A heavy-load, high-precision turntable for machine tools with strong anti-overturning properties

Abstract

The present invention relates to the technical field of machine tool turntables, and discloses a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties, comprising a base installed on the machine tool, a vertical conversion module for changing the Y-axis angle of the workpiece provided on the top of the base, and a horizontal conversion module for changing the Z-axis angle of the workpiece provided in the vertical conversion module. The present invention uses the vertical conversion module, the horizontal conversion module, the fixed module, the support wheel and the support frame in coordination, so that when the turntable carries heavy objects, it can support the connection of the turntable swing head, so that the support points of the turntable swing head are multiple points, thereby improving the service life of the swing head, and at the same time can drive the swing head with multiple powers, reduce the torque borne by the support points of the swing head, further improve the service life of the swing head, and can also pull the rotating shaft, so that the rotating shaft is not easy to tilt, thereby improving the processing accuracy of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool turntables, in particular to a heavy-load high-precision turntable for machine tools with strong anti-overturning properties. Background Art

[0002] The machine tool turntable is an important accessory of CNC machine tools, used to realize the rotation, indexing and positioning of workpieces, thereby improving processing efficiency and accuracy. It mainly includes general turntables and precision turntables, suitable for boring machines, drilling machines, milling machines, etc.

[0003] Among them, there are precision turntables suitable for heavy loads. Such turntables are usually large in size, difficult to carry, and have a heavy overall weight.

[0004] After searching, the Chinese patent with publication number CN117300657B discloses a CNC turntable for a metal product processing machine tool. The auxiliary rollers provide support for the workpiece, effectively preventing the workpiece from bouncing, and can automatically retract the auxiliary rollers, making it easy to use. However, the following problems still exist:

[0005] 1. When processing heavy workpieces, the weight of the workpiece will be fully applied to the connection between the supporting swing head and the base. When the workpiece position is changed, the center of gravity of the swing head and workpiece combination will change, causing wear on the connection between the swing head and the base, thereby reducing the accuracy of the turntable;

[0006] 2. After the swing head rotates, the fixation of the swing head angle mainly relies on the connecting parts on one side of the swing head. The connecting parts on one side of the swing head need to support the torque of the entire workpiece and the rotation of the swing head, which makes the connecting parts easily damaged, resulting in a short service life of the turntable;

[0007] 3. When the swing head rotates, it uses the cooperation of two bevel gears to make the swing head rotate. The swing head requires torque to drive the rotation. Large torque can easily cause the bevel gears to slip, resulting in the swing head being unable to rotate, thereby affecting the processing of the turntable. Summary of the Invention

[0008] Technical issues solved:

[0009] In response to the deficiencies in the prior art, the present invention provides a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties, which is mainly designed to solve the problem that when heavy workpieces are processed, the weight of the workpiece will act completely on the connection between the supporting swing head and the base. When the position of the workpiece is changed, the center of gravity of the combination of the swing head and the workpiece will change, thereby causing wear on the connection between the swing head and the base. After the swing head rotates, the connecting part on one side of the swing head needs to support the torque of the rotation of the entire workpiece and the swing head, which makes the connecting part easily damaged, resulting in a short service life of the turntable. When the swing head rotates, the large torque easily causes the bevel gears to slip, resulting in the swing head being unable to rotate, thereby affecting the turntable processing.

[0010] Technical solution:

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A heavy-load, high-precision turntable for machine tools with strong anti-overturning properties comprises a base mounted on the machine tool, a vertical conversion module for changing the Y-axis angle of a workpiece provided on the top of the base, a horizontal conversion module for changing the Z-axis angle of the workpiece provided inside the vertical conversion module, a support frame for supporting the horizontal conversion module provided on the outside of the horizontal conversion module, a support wheel for supporting the support frame provided on the top of the base, and a fixed module for fixing the angle of the support frame provided on the top of the base.

[0013] Furthermore, the vertical conversion module includes a first box body fixed on the top of the base, a second box body is rotatably connected between the inner walls on both sides of the first box body, a worm gear is fixed to one side of the second box body by bolts, a mounting plate is fixed to the outer wall of one side of the first box body by bolts, a servo motor is fixed to the bottom of the mounting plate by bolts, a worm is provided on the top of the mounting plate, which is driven by the servo motor to rotate along the axial direction of the servo motor and meshes with the worm gear, and a power component is provided on the top of the base to drive the support frame to rotate.

