Numerical control machine tool for producing tapered roller bearing

Abstract

The application relates to the technical field of bearing machining, in particular to a numerical control machine tool for producing tapered roller bearings, which comprises a tool base plate, clamping tools, a switching mechanism and a suction assembly. A main shaft and a first rotary driver are arranged below the tool base plate. The clamping tools are multiple, and the specifications of the multiple clamping tools are different. The switching mechanism comprises multiple jacking units and multiple clamping units. The multiple jacking units are arranged circumferentially around the main shaft, and the jacking units selectively jack a target clamping tool to a machining station. The multiple clamping units are arranged circumferentially around the main shaft, and the clamping units are used for driving the clamping tools to move radially. The suction assembly is used for sucking chips generated in the machining process. The tool base plate, the multiple clamping tools and the switching mechanism are arranged, so that the clamping and machining of the inner and outer rings of the tapered roller bearing can be completed on the same numerical control machine tool.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, specifically to a CNC machine tool for the production of tapered roller bearings. Background Technology

[0002] Tapered roller bearing rings are divided into inner rings and outer rings. The clamping surface structures of the two are different. The inner ring relies on the inner hole to achieve internal expansion clamping, while the outer ring relies on the outer circle to achieve external clamping.

[0003] Patent application CN202610908006.1 discloses an integrated CNC machining device that uses the centrifugal force generated by the spindle rotation to drive the jaws to open radially outward. The jaws then tighten the inner hole of the inner ring of the bearing, thereby completing the centering and clamping of the inner ring of the tapered roller bearing. This device can achieve reliable clamping of the inner ring at high speeds and improves the clamping efficiency of inner ring machining to a certain extent.

[0004] In the above scheme, the chuck's jaws can only perform radial outward tensioning action, and can only clamp the inner ring of a tapered roller bearing with an inner hole. It cannot complete the outer circle clamping operation of the outer ring of a tapered roller bearing. Summary of the Invention

[0005] To address the aforementioned issues, a CNC machine tool for producing tapered roller bearings is provided. By setting up a tooling base plate, multiple clamping fixtures, and a switching mechanism, the clamping and machining operations of the inner and outer rings of tapered roller bearings can be completed on the same CNC machine tool.

[0006] To address the problems of existing technologies, this invention provides a CNC machine tool for producing tapered roller bearings, comprising a tooling base plate, a clamping fixture, a switching mechanism, and a suction assembly. A spindle and a first rotary driver for driving the spindle to rotate are disposed below the tooling base plate. Multiple clamping fixtures of different specifications are provided, and they are coaxially arranged about the axis of the spindle. Each clamping fixture includes multiple jaws capable of radial sliding. The switching mechanism includes a lifting unit and multiple clamping units. The lifting unit is coaxially arranged with the spindle and selects one target clamping fixture to the machining station. The multiple clamping units are arranged circumferentially around the spindle and are used to drive the clamping fixture to move radially. The suction assembly is used to suction chips generated during the machining process.

[0007] Preferably, the clamping fixture further includes a fixture base plate, which is coaxially arranged with the main shaft; a plurality of jaws are evenly distributed on the fixture base plate, and a connecting rod is provided at the lower end of each jaw, and a transmission block that docks with the clamping unit is provided at the lower end of the connecting rod.

[0008] Preferably, the clamping fixture further includes a guide transmission rod, one end of which is fixedly connected to the fixture base plate, and the other end passes downward through the fixture base plate and is connected to the lifting unit. The guide transmission rod and the through hole of the fixture base plate form a circumferential transmission fit through a keyway structure, which is used to transmit the rotational torque of the fixture base plate to the clamping fixture. A second return spring that provides downward preload is sleeved on the guide transmission rod.

[0009] Preferably, the tooling base plate has a groove facing its center, and the chuck is provided with a slider, which is slidably disposed in the groove.

[0010] Preferably, a first return spring is also sleeved on the connecting rod, the first return spring being used to provide a downward thrust to the connecting rod.

