Heavy-load high-precision turntable for machine tool with strong overturning resistance

Abstract

The invention relates to the technical field of machine tool rotary tables, and discloses a heavy-load high-precision rotary table with high overturning resistance for a machine tool, which comprises a base mounted on the machine tool, a vertical conversion module used for changing the Y-axis angle of a workpiece is arranged at the top of the base, and a horizontal conversion module used for changing the Z-axis angle of the workpiece is arranged in the vertical conversion module. Through cooperative use of the vertical conversion module, the horizontal conversion module, the fixing module, the supporting wheel and the supporting frame, when the rotary table bears a heavy object, the connecting position of the rotary table swing head can be supported, the number of supporting points of the rotary table swing head is multiple, and therefore the service life of the swing head is prolonged, meanwhile, multi-power driving can be conducted on the swing head, and the practicability is high. Torsion bearing of a swing head supporting point is relieved, the service life of the swing head is further prolonged, the rotating shaft can be pulled, the rotating shaft is not prone to inclination, and then the machining precision of a workpiece is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tool turntables, and particularly to a heavy-duty high-precision turntable for machine tools with strong anti-overturning ability. Background Art

[0002] A machine tool turntable is an important accessory of a numerically controlled machine tool, which is used to realize the rotation, indexing and positioning of workpieces, so as to improve the processing efficiency and accuracy. It mainly includes general turntables and precision turntables, and is applicable to boring machines, drilling machines, milling machines, etc.

[0003] Among them, there is a precision turntable suitable for heavy loads. Such turntables usually have the characteristics of large size, difficult to handle, and heavy overall weight.

[0004] After retrieval, the Chinese patent with the publication number CN117300657B discloses a numerical control turntable for metal product processing machine tools. The auxiliary roller provides support for the workpiece, which can effectively prevent the workpiece from jumping, and can automatically store the auxiliary roller, making it convenient to use. However, there are still the following problems:

[0005] 1. When processing heavy workpieces, the weight of the workpiece will act entirely on the connection between the supporting swing head and the base. When the position of the workpiece is converted, the center of gravity of the combination of the swing head and the workpiece will change, which will cause wear to the connection between the swing head and the base, and further reduce the accuracy of the turntable.

[0006] 2. After the swing head rotates, the fixing of the swing head angle mainly relies on the connecting piece on one side of the swing head. And the connecting piece on one side of the swing head needs to support the torsion of the rotation of the entire workpiece and the swing head, which makes the connecting piece easy to be damaged, resulting in a low 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. And the swing head needs torque to drive the rotation. Large torque is easy to cause the bevel gears to slip, resulting in the swing head being unable to rotate, thus affecting the processing of the turntable. Summary of the Invention

[0008] Technical Problems to be Solved

[0009] Aiming at the deficiencies of the prior art, the present invention provides a heavy-duty high-precision turntable for machine tools with strong anti-overturning ability, mainly to solve the problems that when processing heavy workpieces, the weight of the workpiece will act entirely on the connection between the supporting swing head and the base, and when the position of the workpiece is converted, the center of gravity of the combination of the swing head and the workpiece will change, which will cause wear to the connection between the swing head and the base, and after the swing head rotates, the connecting piece on one side of the swing head needs to support the torsion of the rotation of the entire workpiece and the swing head, which makes the connecting piece easy to be damaged, resulting in a low service life of the turntable, and when the swing head rotates, large torque is easy to cause the bevel gears to slip, resulting in the swing head being unable to rotate, thus affecting the processing of the turntable.

[0010] Technical solution:

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

[0012] A heavy-duty high-precision turntable for machine tools with strong anti-overturning ability, including a base installed on the machine tool. A vertical conversion module for changing the Y-axis angle of the workpiece is provided on the top of the base. A horizontal conversion module for changing the Z-axis angle of the workpiece is arranged inside the vertical conversion module. A support frame for supporting the horizontal conversion module is arranged outside the horizontal conversion module. A support wheel for supporting the support frame is provided on the top of the base. A fixing module for fixing the angle of the support frame is provided on the top of the base.

