A convertible fixture for CNC machine tools

Abstract

The present invention relates to the technical field of CNC machine tools, and specifically to a convertible fixture for CNC machine tools, comprising: a driving mechanism is arranged on a rotating table, an adjusting mechanism is arranged on the driving mechanism, and a clamping mechanism is arranged on the adjusting mechanism; the present invention cooperates with the driving mechanism and the adjusting mechanism to realize the functions of quickly converting and docking a plurality of different fixtures and automatically and stably positioning them, thereby greatly reducing the operational burden of manually disassembling and assembling the fixtures, reducing the overall labor cost, and improving the overall processing efficiency of the workpiece; the present invention cooperates with the driving mechanism and the clamping mechanism to realize the clamping methods of different fixtures being adapted by a single driving source, thereby reducing the overall maintenance cost of the equipment, avoiding frequent disassembly and assembly of the fixtures, and reducing the storage space required for idle fixtures, thereby not only greatly reducing the risk of fixture damage, but also reducing the overall space cost.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled machine tools, in particular to a convertible fixture for numerically controlled machine tools. Background Art

[0002] A CNC machine tool is an automated processing equipment controlled by a computer. Its working principle is to control the processing tool through pre-programmed computer instructions to perform high-precision processing on the workpiece clamped on the processing table. In the prior art, the workpiece to be processed in a CNC machine tool is usually clamped and fixed by a corresponding fixture on the processing table, and different fixtures are suitable for workpieces of different shapes. When clamping small workpieces of different shapes, it is usually necessary to manually replace the original fixture on the processing table with a fixture that is suitable for the shape of the workpiece.

[0003] However, the traditional method of manually replacing small workpiece fixtures of CNC machine tools has the following problems: when the CNC machine tool needs to process workpieces of various shapes, manually replacing the fixture will greatly increase the overall operating burden and labor cost of the manual operation, and the time taken for manual disassembly and assembly of the fixture will lead to a decrease in the overall processing efficiency of the workpiece. At the same time, frequent disassembly and assembly of the fixture will inevitably lead to a greatly increased risk of damage to the fixture and the processing table, and the disassembled idle fixtures also require a certain amount of storage and maintenance space, which further leads to an increase in the overall space cost. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a convertible fixture of a CNC machine tool, comprising a rotating table and a motor installed on the rear side of the rotating table, a driving mechanism is arranged on the rotating table, an adjusting mechanism is arranged on the front side of the driving mechanism, and a clamping mechanism is arranged on the adjusting mechanism.

[0005] The driving mechanism includes a rotating cylinder rotatably arranged on a rotating platform and fixedly connected to the driving end of a motor, a driving component 1 is arranged in the rotating cylinder, a docking component is arranged at the front end of the rotating cylinder, and a positioning component is arranged on the driving component 1 and the docking component.

[0006] The adjustment mechanism includes a docking frame that is rotatably arranged on the front end of the rotating cylinder and the docking assembly. Three groups of adjustment components and three groups of mounting components corresponding to the adjustment components are evenly arranged circumferentially on the docking frame. A driving component 2 located at the lower side of the docking frame is arranged on the front side of the rotating table. A gear ring that is rotatably connected to the rotating cylinder is fixedly arranged at the rear end of the docking frame.

[0007] The clamping mechanism comprises a plate clamp installed on the upper mounting assembly, an upper and lower clamp installed on the left mounting assembly, and a centering clamp installed on the right mounting assembly.

[0008] Preferably, the driving component 1 comprises a multi-stage hydraulic cylinder fixedly arranged in the rotating cylinder, a primary piston rod is installed in the multi-stage hydraulic cylinder, a secondary piston rod is installed in the primary piston rod, and a push plate that moves forward and backward is fixedly arranged at the telescopic end of the secondary piston rod.

[0009] Preferably, the docking assembly includes a positioning turntable fixedly arranged on the front side of the rotating cylinder, and a docking groove one with an upper end penetrating therethrough is symmetrically provided on the front surface of the positioning turntable, wherein the cross-section of the docking groove one is T-shaped, and a receiving groove is provided on the positioning turntable that passes through the front and rear and for the push plate to slide through, wherein the receiving groove is located between the two docking grooves one.