[0011] Preferably, the lifting unit is fixedly disposed below the tooling base plate, and the lifting unit includes a lifting block and a lifting drive structure; the lifting block includes a base cylinder and a plurality of protrusions, the plurality of protrusions being spirally disposed on the base cylinder; the lifting drive structure is used to drive the base cylinder to rotate.

[0012] Preferably, the clamping unit is fixedly disposed below the tooling base plate, and the clamping unit includes a clamping drive block and a linear drive structure; the clamping drive block is used to dock with the clamping tooling and drive the jaws of the clamping tooling to move radially; the linear drive structure drives the clamping drive block to move radially along the main shaft, wherein the fixed end of the linear drive structure is installed below the tooling base plate, and the output end is connected to the clamping drive block.

[0013] Preferably, the clamping drive block has multiple slots spaced at equal intervals.

[0014] Preferably, the clamping unit further includes a limiting sliding structure, which constrains the movement direction of the clamping drive block.

[0015] Preferably, the main shaft is configured as a hollow structure; the suction assembly includes a negative pressure air duct, and the air inlet end of the negative pressure air duct is arranged towards the tooling base plate.

[0016] The advantages of this invention compared to the prior art are: 1. This invention includes a tooling base plate, multiple clamping fixtures, a switching mechanism, and a suction assembly. When the CNC machine tool is working, it selects the corresponding clamping fixture according to the type of workpiece to be processed. The lifting unit in the switching mechanism applies an upward thrust to the selected clamping fixture, lifting the clamping fixture of the target specification to the processing position, while the remaining clamping fixtures remain in a low position. After the tapered roller bearing race is placed in place, the clamping unit of the switching mechanism is activated, driving the lifted clamping fixture to move radially to clamp the race. The first rotary driver drives the spindle to drive the tooling base plate, clamping fixtures, and race to rotate synchronously for cutting. The suction assembly continuously suctions the chips, thereby realizing the clamping and processing of the inner and outer races of the tapered roller bearing on the same CNC machine tool.

[0017] 2. This invention features a tooling base plate and multiple jaws. The lifting unit lifts the selected clamping fixture to the machining station. The transmission block of the clamping fixture moves upward synchronously with the connecting rod, completing the docking of the transmission block with the clamping unit. The tooling base plate maintains a coaxial position with the spindle. After the tapered roller bearing ring is placed in place, the clamping unit starts and outputs power. The power is transmitted sequentially through the transmission block and the connecting rod to the multiple jaws evenly arranged on the tooling base plate, thereby realizing the transmission of power from the clamping unit to the jaws of the selected clamping fixture.

[0018] 3. This invention features a guide transmission rod and a second return spring. The lifting unit applies an upward thrust to the selected clamping fixture. This thrust acts on the guide transmission rod, which drives the fixture base plate, connecting rod, and jaws to move upward to the machining position, overcoming the downward preload of the second return spring. The remaining clamping fixtures remain in a low position. After machining is completed, the lifting unit removes the upward thrust, the second return spring releases its preload, and the guide transmission rod drives the fixture base plate downward. The guide transmission rod penetrates the fixture base plate to limit the radial offset of the fixture base plate, thereby providing axial guidance for the lifting and lowering of the clamping fixture and achieving automatic return and reset of the clamping fixture after machining. Attached Figure Description

[0019] Figure 1 This is a three-dimensional sectional view of a CNC machine tool for producing tapered roller bearings according to the present invention.

[0020] Figure 2 This is a perspective view of a tooling base plate, spindle, first rotary drive, lifting unit, and clamping unit in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0021] Figure 3 This is a perspective view of a clamping fixture used in a CNC machine tool for the production of tapered roller bearings according to the present invention.