[0013] Further, 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 on one side of the second box body by bolts. A mounting plate is fixed on the outer wall of one side of the first box body by bolts. A servo motor is fixed on the bottom of the mounting plate by bolts. A worm is arranged on the top of the mounting plate and is driven by the servo motor to rotate along the axial direction of the servo motor and meshes with the worm gear. A power component for driving the support frame to rotate is provided on the top of the base.

[0014] On the basis of the foregoing solution, the power component includes a plurality of fixing plates fixed on the top of the base. A connecting shaft is rotatably connected between the outermost fixing plates on both sides through bearings. Two first gears are key-connected to the middle part of the connecting shaft. Two tooth grooves are formed on the circumferential outer wall of the support frame. An avoidance groove is formed on the top outer wall of the first box body. The top of the first gear passes through the avoidance groove and meshes with the tooth groove.

[0015] As a further scheme of the present invention, first belt wheels are fixed on the circumferential outer walls at both ends of the second box body by bolts. Third gears are key-connected to both ends of the connecting shaft. A mounting shaft is rotatably connected between the two fixing plates at the same end through bearings. A second gear meshing with the third gear and a second belt wheel cooperating with the first belt wheel are key-connected to the circumferential outer wall of the mounting shaft.

[0016] Further, the horizontal conversion module includes a mounting frame fixedly connected between the inner walls on both sides of the second box body. A torque motor is fixed on the top of the mounting frame by bolts. An avoidance hole is formed on the top of the second box body. The top of the torque motor passes through the avoidance hole and is fixed to a mounting table by bolts. A monitoring component for monitoring the operation of the mounting table is arranged at the bottom of the mounting table. A fixing ring is fixed on the bottom circumferential outer wall of the mounting table by bolts. A plurality of arc-shaped clamping frames cooperating with the fixing ring are fixed on the top of the support frame by bolts. A mounting groove is formed at the bottom of the mounting table. A support bearing is clamped in the mounting groove and is fixed to the second box body.

[0017] On the basis of the foregoing solution, 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 outer circumference of the avoidance hole. The bottom of the mounting table is fixed with a detection frame that cooperates with the distance sensor through bolts. The bottom diameter of the detection frame is larger than the diameter of the avoidance hole. The inner wall of the top of the second box body is fixedly connected with a plurality of displacement sensors arranged in a cross-orthogonal layout, and the probes of the displacement sensors are in contact with the outer circumferential wall of the detection frame.

[0018] As a further solution of the present invention, the fixing module includes a support plate fixed on the top of the base. One side of the support plate is fixed with a hydraulic cylinder through bolts. Two sliding seats are slidably connected to the top of the base. A connecting rod is welded between the two sliding seats, and the moving end of the hydraulic cylinder is fixed to one of the sliding seats. First friction plates are fixed on the tops of the two sliding seats through bolts. A placement groove is formed on the outer circumferential wall of the support frame, and a second friction plate is adhered in the placement groove. A locking mechanism for assisting in fixing the connecting shaft is provided at the top of the connecting rod.

[0019] Further, the locking mechanism includes two extrusion frames fixed on the top of the connecting rod. Two sets of clamping groups are provided on the top of the base. Each set of clamping groups includes two positioning plates fixed on the top of the base. Two sliding holes are formed on one side of the positioning plate. Slide frames are slidably connected in the two sliding holes. A brake piece is fixed on the outer wall of one side of the slide frame through bolts. A brake disc that cooperates with the brake piece is fixed on the middle part of the outer circumferential wall of the connecting shaft through bolts. A tension spring fixed to the positioning plate is fixed on the inner wall of one side of the two slide frames through bolts.

[0020] On the basis of the foregoing solution, the transmission ratio between the tooth groove and the first gear is the same as the transmission ratio between the first belt pulley and the second belt pulley. The transmission ratio between the second gear and the third gear is 1. The first belt pulley and the second belt pulley are both synchronous belt pulleys, and synchronous belt transmission is adopted.

