A four-head turntable tooling fixture

Abstract

The present invention relates to the technical field of four-head turntables, and discloses a four-head turntable tooling fixture, which includes a lower workbench. A upper workbench is fixedly connected to the top of the lower workbench. A four-head turntable body is installed on the top of the upper workbench. A discharging mechanism for assisting in discharging debris is arranged on the inner wall of the lower workbench. A disc tailstock is slidably installed on the top of the upper workbench. An installation disc is fixedly connected to the right side of the disc tailstock. A motor is fixedly connected to the left side of the lower workbench. The output end of the motor is fixedly connected to a threaded rod. A slider is threadedly connected to the circumferential surface of the threaded rod. The present invention can clamp and process shorter shaft-like workpieces, and can also process longer shaft-like workpieces, improving the application range of the device. At the same time, it can prevent debris from accumulating on the upper workbench, thereby affecting the movement and adjustment of the disc tailstock, and preventing debris from causing harm to the maintenance staff of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of four-head turntables, and specifically to a four-head turntable tooling fixture. Background Art

[0002] The four-head turntable, also known as the four-axis turntable, is a device commonly used in machine tool processing, especially widely used in numerically controlled machine tools. Its function is to complete various machining operations by controlling the rotation of the disc and the tailstock, enabling the workpiece to be machined at multiple angles in multiple axial directions. This equipment can significantly improve machining accuracy and efficiency, especially suitable for multi-sided machining of complex workpieces.

[0003] The patent with the publication number CN215546958U discloses an integrated four-axis turntable tooling fixture, which relates to the field of tooling fixtures. It includes a tooling base plate. On both sides of the top of the tooling base plate, a disc tailstock and an L-shaped plate are respectively arranged. A T-slot bridge plate is arranged on the inner wall of the L-shaped plate. Multiple positioning seats are arranged on the top of the T-slot bridge plate. A workpiece is arranged inside the positioning seat. A first cylinder is installed on the top of the T-slot bridge plate opposite to the positioning seat. The overall structure of this patent is installed on the tooling base plate, and the whole tooling fixture can be disassembled and assembled by disassembling the tooling base plate. The integrated tooling fixture structure makes the overall stability higher and the use effect better. The T-slot bridge plate enables the tooling fixture to be applicable to the machining of different types of workpieces. When the type of workpiece changes, the positioning seat, the first cylinder and the second cylinder are replaced so that it can clamp the corresponding workpiece, and there is no need to use different types of tooling fixtures for machining, reducing the manufacturing cost. However, this device is difficult to clamp shaft workpieces of different lengths. The above device needs to disassemble the disc tailstock for position adjustment to clamp shaft workpieces of different lengths, and the operation is cumbersome. Therefore, a four-head turntable tooling fixture is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a four-head turntable tooling fixture for the deficiencies in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a four-head turntable tooling fixture, including a lower workbench, a top of the lower workbench is fixedly connected with an upper workbench, a top of the upper workbench is installed with a four-head turntable body, an inner wall of the lower workbench is provided with a discharging mechanism for assisting in discharging debris, a disk tailstock is slidably installed on a top of the upper workbench, a right side of the disk tailstock is fixedly connected with a mounting plate, a left side of the lower workbench is fixedly connected with a motor, an output end of the motor is fixedly connected with a threaded rod, a circumferential surface of the threaded rod is threadedly connected with a slider, both front and rear sides of the slider are fixedly connected with two connecting rods, an end of the connecting rod away from the slider is fixedly connected with a guiding block, an inner wall of the lower workbench is rotatably connected with a guiding rod, a right side of the slider is fixedly connected with a lower pushing plate, an inner wall of the lower pushing plate is provided with an anti-jamming mechanism for brushing debris on a surface of the threaded rod, a right side of the disk tailstock is fixedly connected with an upper pushing plate, a top of the upper pushing plate is provided with an adjusting mechanism for reducing circular runout of a shaft workpiece; a plurality of activity grooves are formed on a surface of the upper workbench, a circumferential surface of the threaded rod is rotatably connected with an inner wall of the lower workbench, a surface of the slider is slidably connected with an inner wall of the activity groove in the upper workbench, a bottom of the slider contacts with an inner wall of the lower workbench; a bottom and a top of the guiding block respectively contact with an inner wall of the lower workbench and a bottom of the upper workbench, a bottom of the lower pushing plate contacts with an inner wall of the lower workbench, an inner wall of the guiding block contacts with a circumferential surface of the guiding rod. Before installing a shaft workpiece, start the motor, the motor drives the threaded rod to rotate, the threaded rod drives the slider to move through the thread, but the slider is guided by the guiding block and the guiding rod, so the threaded rod can only drive the slider to move rightward through the thread, the slider drives the disk tailstock to move, at this time, the distance between the disk tailstock and the four-head turntable decreases, so that shorter shaft workpieces can be clamped and processed. When the threaded rod rotates reversely, it will drive the disk tailstock to move leftward and increase the distance between the disk tailstock and the four-head turntable, so that longer shaft workpieces can be processed. At the same time, after the equipment is used, an idle run will be carried out once, or an idle run can be carried out every time the equipment is started, so that the disk tailstock moves rightward, the disk tailstock drives the upper pushing plate to move, the upper pushing plate pushes the debris on the top of the upper workbench to move through the inclined block on the right side and guides it into the gap of the upper workbench, so that the processing debris can fall from the upper workbench into the lower workbench. At the same time, the slider will push the lower pushing plate to move, and the lower pushing plate will uniformly push the debris falling into the lower workbench out of the through hole on the right side of the lower workbench, so that it falls into the collection box below the processing machine tool, thereby preventing debris from accumulating on the upper workbench, which will affect the movement adjustment of the disk tailstock, and at the same time preventing debris from causing harm to the staff maintaining the equipment.