[0014] Based on the above scheme, the power assembly includes multiple fixed plates fixed on the top of the base, and the fixed plates on the two sides are rotatably connected by a connecting shaft through bearings. The middle part of the connecting shaft is keyed to two first gears, and the circumferential outer wall of the support frame is provided with two tooth grooves. The top outer wall of the first box body is provided with a avoidance groove, and the top of the first gear passes through the avoidance groove and engages with the tooth groove.

[0015] As a further solution of the present invention, the circumferential outer walls at both ends of the second box body are fixed with the first pulley by bolts, the two ends of the connecting shaft are keyed to the third gear, and the two fixed plates located at the same end are rotatably connected with the installation shaft through bearings, and the circumferential outer wall of the installation shaft is keyed to the second gear meshing with the third gear and the second pulley used in conjunction with the first pulley.

[0016] Furthermore, the horizontal conversion module includes a mounting bracket fixedly connected between the inner walls on both sides of the second box body, the top of the mounting bracket is fixed to the torque motor by bolts, the top of the second box body is provided with a avoidance hole, the top of the torque motor is fixed to the mounting platform by bolts through the avoidance hole, the bottom of the mounting platform is provided with a monitoring component for monitoring the operation of the mounting platform, the bottom end of the circular outer wall of the mounting platform is fixed with a fixing ring by bolts, the top of the support frame is fixed with a plurality of arc-shaped brackets cooperating with the fixing ring by bolts, the bottom of the mounting platform is provided with a mounting groove, a support bearing is clamped in the mounting groove, and the support bearing is fixed to the second box body.

[0017] Based on the above scheme, the monitoring component includes a plurality of distance sensors installed on the top of the second box body, and the plurality of distance sensors are evenly distributed on the circumferential outside of the avoidance hole. The bottom of the mounting platform is fixed with a detection frame used in conjunction with the distance sensor by bolts. The bottom diameter of the detection frame is larger than the diameter of the avoidance hole. The top inner wall of the second box body is fixedly connected with a plurality of displacement sensors in a cross-orthogonal layout, and the probes of the displacement sensors are in contact with the circumferential outer wall of the detection frame.

[0018] As a further solution of the present invention, the fixed module includes a support plate fixed to the top of the base, a hydraulic cylinder is fixed to one side of the support plate by bolts, the top of the base is slidably connected to two slides, a connecting rod is welded between the two slides, and the moving end of the hydraulic cylinder is fixed to one of the slides, the top of the two slides are fixed with a first friction plate by bolts, the circumferential outer wall of the support frame is provided with a placement groove, the second friction plate is bonded in the placement groove, and the top of the connecting rod is provided with a locking mechanism for auxiliary fixation of the connecting shaft.

[0019] Furthermore, the locking mechanism includes two extrusion frames fixed to the top of the connecting rod, and two groups of clamping groups are provided on the top of the base, each group of clamping groups includes two positioning plates fixed to the top of the base, two sliding holes are provided on one side of the positioning plate, and slides are slidably connected in the two sliding holes. A brake pad is fixed to the outer wall of one side of the slide by bolts, and a brake disc used in conjunction with the brake pad is fixed to the middle part of the outer wall of the circumference of the connecting shaft by bolts, and a tension spring fixed to the positioning plate is fixed to the inner wall of one side of the two slides by bolts.

[0020] Based on the above scheme, the transmission ratio between the tooth groove and the first gear is the same as the transmission ratio between the first pulley and the second pulley, the transmission ratio between the second gear and the third gear is 1, the first pulley and the second pulley are both synchronous pulleys, and synchronous belt transmission is adopted.

[0021] As a further solution of the present invention, a monitoring process for a turntable rotation and overturning accuracy monitoring component specifically includes the following steps:

[0022] Step 1: Initialize the hybrid sensing system, that is, start the distance sensor 308 and the displacement sensor 312 , and calibrate the reference planes of the distance sensor 308 and the displacement sensor 312 .

[0023] Step 2: Dual-mode cyclic monitoring, that is, when the mounting platform 304 is in operation, the distance sensor 308 is used to measure the distance between the detection frame 305 and the distance sensor 308, and the displacement sensor 312 is used to measure the offset of the detection frame 305, and the data transmitted by the distance sensor 308 and the displacement sensor 312 are processed.

[0024] Step 3: Data processing is divided into three levels of warning, namely primary warning, intermediate warning and emergency stop. The primary warning is triggered by the displacement sensor 312, and the threshold is the offset of 0.02mm. At this time, the processing feed rate is reduced by 50%, and a primary warning signal is issued; the intermediate warning is triggered by the distance sensor 308, and the threshold is the moving distance of 0.03mm. At this time, the processing parameters need to be adjusted, and an intermediate warning is issued; the emergency stop is determined by the displacement sensor 312 and the distance sensor 308, and the threshold is 0.05mm. At this time, the machine stops processing and issues a maintenance signal, waiting for equipment maintenance.