[0010] Preferably, the positioning assembly includes spring rods symmetrically fixed on the rear side of the positioning turntable, sliding plates are elastically slidably arranged on the symmetrical spring rods, the symmetrical sliding plates correspond to the docking grooves one by one respectively, and positioning rods are symmetrically fixed on the front side of the sliding plates, which slide back and forth and pass through the positioning turntable and the corresponding docking groove one, and a connecting plate 1 that is slidably connected to the primary piston rod is fixed between the symmetrical sliding plates.

[0011] Preferably, the adjustment component includes two docking grooves which are symmetrically opened on the front surface of the docking frame and correspond one to one with the docking grooves, wherein the cross-section of the docking grooves is the same as the cross-section of the docking grooves, and the end of the docking grooves two close to the positioning turntable is through-set, and the rear side of the docking frame is elastically slidably provided with connecting plates two corresponding to each group of symmetrical docking grooves two, and the front side of the connecting plates two is symmetrically fixed with elastic plug-ins which slide forward and backward and penetrate the docking frame and the corresponding docking grooves two.

[0012] Preferably, the driving component 2 includes a fixed seat fixedly arranged on the front side of the rotating table, a pneumatic cylinder is fixedly arranged on the left side of the fixed seat, a connecting plate 3 that moves left and right is fixedly arranged on the telescopic end of the pneumatic cylinder, and a rack that is meshed with the gear ring is fixedly arranged on the upper end of the connecting plate 3.

[0013] Preferably, the installation assembly includes a T-shaped sliding column symmetrically and slidingly arranged in the corresponding docking groove two, a positioning plate is fixedly arranged on the front side of the symmetrical T-shaped sliding column, and the T-shaped sliding column and the corresponding positioning plate are jointly provided with a front-to-back through positioning hole, and the positioning hole on the positioning plate away from the end of the positioning turntable is plug-matched with the corresponding elastic plug-in, and connecting plates four are symmetrically fixedly arranged between the symmetrical positioning plates, wherein the paired positioning plates and the corresponding paired connecting plates four are vertically distributed and together form a circular frame.

[0014] Preferably, the plate clamp includes a clamping table one fixedly arranged on the front side of the upper return-shaped frame, a plurality of debris grooves are evenly opened on the upper surface of the clamping table one, a baffle plate is fixedly arranged at the front end of the clamping table one, a guide rail one is fixedly arranged symmetrically on the upper side of the clamping table one and located on the rear side of the baffle plate, a slider one is slidingly arranged on the guide rail one, and a connecting plate five that cooperates with the push plate for transmission is fixedly arranged between the left and right symmetrical sliders one.

[0015] Preferably, the upper and lower clamps include a clamping table 2 fixedly arranged on the front side of the left return frame, a guide rail 2 is symmetrically fixedly arranged on the clamping table 2, a slider 2 is slidably arranged on the guide rail 2 for front and rear sliding, a wedge-shaped column that cooperates with the push plate for transmission is fixedly arranged between the symmetrical sliders, wherein the front side of the wedge-shaped column is an inclined surface, and two groups of pillars are symmetrically fixedly arranged on the clamping table 2 and located on the front side of the guide rail 2, each group consists of two pillars that are symmetrical front and back, a linear groove is opened on the end of the pillar close to the clamping table 2, an upper clamping plate is commonly fixedly arranged on the ends of the four pillars away from the clamping table 2, a lower clamping plate is commonly slidably arranged between the two symmetrical groups of pillars and located on the side of the upper clamping plate close to the clamping table 2, wherein the rear side of the lower clamping plate is also an inclined surface and cooperates with the inclined surface on the front side of the wedge-shaped column for transmission, and a sliding shaft that corresponds one-to-one to the pillars and is slidably connected to the corresponding linear grooves is fixedly arranged on the lower clamping plate.