[0022] Figure 4This is a perspective view of a tooling base plate, jaws, connecting rod, transmission block, first return spring, guide transmission rod, and second return spring in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0023] Figure 5 This is a perspective view of the tooling base plate, chuck, and slide block in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0024] Figure 6 This is a perspective view of a guide transmission rod, lifting block, and lifting drive structure in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0025] Figure 7 This is a perspective view of a lifting block and lifting drive structure in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0026] Figure 8 This is a perspective view of the tooling base, clamping drive block, linear drive structure, and limiting sliding structure in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0027] Figure 9 This is a perspective view of the jaws, connecting rod, transmission block, and clamping drive block in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0028] Figure 10 This is a perspective view of a clamping drive block, linear drive structure, and limiting sliding structure in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0029] Figure 11 This is a perspective view of a tooling base plate and negative pressure air duct in a CNC machine tool for producing tapered roller bearings according to the present invention.

[0030] The following are the labels in the diagram: 1. Tooling base plate; 11. Spindle; 12. First rotary actuator; 2. Clamping fixture; 21. Tooling base plate; 211. Slide groove; 22. Claw; 221. Connecting rod; 222. Transmission block; 223. Slider; 224. First return spring; 23. Guide transmission rod; 24. Second return spring; 3. Switching mechanism; 31. Lifting unit; 311. Lifting block; 3111. Base cylinder; 3112, Protrusion; 312, Lifting drive structure; 3121, Second rotary actuator; 3122, Gear transmission group; 32, Clamping unit; 321, Clamping drive block; 3211, Slot; 322, Linear drive structure; 3221, Linear actuator; 3222, Transmission connecting plate; 323, Limiting sliding structure; 3231, Slide rail; 3232, Slide bar; 4, Suction assembly; 41, Negative pressure air duct. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1 to 11 As shown: A CNC machine tool for producing tapered roller bearings includes a tooling base plate 1, a clamping fixture 2, a switching mechanism 3, and a suction assembly 4. A spindle 11 and a first rotary driver 12 for driving the spindle 11 to rotate are disposed below the tooling base plate 1. Multiple clamping fixtures 2 are provided, and the multiple clamping fixtures 2 have different specifications. The multiple clamping fixtures 2 are coaxially arranged about the axis of the spindle 11, and each clamping fixture 2 includes multiple jaws 22 capable of radial sliding. The switching mechanism 3 includes a lifting unit 31 and multiple clamping units 32. The lifting unit 31 is coaxially arranged with the spindle 11. The lifting unit 31 selectively lifts a target clamping fixture 2 to the machining station. The multiple clamping units 32 are arranged circumferentially around the spindle 11, and the clamping units 32 are used to drive the clamping fixture 2 to move radially. The suction assembly 4 is used to suction chips generated during the machining process.

[0033] During operation, this CNC machine tool selects the corresponding clamping fixture 2 according to the type of workpiece to be processed. The lifting unit 31 applies an upward thrust to the selected clamping fixture 2, lifting the clamping fixture 2 of the target specification to the processing position, while the other clamping fixtures 2 remain in a low position. After the tapered roller bearing race is placed in place, the corresponding clamping unit 32 is activated, driving the already lifted clamping fixture 2 to move radially. When machining the inner tapered roller race, the inner expansion clamping fixture 2 is selected. The clamping unit 32 outputs a radially outward driving force to open the jaws 22 of the clamping fixture 2. The clamping surface of the jaws 22 of the inner expansion clamping fixture 2 faces radially outward, clamping the inner hole of the inner tapered roller race. When machining the outer tapered roller race, the outer clamping fixture 2 is selected. The clamping unit 32 outputs a radially inward driving force to close the jaws 22 of the clamping fixture 2. The clamping surface of the jaws 22 of the outer clamping fixture 2 faces radially inward. The jaws 22 of the clamping fixture 2 are arranged at a larger radial position, clamping the outer circle of the outer tapered roller race. The first rotary drive 12 drives the spindle 11, which drives the tooling base plate 1, the clamping tool 2 and the tapered roller bearing ring to rotate synchronously for cutting. The chips generated during the machining process are continuously sucked out by the suction component 4, reducing the interference of chip retention on the machining process, thereby realizing the clamping and machining of the inner and outer rings of the tapered roller bearing on the same CNC machine tool.