[0025] Step 4: After the equipment maintenance is completed, repeat step 1 and monitor the maintenance results according to step 3 to ensure the equipment is operating at the baseline.

[0026] Beneficial effects:

[0027] Compared with the prior art, the present invention provides a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties, which has the following beneficial effects:

[0028] 1. The present invention uses a vertical conversion module, a horizontal conversion module, a fixed module, a support wheel and a support frame in coordination, so that when the turntable carries heavy objects, it can support the connection of the turntable swing head, so that the support points of the turntable swing head are multiple, thereby improving the service life of the swing head. At the same time, the swing head can be driven by multiple forces to reduce the torque borne by the support points of the swing head, further improving the service life of the swing head, and can also pull the rotating shaft to prevent the rotating shaft from tilting, thereby improving the processing accuracy of the workpiece.

[0029] 2. The present invention is provided with a tooth groove and a first gear. The first gear cooperates with the tooth groove to drive the support frame to rotate, thereby driving the second box to rotate, providing an additional power for the rotation of the second box, thereby reducing the torque at the connection of the second box, protecting the second box, and increasing the service life of the second box.

[0030] 3. The present invention is provided with a first pulley and a second pulley, which can drive the first gear to rotate while the second box rotates, thereby realizing the transformation from one power driving the second box to three powers driving the second box to rotate, so that the two groups of parts are directly coupled to ensure complete synchronization of the actions, without relying on complex control algorithms, eliminating communication or response delay problems during multi-motor coordination, and improving the accuracy of the turntable.

[0031] 4. The present invention is provided with a fixing ring and an arc-shaped bracket. The arc-shaped bracket will pull the fixing ring, thereby increasing the fixing points of the mounting platform, and then the arc-shaped bracket can pull the fixing ring, thereby sharing the supporting force of the torque motor on the mounting platform, thereby improving the service life of the torque motor.

[0032] 5. The present invention monitors the operation of the mounting table in real time by providing a hybrid sensing system composed of monitoring components, thereby ensuring the processing accuracy of the workpiece and improving the processing yield rate of the turntable.

[0033] 6. The present invention is provided with a fixed module, the first friction plate contacts the second friction plate, and the angle between the support frame and the second box body is fixed, thereby changing the force applied to the second box body, making it impossible for the second box body to rotate, reducing the torque applied to the second box body, and further improving the service life of the second box body.

[0034] 7. The present invention provides a locking mechanism, and the brake pad contacts the brake disc, thereby auxiliary fixing the connecting shaft, thereby locking the power of the second box, further preventing the position of the second box from changing, and improving the rotation accuracy of the second box. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the rear three-dimensional structure of a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties proposed by the present invention;

[0036] Figure 2 This is a schematic diagram of the front side three-dimensional structure of a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties proposed by the present invention;

[0037] Figure 3 The invention proposes a heavy-load high-precision turntable for machine tools with strong anti-overturning properties. Figure 2 A schematic diagram of a partial cross-sectional structure;

[0038] Figure 4 This is a schematic cross-sectional view of a vertical conversion module of a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties proposed by the present invention;

[0039] Figure 5 The invention proposes a heavy-load high-precision turntable for machine tools with strong anti-overturning properties. Figure 4 A schematic diagram of the enlarged structure of part A;

[0040] Figure 6 This is an enlarged structural diagram of a horizontal conversion module of a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties proposed by the present invention;

[0041] Figure 7 The invention proposes a heavy-load high-precision turntable for machine tools with strong anti-overturning properties. Figure 6 Schematic diagram of the decomposition structure;

[0042] Figure 8 The invention proposes a heavy-load high-precision turntable for machine tools with strong anti-overturning properties. Figure 6 A schematic diagram of a partial cross-sectional structure;

[0043] Figure 9This is an enlarged structural diagram of a fixed module of a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties proposed by the present invention;

[0044] Figure 10 The invention proposes a heavy-load high-precision turntable for machine tools with strong anti-overturning properties. Figure 9 A schematic diagram of a partial cross-sectional structure;

[0045] Figure 11 The present invention provides a flow chart of a monitoring system for a heavy-load, high-precision turntable for machine tools with strong anti-overturning properties.