[0016] Preferably, the centering fixture includes a clamping platform three fixedly arranged on the front side of the right return frame through a rod one, a cross slide slidably connected to the rod one is slidably arranged on the rear side of the clamping platform three, wherein the cross slide cooperates with the push plate for transmission, four connecting plates six are evenly fixedly arranged on the cross slide, four guide rails three corresponding to the connecting plates six are evenly fixedly arranged on the front side of the clamping platform three, a slider three is slidably arranged on the guide rail three, an L-shaped clamping plate is fixedly arranged on the front side of the slider three, a transmission plate is rotatably arranged on the side of the L-shaped clamping plate away from the center of the clamping platform three through a support one, and the rear end of the transmission plate is rotatably connected to the corresponding connecting plate six through a support two.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention can realize the functions of rapid conversion and docking of multiple different clamps and automatic and stable positioning through the cooperation of the driving mechanism and the adjusting mechanism, thereby greatly reducing the operational burden of manual disassembly and assembly of the clamps, reducing the overall labor cost, and improving the overall processing efficiency of the workpiece.

[0018] 2. The present invention cooperates with the driving mechanism and the clamping mechanism to achieve the clamping mode of different clamps through a single driving source, thereby reducing the overall maintenance cost of the equipment, avoiding frequent disassembly and assembly of the clamps, and reducing the storage space required for idle clamps, thereby not only greatly reducing the risk of clamp damage, but also reducing the overall space cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a partial cross-sectional schematic diagram of some structures of the present invention.

[0021] Figure 3 for Figure 2 Enlarged schematic diagram at point A in the middle.

[0022] Figure 4 It is a partial cross-sectional schematic diagram of the driving mechanism and the adjusting mechanism.

[0023] Figure 5 Schematic diagram of the plate fixture structure.

[0024] Figure 6 It is a partial cross-sectional schematic diagram of the upper and lower clamp structures.

[0025] Figure 7 It is a schematic diagram of the local section of the centering fixture structure.

[0026] In the figure: 1, rotating table; 2, motor; 3, driving mechanism; 31, rotating cylinder; 32, driving component one; 321, multi-stage hydraulic cylinder; 322, first-stage piston rod; 323, second-stage piston rod; 324, push plate; 33, docking component; 331, positioning turntable; 332, docking slot one; 333, receiving slot; 34, positioning component; 341, spring rod; 342, sliding plate; 343, positioning plug rod; 344, connecting plate one; 4, adjusting mechanism; 41, docking frame; 42, adjusting component; 421, docking slot two; 422, connecting plate two; 423, elastic plug; 424, gear ring; 43, driving component two; 431, fixed seat; 432, pneumatic cylinder; 433, connecting plate three; 434, rack; 44, Installation components; 441, T-type slide column; 442, positioning plate; 443, positioning hole; 444, connecting plate four; 5, clamping mechanism; 51, plate clamp; 511, clamping table one; 512, debris groove; 513, baffle; 514, guide rail one; 515, slider one; 516, connecting plate five; 52, upper and lower clamps; 521, clamping table two; 522, guide rail two; 523, slider two; 524, wedge column; 525, pillar; 526, linear groove; 527, upper clamp plate; 528, lower clamp plate; 529, sliding shaft; 53, centering clamp; 531, clamping table three; 532, cross slide; 533, connecting plate six; 534, guide rail three; 535, slider three; 536, L-type clamp plate; 537, transmission plate. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1 and Figure 2 A convertible fixture for a CNC machine tool comprises a rotating table 1 and a motor 2 installed at the rear side of the rotating table 1, a driving mechanism 3 is arranged on the rotating table 1, an adjusting mechanism 4 is arranged at the front side of the driving mechanism 3, and a clamping mechanism 5 is arranged on the adjusting mechanism 4.

[0029] See also Figure 2 and Figure 4 The driving mechanism 3 includes a rotating cylinder 31 rotatably arranged on the rotating table 1 and fixedly connected to the driving end of the motor 2, a driving component 32 is arranged in the rotating cylinder 31, a docking component 33 is arranged at the front end of the rotating cylinder 31, and a positioning component 34 is arranged on the driving component 32 and the docking component 33.

[0030] See also Figure 2 and Figure 4 The driving assembly 32 includes a multi-stage hydraulic cylinder 321 fixedly arranged in the rotating cylinder 31, a primary piston rod 322 is installed in the multi-stage hydraulic cylinder 321, a secondary piston rod 323 is installed in the primary piston rod 322, and a push plate 324 that moves forward and backward is fixedly arranged at the telescopic end of the secondary piston rod 323.