[0006] Preferably, the anti-jamming mechanism includes a housing. The inner walls of the housing are respectively rotatably connected with a lower friction wheel and an upper friction wheel, and the upper friction wheel is located above the lower friction wheel. One side of the upper friction wheel close to the threaded rod is fixedly connected with a turntable through a connecting rod, and several brush hairs are fixedly connected to the side of the turntable away from the upper friction wheel; the circumferential surface of the lower friction wheel is in contact with the circumferential surface of the upper friction wheel, the side of the turntable away from the brush hairs is in contact with the housing, the housing is fixedly connected to the inner wall of the lower push plate, the bottom of the housing is in contact with the inner wall of the lower workbench, and the circumferential surface of the lower friction wheel is in contact with the inner wall of the lower workbench. When the lower push plate moves, it will drive the housing to move, the housing drives the lower friction wheel to move, and during the movement of the lower friction wheel, it will contact the inner wall of the lower workbench, and the lower friction wheel will rotate itself through the friction wheel. The lower friction wheel drives the upper friction wheel in contact with it to rotate. The upper friction wheel drives the turntable to rotate through the connecting rod, and the turntable drives the brush hairs to rotate. The brush hairs can brush off the debris falling on the surface of the threaded rod, preventing the debris from entering between the slider and the threaded rod, thereby causing jamming between the threaded rod and the slider, so as to ensure the smooth movement of the slider on the circumferential surface of the threaded rod and improve the service life of the device.

[0007] Preferably, the discharging mechanism includes a guiding groove and a reset spiral groove. Both the guiding groove and the reset spiral groove are formed on the circumferential surface of the guiding rod, and the guiding groove is located on the left side of the reset spiral groove. The guiding groove is composed of two straight grooves and a non-self-locking spiral groove. The non-self-locking spiral groove is located between the two straight grooves, and the two straight grooves and the non-self-locking spiral groove are connected to each other. A sliding groove is formed on the inner wall of the lower workbench, and an inclined plate is slidably connected to the inner wall of the sliding groove. A connecting block is fixedly connected to the top of the inclined plate; the inner wall of the connecting block contacts the circumferential surface of the guiding rod. Clamping blocks are provided on the inner walls of both the connecting block and the guiding block. The clamping block in the connecting block is located in the reset spiral groove, and the clamping block in the guiding block is located in the guiding groove. When the slider moves to the right, it will drive the guiding block to move to the right together through the connecting rod. At this time, the clamping block on the inner wall of the guiding block will move in the straight groove on the surface of the guiding rod, and the guiding rod will not rotate at this time. When the clamping block moves to the non-self-locking spiral groove, since the guiding block itself does not rotate, the clamping block in the guiding block will drive the guiding rod to rotate through the non-self-locking spiral groove. When the guiding rod rotates, it will drive the reset spiral groove to rotate. The reset spiral groove drives the connecting block guided by the inclined plate to move to the left through the clamping block, so that the connecting block drives the inclined plate to move to the left. Then, the clamping block in the guiding block crosses the non-self-locking spiral groove and enters the straight groove on the right side of the guiding rod. At this time, the guiding rod stops rotating. When the guiding rod stops rotating, the reset spiral groove on the surface of the guiding rod also drives the inclined plate below the connecting block to the left side of the sliding groove on the right side of the inner wall of the lower workbench. At this time, when the guiding block and the slider continue to move to the right, they will drive the lower push plate to push the debris onto the inclined plate. When the guiding block moves leftward to reset, it will drive the guiding rod to rotate reversely through the non-self-locking spiral groove. At this time, the guiding rod will drive the inclined plate below the connecting block to move to the right through the reset spiral groove. The inclined plate will drive the debris to the discharging port on the right side of the lower workbench and let the debris slide out of the lower workbench through the inclined surface at its top to complete discharging. The inclined plate can completely remove the debris, improving the debris removal effect.

