An automated detection platform for electric spindles

Abstract

The application provides an automatic detection platform of an electric spindle, comprising a base, a first detection device, a second detection device and a tool changing mechanism; the first detection device is used for detecting the run-out value of the spindle; the second detection device is used for detecting the vibration value of the spindle; the tool changing mechanism is arranged on the base and is used for changing the tool of the spindle. The automatic detection platform of the electric spindle disclosed by the application detects the run-out value of the spindle through the first detection device, detects the vibration value of the spindle through the second detection device, can realize automatic tool changing and detection rod changing during the detection process, and can realize automatic conversion of the run-out value detection and the vibration value detection, so that the detection speed is fast and the detection precision is high.

Description

Technical Field

[0001] This invention relates to the field of electric spindle inspection, and more particularly to an automated inspection platform for electric spindles. Background Technology

[0002] The spindle of a machine tool needs to be inspected after production to ensure its accuracy, so that the workpiece can be machined precisely.

[0003] Currently, the detection of spindle vibration and runout values ​​is mainly done manually. During the spindle's rotation, the detector is manually changed, and in different inspection items, the spindle is manually removed from the previous inspection step and placed in the next inspection position. This inspection method is slow, inefficient, and lacks accuracy. Summary of the Invention

[0004] This invention provides an automated testing platform for electric spindles to solve the above-mentioned problems.

[0005] An automated inspection platform for an electric spindle includes: a base, a first inspection device, a second inspection device, and a tool changing mechanism;

[0006] The first detection mechanism includes a mounting base, a Y-axis moving device, a Z-axis moving device, and a detection platform; the mounting base is fixed to the side of the base, the mounting base is equipped with the Z-axis moving device, the Z-axis moving device is equipped with the Y-axis moving device, and the Y-axis moving device is equipped with the detection platform; the detection platform is equipped with a proximal runout detector and a distal runout detector, and the proximal runout detector and the distal runout detector are located on the same Y-axis;

[0007] The second testing mechanism includes a soft-base platform, a hard-base platform, and a lifting structure;

[0008] The hard base platform is fixed to the base, and the soft base platform includes a frame, a first base and a second base. The first base and the second base are fixed to the frame, and the frame is sleeved on the hard base platform. The first base and the second base are respectively located on both sides of the soft base platform.

[0009] The lifting structure is fixed to the base, and the lifting structure is provided with a guide rail on the side facing the soft base platform, so that the soft base platform can move up and down along the guide rail;

[0010] The tool changing mechanism is located on the base.

[0011] Furthermore, the first detection mechanism also includes an X-axis moving device, which is mounted on the Z-axis moving device, and the Y-axis moving device is mounted on the X-axis moving device;

[0012] The detection platform includes a first detection plate perpendicular to the Z-axis and a second detection plate perpendicular to the Y-axis. The second detection plate is fixed to the end of the first detection plate. The second detection plate is provided with an internal hole runout detector and an end face runout detector. The first detection plate is provided with a proximal runout detector and a distal runout detector.

[0013] Furthermore, the Z-axis moving device includes a hydraulic cylinder arranged along the Z-axis, the cylinder body of the hydraulic cylinder is fixed on the base, and the piston rod end of the hydraulic cylinder is fixedly connected to the X-axis moving device;

[0014] The X-axis moving device includes an X-axis guide rail, an X-axis slider, and an X-axis motor. The X-axis motor drives a lead screw to rotate. The X-axis slider is provided with a lead screw nut. The X-axis motor drives the X-axis slider to move along the X-axis guide rail through the lead screw and the lead screw nut. The X-axis slider is provided with the Y-axis moving device.

[0015] The Y-axis moving device includes a Y-axis guide rail, a Y-axis slider, and a Y-axis motor. The Y-axis motor drives the Y-axis slider to move along the Y-axis guide rail, and the detection platform is provided on the Y-axis slider.

[0016] Furthermore, the first detection plate includes a first support portion and a second support portion. The second detection plate is fixed on the first support portion. One end of the second support portion is connected to the first support portion, and the other end extends along the Y-axis away from the main shaft to be tested. The proximal runout detector and the distal runout detector are disposed on the second support portion.

