A CNC machine tool worktable exchange device

Abstract

The present invention discloses a CNC machine tool workbench exchange device, including a workbench, a shell, and a bottom plate. A switching shaft is arranged on the bottom plate, and the upper end of the switching shaft is fixedly connected to a square block. Two workbenches are arranged on both sides of the square block. The workbenches are connected to the square block by a rotating propping assembly for switching. A control assembly is arranged under the switching shaft to control the rotation and lifting of the switching shaft. A shell is arranged outside the control assembly, and the shell is fixed on the bottom plate. The present invention sets a double workbench to cooperate with the switching shaft to switch between rough grinding and fine grinding. Each workbench can be separated from the exchange device, and the position and angle can be adjusted by the machine tool. There is no need to remove the parts separately for adjustment, thereby avoiding the precision error caused by repeated installation and disassembly, saving time, and improving processing efficiency. At the same time, the rotating propping assembly facilitates the transfer and separation of the workbench, and the control assembly ensures that the workbench does not rotate when it is separated, thereby avoiding the workbench from the machine tool.

Description

Technical Field

[0001] The invention relates to the field of numerically controlled machine tools, in particular to a working table exchange device for numerically controlled machine tools. Background Art

[0002] Most of the existing machine tools have only one workbench, and the processing of parts usually requires rough grinding before fine grinding. Processing a part even requires repeated switching. To ensure the smooth progress of the processing, the workpiece needs to be firmly fixed on the workbench. There is only a single workbench, and the parts need to be manually removed during the processing, and the parts need to be moved between the rough grinding and fine grinding machines. The installation and disassembly will consume a lot of time, slowing down the processing progress. Repeated installation and disassembly will cause the position of the parts on the workbench to change, thus causing errors in the processing accuracy. Summary of the invention

[0003] The object of the present invention is to provide a CNC machine tool worktable exchange device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a CNC machine tool worktable exchange device, comprising a worktable, a shell, and a base plate, a switching shaft is arranged on the base plate, the upper end of the switching shaft is fixedly connected to a square block, two worktables are arranged on both sides of the square block, the worktables are connected to the square block through a rotating support assembly for switching, a control assembly is arranged under the switching shaft to control the rotation and lifting of the switching shaft, a shell is arranged outside the control assembly, and the shell is fixed on the base plate.

[0005] Preferably, workbench moving grooves are provided on the four sides of the workbench.

[0006] Preferably, the rotating and spreading assembly comprises a rotating part and a spreading part, the rotating part drives the workbench to rotate and tilt, dumping the debris and waste materials, and the spreading part is used to connect to the workbench.

[0007] Preferably, the rotating part includes a rotating plate, a positioning ball, and a blanking triangular plate. The rotating plate is hinged on the square block through a torsion spring. A support portion is provided on the side of the rotating plate away from the square block, and a plurality of positioning balls are rotatably connected to the other side. The positioning balls are always pushed to move in the direction of the square block by springs. The square block is provided with grooves at positions corresponding to the positioning balls. The blanking triangular plate is fixedly connected to the shell, and the blanking triangular plate can contact and connect the rotating plate.

[0008] Preferably, the expansion part includes an expansion cross bar and an expansion extension rod, an expansion slot is provided in the rotating plate, two expansion guide rails are provided in the expansion slot, two expansion cross bars are slidably connected in the expansion slot, a ball screw pair at one end of the expansion cross bar is connected to the expansion screw, and the other end does not extend out of the expansion slot, one end of the expansion cross bar is slidably connected to an expansion extension rod, and the other end of the expansion extension rod is slidably connected to the workbench moving slot, the expansion extension rod is fixedly connected to the expansion guide block at one end close to the expansion screw, the expansion guide block extends out of the expansion cross bar and is slidably connected in the expansion guide rail, so that the expansion cross bars retract the expansion rods when they are close to each other, and extend the expansion rods when they are far away from each other, and the expansion screw is rotatably connected to the rotating plate and driven by the screw drive mechanism.