[0021] As a further solution of the present invention, the monitoring process of the monitoring component for the rotation and overturning accuracy of the turntable 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, during the operation of the mounting table 304, use the distance sensor 308 to measure the distance between the detection frame 305 and the distance sensor 308, use the displacement sensor 312 to measure the offset of the detection frame 305, and process the data transmitted by the distance sensor 308 and the displacement sensor 312.

[0024] Step 3: The data processing is divided into three levels of early warnings, namely primary early warning, intermediate early warning, and emergency shutdown. The primary early warning is triggered by the displacement sensor 312, with a threshold of an offset of 0.02 mm. At this time, the machining feed rate is reduced by 50%, and a primary early warning signal is sent out; the intermediate early warning is triggered by the distance sensor 308, with a threshold of a moving distance of 0.03 mm. At this time, the machining parameters need to be adjusted, and an intermediate early warning is sent out; the emergency shutdown is determined by a combination of the displacement sensor 312 and the distance sensor 308, with both thresholds being 0.05 mm. At this time, the machine stops machining, and a maintenance required signal is sent out, 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 benchmark operation of the equipment.

[0026] Beneficial effects:

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

[0028] 1. By the combined use of the vertical conversion module, horizontal conversion module, fixed module, support wheel and support frame in the present invention, when the turntable bears heavy objects, it can support the connection part of the turntable swing head, making the support points of the turntable swing head multiple, thereby increasing the service life of the swing head. At the same time, it can drive the swing head with multiple powers, reducing the torque borne by the support points of the swing head, further increasing the service life of the swing head. It can also pull the rotating shaft, making the rotating shaft not prone to tilt, and thus improving the machining accuracy of the workpiece.

[0029] 2. By providing a tooth groove and a first gear in the present invention, the cooperation between the first gear and the tooth groove can drive the support frame to rotate, thereby driving the second box body to rotate, providing an additional power for the rotation of the second box body, reducing the torque at the connection part of the second box body, protecting the second box body, and increasing the service life of the second box body.

[0030] 3. By providing a first belt pulley and a second belt pulley in the present invention, it can drive the first gear to rotate while the second box body rotates, thereby realizing the transformation from driving the second box body to rotate with one power to driving the second box body to rotate with three powers, directly coupling two groups of parts, ensuring completely synchronous actions, without relying on complex control algorithms, eliminating communication or response delay problems during the coordination of multiple motors, and improving the accuracy of the turntable.

[0031] 4. By providing a fixing ring and an arc-shaped clamping frame in the present invention, the arc-shaped clamping frame will pull the fixing ring, thereby increasing the fixing points of the installation table, enabling the arc-shaped clamping frame to hold the fixing ring, further sharing the supporting force of the torque motor on the installation table, and thus increasing the service life of the torque motor.

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

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

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

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

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

[0037] Figure 3 It is a Figure 2 partial sectional structure schematic diagram of a heavy-duty high-precision turntable for machine tools with strong anti-overturning proposed by the present invention;

[0038] Figure 4 It is a sectional structure schematic diagram of the vertical conversion module of a heavy-duty high-precision turntable for machine tools with strong anti-overturning proposed by the present invention;

[0039] Figure 5 It is a Figure 4 magnified structure schematic diagram of part A of a heavy-duty high-precision turntable for machine tools with strong anti-overturning proposed by the present invention;

[0040] Figure 6 It is a magnified structure schematic diagram of the horizontal conversion module of a heavy-duty high-precision turntable for machine tools with strong anti-overturning proposed by the present invention;

[0041] Figure 7 It is a Figure 6 exploded structure schematic diagram of a heavy-duty high-precision turntable for machine tools with strong anti-overturning proposed by the present invention;

[0042] Figure 8 It is a Figure 6 partial sectional structure schematic diagram of a heavy-duty high-precision turntable for machine tools with strong anti-overturning proposed by the present invention;

[0043] Figure 9Schematic diagram of the enlarged structure of the fixing module of a heavy-duty and high-precision turntable for machine tools with strong anti-overturning ability proposed by the present invention;

[0044] Figure 10 A heavy-duty and high-precision turntable for machine tools with strong anti-overturning ability proposed by the present invention Figure 9 Schematic diagram of the partial sectional structure;

[0045] Figure 11 Schematic diagram of the monitoring system process of a heavy-duty and high-precision turntable for machine tools with strong anti-overturning ability proposed by the present invention.