[0008] Preferably, the adjustment mechanism includes an elastic telescopic plate, a limiting rod, an arc-shaped block and a rolling ball. The elastic telescopic plate is fixedly connected to the top of the upper pushing plate. The limiting rods are fixedly connected to both sides of the telescopic end of the elastic telescopic plate. The arc-shaped block is fixedly connected to the top of the telescopic end of the elastic telescopic plate. The rolling ball is movably connected to the inner wall of the top of the arc-shaped block. A convex block is fixedly connected to the side of the upper friction wheel away from the turntable through a connecting rod. A sliding rod is slidably connected to the inner wall of the upper pushing plate. The top end of the sliding rod is fixedly connected to a limiting plate. A limiting spring is fixedly connected to the top of the upper pushing plate. A roller is rotatably connected to the inner wall of the bottom of the sliding rod. The circumferential surface of the roller contacts the surface of the convex block. The top of the limiting spring contacts the bottom of the limiting plate. The limiting rod is located on the movement track of the limiting plate. The surface of the sliding rod contacts the inner wall of the movable groove in the upper workbench. The convex block contacts the housing. When clamping a shaft workpiece, the workpiece can be placed on the rolling ball at the top of the arc-shaped block, and the elastic telescopic plate at the bottom of the arc-shaped block can expand and contract according to the thickness of the shaft workpiece. Therefore, it can play an auxiliary supporting role during workpiece clamping, making it more convenient to clamp the workpiece. When clamping a shaft workpiece on the four-head turntable, there is often a slight deviation in installation, which may lead to circular runout of the shaft workpiece. At this time, start the motor to drive the disc tailstock to move back and forth slightly, and at the same time, the four-head turntable drives the shaft workpiece to rotate slowly. When the disc tailstock moves, the upper friction wheel will also rotate. The upper friction wheel drives the convex block to rotate through the connecting rod. The convex block will lift the sliding rod, and the sliding rod drives the limiting plate to move upward. The limiting plate will move upward and hit the limiting rod. An external force is applied to the shaft workpiece through the limiting rod and the arc-shaped block to correct its circular runout. When the limiting rod is closer to the limiting plate, it means that the diameter of the shaft workpiece is larger. At this time, because the distance between the limiting plate and the limiting rod is shortened, the impact force of the limiting plate hitting the limiting rod is greater, ensuring that it can also correct the circular runout of large-diameter workpieces. The worker only needs to hold a circular runout detector to detect on the workpiece. When the circular runout is reduced to an appropriate value, stop the motor.

[0009] The present invention adopts the above technical solutions and can bring the following beneficial effects:

[0010] 1. For this four-head turntable fixture, before installing a shaft workpiece, start the motor. The motor drives the threaded rod to rotate. The threaded rod drives the slider to move through the thread. However, the slider is guided by the guide block and the guide rod. Therefore, the threaded rod can only drive the slider to move to the right through the thread. The slider drives the disc tailstock to move. At this time, the distance between the disc tailstock and the four-head turntable decreases, so that shorter shaft workpieces can be clamped and processed. When the threaded rod rotates in the reverse direction, it will drive the disc tailstock to move to the left and increase the distance between the disc tailstock and the four-head turntable, so that longer shaft workpieces can be processed. At the same time, it can also prevent debris from accumulating on the upper workbench, thereby affecting the movement adjustment of the disc tailstock, and also preventing debris from causing harm to the maintenance staff of the equipment.

[0011] 2. When the lower push plate moves, it drives the outer shell to move. The outer shell drives the lower friction wheel to move. During the movement of the lower friction wheel, it contacts the inner wall of the lower workbench and rotates itself through the friction wheel. The lower friction wheel drives the upper friction wheel in contact with it to rotate. The upper friction wheel drives the turntable to rotate through the connecting rod, and the turntable drives the brush to rotate. The brush can brush off the debris on the surface of the threaded rod, preventing the debris from entering between the slider and the threaded rod, thereby avoiding jamming between the threaded rod and the slider, and ensuring the smooth movement of the slider on the circumferential surface of the threaded rod, improving the service life of the device.

[0012] 3. Through the coordinated operation of the guide groove, the reset spiral groove, the inclined plate, the connecting block, and the sliding groove, the inclined plate drives the debris to the discharge port on the right side of the lower workbench, and through the inclined surface at its top, the debris slides out of the lower workbench to complete the discharge. The inclined plate can completely remove the debris, improving the debris removal effect.