[0009] Preferably, the screw drive mechanism drives an open worm wheel, an open worm, and an open gear. One end of the open screw is fixedly connected to the open worm wheel, which meshes with the open worm. One end of the open worm is fixedly connected to the open gear, which can mesh with the open rack. Two open racks are provided, which are fixedly connected to the housing in a centrally symmetrical manner. The open worm wheel, the open worm, and the open gear are rotatably connected to the rotating plate, and the open gear is partially exposed from the rotating plate.

[0010] Preferably, the control component comprises a rotating part, a lifting part and a driving locking part, the rotating part and the lifting part are driven by the driving locking part, the rotating part drives the switching shaft to rotate, and the lifting part drives the switching shaft to rise and fall.

[0011] Preferably, the drive locking part includes a shaft bevel gear, a shaft gear, and a locking rod, the shaft bevel gear and the shaft gear are each provided with two, the two shaft bevel gears mesh with each other, one shaft bevel gear is coaxially arranged with a shaft gear, and the two are commonly connected to the output end of the motor, the motor is fixedly connected to the motor base, the motor base slides in the base plate, the motor base is fixedly connected to the output end of the electric push rod, and the electric push rod is fixed in the base plate; the locking rods are provided with four, and the bottom surface of the switching shaft is provided with four locking grooves, the locking rod can be inserted into the locking grooves, the four locking rods are all fixedly connected to the cross, the cross is fixedly connected to the locking guide block, the locking guide block is provided with an inclined surface, the inclined surface is slidably connected to the motor base, one end of the locking spring is fixedly connected to the lower part of the locking guide block, and the other end of the locking spring is fixed in the base plate, and the locking spring always pushes the locking guide block to move upward, the locking guide block, the cross, and the locking rod are all slidably connected in the base plate, and one end of the locking rod extends out of the base plate; the lower end of the switching shaft rotates and slidably connects to one end of the limit column, and the other end of the limit column is fixedly connected to the base plate.

[0012] Preferably, the rotating part includes a shaft worm wheel and a shaft worm, the shaft worm wheel is fixedly connected to the lower end of the switching shaft, the shaft worm wheel is meshed with the shaft worm, one end of the shaft worm is fixedly connected to the shaft bevel gear, both ends of the shaft worm are rotatably connected to the middle part of a worm upper frame, one end of the worm upper frame is slidably connected to the worm lower frame, and the other end is fixedly connected to a frame slider, the frame slider slides in the frame slide rail, the frame slide rail is set on the shaft worm wheel, and the worm lower frame is fixedly connected to the base plate.

[0013] Preferably, the lifting part includes an axial screw and a shaft sleeve, the lower end of the axial screw is fixedly connected to the shaft gear, the shaft gear is meshed with the reversing gear, the reversing gear can be meshed with the shaft gear connected to the motor, the axial screw ball screw pair is connected to one end of the shaft sleeve, and the other end of the shaft sleeve is rotatably connected to the switching shaft, and the shaft gear and the reversing gear are rotatably connected to the base plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention switches between rough grinding and fine grinding by setting up a double workbench with a switching shaft, each workbench can be separated from the exchange device, and the position and angle can be adjusted by the machine tool, without having to remove the parts separately for adjustment, thus avoiding the precision error caused by repeated installation and disassembly, saving time and improving processing efficiency. At the same time, the rotating propping assembly facilitates the transfer and separation of the workbench, and the control assembly ensures that the workbench does not rotate when it is separated, thus preventing the workbench from detaching from the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention without the casing;

[0017] Figure 3 This is a schematic diagram of the structure of the present invention without a workbench;

[0018] Figure 4 for Figure 2 A local enlarged view of point A;

[0019] Figure 5 It is a structural schematic diagram of the driving locking part of the present invention;

[0020] Figure 6 for Figure 3 A local enlarged view of point B;

[0021] Figure 7 It is a structural schematic diagram of the propping part of the present invention;

[0022] Figure 8 It is a schematic diagram of the cross-sectional structure of the rotating plate of the present invention.