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

[0047] In order to make the objectives, technical solutions and advantages of the present invention clearer, 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 used to limit the present invention.

[0048] The serial numbers assigned to the components in this text itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0049] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0050] Refer to Figures 1 - 11 , a heavy-duty high-precision turntable for machine tools with strong anti-overturning ability, including a base 1 installed on the machine tool. A vertical conversion module 2 for changing the angle of the workpiece in the Y-axis direction is provided on the top of the base 1. A horizontal conversion module 3 for changing the angle of the workpiece in the Z-axis direction is provided inside the vertical conversion module 2. A support frame 6 for supporting the horizontal conversion module 3 is provided outside the horizontal conversion module 3. A support wheel 5 for supporting the support frame 6 is provided on the top of the base 1. A fixing module 4 for fixing the angle of the support frame 6 is provided on the top of the base 1. During use, the device is installed on the machine tool, and a heavy workpiece is placed on the horizontal conversion module 3. A special fixture is used to fix the workpiece. The machining of the angles of the X-axis and Y-axis of the workpiece can be adjusted through the vertical conversion module 2. When the angle is adjusted by the vertical conversion module 2, the support wheel 5 will support the support frame 6, thereby supporting the vertical conversion module 2 and the horizontal conversion module 3, so as to avoid the connection part from supporting the entire weight of the workpiece and the vertical conversion module 2 and the horizontal conversion module 3 as a whole, reduce the force on the rotating connection part of the vertical conversion module 2, improve the service life of the vertical conversion module 2, and at the same time improve the rotation accuracy of the vertical conversion module 2 and the anti-overturning ability of the turntable. The conversion of the Z-axis angle of the workpiece is realized through the horizontal conversion module 3, so that the workpiece can be machined in multiple directions.

[0051] In order to drive the workpiece to rotate along the X-axis or Y-axis, in the present invention, the vertical conversion module 2 includes a first box body 201 fixed to 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 fixed to one side of the second box body 301 by bolts. An installation plate 206 is fixed to the outer wall on one side of the first box body 201 by bolts. A servo motor 205 is fixed to the bottom of the installation plate 206 by bolts. A worm 207 driven by the servo motor 205 to rotate along the axis of the servo motor 205 and meshed with the worm gear 208 is provided on the top of the installation plate 206. The meshing of the worm gear 208 and the worm 207 has a one-way transmission property and at the same time has the effect of high-precision power transmission. A power component for driving the support bracket 6 to rotate assistingly is provided on the top of the base 1. When the servo motor 205 is started, the servo motor 205 drives the worm 207 to rotate, thereby driving the worm gear 208 to rotate, and then driving the second box body 301 to rotate. The power component drives the support bracket 6 to rotate assistingly along the rotation axis of the second box body 301, so as to reduce the torque for the worm gear 208 to drive the second box body 301 to rotate, and further improve the protection of the joints at both ends of the second box body 301, and further improve the service life of the turntable.

[0052] In order to drive the support bracket 6 to rotate assistingly, in the present invention, the power component includes a plurality of fixing plates 215 fixed to the top of the base 1 by bolts. A connecting shaft 203 is rotatably connected between the outermost fixing plates 215 through bearings. Two first gears 210 are key-connected to the middle part of the connecting shaft 203. Two tooth grooves 204 are formed on the circumferential outer wall of the support bracket 6. An avoidance groove 209 is formed on the outer wall of the top of the first box body 201. The top of the first gear 210 passes through the avoidance groove 209 and meshes with the tooth groove 204. When the connecting shaft 203 is rotated, the connecting shaft 203 drives the first gear 210 to rotate. When the first gear 210 meshes with the tooth groove 204, the support bracket 6 rotates along the rotation axis of the second box body 301, so as to share the torque required for the rotation of the second box body 301, and then make the second box body 301 rotate more easily. By driving two parts with one motor, the rotation of the second box body 301 driven by the worm gear 208 and the rotation of the second box body 301 driven by the first gear 210 are directly coupled, ensuring that the actions are completely synchronized, without relying on complex control algorithms, eliminating communication or response delay problems during the coordination of multiple motors, and improving the accuracy of the turntable.