[0017] Furthermore, the lifting structure includes a frame, a motor, a lead screw, and a lead screw nut. The frame is provided with the guide rail. The frame is connected to the guide rail via a slider. The frame has a connecting part, which is located between two of the guide rails and connected to the lead screw via the lead screw nut. The motor is located on the frame and drives the lead screw to rotate.

[0018] Furthermore, the frame is equipped with a first sensor and a second sensor, the first sensor being used to detect the rising position of the frame and the second sensor being used to detect the falling position of the frame.

[0019] Furthermore, both the first base and the second base are provided with EVA sponge, and the EVA sponge has a V-shaped bearing surface.

[0020] Furthermore, the base is provided with a first mounting surface and a second mounting surface, the first mounting surface being higher than the second mounting surface, the hard base platform being mounted on the first mounting surface, and the lifting structure being mounted on the second mounting surface.

[0021] Furthermore, it also includes a testing fixture, which is mounted on the hard base platform and sleeved on the spindle to be tested. The testing fixture is provided with a positioning groove, and the hard base platform is provided with a positioning cylinder. The piston rod of the positioning cylinder can extend into the positioning groove in the horizontal direction.

[0022] Furthermore, the tool changing mechanism includes tool magazines located on both sides of the second detection mechanism and a robotic arm located on the tool magazines.

[0023] The present invention discloses an automated testing platform for an electric spindle. The platform detects the spindle runout value through a first testing device and the spindle vibration value through a second testing device. During the testing process, it can realize automatic tool changing and test bar changing, and can realize automatic conversion between runout value detection and vibration value detection. The testing speed is fast and the testing accuracy is high. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of an automated testing platform structure for an electric spindle disclosed in an embodiment of the present invention;

[0026] Figure 2 This is a rear view structural diagram of an automated inspection platform for an electric spindle disclosed in an embodiment of the present invention;

[0027] Figure 3 This is a structural diagram of the second detection device disclosed in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of an automated testing platform for an electric spindle after removing the tool magazine, as disclosed in an embodiment of the present invention.

[0029] Figure 5 for Figure 4 Enlarged view of section A;

[0030] Figure 6 A schematic diagram of the structure of the first detection device in this embodiment of the invention;

[0031] Figure 7 for Figure 6 Enlarged view of section B;

[0032] Figure 8 This is a schematic diagram of the detection platform structure in an embodiment of the invention.

[0033] In the picture:

[0034] 1. Base; 11. First mounting surface; 12. Second mounting surface;

[0035] 2. First detection device; 21. Mounting base; 22. X-axis moving device; 23. Y-axis moving device; 24. Z-axis moving device; 25. Detection platform; 26. First detection plate; 27. Second detection plate; 28. Internal hole runout detector; 29. ​​End face runout detector; 30. Proximal runout detector; 301. Distal runout detector; 302. First support part; 303. Second support part;

[0036] 3. Second detection device;

[0037] 31. Soft base platform; 311. Frame; 312. First base; 313. Second base; 314. Connecting part; 315. EVA foam;

[0038] 32. Hard base platform; 321. Positioning cylinder;

[0039] 33. Lifting structure; 331. Guide rail; 332. Frame; 333. Motor; 334. First sensor; 335. Second sensor;

[0040] 34. Inspection fixture; 35. Positioning slot; 36. Spindle to be inspected.

[0041] 4. Tool changing mechanism; 41. Tool magazine; 42. Robotic arm. Detailed Implementation

[0042] 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.

[0043] like Figure 1-8 As shown, this embodiment discloses an automated testing platform for an electric spindle, including: a base, a first testing device, a second testing device, and a tool changing mechanism;

[0044] The first detection mechanism includes a mounting base, a Y-axis moving device, a Z-axis moving device, and a detection platform; the mounting base is fixed to the side of the base, the mounting base is equipped with the Z-axis moving device, the Z-axis moving device is equipped with the Y-axis moving device, and the Y-axis moving device is equipped with the detection platform; the detection platform is equipped with a proximal runout detector and a distal runout detector, and the proximal runout detector and the distal runout detector are located on the same Y-axis;

[0045] The second testing mechanism includes a soft-base platform, a hard-base platform, and a lifting structure;

[0046] The hard base platform is fixed to the base, and the soft base platform includes a frame, a first base and a second base. The first base and the second base are fixed to the frame, and the frame is sleeved on the hard base platform. The first base and the second base are respectively located on both sides of the soft base platform.