[0023] In the figure: 1, workbench, 101, workbench moving groove, 2, square block, 201, rotating plate, 202, open groove, 203, open cross bar, 204, open extension rod, 205, open guide block, 206, open screw rod, 207, open worm gear, 208, open worm, 209, open gear, 210, open rack, 211, open guide rail, 212, positioning ball, 213, blanking triangle plate, 3, switching axis, 301, axis Worm gear, 302, shaft worm, 303, shaft bevel gear, 304, worm upper frame, 305, frame slider, 306, frame slide rail, 307, worm lower frame, 308, shaft gear, 309, reversing gear, 310, motor base, 311, locking guide block, 312, locking spring, 313, cross, 314, locking rod, 315, locking groove, 316, limiting column, 317, shaft screw, 318, shaft sleeve, 4, housing, 5, bottom plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-8, in order to solve the problem that most existing machine tools have only one workbench, and processing a part even requires repeated switching, a double workbench is set to cooperate with a switching shaft to switch between rough grinding and fine grinding, each workbench can be separated from the exchange device, and the position and angle can be adjusted by the machine tool, without having to remove the parts separately for adjustment, avoiding the precision error caused by repeated installation and disassembly, saving time and improving processing efficiency. At the same time, the workbench is convenient to transfer and separate by rotating the propping assembly, and the control assembly is used to ensure that the workbench does not rotate when separating, so as to avoid the workbench from the machine tool. The present invention provides a technical solution: a CNC machine tool workbench exchange device, including a workbench 1, a shell 4, and a bottom plate 5, a switching shaft 3 is arranged on the bottom plate 5, the upper end of the switching shaft 3 is fixedly connected to a square block 2, two workbenches 1 are arranged on both sides of the square block 2, the workbench 1 is connected to the square block 2 by a rotating propping assembly for switching, a control assembly is arranged under the switching shaft 3 to control the rotation and lifting of the switching shaft 3, and a shell 4 is arranged outside the control assembly, and the shell 4 is fixed on the bottom plate 5. In this application, the electric components such as the motor cylinder push rod are all of existing models. When in use, the control component is started, and the control component controls the rotation and lifting of the switching shaft 3. The rotation of the switching shaft 3 drives the square block 2 to rotate, and the rotation of the square block 2 drives the workbench 1 to rotate. When the two workbenches 1 rotate to the positions of the rough grinding machine and the fine grinding machine on both sides, the switching shaft 3 lowers the height, the switching shaft 3 drives the square block 2 to lower, and the square block 2 drives the workbench 1 to lower. During the lowering process of the workbench 1, the rotating and spreading component gradually loosens the workbench 1, so that the workbench 1 falls on the support mechanism of the machine tool for the workbench, which is convenient for the machine tool to drive the workbench 1 to move or rotate in the xyz direction. According to needs, a device that is convenient for connecting with the machine tool can be set under the workbench, such as a boss and a round hole for positioning, including but not limited to this form. When the processing is completed, the switching shaft 3 drives the workbench 1 to rotate to the vertical direction of the connection line between the rough grinding machine and the fine grinding machine, lowers the switching shaft 3, and the square block 2 makes one of the workbenches 1 flip over a certain angle. At this time, the debris and waste on the workbench 1 are cleaned with a spray or air gun, and the other workbench 1 can be loaded and unloaded.

[0026] In order to facilitate the control of the workbench, a rotating and spreading assembly is provided. The rotating and spreading assembly includes a rotating part and a spreading part. The rotating part drives the workbench 1 to rotate and tilt to dump the debris and waste materials. The spreading part is used to connect the workbench 1.

[0027] In order to facilitate the cleaning of the workbench, a rotating part is provided, which includes a rotating plate 201, a positioning ball 212, and a blanking triangular plate 213. The rotating plate 201 is hinged on the square block 2 through a torsion spring. A support portion is provided on the side of the rotating plate 201 away from the square block 2, and a plurality of positioning balls 212 are rotatably connected on the other side. The positioning balls 212 are always pushed to move in the direction of the square block 2 by springs. The square block 2 is provided with grooves at positions corresponding to the positioning balls 212. The blanking triangular plate 213 is fixedly connected to the shell 4. The blanking triangular plate 213 is not provided on the center line of the shell 4, and the blanking triangular plate 213 can contact and connect the rotating plate 201. When the switching shaft 3 drives the square block 2 to rotate, so that one of the workbenches 1 rotates to the side of the blanking triangle plate 213, the switching shaft 3 is lowered, and the switching shaft 3 drives the square block 2 to lower its height, and the square block 2 drives the rotating plate 201 to lower, and one side of the rotating plate 201 contacts the blanking triangle plate 213 and is lifted up by the blanking triangle plate 213, so that the rotating plate 201 rotates and tilts, and the rotating plate 201 drives the workbench 1 to rotate and tilt. In this process, the torsion spring is deformed by force, and the ball 212 is retracted into the rotating plate 201. When the cleaning is completed, the switching shaft 3 drives the square block 2 to rise, and the rotating plate 201 returns to the horizontal state under the action of the torsion spring, and the ball 212 is stuck in the corresponding groove of the square block 2.