[0053] In order to drive the rotation of the connecting shaft 203, in the present invention, first pulleys 202 are fixedly mounted on the circumferential outer walls at both ends of the second box body 301 by bolts. Both ends of the connecting shaft 203 are key-connected with third gears 214. An installation shaft 213 is rotatably connected between two fixing plates 215 at the same end through bearings. A second gear 212 meshing with the third gear 214 and a second pulley 211 cooperating with the first pulley 202 are key-connected to the circumferential outer wall of the installation shaft 213. The first pulley 202 and the second pulley 211 are both synchronous pulleys and are driven by a synchronous belt. 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. The transmission ratio between the tooth grooves 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, so as to realize the stable rotation of the second box body 301. Only one power is required to realize the stable rotation of the second box body 301. The structure is simple, the zero-delay transmission of power can be realized, and the subsequent maintenance cost of the equipment is reduced at the same time.

[0054] In order to drive the workpiece to rotate in the Z-axis direction, in the present invention, the horizontal conversion module 3 includes a mounting frame 310 fixedly connected between the inner walls on both sides of the second box body 301. A torque motor 309 is fixedly mounted on the top of the mounting frame 310 by bolts. The model of the torque motor 309 is HTMS03. An avoidance hole 307 is opened at the top of the second box body 301. The top of the torque motor 309 passes through the avoidance hole 307 and is fixedly mounted with a mounting table 304 by bolts. A mounting groove 311 is opened at the bottom of the mounting table 304. A support bearing 306 is clamped in the mounting groove 311 and is fixed to the second box body 301. The support bearing 306 can reduce the friction between the mounting table 304 and the second box body 301. The workpiece is placed on the mounting table 304, and a rotating fixture is used to fix the workpiece. The torque motor 309 is started. The torque motor 309 can drive the mounting table 304 to rotate, and then can drive the workpiece to rotate in the Z-axis direction. A monitoring component for monitoring the operation of the mounting table 304 is provided at the bottom of the mounting table 304. A fixing ring 303 is fixedly mounted on the bottom end of the circumferential outer wall of the mounting table 304 by bolts. A plurality of arc-shaped clamping frames 302 cooperating with the fixing ring 303 are fixedly mounted on the top of the support frame 6 by bolts. When the workpiece on the mounting table 304 is driven by the second box body 301 to rotate and tilt, the arc-shaped clamping frame 302 will pull the fixing ring 303, so that the fixing points of the mounting table 304 are increased, and then the arc-shaped clamping frame 302 can pull the fixing ring 303, and then share the supporting force of the torque motor 309 on the mounting table 304, thereby improving the service life of the torque motor 309.

[0055] In order to monitor the operation of the mounting table 304, in the present invention, the monitoring component includes a plurality of distance sensors 308 mounted on the top of the second box body 301, and the plurality of distance sensors 308 are evenly distributed on the outer circumference of the avoidance hole 307. The model of the distance sensor 308 is CJVL53L0XV2. A detection frame 305 used in cooperation with the distance sensor 308 is fixed to the bottom of the mounting table 304 by bolts. The circular runout of the detection plane of the detection frame 305 is not greater than 0.05 mm. The bottom diameter of the detection frame 305 is greater than the diameter of the avoidance hole 307. A plurality of displacement sensors 312 arranged in a cross-orthogonal layout are fixedly connected to the inner wall of the top of the second box body 301, and the probes of the displacement sensors 312 are in contact with the outer circumferential wall of the detection frame 305. The circularity tolerance of the contact surface between the detection frame 305 and the probe is not greater than 0.02 mm. The model of the displacement sensor 312 is POM-HDH8 pen-shaped LVDT displacement sensor. Therefore, the operation of the mounting table 304 is monitored in real time through the composed hybrid sensing system, so as to ensure the machining accuracy of the workpiece and improve the machining yield of the turntable.