[0034] Reference Figure 3 and Figure 4As shown: The clamping fixture 2 also includes a fixture base plate 21, which is coaxially arranged with the main shaft 11; a plurality of jaws 22 are evenly distributed on the fixture base plate 21, and a connecting rod 221 is provided at the lower end of the jaws 22. A transmission block 222 that docks with the clamping unit 32 is provided at the lower end of the connecting rod 221.

[0035] The lifting unit 31 lifts the selected clamping fixture 2 upwards to the machining station. The transmission block 222 of the clamping fixture 2 moves upwards synchronously with the connecting rod 221, completing the docking of the transmission block 222 with the clamping unit 32. The fixture base plate 21 maintains a coaxial position with the spindle 11. After the tapered roller bearing ring is placed in place, the clamping unit 32 starts and outputs power. The power is transmitted sequentially through the transmission block 222 and the connecting rod 221 to multiple jaws 22 evenly arranged on the fixture base plate 21, causing the jaws 22 to move radially. When machining the inner tapered roller bearing ring, the jaws 22 expand radially outwards to clamp the inner hole of the inner tapered roller bearing ring. When machining the outer tapered roller bearing ring, the jaws 22 contract radially inwards to clamp the outer circle of the outer tapered roller bearing ring, so that the power of the clamping unit 32 is transmitted only to the selected clamping fixture 2.

[0036] Reference Figure 3 and Figure 4 As shown: The clamping fixture 2 also includes a guide transmission rod 23. One end of the guide transmission rod 23 is fixedly connected to the fixture base plate 21, and the other end passes downward through the fixture base plate 1 and is connected to the lifting unit 31. The guide transmission rod 23 and the through hole of the fixture base plate 1 form a circumferential transmission fit through a keyway structure, which is used to transmit the rotational torque of the fixture base plate 1 to the clamping fixture 2. A second return spring 24 is sleeved on the guide transmission rod 23 to provide downward preload.

[0037] The lifting unit 31 applies an upward thrust to the selected clamping fixture 2. This thrust acts on the guide transmission rod 23, which drives the fixture base plate 21, connecting rod 221, and chuck 22 to overcome the downward preload of the second return spring 24 and move upward to the machining position. The remaining clamping fixtures 2 remain in a low position. After the tapered roller bearing ring is placed in place, the clamping unit 32 is activated. Power is transmitted to the chuck 22 via the transmission block 222 and connecting rod 221, completing the clamping of the tapered roller bearing ring. After machining is completed, the lifting unit 31 removes the upward thrust, the second return spring 24 releases the preload, and the guide transmission rod 23 drives the fixture base plate 21 to fall downward as a whole. The guide transmission rod 23 penetrates the fixture base plate 1, limiting the radial offset of the fixture base plate 21, thereby providing axial guidance for the lifting and lowering movement of the clamping fixture 2 and realizing the automatic return and reset of the clamping fixture 2 after machining.

[0038] Reference Figure 5As shown: The tooling base plate 21 has a groove 211 facing its center, and the claw 22 is provided with a slider 223, which is slidably disposed in the groove 211.

[0039] After the tapered roller bearing race is placed in place, the clamping unit 32 is activated. Power is transmitted to the jaw 22 via the transmission block 222 and the connecting rod 221. The slider 223 on the jaw 22 forms a sliding fit with the groove 211 of the tooling base plate 21, which is oriented towards the center. The slider 223 slides radially along the groove 211. The groove 211 limits the movement trajectory of the slider 223, thereby constraining the jaw 22 to only perform radial movement and preventing the jaw 22 from deflecting during operation.

[0040] Reference Figure 4 As shown: A first return spring 224 is also sleeved on the connecting rod 221. The first return spring 224 is used to provide a downward thrust on the connecting rod 221.