[0028] In order to facilitate the movement of the workbench, an expansion part is provided, which includes an expansion cross bar 203 and an expansion extension rod 204. An expansion slot 202 is provided in the rotating plate 201, and two expansion guide rails 211 are provided in the expansion slot 202. Two expansion cross bars 203 are slidably connected in the expansion slot 202. The ball screw pair at one end of the expansion cross bar 203 is connected to the expansion screw rod 206, and the other end does not extend out of the expansion slot 202. Each expansion cross bar 203 is slidably connected to one end of an expansion extension rod 204. The other end of the extension rod 204 is slidably connected in the workbench moving groove 101, and one end of the extension rod 204 close to the extension screw 206 is fixedly connected to the extension guide block 205, and the extension guide block 205 extends the extension cross bar 203 and is slidably connected in the extension guide rail 211, so that the extension rod 204 retracts when the two extension cross bars 203 are close to each other, and extends when the extension rod 204 is far away from each other, and the extension screw 206 is rotatably connected in the rotating plate 201 and driven by the screw drive mechanism. The workbench moving grooves 101 are arranged on the four sides of the workbench 1. When in use, the expansion screw rod 206 is driven to rotate by the screw rod driving mechanism, and the rotation of the expansion screw rod 206 causes the two expansion cross bars 203 to move toward or away from each other in the expansion slot 202, and the expansion cross bar 203 drives the expansion extension rod 204 to move, and the expansion extension rod 204 drives the expansion guide block 205 to move, so that the expansion guide block 205 slides in the expansion guide rail 211. Through the setting of the expansion guide rail 211, the expansion extension rod 204 is extended when the two expansion cross bars 203 are far away from each other, and the expansion extension rod 204 is retracted when the two expansion cross bars 203 are close to each other; when the expansion cross bars 203 move to the maximum distance away from each other, the expansion extension rod 204 just supports the inner wall surface of the workbench moving slot 101, and when the two expansion cross bars 203 are close to the minimum distance, the expansion extension rod 204 just retracts into the expansion cross bar 203, and the workbench 1 is released and can be driven to move by the machine tool. The height and depth of the workbench moving groove 101 are both greater than the extended rod 204 .

[0029] In order to make the expansion part move in coordination with the lifting and lowering of the switching shaft 3, a screw drive mechanism is provided. The screw drive mechanism drives the expansion worm wheel 207, the expansion worm 208, and the expansion gear 209. One end of the expansion screw 206 is fixedly connected to the expansion worm wheel 207, the expansion worm wheel 207 is meshed with the expansion worm 208, and one end of the expansion worm 208 is fixedly connected to the expansion gear 209. The expansion gear 209 can be meshed with the expansion rack 210. Two expansion racks 210 are provided, which are fixedly connected to the housing 4 in a centrally symmetrical manner. The expansion worm wheel 207, the expansion worm 208, and the expansion gear 209 are rotatably connected to the rotating plate 201, and the expansion gear 209 is partially exposed from the rotating plate 201. When the switching shaft 3 descends, the square block 2 descends accordingly, and the rotating plate 201 drives the expansion gear 209 to move downward, so that the expansion gear 209 engages with the expansion rack 210, thereby driving the expansion gear 209 to rotate, and the expansion gear 209 drives the expansion worm 208 to rotate, and the rotation of the expansion worm 208 drives the expansion worm wheel 207 to rotate, and the expansion worm wheel 207 drives the expansion screw 206 to rotate, and the rotation of the expansion screw 206 causes the two expansion extension rods 204 to approach each other when the switching shaft 3 is lowered, and the two expansion extension rods 204 to move away from each other when the switching shaft 3 rises.