[0047] The lifting structure is fixed to the base, and the lifting structure is provided with a guide rail on the side facing the soft base platform, so that the soft base platform can move up and down along the guide rail;

[0048] The tool changing mechanism is located on the base.

[0049] The present invention discloses an automated testing platform for an electric spindle. The platform detects the spindle runout value through a first testing device and the spindle vibration value through a second testing device. During the testing process, it can realize automatic tool changing and test bar changing, and can realize automatic conversion between runout value detection and vibration value detection. The testing speed is fast and the testing accuracy is high.

[0050] During spindle testing, runout is measured first. The spindle is placed on a hardened platform. The testing platform is equipped with a proximal runout detector and a distal runout detector. The X-axis position of the testing platform is the same as that of the spindle under test. A test bar is mounted on the spindle. The testing platform rises along the Z-axis. After reaching its position, it moves along the Y-axis to below the test bar. The spindle is then started, and the runout value of the test bar is measured using the proximal and distal runout detectors. If the value is not up to standard, the testing platform is reset, the spindle stops, and the spindle is reworked. If the value is up to standard, vibration is measured.

[0051] During vibration value detection, the soft base platform is raised by a lifting structure, causing the spindle to leave the hard base platform. The soft base platform supports the spindle, and the spindle is started. Two movable probes are manually installed on the spindle for detection. In this embodiment, magnetic vibration sensors are used. Two magnetic vibration sensors are installed on the surface of the spindle by magnetic attraction to detect vibration values. After the detection is completed, the spindle stops, and the lifting structure drives the soft base platform to descend. If the spindle fails, it is reworked. If the spindle passes, the detection is complete.

[0052] In this embodiment, the first detection mechanism further includes an X-axis moving device, which is disposed on the Z-axis moving device, and the Y-axis moving device is disposed on the X-axis moving device;

[0053] The detection platform includes a first detection plate perpendicular to the Z-axis and a second detection plate perpendicular to the Y-axis. The second detection plate is fixed to the end of the first detection plate. The second detection plate is provided with an internal hole runout detector and an end face runout detector. The first detection plate is provided with a proximal runout detector and a distal runout detector.

[0054] By moving the X, Y, and Z axes, the inspection platform can be prepared to align with the spindle, compensating for installation errors in the X-axis direction. The spindle's internal runout value and end face runout value can be detected by the internal runout detector and end face runout detector.

[0055] In operation, the inspection platform is moved to the spindle by adjusting the X, Y, and Z axes. First, the Z-axis is raised, then the X-axis position is adjusted, and finally the Y-axis position is adjusted to allow the internal bore runout detector to extend into the spindle's internal bore. The spindle is then started to detect the internal bore runout value. The end face runout detector detects the end face of the spindle in contact with the tool, detecting the end face runout value. After the internal bore runout and end face runout values ​​are detected, if the detection fails, the inspection platform is reset, and the spindle is reworked. If the detection passes, the inspection platform is moved back to its original position. Lower the inspection platform along the Z-axis to replace the inspection bar on the spindle. Then move the inspection platform and adjust the X-axis position so that the proximal runout detector and the distal runout detector are under the inspection bar. Adjust the Z-axis position to raise the inspection platform, start the spindle, and rotate the inspection bar. Detect the proximal and distal runout values ​​of the inspection bar using the proximal and distal runout detectors. If the test fails, reset the inspection platform and re-inspect the spindle. If the test passes, stop the spindle, reset the inspection platform, and the inspection is complete.

[0056] In this embodiment, the Z-axis moving device includes a hydraulic cylinder arranged along the Z-axis. The cylinder body of the hydraulic cylinder is fixed on the base, and the piston rod end of the hydraulic cylinder is fixedly connected to the X-axis moving device.