[0041] The lifting unit 31 lifts the target clamping fixture 2 upwards to the machining station. The transmission block 222 at the lower end of the connecting rod 221 moves upwards and docks with the clamping unit 32. The first return spring 224, sleeved on the connecting rod 221, continuously applies a downward pushing force to the connecting rod 221. After the tapered roller bearing ring is placed in place, the clamping unit 32 outputs power. The power is transmitted to the jaw 22 via the transmission block 222 and the connecting rod 221. The slider 223 slides radially along the slide groove 211, completing the clamping operation of the tapered roller bearing ring. After machining, the clamping unit 32 drives the jaw 22 to return to its original position. The lifting unit 31 removes the lifting force on the fixture base plate 21. The first return spring 224 applies a downward pushing force to the connecting rod 221, causing the transmission block 222 to move downwards, separating the transmission block 222 from the clamping unit 32, and reliably releasing the power docking.

[0042] Reference Figure 2 , Figure 6 and Figure 7As shown: The lifting unit 31 is fixedly disposed on the lower surface of the tooling base plate 1 and rotates synchronously with the tooling base plate 1. The lifting unit 31 includes a lifting block 311 and a lifting drive structure 312. The lifting block 311 includes a base cylinder 3111 and a plurality of protrusions 3112, which are spirally disposed on the base cylinder 3111. The lifting drive structure 312 is used to drive the base cylinder 3111 to rotate. The plurality of protrusions 3112 correspond one-to-one with a plurality of guide transmission rods 23 located on the same straight line on a plurality of clamping tooling 2. The lifting drive structure 312 includes a second rotary driver 3121 and a gear transmission group 3122. The second rotary driver 3121 is disposed on one side of the base cylinder 3111, and the gear transmission group 3122 transmits the torque of the second rotary driver 3121 to the base cylinder 3111.

[0043] The CNC machine tool selects the corresponding clamping fixture 2. The lifting drive structure 312 outputs torque to drive the base cylinder 3111 to rotate. The protrusions 3112, which are spirally arranged on the base cylinder 3111, rotate with the base cylinder 3111. The protrusions 3112 contact the guide transmission rod 23 of the corresponding clamping fixture 2 and apply an upward pushing force, lifting the target clamping fixture 2 to the machining position. The other clamping fixtures 2 remain in a low position. After machining is completed, the lifting drive structure 312 drives the base cylinder 3111 to rotate in the opposite direction. The protrusions 3112 disengage from the guide transmission rod 23, removing their supporting effect on the guide transmission rod 23. The clamping fixture 2 falls back down, realizing the lifting and lowering switching of the clamping fixture 2.

[0044] Reference Figure 2 , Figure 8 and Figure 10 As shown: The clamping unit 32 is fixedly disposed on the lower surface of the tooling base plate 1 and rotates synchronously with the tooling base plate 1. The clamping unit 32 includes a clamping drive block 321 and a linear drive structure 322. The clamping drive block 321 is used to dock with the clamping fixture 2 and drive the jaws 22 of the clamping fixture 2 to move radially. The linear drive structure 322 drives the clamping drive block 321 to move radially along the main shaft 11. The fixed end of the linear drive structure 322 is installed below the tooling base plate 1, and the output end is connected to the clamping drive block 321.

[0045] The clamping drive block 321 is connected to the transmission block 222 of the upward-lifting clamping fixture 2. The linear drive structure 322 includes a linear driver 3221 and a transmission connecting plate 3222. The output end of the linear driver 3221 pushes the clamping drive block 321 to move through the transmission connecting plate 3222.

[0046] The lifting unit 31 lifts the target clamping fixture 2 upwards to the machining station, and the transmission block 222 of the clamping fixture 2 docks with the clamping drive block 321. After the tapered roller bearing ring is placed in place, the linear drive structure 322 outputs power to drive the clamping drive block 321 to move radially along the main shaft 11. The clamping drive block 321 drives the jaws 22 to move radially via the transmission block 222. When machining the inner tapered roller ring, the clamping drive block 321 moves outwards, and the multiple jaws 22 open and clamp the inner hole of the inner tapered roller ring. When machining the outer tapered roller ring, the clamping drive block 321 moves inwards, and the multiple jaws 22 close and clamp the outer circle of the outer tapered roller ring. The same set of linear drive structure 322 can realize both the inner ring opening and the outer ring closing clamping operations.