[0030] In order to facilitate the control of the switching shaft 3, a control component is provided, which includes a rotating part, a lifting part and a driving locking part. The rotating part and the lifting part are driven by the driving locking part. The rotating part drives the switching shaft 3 to rotate, and the lifting part drives the switching shaft 3 to rise and fall. The driving locking part can lock the switching shaft 3 so that it cannot rotate.

[0031] In order to ensure that the switching shaft 3 does not rise or fall when rotating, and does not rotate when rising or falling, a driving locking part is provided, which includes a shaft bevel gear 303, a shaft gear 308, and a locking rod 314. The shaft bevel gear 303 and the shaft gear 308 are both provided with two shaft bevel gears 303, and the two shaft bevel gears 303 are meshed with each other, and one shaft bevel gear 303 is coaxially arranged with a shaft gear 308, and the two are connected to the output end of the motor, and the motor is fixedly connected to the motor base 310, and the motor base 310 slides in the bottom plate 5, and the motor base 310 is fixedly connected to the output end of the electric push rod, and the electric push rod is fixed in the bottom plate 5; four locking rods 314 are provided, and four locking grooves 315 are provided on the bottom surface of the switching shaft 3, and the locking rod 314 can be inserted into the locking groove 3 15, four locking rods 314 are all fixedly connected to the cross 313, the cross 313 is fixedly connected to the locking guide block 311 directly or through the locking rod 314, the locking guide block 311 is provided with an inclined surface, the inclined surface is slidably connected to the motor base 310, one end of the locking spring 312 is fixedly connected to the bottom of the locking guide block 311, the other end of the locking spring 312 is fixedly connected to the bottom of the base plate 5, the locking spring 312 always pushes the locking guide block 311 to move upward, the locking guide block 311, the cross 313, and the locking rod 314 are all slidably connected to the base plate 5, and one end of the locking rod 314 extends out of the base plate 5; the lower end of the switching shaft 3 rotates and slidably connects to one end of the limiting column 316, and the other end of the limiting column 316 is fixedly connected to the base plate 5. During use, when the switching shaft 3 needs to rotate, the electric push rod is in an extended state. At this time, the two shaft bevel teeth 303 are in a meshing state, the rotating part is started, and the switching shaft 3 can only rotate. When the switching shaft 3 needs to be lifted or lowered, the electric push rod is in a shortened state, the shaft gear 308 and the reversing gear 309 are in a meshing state, the lifting part is started, and the rotation direction of the switching shaft 3 is locked, and only up and down movement can occur. The locking rod 314 is lifted up and inserted into the locking groove 315, thereby locking the switching shaft 3 so that it can only move up and down but not rotate. The depth of the locking groove 315 is greater than the length of the locking rod 314, thereby reserving space for the subsequent descent of the switching shaft 3; when switching from the lifting part to the rotating part, the electric push rod is extended, and the electric push rod drives the motor base 310 to move. The motor base 310 uses the inclined surface to press the locking guide block 311 back into the bottom plate 5, the locking spring 312 is compressed, and the locking rod 314 leaves the locking groove 315. At this time, the switching shaft 3 can rotate.

