure effective surface-to-surface contact. A 0.5mm gap is maintained between the vertical precision measuring block 7 and the four sides of the vertical detection groove 29. Clearance holes 47 are also provided at the two right angles of the horizontal detection port to ensure the machining accuracy of the horizontal detection port surface.

[0049] The flexural deformation detection device described in this embodiment also includes a second cam bearing 33. The support 2 has two vertically arranged second cam bearings 33 on its left and right sides respectively. The support 2 has two second cam bearings 33 at its front and rear ends on one side, and a third side plate 34 (with a 1mm adjustment gap between the third side plate 34 and the support 2) on the other side. The second cam bearings 33 are mounted on the third side plate 34. A preload screw 26 and a guide rod 27 are provided between the third side plate 34 and the support 2. A butterfly spring 28 is mounted on the guide rod 27. Figure 10-11 As shown.

[0050] Example 4 is a further optimization and refinement of the detection device based on Example 3. The flexural deformation detection device described in this example further includes an adjusting bracket 35. The adjusting bracket 35 is respectively provided at both ends of the measuring scale 1. The adjusting bracket 35 is provided with a C-shaped bayonet, and adjusting screws 36 are respectively provided on the three side walls of the C-shaped bayonet. The adjusting screws 36 pass through the side walls of the C-shaped bayonet and abut against the measuring scale 1. The adjusting bracket 35 is also provided with at least two sets of oblong holes, and bolt assemblies pass through the oblong holes.

[0051] Example 5 differs from Example 4 only in that it is used to measure the flexural deformation of the slide 41, and the specific structure and connection relationship of the joint 4 are different, such as... Figure 14-15 As shown, in this embodiment, a magnetic base 48 is used as a connector 4 to be attached to the front end of the slide block 41, and the push rod 3 is connected to the magnetic base 48 by a double-ended screw 49. Since there are enough mounting positions on the slide block 41, each displacement sensor can also be directly mounted on the slide block 41 using the magnetic base.

[0052] Example 6: This example provides a method for detecting flexural deformation, which uses the flexural deformation detection device described in the above examples to detect the flexural deformation of the machine tool boring bar 42 and the slide, and includes the following steps: S1. Clean the machine tool worktable 45 and measuring ruler 1. Install the measuring ruler 1 on the worktable 45 and adjust it to a suitable position. Adjust it horizontally using the adjusting screw 36, and level it vertically using a feeler gauge. Specifically, use a dial indicator attached to the machine tool spindle. Move the machine tool's Z-axis (the column moves back and forth) to adjust the upper and left sides of the measuring ruler, ensuring that the upper and left sides of the measuring ruler are within the error range parallel to the Z-axis. Using a dial indicator is a common adjustment method. Moving the Z-axis is equivalent to using the Z-axis as a reference (using the straight line along the Z-axis as the reference). Place the dial indicator horizontally to calibrate the left side of the measuring ruler, adjusting the corresponding adjusting screws during the process to make the left side of the measuring ruler parallel to the Z-axis. When moving the Z-axis to calibrate the upper surface of the measuring ruler, a feeler gauge (existing technology) needs to be inserted into the bottom of the measuring ruler for adjustment to keep the upper surface parallel to the Z-axis (a level can also be used to adjust the upper surface of the measuring ruler to keep it horizontal). S2. Install support 2 and adjust the preload of the cam bearings in the horizontal and vertical directions; install the precision measuring block and adjust the pressure of the pressure mechanism 10 on the precision measuring block so that the precision measuring block effectively contacts the measuring scale 1. S3. Install one end of the push rod 3 onto the machine tool boring bar 42 or slide block through the connector 4, and install the other end into the drive slot 5; S4. Install the displacement sensor and connect it to the data acquisition instrument; S5. Start the data acquisition instrument and move the machine tool boring bar 42 or slide for testing; during testing, set the moving speed of the boring bar or slide to v mm / min, and set the sampling rate of the data acquisition instrument to f. s At the position of the nth measurement point, the time is: The location is: The value of the vertical displacement sensor is σ1, and the value of the horizontal displacement sensor is σ2. S6. Plot a curve based on the detection data from the displacement sensor to obtain the deflection deformation curve of the boring bar or slide, such as... Figure 18As shown. Plotting L as the abscissa and σ1 as the ordinate, we can obtain the deflection curve of the boring bar or slide in the vertical direction. Plotting L as the abscissa and σ2 as the ordinate, we can obtain the deflection curve of the boring bar in the horizontal direction.

[0053] Furthermore, in the description of the invention, unless otherwise stated, the terms "multiple," "multiple roots," and "multiple groups" mean two or more, and "several," "several roots," and "several groups" mean one or more. In the description of the invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A flexural deformation detection device for detecting the flexural deformation of an object to be tested, characterized in that: It includes measuring ruler (1), support (2), precision measuring block, displacement sensor, push rod (3) and joint (4); The measuring ruler (1) is fixedly arranged, the support (2) is installed on the measuring ruler (1) and can move along the length direction of the measuring ruler (1), and the precision measuring block is installed on the support (2) and abuts against the surface of the measuring ruler (1); The driving groove (5) is arranged on the support (2), the joint (4) is installed on the object to be measured, one end of the push rod (3) is installed on the joint (4), the other end of the push rod (3) extends into the driving groove (5) and can move up and down and left and right, the object to be measured moves to drive the push rod (3) to push the support (2) to move, and the displacement sensor is installed on the joint (4), and the detection end of the displacement sensor is arranged opposite to the detection surface of the precision measuring block.