[0046] In the figure: 1. Base; 2. Vertical conversion module; 201. First housing; 202. First pulley; 203. Connecting shaft; 204. Tooth groove; 205. Servo motor; 206. Mounting plate; 207. Worm; 208. Worm wheel; 209. Avoidance groove; 210. First gear; 211. Second pulley; 212. Second gear; 213. Mounting shaft; 214. Third gear; 215. Fixing plate; 3. Horizontal conversion module; 301. Second housing; 302. Arc bracket; 303. Fixing ring; 304. Mounting platform ; 305. Detection frame; 306. Support bearing; 307. Avoidance hole; 308. Distance sensor; 309. Torque motor; 310. Mounting frame; 311. Mounting slot; 312. Displacement sensor; 4. Fixed module; 401. Support plate; 402. Hydraulic cylinder; 403. Slide; 404. First friction plate; 405. Connecting rod; 406. Extrusion frame; 407. Slide; 408. Positioning plate; 409. Tension spring; 410. Brake pad; 411. Brake disc; 412. Second friction plate; 5. Support wheel; 6. Support frame. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0049] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] Reference Figures 1-11 A heavy-duty, high-precision turntable for machine tools with strong anti-overturning properties comprises a base 1 mounted on the machine tool, a vertical conversion module 2 for changing the Y-axis angle of the workpiece is provided on the top of the base 1, a horizontal conversion module 3 for changing the Z-axis angle of the workpiece is provided inside the vertical conversion module 2, a support frame 6 for supporting the horizontal conversion module 3 is provided on the outside of the horizontal conversion module 3, a support wheel 5 for supporting the support frame 6 is provided on the top of the base 1, and a fixing module 4 for fixing the angle of the support frame 6 is provided on the top of the base 1. When in use, the device is mounted on the machine tool, and a heavy workpiece is placed on the horizontal conversion module 3, and a special fixture is used to fix the workpiece. The vertical conversion module 2 can adjust the processing angles of the X-axis and Y-axis of the workpiece. When the vertical conversion module 2 is adjusting the angle, the support wheel 5 will support the support frame 6, thereby supporting the vertical conversion module 2 and the horizontal conversion module 3, thereby avoiding the connection supporting the entire workpiece and the overall weight of the vertical conversion module 2 and the horizontal conversion module 3, reducing the force on the rotating connection of the vertical conversion module 2, and improving the service life of the vertical conversion module 2. At the same time, the rotation accuracy of the vertical conversion module 2 is improved, and the anti-overturning ability of the turntable is improved. The Z-axis angle conversion of the workpiece is realized through the horizontal conversion module 3, so that the workpiece can be processed in all directions.

[0051] In order to drive the workpiece to rotate along the X-axis or Y-axis, the vertical conversion module 2 of the present invention includes a first box body 201 fixed to the top of the base 1, and the rotation between the inner walls on both sides of the first box body 201 is connected to the second box body 301, and a worm gear 208 is fixed to one side of the second box body 301 by bolts. A mounting plate 206 is fixed to the outer wall of one side of the first box body 201 by bolts, and a servo motor 205 is fixed to the bottom of the mounting plate 206 by bolts. A worm 207 is provided on the top of the mounting plate 206, which is driven by the servo motor 205 to rotate along the axial direction of the servo motor 205 and meshes with the worm gear 208. The engagement between 8 and the worm 207 has a one-way transmission property and has the effect of high-precision power transmission. A power component is provided on the top of the base 1 to drive the support frame 6 to assist in rotation. The servo motor 205 is started, and the servo motor 205 drives the worm 207 to rotate, thereby driving the worm wheel 208 to rotate, and then driving the second box body 301 to rotate. The power component drives the support frame 6 to assist in rotation along the rotation axis of the second box body 301, thereby reducing the torque of the worm wheel 208 to drive the second box body 301 to rotate, thereby improving the protection of the connection between the two ends of the second box body 301, and further improving the service life of the turntable.

[0052] In order to drive the support frame 6 to perform auxiliary rotation, the power assembly of the present invention includes a plurality of fixed plates 215 fixed to the top of the base 1 by bolts, and a connecting shaft 203 is rotatably connected between the fixed plates 215 on both sides through bearings. The middle part of the connecting shaft 203 is keyed to two first gears 210, and the outer wall of the circumference of the support frame 6 is provided with two tooth grooves 204. The outer wall of the top of the first box body 201 is provided with a avoidance groove 209, and the top of the first gear 210 passes through the avoidance groove 209 and meshes with the tooth groove 204. The connecting shaft 203 is rotated, and the connecting shaft 203 drives the first gear 210 to rotate. When the first gear 210 is engaged with the tooth groove 204, the support frame 6 rotates along the rotation axis of the second box body 301, thereby sharing the torque required for the rotation of the second box body 301, and making the second box body 301 rotate more easily. The two parts are driven by one motor, so that the second box body 301 is rotated by the worm gear 208 and the second box body 301 is rotated by the first gear 210, so that the two groups of parts are directly coupled to ensure complete synchronization of the actions without relying on complex control algorithms, eliminating communication or response delay problems during multi-motor coordination, and improving the accuracy of the turntable.