[0013] 4. When clamping a shaft workpiece, the workpiece can be placed on the rolling balls at the top of the arc-shaped block, and the elastic telescopic plate at the bottom of the arc-shaped block can expand and contract according to the thickness of the shaft workpiece. Therefore, it can play an auxiliary supporting role during workpiece clamping, making workpiece clamping more convenient. The limiting plate moves upward and impacts the limiting rod, and an external force is applied to the shaft workpiece through the limiting rod and the arc-shaped block to correct its circular runout. When the limiting rod is closer to the limiting plate, it means the diameter of the shaft workpiece is larger. At this time, because the distance between the limiting plate and the limiting rod is shortened, the impact force of the limiting plate on the limiting rod is greater, ensuring that it can also correct the circular runout of large-diameter workpieces. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a half-sectional view of the structure of the lower workbench of the present invention;

[0016] Figure 3 It is a schematic diagram of the structure of the guide block of the present invention;

[0017] Figure 4 It is a half-sectional view of the structure of the outer shell of the present invention;

[0018] Figure 5 It is a schematic diagram of the structure of the guide rod of the present invention;

[0019] Figure 6 It is a schematic diagram of the structure of the elastic telescopic plate of the present invention;

[0020] Figure 7 Of the present invention Figure 6 Enlarged view of the structure at A in

[0021] In the figure: 1. Lower workbench; 2. Upper workbench; 3. Four-head turntable body; 4. Disc tailstock; 5. Mounting plate; 6. Motor; 7. Anti-jamming mechanism; 71. Housing; 72. Lower friction wheel; 73. Upper friction wheel; 74. Turntable; 75. Brush bristles; 8. Discharge mechanism; 81. Guide groove; 82. Reset spiral groove; 83. Inclined plate; 84. Connecting block; 85. Chute; 9. Adjustment mechanism; 91. Elastic telescopic plate; 92. Limit rod; 93. Arc-shaped block; 94. Ball; 95. Protrusion; 96. Slide rod; 97. Limit plate; 98. Limit spring; 99. Roller; 10. Threaded rod; 11. Slide block; 12. Connecting rod; 13. Guide block; 14. Guide rod; 15. Lower push plate; 16. Upper push plate. Detailed implementation mode

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 - 7, an embodiment of the present invention is: a four-head turntable tooling fixture, including a lower workbench 1, a top of the lower workbench 1 is fixedly connected with an upper workbench 2, a top of the upper workbench 2 is installed with a four-head turntable body 3, an inner wall of the lower workbench 1 is provided with a discharge mechanism 8 for assisting in discharging debris, a disk tailstock 4 is slidably installed on a top of the upper workbench 2, a right side of the disk tailstock 4 is fixedly connected with a mounting plate 5, a left side of the lower workbench 1 is fixedly connected with a motor 6, an output end of the motor 6 is fixedly connected with a threaded rod 10, a circumferential surface of the threaded rod 10 is threadedly connected with a slider 11, both front and rear sides of the slider 11 are fixedly connected with two connecting rods 12, an end of the connecting rod 12 away from the slider 11 is fixedly connected with a guide block 13, an inner wall of the lower workbench 1 is rotatably connected with a guide rod 14, a right side of the slider 11 is fixedly connected with a lower push plate 15, an inner wall of the lower push plate 15 is provided with an anti-jamming mechanism 7 for brushing debris on a surface of the threaded rod 10, a right side of the disk tailstock 4 is fixedly connected with an upper push plate 16, a top of the upper push plate 16 is provided with an adjustment mechanism 9 for reducing circular runout of a shaft workpiece. Before installing the shaft workpiece, start the motor 6, the motor 6 drives the threaded rod 10 to rotate, the threaded rod 10 drives the slider 11 to move through the thread, but the slider 11 is guided by the guide block 13 and the guide rod 14, so the threaded rod 10 can only drive the slider 11 to move to the right through the thread, the slider 11 drives the disk tailstock 4 to move, at this time the distance between the disk tailstock 4 and the four-head turntable decreases, so that shorter shaft workpieces can be clamped and processed. When the threaded rod 10 rotates in the reverse direction, it will drive the disk tailstock 4 to move to the left and increase the distance between the disk tailstock 4 and the four-head turntable, so that longer shaft workpieces can be processed; a plurality of movable grooves are formed on a surface of the upper workbench 2, a circumferential surface of the threaded rod 10 is rotatably connected with an inner wall of the lower workbench 1, a surface of the slider 11 is slidably connected with an inner wall of the movable groove in the upper workbench 2, a bottom of the slider 11 is in contact with an inner wall of the lower workbench 1; a bottom and a top of the guide block 13 are respectively in contact with an inner wall of the lower workbench 1 and a bottom of the upper workbench 2, a bottom of the lower push plate 15 is in contact with an inner wall of the lower workbench 1, an inner wall of the guide block 13 is in contact with a circumferential surface of the guide rod 14. After the equipment is used, it will run without load once, or it can also run without load once when the equipment is started each time, so that the disk tailstock 4 moves to the right, the disk tailstock 4 drives the upper push plate 16 to move, the upper push plate 16 pushes the debris on the top of the upper workbench 2 to move through the inclined block on the right side and guides it into the gap of the upper workbench 2, so that the processing debris can fall from the upper workbench 2 into the lower workbench 1. At the same time, the slider 11 will push the lower push plate 15 to move, and the lower push plate 15 will uniformly push the debris falling into the lower workbench 1 out of the through hole on the right side of the lower workbench 1, so that it falls into the collection box under the processing machine tool, thus preventing debris from accumulating on the upper workbench 2, which affects the movement adjustment of the disk tailstock 4, and at the same time preventing debris from causing harm to the maintenance staff of the equipment.