[0032] In order to enable the switching shaft 3 to rotate, a rotating part is provided, which includes a shaft worm wheel 301 and a shaft worm 302. The shaft worm wheel 301 is fixedly connected to the lower end of the switching shaft 3, the shaft worm wheel 301 is meshed with the shaft worm 302, one end of the shaft worm 302 is fixedly connected to the shaft bevel gear 303, and both ends of the shaft worm 302 are rotatably connected to the middle part of a worm upper frame 304. One end of the worm upper frame 304 is slidably connected to the worm lower frame 307, and the other end is fixedly connected to the frame slider 305. The frame slider 305 slides in the frame slide rail 306. The frame slide rail 306 is set on the shaft worm wheel 301, and the worm lower frame 307 is fixedly connected to the base plate 5. When in use, start the motor, the motor drives the shaft bevel gear 303 to rotate, the two shaft bevel gears 303 rotate synchronously, the shaft bevel gear 303 drives the shaft worm 302 to rotate, the shaft worm 302 drives the shaft worm wheel 301 to rotate, and the shaft worm wheel 301 drives the switching shaft 3 to rotate. When not driven, the worm gear is self-locking; in order to avoid collision of the teeth of the worm gear during the lifting process, a worm rack 304 is provided. When the switching shaft 3 rises, the switching shaft 3 drives the shaft worm wheel 301 to rise, and the shaft worm wheel 301 drives the worm rack 304 to rise. When descending, the deadweight and the cooperation of the rack slider 305 and the rack slide rail 306 are used for synchronous descent. The rack slider 305 slides in the rack slide rail 306 so that the worm rack 304 is not affected during the rotation of the shaft worm wheel 301.

[0033] In order to enable the switching shaft 3 to be lifted and lowered, a lifting part is provided, and the lifting part includes a shaft screw 317 and a shaft sleeve 318. The lower end of the shaft screw 317 is fixedly connected to the shaft gear 308, and the shaft gear 308 is meshed with the reversing gear 309. The reversing gear 309 can be meshed with the shaft gear 308 connected to the motor. The shaft screw 317 ball screw pair is connected to one end of the shaft sleeve 318, and the other end of the shaft sleeve 318 is rotatably connected to the switching shaft 3. The shaft gear 308 and the reversing gear 309 are rotatably connected to the bottom plate 5. When in use, the motor is started, and the motor drives the shaft gear 308 to rotate. The two shaft gears 308 rotate synchronously through the reversing gear 309, and the shaft gear 308 drives the shaft screw 317 to rotate. The rotation of the shaft screw 317 causes the shaft sleeve 318 to move up and down, and the shaft sleeve 318 drives the switching shaft 3 to move and lift.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CNC machine tool workbench exchange device, comprising a workbench (1), a housing (4), and a bottom plate (5), characterized in that: The bottom plate (5) is provided with a switching shaft (3), the upper end of the switching shaft (3) is fixedly connected to the square block (2), two workbenches (1) are provided on both sides of the square block (2), the workbenches (1) are connected to the square block (2) through a rotating and spreading assembly for switching, a control assembly is provided under the switching shaft (3) to control the rotation and lifting of the switching shaft (3), a shell (4) is provided outside the control assembly, and the shell (4) is fixed on the bottom plate (5); The control assembly comprises a rotating part, a lifting part and a driving locking part, wherein the rotating part and the lifting part are driven by the driving locking part, the rotating part drives the switching shaft (3) to rotate, and the lifting part drives the switching shaft (3) to rise and fall; The drive locking portion comprises a shaft bevel gear (303), a shaft gear (308), and a locking rod (314); two shaft bevel gears (303) and two shaft gears (308) are provided, the two shaft bevel gears (303) are meshed with each other, one shaft bevel gear (303) is coaxially arranged with one shaft gear (308), and the two are connected to the output end of the motor; the motor is fixedly connected to the motor base (310), the motor base (310) slides in the bottom plate (5), the motor base (310) is fixedly connected to the output end of the electric push rod, and the electric push rod is fixed in the bottom plate (5); four locking rods (314) are provided, and four locking grooves (315) are provided on the bottom surface of the switching shaft (3), the locking rods (314) can be inserted into the locking grooves (315), and the four locking rods (314) ) are all fixedly connected to the cross (313), the cross (313) is fixedly connected to the locking guide block (311), the locking guide block (311) is provided with an inclined surface, the inclined surface is slidably connected to the motor base (310), one end of the locking spring (312) is fixedly connected to the bottom of the locking guide block (311), the other end of the locking spring (312) is fixedly connected to the bottom of the bottom plate (5), the locking spring (312) always pushes the locking guide block (311) to move upward, the locking guide block (311), the cross (313), and the locking rod (314) are all slidably connected to the bottom plate (5), and one end of the locking rod (314) extends out of the bottom plate (5); the lower end of the switching shaft (3) is rotatably and slidably connected to one end of the limiting column (316), and the other end of the limiting column (316) is fixedly connected to the bottom plate (5); The rotating and spreading assembly comprises a rotating part and a spreading part, the rotating part drives the workbench (1) to rotate and tilt, and dumps the debris and waste materials, and the spreading part is used to connect to the workbench (1); The rotating part comprises a rotating plate (201), a positioning ball (212), and a blanking triangular plate (213); the rotating plate (201) is hinged on the square block (2) via a torsion spring; a side of the rotating plate (201) away from the square block (2) is provided with a spreading portion; the other side is rotatably connected to a plurality of positioning balls (212); the positioning balls (212) are always pushed by springs to move in the direction of the square block (2); the square block (2) is provided with grooves at positions corresponding to the positioning balls (212); the blanking triangular plate (213) is fixedly connected to the housing (4); and the blanking triangular plate (213) can contact and connect the rotating plate (201); The expansion part comprises an expansion cross bar (203) and an expansion extension rod (204); an expansion slot (202) is provided in the rotating plate (201); two expansion guide rails (211) are provided in the expansion slot (202); two expansion cross bars (203) are slidably connected in the expansion slot (202); a ball screw pair at one end of the expansion cross bar (203) is connected to the expansion screw rod (206); the other end does not extend out of the expansion slot (202); one end of an expansion extension rod (204) is slidably connected to each expansion cross bar (203); the expansion extension rod (204) ) and the other end is slidably connected in the workbench moving groove (101); one end of the spreading and extending rod (204) close to the spreading screw rod (206) is fixedly connected to the spreading guide block (205); the spreading guide block (205) extends out of the spreading cross rod (203) and is slidably connected in the spreading guide rail (211), so that the spreading and extending rod (204) retracts when the two spreading cross rods (203) are close to each other, and extends when the two spreading cross rods (203) are far away from each other; the spreading and extending rod (204) is rotatably connected in the rotating plate (201) and driven by the screw rod driving mechanism; The rotating part comprises a shaft worm wheel (301) and a shaft worm (302); the shaft worm wheel (301) is fixedly connected to the lower end of the switching shaft (3); the shaft worm wheel (301) meshes with the shaft worm (302); one end of the shaft worm (302) is fixedly connected to the shaft bevel gear (303); both ends of the shaft worm (302) are rotatably connected to the middle part of a worm upper frame (304); one end of the worm upper frame (304) is slidably connected to a worm lower frame (307); the other end is fixedly connected to a frame slider (305); the frame slider (305) slides in a frame slide rail (306); the frame slide rail (306) is arranged on the shaft worm wheel (301); and the worm lower frame (307) is fixedly connected to the bottom plate (5).