[0053] In order to drive the connecting shaft 203 to rotate, the circumferential outer walls of the second box body 301 at both ends of the present invention are fixed with the first pulley 202 by bolts, and the two ends of the connecting shaft 203 are keyed to the third gear 214. The two fixing plates 215 at the same end are rotatably connected with the installation shaft 213 through a bearing. The circumferential outer wall of the installation shaft 213 is keyed to the second gear 212 meshing with the third gear 214 and the second pulley 211 used in conjunction with the first pulley 202. The first pulley 202 and the second pulley 211 are both synchronous pulleys and adopt synchronous belt transmission. When the second box body 301 rotates, the second box body 301 will drive the first pulley 20 2 rotates, and the second pulley 211 is driven to rotate by the synchronous belt, so that the second pulley 211 and the second gear 212 rotate synchronously, and then the third gear 214 is driven to rotate, thereby driving the connecting shaft 203 to rotate synchronously, wherein the transmission ratio between the tooth groove 204 and the first gear 210 is the same as the transmission ratio between the first pulley 202 and the second pulley 211, and the transmission ratio between the second gear 212 and the third gear 214 is 1, thereby achieving smooth rotation of the second box 301. Only one power is needed to achieve smooth rotation of the second box 301. The structure is simple, and zero-delay transmission of power can be achieved, while reducing the subsequent maintenance cost of the equipment.

[0054] In order to drive the workpiece to rotate along the Z axis, the horizontal conversion module 3 in the present invention includes a mounting frame 310 fixedly connected between the inner walls on both sides of the second box body 301. The top of the mounting frame 310 is fixed with a torque motor 309 by bolts. The model of the torque motor 309 is HTMS03. A avoidance hole 307 is provided on the top of the second box body 301. The top of the torque motor 309 is fixed with a mounting platform 304 by bolts through the avoidance hole 307. A mounting groove 311 is provided at the bottom of the mounting platform 304. A support bearing 306 is clamped in the mounting groove 311, and the support bearing 306 is fixed to the second box body 301. The support bearing 306 can reduce the friction between the mounting platform 304 and the second box body 301. The workpiece is placed on the mounting platform 304 and a rotating fixture is used to rotate the workpiece. The rotation of the workpiece 304 is carried out by the second box body 301, and the arc-shaped bracket 302 is fixed to the top of the bracket 6. When the workpiece on the mounting platform 304 is rotated and tilted by the second box body 301, the arc-shaped bracket 302 will pull the fixing ring 303, thereby increasing the fixing points of the mounting platform 304, and then the arc-shaped bracket 302 can pull the fixing ring 303, thereby sharing the supporting force of the torque motor 309 on the mounting platform 304, thereby improving the service life of the torque motor 309.

[0055] In order to monitor the operation of the mounting platform 304, the monitoring component of the present invention includes a plurality of distance sensors 308 installed on the top of the second box 301, and the plurality of distance sensors 308 are evenly distributed outside the circumference of the avoidance hole 307. The model of the distance sensor 308 is CJVL53L0XV2. The bottom of the mounting platform 304 is fixed with a detection frame 305 used in conjunction with the distance sensor 308 by bolts. The detection plane circular runout of the detection frame 305 is not greater than 0.05mm, and the bottom diameter of the detection frame 305 is larger than the avoidance hole. 307, a plurality of displacement sensors 312 arranged in a cross-orthogonal pattern are fixedly connected to the top inner wall of the second box body 301, and the probes of the displacement sensors 312 are in contact with the circumferential outer wall of the detection frame 305. The roundness tolerance of the contact surface between the detection frame 305 and the probe is not greater than 0.02 mm. The displacement sensor 312 is a POM-HDH8 pencil-shaped LVDT displacement sensor. Therefore, the operation of the mounting table 304 is monitored in real time through the formed hybrid sensing system, thereby ensuring the processing accuracy of the workpiece and improving the processing yield of the turntable.