[0031] See also Figure 2 and Figure 4 The docking assembly 33 includes a positioning turntable 331 fixedly arranged on the front side of the rotating cylinder 31, and a docking groove 332 with a through upper end is symmetrically opened on the front surface of the positioning turntable 331, wherein the cross-section of the docking groove 332 is T-shaped, and a receiving groove 333 is opened on the positioning turntable 331, which is through front and back and for the push plate 324 to slide through, wherein the receiving groove 333 is located between the two docking grooves 332.

[0032] See also Figure 2 and Figure 4The positioning assembly 34 includes a spring rod 341 symmetrically fixedly arranged on the rear side of the positioning turntable 331, and a sliding plate 342 is elastically slidably arranged on the symmetrical spring rod 341. The symmetrical sliding plates 342 correspond to the docking grooves 332 one by one, and a positioning rod 343 that slides forward and backward and penetrates the positioning turntable 331 and the corresponding docking groove 332 is symmetrically fixedly arranged on the front side of the sliding plate 342. A connecting plate 344 slidably connected to the primary piston rod 322 is fixedly arranged between the symmetrical sliding plates 342.

[0033] The multi-stage hydraulic cylinder 321 drives the internal primary piston rod 322 and secondary piston rod 323, and the primary piston rod 322 then extends forward from the multi-stage hydraulic cylinder 321 first, and pushes the connecting plate 1 344 through its front end to drive the two sliding plates 342 to move forward synchronously along the corresponding spring rod 341, and the sliding plate 342 then drives the corresponding two positioning rods 343 to move forward until the primary piston rod 322 extends forward a maximum distance, at which time the positioning rod 343 also moves forward a maximum distance and is inserted into the corresponding docking groove 1 332, and under the continuous drive of the multi-stage hydraulic cylinder 321, the secondary piston rod 323 then extends forward from the primary piston rod 322 again, and drives the push plate 324 at its front end to synchronously extend forward a certain distance from the receiving groove 333.

[0034] See also Figure 1 and Figure 2 The adjustment mechanism 4 includes a docking frame 41 which is rotatably arranged at the front end of the rotating cylinder 31 and the outer side of the positioning turntable 331. Three groups of adjustment components 42 and three groups of installation components 44 corresponding to the adjustment components 42 are evenly arranged circumferentially on the docking frame 41. A driving component 2 43 located at the lower side of the docking frame 41 is arranged on the front side of the rotating table 1. A gear ring 424 rotatably connected to the rotating cylinder 31 is fixedly arranged at the rear end of the docking frame 41.

[0035] See also Figure 1 , Figure 2 and Figure 3 The adjustment component 42 includes a second docking groove 421 symmetrically arranged on the front surface of the docking frame 41 and corresponding to the first docking groove 332 one by one, wherein the cross-section of the second docking groove 421 is the same as the cross-section of the first docking groove 332, and the end of the second docking groove 421 close to the positioning turntable 331 is through-set, and the rear side of the docking frame 41 is elastically slidably provided with a second connecting plate 422 corresponding to each group of symmetrical second docking grooves 421, and the front side of the second connecting plate 422 is symmetrically fixed with an elastic plug-in 423 that slides forward and backward and penetrates the docking frame 41 and the corresponding second docking groove 421.

[0036] See also Figure 2The driving component 2 43 includes a fixed seat 431 fixedly arranged on the front side of the rotating table 1, a pneumatic cylinder 432 is fixedly arranged on the left side of the fixed seat 431, a connecting plate 3 433 that moves left and right is fixedly arranged on the telescopic end of the pneumatic cylinder 432, and a rack 434 that meshes with the gear ring 424 is fixedly arranged on the upper end of the connecting plate 3 433.

[0037] The pneumatic cylinder 432 drives the connecting plate 3 433 and the rack 434 to move a certain distance in a specific direction, so that the rack 434 drives the docking frame 41 to rotate a certain angle in a specific direction through meshing transmission with the gear ring 424, until the paired docking grooves 421 in one group of adjustment components 42 on the docking frame 41 rotate synchronously to the top of the docking groove 1 332, and the lower ends of the paired docking grooves 421 of the group are respectively aligned with the upper ends of the corresponding docking grooves 1 332, so that the paired docking grooves 421 of the group are respectively connected to the corresponding docking grooves 1 332.