[0024] The anti-jamming mechanism 7 includes a housing 71. The inner walls of the housing 71 are respectively rotatably connected with a lower friction wheel 72 and an upper friction wheel 73, and the upper friction wheel 73 is located above the lower friction wheel 72. One side of the upper friction wheel 73 close to the threaded rod 10 is fixedly connected with a turntable 74 through a connecting rod. A plurality of bristles 75 are fixedly connected to the side of the turntable 74 away from the upper friction wheel 73. When the lower push plate 15 moves, it will drive the housing 71 to move. The housing 71 drives the lower friction wheel 72 to move. During the movement of the lower friction wheel 72, it will contact the inner wall of the lower workbench 1, and the lower friction wheel 72 will rotate itself through the friction wheel. The lower friction wheel 72 drives the upper friction wheel 73 in contact with it to rotate. The upper friction wheel 73 drives the turntable 74 to rotate through the connecting rod, and the turntable 74 drives the bristles 75 to rotate. The bristles 75 can brush off the debris on the surface of the threaded rod 10, preventing the debris from entering between the slider 11 and the threaded rod 10, thereby preventing jamming between the threaded rod 10 and the slider 11, and thus ensuring the smooth movement of the slider 11 on the circumferential surface of the threaded rod 10 and improving the service life of the device; the circumferential surface of the lower friction wheel 72 is in contact with the circumferential surface of the upper friction wheel 73. The side of the turntable 74 away from the bristles 75 is in contact with the housing 71. The housing 71 is fixedly connected to the inner wall of the lower push plate 15. The bottom of the housing 71 is in contact with the inner wall of the lower workbench 1. The circumferential surface of the lower friction wheel 72 is in contact with the inner wall of the lower workbench 1.

[0025] Working principle: Before installing the shaft workpiece, start the motor 6. The motor 6 drives the threaded rod 10 to rotate. The threaded rod 10 drives the slider 11 to rotate through the thread. However, the slider 11 is guided by the guide block 13 and the guide rod 14. Therefore, the threaded rod 10 can only drive the slider 11 to move to the right through the thread. The slider 11 drives the disk tailstock 4 to move. At this time, the distance between the disk tailstock 4 and the four-head turntable decreases, so that shorter shaft workpieces can be clamped and processed. When the threaded rod 10 rotates in the reverse direction, it will drive the disk tailstock 4 to move to the left and increase the distance between the disk tailstock 4 and the four-head turntable, so that longer shaft workpieces can be processed. At the same time, an idle run will be performed after the equipment is used, or an idle run can be performed each time the equipment is started, so that the disk tailstock 4 moves to the right. The disk tailstock 4 drives the upper push plate 16 to move. The upper push plate 16 pushes the debris on the top of the upper workbench 2 to move through the inclined block on the right side and guides it into the gap of the upper workbench 2, so that the processing debris can fall from the upper workbench 2 into the lower workbench 1. At the same time, the slider 11 will push the lower push plate 15 to move. The lower push plate 15 will uniformly push the debris falling into the lower workbench 1 out of the through hole on the right side of the lower workbench 1, so that it falls into the collection box below the processing machine tool, thereby preventing the debris from accumulating on the upper workbench 2, which will affect the movement adjustment of the disk tailstock 4, and at the same time preventing the debris from causing harm to the maintenance staff of the equipment;

[0026] When the push plate 15 moves, it will drive the outer shell 71 to move. The outer shell 71 drives the lower friction wheel 72 to move. During the movement of the lower friction wheel 72, it will contact the inner wall of the lower workbench 1, and the lower friction wheel 72 will rotate itself through the friction wheel. The lower friction wheel 72 drives the upper friction wheel 73 in contact with it to rotate. The upper friction wheel 73 drives the turntable 74 to rotate through the connecting rod, and the turntable 74 drives the brush bristles 75 to rotate. The brush bristles 75 can brush off the debris falling on the surface of the threaded rod 10, preventing the debris from entering between the slider 11 and the threaded rod 10, thereby causing jamming between the threaded rod 10 and the slider 11. Thus, it can ensure the smooth movement of the slider 11 on the circumferential surface of the threaded rod 10 and improve the service life of the device.