[0056] In order to assist in fixing the adjusted support frame 6, the fixed module 4 in the present invention includes a support plate 401 fixed to the top of the base 1, and a hydraulic cylinder 402 is fixed to one side of the support plate 401 by bolts. The top of the base 1 is slidably connected to two slides 403, and a connecting rod 405 is welded between the two slides 403. The moving end of the hydraulic cylinder 402 is fixed to one of the slides 403. The tops of the two slides 403 are both fixed with a first friction plate 404 by bolts. A placement groove is opened on the outer wall of the circumference of the support frame 6, and a second friction plate 41 is bonded in the placement groove. 2. A locking mechanism is provided at the top of the connecting rod 405 to assist in fixing the connecting shaft 203. When there is no need to adjust the position of the second box body 301, the hydraulic cylinder 402 is started, and the hydraulic cylinder 402 drives the two slides 403 to move, thereby making the first friction plate 404 contact the second friction plate 412, thereby fixing the angle between the support frame 6 and the second box body 301, thereby changing the force applied to the second box body 301, making it impossible for the second box body 301 to rotate, reducing the torsional force applied to the second box body 301, and further improving the service life of the second box body 301.

[0057] In order to assist in fixing the support frame 6, the locking mechanism of the present invention includes two extrusion frames 406 fixed to the top of the connecting rod 405, and two groups of clamping groups are provided on the top of the base 1. Each clamping group includes two positioning plates 408 fixed to the top of the base 1. Two sliding holes are provided on one side of the positioning plate 408. The two sliding holes are slidably connected with a slide 407. A brake pad 410 is fixed to the outer wall of one side of the slide 407 by bolts. A brake disc 411 used in conjunction with the brake pad 410 is fixed to the middle part of the outer wall of the circumference of the connecting shaft 203 by bolts. A tension spring 409 fixed to the positioning plate 408 is fixed to the inner wall of one side of the two slides 407 by bolts. When the slide 403 moves, the slide 403 will drive the connecting rod 405 to move, thereby driving the extrusion frame 406 to move. The extrusion frame 406 will squeeze the inclined surface on one side of the slide 407, so that the slide 407 moves in the sliding hole, and then the brake pad 410 contacts the brake disc 411, thereby auxiliary fixing the connecting shaft 203, and then locking the power of the second box body 301, so as to further prevent the position of the second box body 301 from changing, thereby improving the fixing effect of the second box body 301, and reducing the loss of the second box body 301. At the same time, it can reduce the pressure between the worm gear 208 and the worm 207, so that the pressure on the second box body 301 is dispersed to the first gear 210, the first friction plate 404, the second friction plate 412 and the connection between the worm gear 208 and the worm 207, thereby protecting the worm gear 208 and the worm 207, avoiding abnormal wear caused by excessive force, and improving the rotation accuracy of the turntable.

[0058] The monitoring process for the turntable rotation and overturning accuracy monitoring component specifically includes the following steps:

[0059] Step 1: Initialize the hybrid sensing system, that is, start the distance sensor 308 and the displacement sensor 312 , and calibrate the reference planes of the distance sensor 308 and the displacement sensor 312 .

[0060] Step 2: Dual-mode cyclic monitoring, that is, when the mounting platform 304 is in operation, the distance sensor 308 is used to measure the distance between the detection frame 305 and the distance sensor 308, and the displacement sensor 312 is used to measure the offset of the detection frame 305, and the data transmitted by the distance sensor 308 and the displacement sensor 312 are processed.

[0061] Step 3: Data processing is divided into three levels of warning, namely primary warning, intermediate warning and emergency stop. The primary warning is triggered by the displacement sensor 312, and the threshold is the offset of 0.02mm. At this time, the processing feed rate is reduced by 50%, and a primary warning signal is issued; the intermediate warning is triggered by the distance sensor 308, and the threshold is the moving distance of 0.03mm. At this time, the processing parameters need to be adjusted, and an intermediate warning is issued; the emergency stop is determined by the displacement sensor 312 and the distance sensor 308, and the threshold is 0.05mm. At this time, the machine stops processing and issues a maintenance signal, waiting for equipment maintenance.

[0062] Step 4: After the equipment maintenance is completed, repeat step 1 and monitor the maintenance results according to step 3 to ensure the equipment is operating at the baseline.

[0063] The present invention is divided into the following steps when used:

[0064] S1: Place the workpiece on the mounting table 304 and fix the workpiece using a rotating fixture;

[0065] S2: When the workpiece needs to be rotated along the X or Y axis, the servo motor 205 is started, and the servo motor 205 drives the worm 207 to rotate, thereby driving the worm gear 208 to rotate, and then driving the second box 301 to rotate, thereby driving the mounting platform 304 to rotate together with the workpiece;

[0066] S3: When the second box body 301 rotates, the second box body 301 drives the first pulley 202 to rotate, and drives the second pulley 211 to rotate through the synchronous belt, so that the second pulley 211 and the second gear 212 rotate synchronously, and then drives the third gear 214 to rotate, thereby driving the connecting shaft 203 to rotate synchronously;