[0056] In order to assist in fixing the adjusted support frame 6, in the present invention, the fixing module 4 includes a support plate 401 fixed to the top of the base 1. One side of the support plate 401 is fixed with a hydraulic cylinder 402 by bolts. Two sliding seats 403 are slidably connected to the top of the base 1. A connecting rod 405 is welded between the two sliding seats 403, and the moving end of the hydraulic cylinder 402 is fixed to one of the sliding seats 403. First friction plates 404 are fixed to the tops of the two sliding seats 403 by bolts. A placement groove is formed in the outer circumferential wall of the support frame 6, and a second friction plate 412 is bonded in the placement groove. A locking mechanism for assisting in fixing the connecting shaft 203 is provided at the top of the connecting rod 405. When the position of the second box body 301 does not need to be adjusted, the hydraulic cylinder 402 is started. The hydraulic cylinder 402 drives the two sliding seats 403 to move, so that the first friction plate 404 contacts the second friction plate 412, thereby fixing the angle between the support frame 6 and the second box body 301, so as to change the force received by the second box body 301, making the second box body 301 unable to rotate, reducing the torque received by 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 6, in the present invention, the locking mechanism includes two extrusion frames 406 fixed to the top of the connecting rod 405. Two 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 formed on one side of the positioning plate 408. Slide frames 407 are slidably connected in both of the two sliding holes. A brake pad 410 is fixed to the outer wall of one side of the slide frame 407 by bolts. A brake disc 411 used in cooperation with the brake pad 410 is fixed to the middle part of the circumferential outer wall 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 both slide frames 407 by bolts. When the slide base 403 moves, the slide base 403 drives the connecting rod 405 to move, thereby driving the extrusion frame 406 to move. The extrusion frame 406 extrudes the inclined surface on one side of the slide frame 407, so that the slide frame 407 moves in the sliding hole, and further makes the brake pad 410 contact the brake disc 411, thereby assisting in fixing the connecting shaft 203, further locking the power of the second box body 301, further preventing the position of the second box body 301 from changing, improving the fixing effect of the second box body 301, reducing the loss of the second box body 301, and at the same time being able to reduce the pressure between the worm gear 208 and the worm 207, so that the pressure received by 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 parts of the worm gear 208 and the worm 207, thereby protecting the worm gear 208 and the worm 207 and avoiding abnormal wear caused by excessive force, and improving the rotation accuracy of the turntable.

[0058] The monitoring process for the rotation and overturning accuracy monitoring component of the turntable 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-modal cyclic monitoring, that is, during the operation of the installation platform 304, use the distance sensor 308 to measure the distance between the detection frame 305 and the distance sensor 308, use the displacement sensor 312 to measure the offset of the detection frame 305, and process the data transmitted by the distance sensor 308 and the displacement sensor 312.

[0061] Step 3: The data processing is divided into three levels of warnings, namely primary warning, intermediate warning, and emergency shutdown. The primary warning is triggered by the displacement sensor 312, with a threshold of an offset of 0.02 mm. At this time, the machining feed rate is reduced by 50%, and a primary warning signal is sent out. The intermediate warning is triggered by the distance sensor 308, with a threshold of a moving distance of 0.03 mm. At this time, the machining parameters need to be adjusted, and an intermediate warning is sent out. The emergency shutdown is determined by a combination of the displacement sensor 312 and the distance sensor 308, with both thresholds being 0.05 mm. At this time, the machine stops machining, and a maintenance required signal is sent out, 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 benchmark operation of the equipment.