[0027] Please refer to Figures 1 - 7, on the basis of the above embodiments, in another embodiment of the present invention, the discharging mechanism 8 includes a guiding groove 81 and a reset spiral groove 82. Both the guiding groove 81 and the reset spiral groove 82 are formed on the circumferential surface of the guiding rod 14, and the guiding groove 81 is located on the left side of the reset spiral groove 82. The guiding groove 81 is composed of two straight grooves and a non-self-locking spiral groove. The non-self-locking spiral groove is located between the two straight grooves, and the two straight grooves and the non-self-locking spiral groove are connected to each other. A sliding groove 85 is formed on the inner wall of the lower workbench 1, and an inclined plate 83 is slidably connected to the inner wall of the sliding groove 85. A connecting block 84 is fixedly connected to the top of the inclined plate 83; the inner wall of the connecting block 84 contacts the circumferential surface of the guiding rod 14. Clamping blocks are provided on the inner walls of both the connecting block 84 and the guiding block 13. The clamping block in the connecting block 84 is located in the reset spiral groove 82, and the clamping block in the guiding block 13 is located in the guiding groove 81. When the slider 11 moves to the right, it will drive the guiding block 13 to move to the right together through the connecting rod 12. At this time, the clamping block on the inner wall of the guiding block 13 will move in the straight groove on the surface of the guiding rod 14, and at this time, the guiding rod 14 will not rotate. When the clamping block moves to the non-self-locking spiral groove, since the guiding block 13 itself will not rotate, the clamping block in the guiding block 13 will drive the guiding rod 14 to rotate through the non-self-locking spiral groove. When the guiding rod 14 rotates, it will drive the reset spiral groove 82 to rotate. The reset spiral groove 82 drives the connecting block 84 guided by the inclined plate 83 to move to the left through the clamping block, so that the connecting block 84 drives the inclined plate 83 to move to the left. Then, the clamping block in the guiding block 13 crosses the non-self-locking spiral groove and enters the straight groove on the right side of the guiding rod 14. At this time, the guiding rod 14 stops rotating. When the guiding rod 14 stops rotating, the reset spiral groove 82 on the surface of the guiding rod 14 also drives the inclined plate 83 below the connecting block 84 to the left side of the sliding groove 85 on the right side of the inner wall of the lower workbench 1. At this time, when the guiding block 13 and the slider 11 continue to move to the right, they will drive the lower push plate 15 to push the debris onto the inclined plate 83. When the guiding block 13 moves leftward to reset, it will drive the guiding rod 14 to rotate in the reverse direction through the non-self-locking spiral groove. At this time, the guiding rod 14 will drive the inclined plate 83 below the connecting block 84 to move to the right through the reset spiral groove 82. The inclined plate 83 will drive the debris to the discharging port on the right side of the lower workbench 1 and, through the inclined surface at its top, let the debris slide out of the lower workbench 1 to complete discharging. All the debris can be removed through the inclined plate 83, improving the debris removal effect.

[0028] The adjusting mechanism 9 includes an elastic telescopic plate 91, a limiting rod 92, an arc-shaped block 93 and a rolling ball 94. The elastic telescopic plate 91 is fixedly connected to the top of the upper pushing plate 16. The limiting rods 92 are fixedly connected to both sides of the telescopic end of the elastic telescopic plate 91. The arc-shaped block 93 is fixedly connected to the top of the telescopic end of the elastic telescopic plate 91. The rolling ball 94 is movably connected to the inner wall of the top of the arc-shaped block 93. When clamping a shaft workpiece, the workpiece can be placed on the rolling ball 94 at the top of the arc-shaped block 93, and the elastic telescopic plate 91 at the bottom of the arc-shaped block 93 can be telescoped according to the thickness of the shaft workpiece. Therefore, it can play an auxiliary supporting role during workpiece clamping and make workpiece clamping more convenient. A convex block 95 is fixedly connected to the side of the upper friction wheel 73 away from the turntable 74 through a connecting rod. A sliding rod 96 is slidably connected to the inner wall of the upper pushing plate 16. The top end of the sliding rod 96 is fixedly connected to a limiting plate 97. A limiting spring 98 is fixedly connected to the top of the upper pushing plate 16. The limiting spring 98 can buffer the sliding rod 96 every time it drops. A roller 99 is rotatably connected to the inner wall of the bottom of the sliding rod 96. The circumferential surface of the roller 99 contacts the surface of the convex block 95. The top of the limiting spring 98 contacts the bottom of the limiting plate 97. The limiting rod 92 is located on the movement track of the limiting plate 97. The surface of the sliding rod 96 contacts the inner wall of the moving groove in the upper workbench 2. The convex block 95 contacts the housing 71. When clamping a shaft workpiece on the four-spindle turntable, slight installation deviation often occurs, which will cause circular runout of the shaft workpiece. At this time, start the motor 6 to drive the disk tailstock 4 to reciprocate slightly back and forth. At the same time, the four-spindle turntable drives the shaft workpiece to rotate slowly. When the disk tailstock 4 moves, the upper friction wheel 73 will also rotate. The upper friction wheel 73 drives the convex block 95 to rotate through the connecting rod. The convex block 95 will lift the sliding rod 96. The sliding rod 96 drives the limiting plate 97 to move upward. The limiting plate 97 will move upward and impact the limiting rod 92. An external force is applied to the shaft workpiece through the limiting rod 92 and the arc-shaped block 93 to correct its circular runout. When the limiting rod 92 is closer to the limiting plate 97, it means the diameter of the shaft workpiece is larger. At this time, because the distance between the limiting plate 97 and the limiting rod 92 is shortened, the impact force of the limiting plate 97 on the limiting rod 92 is greater, ensuring that it can also play a role in correcting the circular runout of large-diameter workpieces. The worker only needs to hold a circular runout detector to detect on the workpiece. When the circular runout is reduced to an appropriate value, stop the motor 6.