2. The flexure deformation detection apparatus according to claim 1, characterized by: The precision measuring block includes horizontal precision measuring block (6) and vertical precision measuring block (7), and the displacement sensor includes horizontal displacement sensor (8) and vertical displacement sensor (9); The horizontal precision measuring block (6) abuts against the vertical side surface of the measuring ruler (1), the vertical precision measuring block (7) abuts against the horizontal surface of the measuring ruler (1), and the detection ends of the horizontal displacement sensor (8) and the vertical displacement sensor (9) are respectively opposite to the outer side surface of the horizontal precision measuring block (6) and the upper surface of the vertical precision measuring block (7).

3. The flexure deformation detection apparatus of claim 2, wherein: It also includes a pressure mechanism (10), the support (2) is provided with the pressure mechanism (10) corresponding to the position of the precision measuring block, and the opposite side of the precision measuring block is respectively provided with the pressure mechanism (10), the pressure mechanism (10) includes a pressure rod (11), one end of the pressure rod (11) abuts against the precision measuring block, and the end face abutting against the precision measuring block is provided as a spherical surface.

4. The flexure deformation detection apparatus according to claim 3, characterized by: The pressure mechanism (10) further includes a stud (12), a first spring (13), an adjusting arm (14), an adjusting nut (15), a limiting nut (16) and a second spring (17); The stud (12) is fixed on the support (2), one end of the adjusting arm (14) is arranged on the stud (12), and the other end of the adjusting arm (14) is arranged on the pressure rod (11), the adjusting nut (15) is threadedly connected with the end of the stud (12) away from the support (2), and the limiting nut (16) is threadedly connected with the end of the pressure rod (11) away from the support (2); The stud (12) and the pressure rod (11) are respectively provided with limiting blocks, the first spring (13) is arranged between the limiting block on the stud (12) and the adjusting arm (14), and the second spring (17) is arranged between the limiting block on the pressure rod (11) and the adjusting arm (14).

5. The flexure deformation detection apparatus of claim 4, wherein: The pressure mechanism (10) further includes a steel ball (18) and a third spring (19), the adjusting arm (14) is provided with a rotating hole (20), the stud (12) in the rotating hole (20) is provided with a through hole, the third spring (19) is arranged in the through hole, the two ends of the third spring (19) are respectively provided with the steel ball (18), and a plurality of triangular grooves (21) are circumferentially arranged on the inner wall of the rotating hole (20).

6. The flexure deformation detection apparatus of any of claims 4-5, wherein: Further comprising a first cam bearing (22), a first side plate (23), a second side plate (24) and a pressing plate (25), the opposite sides of the support (2) are respectively provided with the first side plate (23) and the second side plate (24), the lower sides of the first side plate (23) and the second side plate (24) are respectively provided with the pressing plate (25), the first side plate (23) and the second side plate (24) and the corresponding pressing plate (25) are respectively provided with a pre-tightening screw (26) and a guide rod (27), the guide rod (27) is provided with a butterfly spring (28), and the first cam bearing (22) is horizontally arranged on the pressing plate (25).

7. The flexure deformation detection apparatus of claim 6, wherein: The middle of the support (2) is provided with a vertical detection groove (29), the second side plate (24) is provided with a horizontal detection port, the pressing plate (25) is arranged in the horizontal detection port to form a horizontal detection groove (30), and the vertical detection groove (29) and the horizontal detection groove (30) are respectively arranged with the vertical fine measuring block (7) and the horizontal fine measuring block (6); The second side plate (24) on one side of the horizontal detection groove (30) is respectively provided with a limiting block (31), the limiting block (31) and the support (2) on one side of the vertical detection groove (29) are respectively provided with a limiting groove (32), the stud (12) of the pressure mechanism (10) is arranged in the limiting groove (32), and one end of the adjusting arm (14) extends into the limiting groove (32).

8. The flexure deformation detection apparatus of claim 6, wherein: Further comprising a second cam bearing (33), the left and right sides of the support (2) are respectively vertically provided with the second cam bearing (33), the front and rear ends of one side of the support (2) are respectively provided with the second cam bearing (33), and the other side is provided with a third side plate (34), and the third side plate (34) is provided with the second cam bearing (33); The third side plate (34) and the support (2) are provided with a pre-tightening screw (26) and a guide rod (27), and the guide rod (27) is provided with a butterfly spring (28).

9. The flexure deformation detection apparatus of claim 1, wherein: Further comprising an adjusting clamping seat (35), the two ends of the measuring scale (1) are respectively provided with the adjusting clamping seat (35), the adjusting clamping seat (35) is provided with a C-shaped clamping hole, and the three side walls of the C-shaped clamping hole are respectively provided with adjusting screws (36), the adjusting screws (36) pass through the side walls of the C-shaped clamping hole and abut against the measuring scale (1); The adjusting clamping seat (35) is further provided with at least two groups of waist-shaped holes, and a bolt assembly is arranged in the waist-shaped hole.

10. A method of detecting flexural deformation, characterized by: The deflection deformation detection device of any one of claims 1-5 is used for detecting the deflection deformation of a machine tool boring bar (42) and a ram (41), and comprises the following steps: S1, cleaning the machine tool workbench (45) and the measuring scale (1), and installing the measuring scale (1) on the workbench; S2, installing the support (2) and the fine measuring block, so that the fine measuring block effectively contacts the measuring scale (1); S3, one end of the push rod (3) is installed on the machine tool boring bar (42) or the ram (41) through the joint (4), and the other end is installed in the driving groove (5). S4, install displacement sensor and connect it to data acquisition instrument; S5, start data acquisition instrument, move machine tool boring bar (42) or ram (41) to detect; S6, draw curve according to displacement sensor detection data to obtain deflection deformation curve.

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