2. A CNC machine tool worktable exchange device according to claim 1, characterized in that: The four sides of the workbench (1) are all provided with workbench moving grooves (101).

3. The CNC machine tool worktable exchange device according to claim 1, characterized in that: The screw drive mechanism drives an extended worm wheel (207), an extended worm (208), and an extended gear (209); one end of the extended screw (206) is fixedly connected to the extended worm wheel (207); the extended worm wheel (207) meshes with the extended worm (208); one end of the extended worm (208) is fixedly connected to the extended gear (209); the extended gear (209) can mesh with an extended rack (210); two extended racks (210) are provided and are fixedly connected to the housing (4) in a centrally symmetrical manner; the extended worm wheel (207), the extended worm (208), and the extended gear (209) are rotatably connected to the rotating plate (201); the extended gear (209) is partially exposed from the rotating plate (201).

4. The CNC machine tool worktable exchange device according to claim 1, characterized in that: The lifting part comprises an axial screw rod (317) and a shaft sleeve (318); the lower end of the axial screw rod (317) is fixedly connected to a shaft gear (308); the shaft gear (308) meshes with a reversing gear (309); the reversing gear (309) can mesh with a shaft gear (308) connected to a motor; the axial screw rod (317) ball screw pair is connected to one end of the shaft sleeve (318); the other end of the shaft sleeve (318) is rotatably connected to the switching shaft (3); the shaft gear (308) and the reversing gear (309) are rotatably connected to the bottom plate (5).

Images