[0029] Working principle: When the slider 11 moves rightward, it will drive the guide block 13 to move rightward together through the connecting rod 12. At this time, the clamping block on the inner wall of the guide block 13 will move in the straight groove on the surface of the guide rod 14, and at this time, the guide rod 14 will not rotate. When the clamping block moves to the non-self-locking spiral groove, since the guide block 13 itself does not rotate, the clamping block in the guide block 13 will drive the guide rod 14 to rotate through the non-self-locking spiral groove. When the guide rod 14 rotates, it will drive the reset spiral groove 82 to rotate. The reset spiral groove 82 drives the connecting block 84 guided by the inclined plate 83 to move leftward through the clamping block, so that the connecting block 84 drives the inclined plate 83 to move leftward. Then, the clamping block in the guide block 13 crosses the non-self-locking spiral groove and enters the straight groove on the right side of the guide rod 14. At this time, the guide rod 14 stops rotating. When the guide rod 14 stops rotating, the reset spiral groove 82 on the surface of the guide rod 14 also drives the inclined plate 83 below the connecting block 84 to the left side of the chute 85 on the inner wall of the right side of the lower workbench 1. At this time, when the guide block 13 and the slider 11 continue to move rightward, it will drive the lower push plate 15 to push the debris onto the inclined plate 83. When the guide block 13 moves leftward and resets, it will drive the guide rod 14 to rotate in the reverse direction through the non-self-locking spiral groove. At this time, the guide rod 14 will drive the inclined plate 83 below the connecting block 84 to move rightward through the reset spiral groove 82. The inclined plate 83 will drive the debris to the discharge port on the right side of the lower workbench 1 and, through the inclined surface at its top, let the debris slide out of the lower workbench 1 to complete the discharging. Through the inclined plate 83, all the debris can be removed, improving the debris removal effect;

[0030] When clamping a shaft workpiece, the workpiece can be placed on the rolling balls 94 on the top of the arc block 93, and the elastic telescopic plate 91 at the bottom of the arc block 93 can be telescoped according to the thickness of the shaft workpiece. Therefore, it can play an auxiliary supporting role during workpiece clamping, making it more convenient to clamp the workpiece. When the shaft workpiece is clamped on the four-head turntable, there is often a slight deviation in installation, which may lead to circular runout of the shaft workpiece. At this time, start the motor 6 to drive the disk tailstock 4 to move back and forth slightly in the front and rear directions, and at the same time, the four-head turntable drives the shaft workpiece to rotate slowly. When the disk tailstock 4 moves, the upper friction wheel 73 will also rotate. The upper friction wheel 73 drives the convex block 95 to rotate through the connecting rod. The convex block 95 will lift the slide bar 96, and the slide bar 96 drives the limit plate 97 to move upward. The limit plate 97 will move upward and impact the limit rod 92. An external force is applied to the shaft workpiece through the limit rod 92 and the arc block 93 to correct its circular runout. When the limit rod 92 is closer to the limit plate 97, it means that the diameter of the shaft workpiece is larger. At this time, because the distance between the limit plate 97 and the limit rod 92 is shortened, the impact force of the limit plate 97 on the limit rod 92 is greater, ensuring that it can also correct the circular runout of large-diameter workpieces. Workers only need to hold the circular runout detector and detect it on the workpiece. When the circular runout is reduced to an appropriate value, stop the motor 6.

[0031] The present invention provides a four-head turntable tooling fixture. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented by using the prior art.