[0038] See also Figure 2 and Figure 3 The installation component 44 includes a T-shaped slide column 441 symmetrically and slidably arranged in the corresponding docking groove 421, and a positioning plate 442 is fixedly arranged on the front side of the symmetrical T-shaped slide column 441. A front-to-back through positioning hole 443 is opened on the T-shaped slide column 441 and the corresponding positioning plate 442. The positioning hole 443 on the positioning plate 442 away from the end of the positioning turntable 331 is plugged into the corresponding elastic plug-in 423. Four connecting plates 444 are symmetrically fixedly arranged between the symmetrical positioning plates 442, wherein the paired positioning plates 442 and the corresponding paired connecting plates 444 are vertically distributed and together form a circular frame.

[0039] When the return frame in one of the mounting assemblies 44 on the docking frame 41 is to be installed and positioned on the positioning turntable 331, the pneumatic cylinder 432 is first used to drive the docking frame 41 to rotate in a specific direction and adjust a specific angle until the paired docking grooves 421 corresponding to the return frame are respectively connected to the corresponding docking grooves 1 332, and then the connecting plate 2 422 corresponding to the return frame is pulled backward, and the connecting plate 2 422 drives the two elastic plug-ins 423 to move backward synchronously until the elastic plug-in 423 is pulled out of the corresponding positioning hole 443 on the return frame, and the return frame can then slide downward along the corresponding docking groove 2 421 to the docking groove 1 332 through the T-shaped sliding column 441. When the return frame moves to the lowermost end, all the positioning holes 443 on the return frame are aligned with the corresponding positioning rods 343 respectively, and the first-stage piston rod 322 drives all the positioning rods 343 to move forward the maximum distance synchronously through the multi-stage hydraulic cylinder 321, so that each positioning rod 343 is docked and inserted into the corresponding positioning hole 443 respectively, so that the return frame is stably positioned and installed on the positioning turntable 331. The above-mentioned operation method can quickly convert and dock multiple different return frames and the corresponding clamps installed thereon and automatically and stably position them, thereby greatly reducing the operational burden of manual disassembly and assembly of clamps, reducing the overall labor cost, and improving the overall processing efficiency of the workpiece.

[0040] See also Figure 1 The clamping mechanism 5 includes a plate clamp 51 installed on the upper mounting assembly 44 , an upper and lower clamp 52 installed on the left mounting assembly 44 , and a centering clamp 53 installed on the right mounting assembly 44 .

[0041] See also Figure 4 and Figure 5 The plate clamp 51 includes a clamping table 511 fixedly arranged on the front side of the upper return frame, a plurality of debris grooves 512 are evenly opened on the upper surface of the clamping table 511, a baffle 513 is fixedly arranged at the front end of the clamping table 511, a guide rail 514 is fixedly arranged symmetrically on the upper side of the clamping table 511 and located on the rear side of the baffle 513, a slider 515 is slidingly arranged on the guide rail 514, and a connecting plate 516 that cooperates with the push plate 324 for transmission is fixedly arranged between the left and right symmetrical sliders 515.

[0042] When the plate is to be clamped front and back, first slide the return frame with the plate clamp 51 installed on it to the positioning turntable 331, then drive the first-stage piston rod 322 to install and position the return frame through the multi-stage hydraulic cylinder 321, at this time, the connecting plate 516 is just aligned with the push plate 324, then place the plate on the guide rail 1 514 and make its front end stably fit with the baffle 513, and then continue to drive the second-stage piston rod 323 in the first-stage piston rod 322 to extend forward through the multi-stage hydraulic cylinder 321, and the second-stage piston rod 323 is extended forward. The rod 323 then drives the push plate 324 to extend forward from the receiving groove 333 until it fits with the connecting plate 516. Under the continuous drive of the multi-stage hydraulic cylinder 321, the push plate 324 then drives the two sliders 515 to move forward along the corresponding guide rail 514 by pushing the connecting plate 516 forward until the front ends of the two sliders 515 are stably and tightly fitted with the rear ends of the plates, thereby clamping the plates front and back on the clamping table 511, wherein the debris groove 512 can collect the debris generated by the plate processing.