[0047] Reference Figure 8 and Figure 9 As shown: The clamping drive block 321 has multiple slots 3211 spaced at equal intervals.

[0048] The transmission block 222 moves upward to insert into the slot 3211 and moves along with the clamping drive block 321.

[0049] The lifting unit 31 applies an upward thrust to the selected clamping fixture 2, lifting it to the machining station. The transmission block 222 of the clamping fixture 2 moves upward and engages with a slot 3211 on the clamping drive block 321, completing the engagement. After the tapered roller bearing ring is in place, the linear drive structure 322 drives the clamping drive block 321 to move radially along the spindle 11. The inner wall of the slot 3211 presses against the transmission block 222, transmitting the radial driving force to the jaws 22, thus clamping the ring. After machining, the lifting unit 31 removes the upward thrust, the clamping fixture 2 falls back downward, and the transmission block 222 disengages from the slot 3211, achieving the engagement and disengagement of power through the lifting and lowering motion of the clamping fixture 2.

[0050] Reference Figure 8 and Figure 10 As shown: The clamping unit 32 further includes a limiting sliding structure 323, which constrains the movement direction of the clamping drive block 321.

[0051] Among them, there are two limiting sliding structures 323, which are respectively arranged on both sides of the clamping drive block 321. The limiting sliding structure 323 includes a slide rail 3231 and a slide bar 3232. The slide bar 3232 is fixedly connected to the clamping drive block 321, and the slide bar 3232 is slidably arranged on the slide rail 3231.

[0052] The lifting unit 31 lifts the target clamping fixture 2 upwards to the machining station, where it docks with the clamping drive block 321. After the tapered roller bearing ring is placed in position, the linear drive structure 322 outputs power to drive the clamping drive block 321 to perform a translational motion. The limiting sliding structure 323 constrains the clamping drive block 321, limiting its movement to the radial direction of the spindle 11 and preventing lateral displacement. The clamping drive block 321 drives the clamping fixture 2 to perform radial movement, completing the clamping operation of the tapered roller bearing ring. This ensures the accurate direction of the radial driving force output by the clamping drive block 321 and maintains the centering accuracy of the ring clamping.

[0053] Reference Figure 1 and Figure 11 As shown: the main shaft 11 is configured as a hollow structure; the suction assembly 4 includes a negative pressure air duct 41, the air inlet of the negative pressure air duct 41 is arranged facing the tooling base plate 1, and the negative pressure air duct 41 is connected to the hollow main shaft 11.

[0054] The first rotary actuator 12 drives the hollow spindle 11 to rotate. The spindle 11 drives the tooling base plate 1, the clamping fixture 2, and the tapered roller bearing ring to rotate synchronously to carry out cutting. The lifting unit 31 and the clamping unit 32 are both fixedly installed on the lower surface of the tooling base plate 1 and rotate synchronously with the tooling base plate 1. The second rotary actuator 3121 and the linear actuator 3221 are connected to the external power supply through the conductive slip ring passing through the hollow spindle 11. The clamping drive block 321, the lifting block 311 and the corresponding clamping fixture 2 maintain a circumferential fixed alignment relationship. When the tooling base plate 1 rotates, there is no relative circumferential movement between the lifting unit 31, the clamping unit 32 and the clamping fixture 2. The negative pressure air duct 41 of the suction assembly 4 is connected to the negative pressure air source. The lower end of the hollow spindle 11 is connected to the external negative pressure air source through a rotary joint. The air inlet of the negative pressure air duct 41 arranged towards the tooling base plate 1 forms a negative pressure environment in the processing area. The chips generated by cutting are sucked into the negative pressure air duct 41 and the inner cavity of the hollow spindle 11 by the negative pressure airflow and discharged downward, thereby timely suctioning of the chips generated in the processing area, reducing chip accumulation and reducing the interference of chip retention on the processing process.