[0067] S4: The rotation of the connecting shaft 203 drives the first gear 210 to rotate. When the first gear 210 is engaged with the tooth groove 204, the support frame 6 rotates along the rotation axis of the second box body 301, thereby sharing the torque required for the rotation of the second box body 301;

[0068] S5: At the same time, the support wheel 5 supports the support frame 6, thereby supporting the rotating second box 301, thereby reducing the gravity at the connection between the second box 301 and the first box 201, so that both sides of the second box 301 are not easily worn;

[0069] S6: When the workpiece needs to be rotated about the Z axis, the torque motor 309 is started. The torque motor 309 can drive the mounting table 304 to rotate, thereby driving the workpiece to rotate about the Z axis.

[0070] S7: When the second box 301 rotates, the workpiece on the mounting platform 304 is driven by the second box 301 to rotate and tilt, and the arc-shaped clamping frame 302 pulls the fixing ring 303, thereby increasing the fixing points of the mounting platform 304. In turn, the arc-shaped clamping frame 302 can pull the fixing ring 303, thereby sharing the supporting force of the torque motor 309 on the mounting platform 304, thereby improving the service life of the torque motor 309;

[0071] S8: When the angle of the second box body 301 needs to be fixed, the hydraulic cylinder 402 is activated, and the hydraulic cylinder 402 drives the two slides 403 to move, thereby making the first friction plate 404 contact the second friction plate 412, thereby fixing the angle between the support frame 6 and the second box body 301, thereby changing the force applied to the second box body 301, making it unable to rotate, and reducing the torque applied to the second box body 301;

[0072] S9: At the same time, the slide 403 will drive the connecting rod 405 to move, thereby driving the extrusion frame 406 to move. The extrusion frame 406 will squeeze the inclined surface on one side of the slide 407, so that the slide 407 moves in the slide hole, and then the brake pad 410 contacts the brake disc 411, thereby assisting in fixing the connecting shaft 203, and then locking the power of the second box body 301, further preventing the position of the second box body 301 from changing.

[0073] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A heavy-load, high-precision turntable for machine tools with strong anti-overturning properties, comprising a base (1) mounted on the machine tool, characterized in that: The top of the base (1) is provided with a vertical conversion module (2) for changing the Y-axis angle of the workpiece, the vertical conversion module (2) is provided with a horizontal conversion module (3) for changing the Z-axis angle of the workpiece, the outside of the horizontal conversion module (3) is provided with a support frame (6) for supporting the horizontal conversion module (3), the top of the base (1) is provided with a support wheel (5) for supporting the support frame (6), and the top of the base (1) is provided with a fixing module (4) for fixing the angle of the support frame (6); The vertical conversion module (2) comprises a first box body (201) fixed on the top of the base (1), a second box body (301) is rotatably connected between the inner walls on both sides of the first box body (201), a worm gear (208) is fixedly connected to one side of the second box body (301), a mounting plate (206) is fixedly connected to the outer wall on one side of the first box body (201), a servo motor (205) is fixedly connected to the bottom of the mounting plate (206), a worm (207) is provided on the top of the mounting plate (206), which is driven by the servo motor (205) to rotate along the axial direction of the servo motor (205) and meshes with the worm gear (208), and a power assembly is provided on the top of the base (1) to drive the support frame (6) to rotate; The power assembly includes a plurality of fixed plates (215) fixed on the top of the base (1), a connecting shaft (203) is rotatably connected between the fixed plates (215) on both sides via bearings, a middle portion of the connecting shaft (203) is keyed to two first gears (210), the circumferential outer wall of the support frame (6) is provided with two tooth grooves (204), the top outer wall of the first box body (201) is provided with a avoidance groove (209), and the top of the first gear (210) passes through the avoidance groove (209) and meshes with the tooth groove (204); The horizontal conversion module (3) includes a mounting frame (310) fixedly connected between the inner walls of both sides of the second box (301), the top of the mounting frame (310) is fixedly connected to a torque motor (309), the top of the second box (301) is provided with a position avoidance hole (307), the top of the torque motor (309) is fixedly connected to a mounting platform (304) through the position avoidance hole (307), the bottom of the mounting platform (304) is provided with a monitoring component for monitoring the operation of the mounting platform (304), the bottom end of the circumferential outer wall of the mounting platform (304) is fixedly connected to a fixing ring (303), the top of the support frame (6) is fixedly connected to a plurality of arc-shaped brackets (302) matched with the fixing ring (303), the bottom of the mounting platform (304) is provided with a mounting groove (311), a support bearing (306) is clamped in the mounting groove (311), and the support bearing (306) is fixed to the second box (301); The fixed module (4) includes a support plate (401) fixed on the top of the base (1), a hydraulic cylinder (402) is fixedly connected to one side of the support plate (401), two slides (403) are slidably connected to the top of the base (1), a connecting rod (405) is fixedly connected between the two slides (403), and the moving end of the hydraulic cylinder (402) is fixed to one of the slides (403), and the tops of the two slides (403) are fixedly connected to a first friction plate (404), the outer circumferential wall of the support frame (6) is provided with a placement groove, and a second friction plate (412) is bonded in the placement groove, and a locking mechanism for auxiliary fixation of the connecting shaft (203) is provided on the top of the connecting rod (405); The locking mechanism comprises two extrusion frames (406) fixed on the top of the connecting rod (405), two clamping groups are provided on the top of the base (1), each clamping group comprises two positioning plates (408) fixed on the top of the base (1), two sliding holes are provided on one side of the positioning plate (408), and a slide (407) is slidably connected in each of the two sliding holes, a brake pad (410) is fixedly connected to the outer wall of one side of the slide (407), a brake disc (411) used in conjunction with the brake pad (410) is fixedly connected to the middle part of the outer wall of the circumference of the connecting shaft (203), and a tension spring (409) fixed to the inner wall of one side of the two slides (407) is fixedly connected.