[0057] The X-axis moving device includes an X-axis guide rail, an X-axis slider, and an X-axis motor. The X-axis motor drives a lead screw to rotate. The X-axis slider is provided with a lead screw nut. The X-axis motor drives the X-axis slider to move along the X-axis guide rail through the lead screw and lead screw nut. The X-axis slider is provided with the Y-axis moving device.

[0058] The Y-axis moving device includes a Y-axis guide rail, a Y-axis slider, and a Y-axis motor. The Y-axis motor drives the Y-axis slider to move along the Y-axis guide rail, and the detection platform is provided on the Y-axis slider.

[0059] The hydraulic cylinder provides the force for movement in the Z-axis direction, while the X and Y axes are driven by motors and use lead screws for reliable and high-precision transmission.

[0060] In this embodiment, the first detection plate includes a first support portion and a second support portion. The second detection plate is fixed on the first support portion. One end of the second support portion is connected to the first support portion, and the other end extends along the Y-axis away from the main shaft to be tested. The proximal runout detector and the distal runout detector are disposed on the second support portion.

[0061] The internal hole runout detector and the end face runout detector are mounted on the second detection plate, with the internal hole runout detector and the end face runout detector set along the Y-axis direction, which is the same as the axis of the main spindle, to facilitate detection; at the same time, the second bearing part extends away from the main spindle to be inspected to avoid motion interference with the main spindle.

[0062] In this embodiment, the lifting structure includes a frame, a motor, a lead screw, and a lead screw nut. The frame is provided with the guide rail. The frame is connected to the guide rail via a slider. The frame has a connecting part, which is located between two guide rails and connected to the lead screw via the lead screw nut. The motor is located on the frame and drives the lead screw to rotate.

[0063] The connecting part extends into the frame, and the motor drives the lead screw to rotate, causing the frame and the connecting part to move along the guide rail. The rise and fall of the frame are controlled by the forward and reverse rotation of the motor.

[0064] The frame is equipped with a first sensor and a second sensor. The first sensor is used to detect the rising position of the frame, and the second sensor is used to detect the falling position of the frame.

[0065] The first sensor corresponds to the position of the upper edge of the frame when it is at its highest position, and the second sensor corresponds to the position of the lower edge of the frame when it is at its lowest position. Under normal operating conditions, the frame moves between the highest and lowest positions. When the frame reaches the highest or lowest position due to an operational error or malfunction, the sensor detects the frame position and sends a command to the controller to stop the motor and prevent an accident.

[0066] Both the first base and the second base are provided with EVA sponge, and the EVA sponge has a V-shaped bearing surface.

[0067] The spindle is placed on the V-shaped bearing surface of the EVA foam. The EVA foam prevents external vibrations from affecting the spindle vibration value test, which can make the measurement more accurate.

[0068] In this embodiment, the base has a first mounting surface and a second mounting surface, with the first mounting surface being higher than the second mounting surface. The rigid base platform is mounted on the first mounting surface, and the lifting structure is mounted on the second mounting surface. The lifting structure is mounted on the second mounting surface, allowing sufficient height for mounting the lead screw and preventing the lead nut from having too limited a range of motion on the lead screw, which would affect the lifting of the frame.

[0069] This embodiment also includes a testing fixture, which is mounted on the hard base platform and sleeved on the spindle to be tested. The testing fixture is provided with a positioning groove, and the hard base platform is provided with a positioning cylinder. The piston rod of the positioning cylinder can extend into the positioning groove in the horizontal direction.

[0070] When the spindle is inspecting other items on the hardened platform, such as runout values, the positioning cylinder can press the spindle firmly to prevent excessive current and runout during misoperation or initial startup. Extending the positioning cylinder allows adjustment of the spindle's angle on the hardened platform, ensuring the spindle is in a suitable inspection position.

[0071] In this embodiment, the tool changing mechanism includes tool magazines located on both sides of the second detection mechanism and a robotic arm mounted on the tool magazines. The two tool magazines are equipped with different tools and inspection bars, and the robotic arm performs the replacement, avoiding manual replacement and resulting in high efficiency and speed.