[0063] The present invention is used in the following steps:

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

[0065] S2: When it is necessary to rotate the workpiece about the X or Y axis, start the servo motor 205. The servo motor 205 drives the worm 207 to rotate, thereby driving the worm gear 208 to rotate, and further driving the second housing 301 to rotate, thereby driving the mounting table 304 and the workpiece to rotate together.

[0066] S3: When the second housing 301 rotates, the second housing 301 drives the first pulley 202 to rotate, 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 further 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 meshes with the tooth groove 204, the support frame 6 rotates along the rotation axis of the second housing 301, thereby sharing the torque required for the rotation of the second housing 301.

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

[0069] S6: When it is necessary to rotate the workpiece about the Z axis, start the torque motor 309. The torque motor 309 can drive the mounting table 304 to rotate, and further drive the workpiece to rotate about the Z axis.

[0070] S7: When the second box body 301 rotates, the workpiece on the mounting table 304 is driven by the second box body 301 to rotate and tilt. The arc-shaped holder 302 will pull the fixing ring 303, so that the number of fixing points of the mounting table 304 increases. As a result, the arc-shaped holder 302 can hold the fixing ring 303, and then share the supporting force of the torque motor 309 on the mounting table 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 started. The hydraulic cylinder 402 drives the two sliding seats 403 to move, so that the first friction plate 404 contacts the second friction plate 412, thereby fixing the angle between the support frame 6 and the second box body 301, changing the force on the second box body 301, making the second box body 301 unable to rotate, and reducing the torque on the second box body 301;

[0072] S9: At the same time, the sliding seat 403 will drive the connecting rod 405 to move, thereby driving the extrusion frame 406 to move. The extrusion frame 406 will extrude the inclined surface on one side of the sliding frame 407, so that the sliding frame 407 moves in the sliding 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. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0074] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A heavy-duty high-precision turntable for machine tools with strong anti-overturning ability, comprising a base (1) installed on the machine tool, characterized in that, At the top of the base (1), there is a vertical conversion module (2) for changing the Y-axis angle of the workpiece. Inside the vertical conversion module (2), there is a horizontal conversion module (3) for changing the Z-axis angle of the workpiece. Outside the horizontal conversion module (3), there is a support frame (6) for supporting the horizontal conversion module (3). At the top of the base (1), there is a support wheel (5) for supporting the support frame (6). At the top of the base (1), there is a fixing module (4) for fixing the angle of the support frame (6). The vertical conversion module (2) includes a first box body (201) fixed to 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). One side of the second box body (301) is fixedly connected with a worm gear (208). On the outer wall of one side of the first box body (201), there is a mounting plate (206). At the bottom of the mounting plate (206), there is a servo motor (205). At the top of the mounting plate (206), there is a worm (207) driven by the servo motor (205) to rotate along the axis of the servo motor (205) and meshing with the worm gear (208). At the top of the base (1), there is a power component for driving the support frame (6) to rotate. The power component includes a plurality of fixing plates (215) fixed to the top of the base (1). A connecting shaft (203) is rotatably connected between the outermost fixing plates (215) through bearings. Two first gears (210) are key-connected to the middle part of the connecting shaft (203). Two tooth grooves (204) are formed on the circumferential outer wall of the support frame (6). An avoidance groove (209) is formed on the outer wall of the top of the first box body (201). The top of the first gear (210) passes through the avoidance groove (209) and meshes with the tooth groove (204).

2. The heavy-duty high-precision turntable for machine tools with strong anti-overturning ability according to claim 1, characterized in that, First belt wheels (202) are fixedly connected to the circumferential outer walls at both ends of the second box body (301). Third gears (214) are key-connected to both ends of the connecting shaft (203). A mounting shaft (213) is rotatably connected between the two fixing plates (215) at the same end through bearings. A second gear (212) meshing with the third gear (214) and a second belt wheel (211) cooperating with the first belt wheel (202) are key-connected to the circumferential outer wall of the mounting shaft (213).