[0043] See also Figure 6 The upper and lower clamps 52 include a clamping platform 521 fixedly arranged on the front side of the left return frame, a guide rail 522 is symmetrically fixedly arranged on the clamping platform 521, a slider 523 is slidably arranged on the guide rail 522, and a wedge column 524 that cooperates with the push plate 324 for transmission is fixedly arranged between the symmetrical sliders 523, wherein the front side of the wedge column 524 is an inclined surface, and two groups of pillars 525 are symmetrically fixedly arranged on the clamping platform 521 and located in front of the guide rail 522, each group consists of two pillars 525 symmetrically arranged in front and behind. A straight groove 526 is provided on the end of the column 525 close to the clamping platform 2 521, and an upper clamping plate 527 is fixedly provided on the ends of the four pillars 525 away from the clamping platform 2 521. A lower clamping plate 528 is slidably provided between the two symmetrical groups of pillars 525 and on the side of the upper clamping plate 527 close to the clamping platform 2 521, wherein the rear side of the lower clamping plate 528 is also an inclined surface and cooperates with the inclined surface on the front side of the wedge-shaped column 524 for transmission, and a sliding shaft 529 is fixedly provided on the lower clamping plate 528 which corresponds one-to-one to the pillars 525 and is slidably connected to the corresponding straight grooves 526.

[0044] When the rectangular workpiece is to be clamped up and down, the circular frame with the upper and lower clamps 52 is first installed and positioned on the positioning turntable 331. At this time, the wedge column 524 is just aligned with the push plate 324. Then the rectangular workpiece is stably placed on the lower clamping plate 528. Then, the multi-stage hydraulic cylinder 321 drives the secondary piston rod 323 to extend forward, and the secondary piston rod 323 drives the push plate 324 to move forward until it fits with the rear surface of the wedge column 524. Under the continuous drive of the multi-stage hydraulic cylinder 321, the push plate 324 continues to push the wedge column 524 forward, and the wedge column 524 and the slider 2 523 move forward along the guide rail 2 522. The lower clamping plate 528 and the sliding shaft 529 drive the rectangular workpiece to move upward along the straight groove 526 under the pressure of the inclined surface on the front side of the wedge column 524, until the lower clamping plate 528 and the upper clamping plate 527 cooperate to clamp the rectangular workpiece stably up and down.

[0045] See also Figure 7 The centering fixture 53 includes a clamping platform 3 531 fixedly arranged on the front side of the right return frame through a rod member 1, a cross slide 532 slidably connected to the rod member 1 is slidably arranged on the rear side of the clamping platform 3 531, wherein the cross slide 532 cooperates with the push plate 324 for transmission, four connecting plates 6 533 are evenly fixedly arranged on the cross slide 532, four guide rails 3 534 corresponding to the connecting plates 6 533 are evenly fixedly arranged on the front side of the clamping platform 3 531, a slider 3 535 is slidably arranged on the guide rail 3 534, an L-shaped clamping plate 536 is fixedly arranged on the front side of the slider 3 535, a transmission plate 537 is rotatably arranged on the side of the L-shaped clamping plate 536 away from the center of the clamping platform 3 531 through a support 1, and the rear end of the transmission plate 537 is rotatably connected to the corresponding connecting plate 6 533 through a support 2.

[0046] When a regular polygonal or circular workpiece is to be centered and clamped, the return frame with the centering fixture 53 is first installed and positioned on the positioning turntable 331. At this time, the cross slide 532 is aligned with the push plate 324. Then the workpiece is placed between the four L-shaped clamps 536. The push plate 324 is then driven forward by the multi-stage hydraulic cylinder 321 until it fits with the rear surface of the cross slide 532. Under the continuous drive of the multi-stage hydraulic cylinder 321, the push plate 324 continues to push the cross slide 532 forward along the rod 1. The cross slide 532 then makes the connecting plate 6 533 cooperate with the corresponding L-shaped clamp 536 through the transmission plate 537, thereby driving each L-shaped clamp 536 and the slider 3 535 to move along the corresponding guide rail 3 5 34 synchronously moves toward the center direction of the clamping table three 531 until the four L-shaped clamps 536 are synchronously, stably and tightly fitted on the surface of the workpiece, thereby stably clamping the workpiece, and at this time the rotating cylinder 31 can be driven to rotate by the motor 2, so that the positioning turntable 331 can drive the centering clamp 53 and the clamped workpiece to perform synchronous rotation processing. The above-mentioned operation method can realize the clamping of workpieces of corresponding shapes by driving different types of clamps respectively through a single multi-stage hydraulic cylinder 321, thereby reducing the overall maintenance cost of the equipment, avoiding frequent disassembly and assembly of various types of clamps, and reducing the storage space required for idle clamps, thereby not only greatly reducing the risk of clamp damage, but also reducing the overall space cost.