2. The heavy-load, high-precision turntable for machine tools with strong anti-overturning properties according to claim 1, characterized in that: The circumferential outer walls at both ends of the second box body (301) are fixedly connected to the first pulley (202), and the two ends of the connecting shaft (203) are key-connected to the third gear (214). The two fixed plates (215) located at the same end are rotatably connected to the installation shaft (213) through a bearing, and the circumferential outer wall of the installation shaft (213) is key-connected to the second gear (212) meshing with the third gear (214) and the second pulley (211) used in conjunction with the first pulley (202).

3. The heavy-load, high-precision turntable for machine tools with strong anti-overturning properties according to claim 1, characterized in that: The monitoring assembly comprises a plurality of distance sensors (308) mounted on the top of the second box (301), and the plurality of distance sensors (308) are evenly distributed outside the circumference of the avoidance hole (307); a detection frame (305) for use with the distance sensors (308) is fixedly connected to the bottom of the mounting platform (304); the bottom diameter of the detection frame (305) is larger than the diameter of the avoidance hole (307); a plurality of displacement sensors (312) arranged in a cross-orthogonal manner are fixedly connected to the inner wall of the top of the second box (301), and probes of the displacement sensors (312) are in contact with the outer circumference of the detection frame (305).

4. The heavy-load, high-precision turntable for machine tools with strong anti-overturning properties according to claim 2, characterized in that: The transmission ratio between the tooth groove (204) and the first gear (210) is the same as the transmission ratio between the first pulley (202) and the second pulley (211); the transmission ratio between the second gear (212) and the third gear (214) is 1; the first pulley (202) and the second pulley (211) are both synchronous pulleys and are driven by synchronous belts.

5. The heavy-load, high-precision turntable for machine tools with strong anti-overturning properties according to claim 3, characterized in that: The monitoring process for the turntable rotation and overturning accuracy monitoring component specifically includes the following steps: Step 1: Initializing the hybrid sensing system, i.e., starting the distance sensor (308) and the displacement sensor (312), and calibrating the reference planes of the distance sensor (308) and the displacement sensor (312); Step 2: Dual-mode cyclic monitoring, that is, when the mounting platform (304) is in operation, the distance between the detection frame (305) and the distance sensor (308) is measured using the distance sensor (308), the offset of the detection frame (305) is measured using the displacement sensor (312), and the data transmitted by the distance sensor (308) and the displacement sensor (312) are processed; Step 3: Data processing is divided into three levels of warning, namely primary warning, intermediate warning and emergency stop. The primary warning is triggered by the displacement sensor (312), the threshold is the offset of 0.02mm, the processing feed is reduced by 50% at this time, and a primary warning signal is issued; the intermediate warning is triggered by the distance sensor (308), the threshold is the moving distance of 0.03mm, at this time, the processing parameters need to be adjusted, and an intermediate warning is issued; the emergency stop is determined by the displacement sensor (312) and the distance sensor (308), the threshold is 0.05mm, at this time the machine stops processing and issues a maintenance signal, waiting for equipment maintenance; Step 4: After the equipment maintenance is completed, repeat step 1 and monitor the maintenance results according to step 3 to ensure the equipment is operating at the baseline.

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