3. A heavy-duty high-precision turntable for machine tools with strong anti-overturning ability according to claim 1, characterized in that, The horizontal conversion module (3) includes a mounting frame (310) fixedly connected between the inner walls on both sides of the second box body (301). A torque motor (309) is fixedly connected to the top of the mounting frame (310). An avoidance hole (307) is formed in the top of the second box body (301). The top of the torque motor (309) passes through the avoidance hole (307) and is fixedly connected to a mounting table (304). A monitoring component for monitoring the operation of the mounting table (304) is provided at the bottom of the mounting table (304). A fixing ring (303) is fixedly connected to the bottom end of the circumferential outer wall of the mounting table (304). A plurality of arc-shaped clamping frames (302) cooperating with the fixing ring (303) are fixedly connected to the top of the support frame (6). A mounting groove (311) is formed in the bottom of the mounting table (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).

4. The heavy-duty high-precision turntable for machine tools with strong anti-overturning ability according to claim 3, characterized in that, The monitoring component includes a plurality of distance sensors (308) mounted on the top of the second box body (301), and the plurality of distance sensors (308) are evenly distributed on the circumferential outer side of the avoidance hole (307). A detection frame (305) cooperating with the distance sensors (308) is fixedly connected to the bottom of the mounting table (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 layout are fixedly connected to the inner wall of the top 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).

5. The heavy-duty high-precision turntable for machine tools with strong anti-overturning ability according to claim 1, wherein, The fixing module (4) includes a support plate (401) fixed to the top of the base (1). A hydraulic cylinder (402) is fixedly connected to one side of the support plate (401). Two sliding seats (403) are slidably connected to the top of the base (1). A connecting rod (405) is fixedly connected between the two sliding seats (403), and the moving end of the hydraulic cylinder (402) is fixed to one of the sliding seats (403). First friction plates (404) are fixedly connected to the tops of the two sliding seats (403). A placing groove is formed in the circumferential outer wall of the support frame (6), and a second friction plate (412) is bonded in the placing groove. A locking mechanism for assisting in fixing the connecting shaft (203) is provided at the top of the connecting rod (405).

6. The heavy-duty high-precision turntable for machine tools with strong anti-overturning ability according to claim 5, characterized in that, The locking mechanism includes two pressing frames (406) fixed to the top of the connecting rod (405). Two 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 formed in one side of the positioning plate (408). A sliding frame (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 sliding frame (407). A brake disc (411) cooperating with the brake pad (410) is fixedly connected to the middle part of the circumferential outer wall of the connecting shaft (203). A tension spring (409) fixed to the positioning plate (408) is fixedly connected to the inner wall of one side of each of the two sliding frames (407).

7. The heavy-duty high-precision turntable for machine tools with strong anti-overturning ability according to claim 2, wherein The transmission ratio between the tooth groove (204) and the first gear (210) is the same as that 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 synchronous belt drive is adopted.

8. An anti-overturning and highly loaded high-precision turntable for machine tools according to claim 4, characterized in that, The monitoring process for the rotation and overturning accuracy monitoring component of the turntable specifically includes the following steps: 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). Step 2: Dual-mode cyclic monitoring, that is, during the operation of the installation table (304), use the distance sensor (308) to measure the distance between the detection frame (305) and the distance sensor (308), use the displacement sensor (312) to measure the offset of the detection frame (305), and process the data transmitted by the distance sensor (308) and the displacement sensor (312). Step 3: The data processing is divided into three levels of early warnings, namely primary early warning, intermediate early warning, and emergency stop. The primary early warning is triggered by the displacement sensor (312), and the threshold is an offset of 0.02 mm. At this time, the machining feed rate is reduced by 50%, and a primary early warning signal is issued. The intermediate early warning is triggered by the distance sensor (308), and the threshold is a moving distance of 0.03 mm. At this time, the machining parameters need to be adjusted, and an intermediate early warning is issued. The emergency stop is determined by a combination of the displacement sensor (312) and the distance sensor (308), and the thresholds are both 0.05 mm. At this time, the machine stops machining, and a maintenance required signal is issued, 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 benchmark operation of the equipment.

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