[0072] 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. An automated testing platform for an electric spindle, characterized in that, include: Base, first detection device, second detection device, and tool changing mechanism; The first detection device includes a mounting base, a Y-axis moving device, a Z-axis moving device, and a detection platform; The mounting base is fixed to the side of the base. The mounting base is provided with the Z-axis moving device, the Z-axis moving device is provided with the Y-axis moving device, and the Y-axis moving device is provided with the detection platform. The detection platform is provided with a proximal runout detector and a distal runout detector, and the proximal runout detector and the distal runout detector are located on the same Y-axis. The electric spindle can be placed on the second detection device along the Y-axis, and the end of the electric spindle used to hold the tool or inspection bar faces the first detection device; The second detection device includes a soft-base platform, a hard-base platform, and a lifting structure; The hard base platform is fixed to the base, and the soft base platform includes a frame, a first base and a second base. The first base and the second base are fixed to the frame, and the frame is sleeved on the hard base platform. The first base and the second base are respectively located on both sides of the hard base platform. The lifting structure is fixed to the base, and the lifting structure is provided with a guide rail on the side facing the soft base platform, so that the soft base platform can move up and down along the guide rail; The tool changing mechanism is mounted on the base; The first detection device further includes an X-axis moving device, which is mounted on the Z-axis moving device, and the Y-axis moving device is mounted on the X-axis moving device; The detection platform includes a first detection plate perpendicular to the Z-axis and a second detection plate perpendicular to the Y-axis. The second detection plate is fixed to the end of the first detection plate. The second detection plate is provided with an internal hole runout detector and an end face runout detector. The first detection plate is provided with a proximal runout detector and a distal runout detector. The Z-axis moving device includes a hydraulic cylinder arranged along the Z-axis. The cylinder body of the hydraulic cylinder is fixed on the base, and the end of the piston rod of the hydraulic cylinder is fixedly connected to the X-axis moving device. The X-axis moving device includes an X-axis guide rail, an X-axis slider, and an X-axis motor. The X-axis motor drives a lead screw to rotate. The X-axis slider is provided with a lead screw nut. The X-axis motor drives the X-axis slider to move along the X-axis guide rail through the lead screw and the lead screw nut. The X-axis slider is provided with the Y-axis moving device. The Y-axis moving device includes a Y-axis guide rail, a Y-axis slider, and a Y-axis motor. The Y-axis motor drives the Y-axis slider to move along the Y-axis guide rail, and the detection platform is provided on the Y-axis slider.

2. The automated testing platform for an electric spindle according to claim 1, characterized in that, The first detection plate includes a first support portion and a second support portion. The second detection plate is fixed on the first support portion. One end of the second support portion is connected to the first support portion, and the other end extends along the Y-axis away from the main shaft to be tested. The proximal runout detector and the distal runout detector are disposed on the second support portion.

3. The automated testing platform for an electric spindle according to claim 1, characterized in that, The lifting structure includes a frame, a motor, a lead screw, and a lead screw nut. The frame is provided with the guide rail. The frame is connected to the guide rail via a slider. The frame has a connecting part, which is located between two of the guide rails and is connected to the lead screw via the lead screw nut. The motor is located on the frame and drives the lead screw to rotate.

4. The automated testing platform for an electric spindle according to claim 3, characterized in that, The frame is equipped with a first sensor and a second sensor. The first sensor is used to detect the rising position of the frame, and the second sensor is used to detect the falling position of the frame.

5. The automated testing platform for an electric spindle according to claim 1, characterized in that, Both the first base and the second base are provided with EVA sponge, and the EVA sponge has a V-shaped bearing surface.

6. The automated testing platform for an electric spindle according to claim 1, characterized in that, The base has a first mounting surface and a second mounting surface, the first mounting surface is higher than the second mounting surface, the hard base platform is mounted on the first mounting surface, and the lifting structure is mounted on the second mounting surface.

7. The automated testing platform for an electric spindle according to claim 1, characterized in that, It also includes a testing fixture, which is mounted on the hard base platform and sleeved on the spindle to be tested. The testing fixture is provided with a positioning groove, and the hard base platform is provided with a positioning cylinder. The piston rod of the positioning cylinder can extend into the positioning groove in the horizontal direction.

8. The automated testing platform for an electric spindle according to claim 1, characterized in that, The tool changing mechanism includes tool magazines located on both sides of the second detection device and a robotic arm located on the tool magazines.

Images