[0047] 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 convertible fixture for a CNC machine tool, comprising a rotating table (1) and a motor (2) mounted on the rear side of the rotating table (1), characterized in that: The rotating platform (1) is provided with a driving mechanism (3), an adjusting mechanism (4) is provided on the front side of the driving mechanism (3), and a clamping mechanism (5) is provided on the adjusting mechanism (4); The driving mechanism (3) comprises a rotating cylinder (31) rotatably arranged on the rotating platform (1) and fixedly connected to the driving end of the motor (2); a driving component 1 (32) is arranged in the rotating cylinder (31); a docking component (33) is arranged at the front end of the rotating cylinder (31); and a positioning component (34) is arranged on the driving component 1 (32) and the docking component (33); The adjustment mechanism (4) comprises a docking frame (41) rotatably arranged on the front end of the rotating cylinder (31) and the docking assembly (33); three groups of adjustment assemblies (42) and three groups of mounting assemblies (44) corresponding to the adjustment assemblies (42) are evenly arranged circumferentially on the docking frame (41); a second driving assembly (43) located at the lower side of the docking frame (41) is arranged on the front side of the rotating table (1); and a gear ring (424) rotatably connected to the rotating cylinder (31) is fixedly arranged on the rear end of the docking frame (41); The clamping mechanism (5) comprises a plate clamp (51) mounted on the upper mounting assembly (44), an upper and lower clamp (52) mounted on the left mounting assembly (44), and a centering clamp (53) mounted on the right mounting assembly (44); The driving assembly 1 (32) comprises a multi-stage hydraulic cylinder (321) fixedly arranged in the rotating cylinder (31), a primary piston rod (322) being installed in the multi-stage hydraulic cylinder (321), a secondary piston rod (323) being installed in the primary piston rod (322), and a push plate (324) that moves forward and backward being fixedly arranged at the telescopic end of the secondary piston rod (323); The docking assembly (33) comprises a positioning turntable (331) fixedly arranged on the front side of the rotating cylinder (31), a docking groove (332) with an upper end extending therethrough is symmetrically provided on the front surface of the positioning turntable (331), wherein the cross section of the docking groove (332) is T-shaped, and a receiving groove (333) extending frontward and rearward and for the push plate (324) to slide through is provided on the positioning turntable (331), wherein the receiving groove (333) is located between the two docking grooves (332); The adjustment assembly (42) comprises a second docking groove (421) symmetrically arranged on the front surface of the docking frame (41) and corresponding to the first docking groove (332) one by one, wherein the cross section of the second docking groove (421) is the same as the cross section of the first docking groove (332), and one end of the second docking groove (421) close to the positioning turntable (331) is through-set, and a connecting plate (422) corresponding to each group of symmetrical second docking grooves (421) is elastically slidably arranged on the rear side of the docking frame (41), and an elastic plug-in (423) is symmetrically fixedly arranged on the front side of the connecting plate (422) and slides forward and backward through the docking frame (41) and the corresponding second docking groove (421).

2. The convertible fixture for CNC machine tools according to claim 1, characterized in that: The positioning assembly (34) comprises a spring rod (341) symmetrically fixedly arranged on the rear side of the positioning turntable (331), and sliding plates (342) are elastically slidably arranged on the symmetrical spring rods (341). The symmetrical sliding plates (342) correspond to the docking grooves (332) one by one, respectively. A positioning rod (343) is symmetrically fixedly arranged on the front side of the sliding plate (342) and slides forward and backward to penetrate the positioning turntable (331) and the corresponding docking groove (332). A connecting plate (344) slidably connected to the primary piston rod (322) is fixedly arranged between the symmetrical sliding plates (342).