Claims

1. A four-head turntable fixture, comprising a lower worktable (1), characterized in that: The top of the lower workbench (1) is fixedly connected to the upper workbench (2), the top of the upper workbench (2) is installed with a four-head turntable body (3), the inner wall of the lower workbench (1) is provided with a discharge mechanism (8) for assisting the discharge of debris, the top of the upper workbench (2) is slidably installed with a disc tailstock (4), the right side of the disc tailstock (4) is fixedly connected to a mounting plate (5), the left side of the lower workbench (1) is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to a threaded rod (10), the circumferential surface of the threaded rod (10) is threadedly connected to a slider (11), and the slider Two connecting rods (12) are fixedly connected to the front and rear sides of the slider (11), and one end of the connecting rod (12) away from the slider (11) is fixedly connected to a guide block (13). The inner wall of the lower workbench (1) is rotatably connected to a guide rod (14). The right side of the slider (11) is fixedly connected to a lower push plate (15), and the inner wall of the lower push plate (15) is provided with an anti-jamming mechanism (7) for brushing off debris on the surface of the threaded rod (10). The right side of the disc tailstock (4) is fixedly connected to an upper push plate (16), and the top of the upper push plate (16) is provided with an adjustment mechanism (9) for reducing the circular runout of the shaft workpiece; The anti-jamming mechanism (7) comprises a housing (71), the inner wall of the housing (71) being rotatably connected to a lower friction wheel (72) and an upper friction wheel (73), the upper friction wheel (73) being located above the lower friction wheel (72), a side of the upper friction wheel (73) close to the threaded rod (10) being fixedly connected to a rotating disk (74) via a connecting rod, and a side of the rotating disk (74) away from the upper friction wheel (73) being fixedly connected to a plurality of bristles (75); The circumferential surface of the lower friction wheel (72) contacts the circumferential surface of the upper friction wheel (73); the side of the turntable (74) away from the bristles (75) contacts the outer shell (71); the outer shell (71) is fixedly connected to the inner wall of the lower push plate (15); the bottom of the outer shell (71) contacts the inner wall of the lower workbench (1); and the circumferential surface of the lower friction wheel (72) contacts the inner wall of the lower workbench (1); The adjustment mechanism (9) comprises an elastic telescopic plate (91), a limiting rod (92), an arc block (93) and a rolling ball (94); the elastic telescopic plate (91) is fixedly connected to the top of the upper push plate (16); the limiting rod (92) is fixedly connected to both sides of the telescopic end of the elastic telescopic plate (91); the arc block (93) is fixedly connected to the top of the telescopic end of the elastic telescopic plate (91); and the rolling ball (94) is movably connected to the inner wall of the top of the arc block (93); The side of the upper friction wheel (73) away from the rotating disk (74) is fixedly connected to a protrusion (95) via a connecting rod, the inner wall of the upper push plate (16) is slidably connected to a slide rod (96), the top of the slide rod (96) is fixedly connected to a limit plate (97), the top of the upper push plate (16) is fixedly connected to a limit spring (98), and the inner wall of the bottom of the slide rod (96) is rotatably connected to a roller (99); The circumferential surface of the roller (99) contacts the surface of the protrusion (95), the top of the limit spring (98) contacts the bottom of the limit plate (97), the limit rod (92) is located on the movement track of the limit plate (97), the surface of the slide rod (96) contacts the inner wall of the movable groove in the upper workbench (2), and the protrusion (95) contacts the housing (71).

2. A four-head turntable fixture according to claim 1, characterized in that: The surface of the upper workbench (2) is provided with a plurality of movable grooves, the circumferential surface of the threaded rod (10) is rotatably connected to the inner wall of the lower workbench (1), the surface of the slider (11) is slidably connected to the inner wall of the movable groove in the upper workbench (2), and the bottom of the slider (11) is in contact with the inner wall of the lower workbench (1).

3. A four-head turntable fixture according to claim 2, characterized in that: The bottom and top of the guide block (13) are in contact with the inner wall of the lower workbench (1) and the bottom of the upper workbench (2) respectively, the bottom of the lower push plate (15) is in contact with the inner wall of the lower workbench (1), and the inner wall of the guide block (13) is in contact with the circumferential surface of the guide rod (14).

4. A four-head turntable fixture according to claim 3, characterized in that: The discharging mechanism (8) comprises a guide groove (81) and a reset spiral groove (82). The guide groove (81) and the reset spiral groove (82) are both formed on the circumferential surface of the guide rod (14), and the guide groove (81) is located on the left side of the reset spiral groove (82). The guide groove (81) consists of two straight grooves and a non-self-locking spiral groove. The non-self-locking spiral groove is located between the two straight grooves, and the two straight grooves and the non-self-locking spiral groove are connected to each other. The inner wall of the lower workbench (1) is provided with a slide groove (85), and the inner wall of the slide groove (85) is slidably connected to an inclined plate (83), and the top of the inclined plate (83) is fixedly connected to a connecting block (84).

5. The four-head turntable fixture according to claim 4 is characterized in that: The inner wall of the connecting block (84) contacts the circumferential surface of the guide rod (14), and the inner walls of the connecting block (84) and the guide block (13) are both provided with a clamping block, and the clamping block in the connecting block (84) is located in the reset spiral groove (82), and the clamping block in the guide block (13) is located in the guide groove (81).

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