[0055] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A CNC machine tool for producing tapered roller bearings, characterized in that, It includes a tooling substrate (1), a clamping tool (2), a switching mechanism (3), and a suction assembly (4); A spindle (11) and a first rotary driver (12) for driving the spindle (11) to rotate are provided below the tooling base plate (1). The clamping fixture (2) has multiple clamping fixtures (2) with different specifications. The multiple clamping fixtures (2) are coaxially arranged about the axis of the main shaft (11). The clamping fixture (2) includes multiple jaws (22) that can slide radially. The switching mechanism (3) includes a lifting unit (31) and multiple clamping units (32). The lifting unit (31) is coaxially arranged with the spindle (11). The lifting unit (31) selects to lift the target clamping fixture (2) to the machining station. The multiple clamping units (32) are arranged circumferentially around the spindle (11). The clamping units (32) are used to drive the clamping fixture (2) to move radially. The suction component (4) is used to suction the chips generated during the processing.

2. A CNC machine tool for producing tapered roller bearings according to claim 1, characterized in that, The clamping fixture (2) also includes a fixture base plate (21), which is coaxially arranged with the main shaft (11); a plurality of jaws (22) are evenly distributed on the fixture base plate (21), and a connecting rod (221) is provided at the lower end of the jaw (22), and a transmission block (222) that docks with the clamping unit (32) is provided at the lower end of the connecting rod (221).

3. A CNC machine tool for producing tapered roller bearings according to claim 2, characterized in that, The clamping fixture (2) also includes a guide transmission rod (23). One end of the guide transmission rod (23) is fixedly connected to the fixture base plate (21), and the other end passes through the fixture base plate (1) and is connected to the lifting unit (31). The guide transmission rod (23) and the through hole of the fixture base plate (1) form a circumferential transmission fit through a keyway structure, which is used to transmit the rotational torque of the fixture base plate (1) to the clamping fixture (2). A second return spring (24) that provides downward preload is sleeved on the guide transmission rod (23).

4. A CNC machine tool for producing tapered roller bearings according to claim 2, characterized in that, The tooling base plate (21) has a groove (211) facing its center, and the claw (22) is provided with a slider (223), which is slidably disposed in the groove (211).

5. A CNC machine tool for producing tapered roller bearings according to claim 2, characterized in that, A first return spring (224) is also sleeved on the connecting rod (221), which is used to provide a downward thrust to the connecting rod (221).

6. A CNC machine tool for producing tapered roller bearings according to claim 1, characterized in that, The lifting unit (31) is fixedly disposed below the tooling base plate (1). The lifting unit (31) includes a lifting block (311) and a lifting drive structure (312). The lifting block (311) includes a base cylinder (3111) and a plurality of protrusions (3112), which are spirally arranged on the base cylinder (3111). The lifting drive structure (312) is used to drive the base cylinder (3111) to rotate.

7. A CNC machine tool for producing tapered roller bearings according to claim 1, characterized in that, The clamping unit (32) is fixedly disposed below the tooling base plate (1). The clamping unit (32) includes a clamping drive block (321) and a linear drive structure (322). The clamping drive block (321) is used to dock with the clamping fixture (2) and drive the jaws (22) of the clamping fixture (2) to move radially; The linear drive structure (322) drives the clamping drive block (321) to move radially along the main shaft (11).

8. A CNC machine tool for producing tapered roller bearings according to claim 7, characterized in that, The clamping drive block (321) has multiple slots (3211) spaced at equal intervals.

9. A CNC machine tool for producing tapered roller bearings according to claim 7 or 8, characterized in that, The clamping unit (32) further includes a limiting sliding structure (323), which constrains the movement direction of the clamping drive block (321).

10. A CNC machine tool for producing tapered roller bearings according to claim 1, characterized in that, The main shaft (11) is configured as a hollow structure; the suction assembly (4) includes a negative pressure air duct (41), the air inlet of which is arranged toward the tooling base plate (1).

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