3. The convertible fixture for CNC machine tools according to claim 1, characterized in that: The driving assembly 2 (43) comprises a fixed seat (431) fixedly arranged on the front side of the rotating platform (1), a pneumatic cylinder (432) fixedly arranged on the left side of the fixed seat (431), a connecting plate 3 (433) movable leftward and rightward fixedly arranged on the telescopic end of the pneumatic cylinder (432), and a rack (434) meshingly connected to the gear ring (424) fixedly arranged on the upper end of the connecting plate 3 (433).

4. The convertible fixture for CNC machine tools according to claim 1, characterized in that: The installation assembly (44) includes a T-shaped slide column (441) symmetrically slidably arranged in the corresponding docking groove two (421), a positioning plate (442) is fixedly arranged on the front side of the symmetrical T-shaped slide column (441), and a front-to-back through positioning hole (443) is opened on the T-shaped slide column (441) and the corresponding positioning plate (442), and the positioning hole (443) on the positioning plate (442) away from the end of the positioning turntable (331) is plugged into the corresponding elastic plug-in (423), and a connecting plate four (444) is symmetrically fixedly arranged between the symmetrical positioning plates (442), wherein the paired positioning plates (442) and the corresponding paired connecting plates four (444) are vertically distributed and together form a circular frame.

5. The convertible fixture for CNC machine tools according to claim 2, characterized in that: The plate clamp (51) includes a clamping table (511) fixedly arranged on the front side of the upper return frame, a plurality of debris grooves (512) are evenly arranged on the upper surface of the clamping table (511) at the front and rear, a baffle (513) is fixedly arranged at the front end of the clamping table (511), a guide rail (514) is fixedly arranged on the upper side of the clamping table (511) and located behind the baffle (513) and symmetrically arranged on the left and right sides, a slider (515) is slidably arranged on the guide rail (514) at the front and rear sides, and a connecting plate (516) is fixedly arranged between the left and right symmetrical sliders (515) for transmission in cooperation with the push plate (324).

6. The convertible fixture for CNC machine tools according to claim 2, characterized in that: The upper and lower clamps (52) include a clamping table (521) fixedly arranged on the front side of the left return frame, a guide rail (522) is symmetrically fixedly arranged on the clamping table (521), a slider (523) is slidably arranged on the guide rail (522) for front and rear sliding, a wedge-shaped column (524) is fixedly arranged between the symmetrical sliders (523) for transmission in cooperation with the push plate (324), wherein the front side of the wedge-shaped column (524) is an inclined surface, and two groups of pillars (525) are symmetrically fixedly arranged on the clamping table (521) and located on the front side of the guide rail (522), each group consisting of two pillars (525) symmetrically arranged in front and rear. A straight groove (526) is provided on one end of the four pillars (525) close to the clamping platform two (521), an upper clamping plate (527) is fixedly provided on one end of the four pillars (525) away from the clamping platform two (521), and a lower clamping plate (528) is slidably provided between the two symmetrical groups of pillars (525) and located on the side of the upper clamping plate (527) close to the clamping platform two (521), wherein the rear side of the lower clamping plate (528) is also an inclined surface and cooperates with the inclined surface of the front side of the wedge-shaped column (524) for transmission, and a sliding shaft (529) corresponding to the pillars (525) and slidably connected to the corresponding straight grooves (526) is fixedly provided on the lower clamping plate (528).

7. The convertible fixture for CNC machine tools according to claim 2, characterized in that: The centering fixture (53) comprises a clamping platform three (531) fixedly arranged on the front side of the right return frame through a rod one, a cross slide (532) slidably connected to the rod one is slidably arranged on the rear side of the clamping platform three (531) forward and backward, wherein the cross slide (532) cooperates with the push plate (324) for transmission, four connecting plates six (533) are evenly fixedly arranged on the cross slide (532), four guide rails three (534) corresponding to the connecting plates six (533) are evenly fixedly arranged on the front side of the clamping platform three (531), a slider three (535) is slidably arranged on the guide rail three (534), an L-shaped clamping plate (536) is fixedly arranged on the front side of the slider three (535), a transmission plate (537) is rotatably arranged on the side of the L-shaped clamping plate (536) away from the center of the clamping platform three (531) through a support one, and the rear end of the transmission plate (537) is rotatably connected to the corresponding connecting plate six (533) through a support two.

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