Indexing rotary table of numerical control milling and boring machine

Abstract

The invention relates to the technical field of numerical control machining, in particular to a numerical control milling and boring machine indexing rotary table which comprises a driving machine box, a two-shaft transmission assembly, a tool clamp and an adjustable indexing assembly. A cover plate is arranged on the side face of the driving machine box, the two-shaft transmission assembly is rotationally installed on the surface of the cover plate, and a first driving motor drives a first gear ring and an annular pressing plate to achieve overall deflection. The adjustable indexing assembly comprises a tray base, a supporting lug, a displacement driver and a conical guide roller, a transmission conical disc is arranged at the bottom of the tray base, the displacement driver drives a sliding block and a transmission ball through a lead screw motor, the transmission ball is made to move in the radial direction of the bottom face of the transmission conical disc, continuous adjustment of the conical surface transmission ratio is achieved, and the requirements for large-stroke indexing and high-precision differential indexing are met. Independent control over deflection and autorotation is achieved, the stepless transmission ratio adjusting capacity is achieved, the indexing precision, the response speed and the machining stability are improved, and the method is suitable for various types of high-precision milling and boring machining equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical control machining, in particular to a dividing rotary table of a numerical control milling and boring machine. BACKGROUND

[0002] In the numerical control milling and boring equipment, the dividing rotary table as a key workpiece positioning mechanism, its dividing accuracy and response speed directly affect the machining quality. In the prior art, the dividing rotary table usually adopts a gear mechanism or a worm and worm gear mechanism with a fixed transmission ratio to realize the angular indexing of the workpiece. Although such structure has a mature transmission form, it is subject to the fixed tooth ratio and cannot adjust the transmission ratio according to the machining requirements, so that it is difficult to balance between large-angle fast indexing and small-angle precise indexing. When high-precision indexing machining is required, the fixed transmission ratio mechanism is often limited by the meshing gap and the structural stiffness, resulting in that the dividing accuracy is difficult to be continuously stable, and the flexible adjustment under different working conditions cannot be realized.

[0003] In the existing dividing device, a single motor driving structure is usually adopted, which drives the deflection and rotation of the workpiece through a mechanical distribution mechanism, so that the deflection and rotation cannot be completely independently controlled. When the machining process requires independent adjustment of the workpiece attitude and the workpiece rotation, the traditional structure often needs complex mechanical linkage or additional adjusting components, resulting in an increase in the structure size, a long transmission chain, slow adjustment response, and a reduction in the stability of the whole machine operation. In addition, when the two actions are coupled with each other, the positioning accuracy is also affected, so that the system is difficult to meet the high dynamic positioning requirements of numerical control machining.

[0004] In the existing adjustable transmission structure, the variable position adjusting mode usually adopts a discrete structure such as a shift fork, a cam or a limit block to switch the gear position. This way can only adjust the transmission ratio between several fixed positions, lacks continuous adjusting ability, and is difficult to realize dynamic stepless adjustment in the machining process. At the same time, the traditional variable position structure usually adopts rigid hard contact between the contact surfaces, which is easy to produce impact in the high-speed meshing process, resulting in unstable transmission ratio change, and easy to appear gap change in the transmission process, thereby affecting the overall dividing accuracy.

[0005] In summary, the existing dividing rotary table generally has problems such as unchangeable transmission ratio, inability to independently control the deflection and rotation, inability to steplessly adjust the variable position mechanism, and large limitation of dividing accuracy by structure, which is difficult to meet the comprehensive requirements of flexibility, accuracy and control stability in the complex numerical control milling and boring machining scene. Therefore, it is urgent to provide a dividing rotary table structure which can realize variable transmission ratio control, independent driving of deflection and rotation, and stepless transmission ratio control, to overcome the shortcomings of the prior art. SUMMARY

[0006] The present application aims to overcome the technical deficiencies of the existing numerical control milling and boring equipment, such as the non-adjustable transmission ratio, the inability to independently control the deflection and rotation actions, the insufficient indexing accuracy, and the inability to achieve stepless adjustment of the displacement structure, and provides a numerical control milling and boring machine indexing turntable. Through the cooperative matching between the two-axis transmission assembly, the adjustable indexing assembly, and the displacement transmission, the deflection control, the rotation control, and the variable transmission ratio control of the tooling fixture and the workpiece carried thereby are achieved, which can meet the requirements of large-stroke deflection, micro-graduated indexing, and high-precision angle control for complex milling and boring processes.

[0007] To achieve the above-mentioned purpose, the present application provides a numerical control milling and boring machine indexing turntable, which comprises a drive machine box, a two-axis transmission assembly, a tooling fixture, and an adjustable indexing assembly. The overall structure is independently controlled by a first drive motor and a second drive motor, so that the deflection action and the rotation action do not interfere with each other. A conical surface transmission ratio control mechanism is constructed by a conical guide roller, a transmission cone disc, and a transmission ball to realize the continuous adjustment function from large-stroke indexing to high-precision micro-graduated indexing.

[0008] In a preferred example, the numerical control milling and boring machine indexing turntable provided by the present application comprises a drive machine box, a two-axis transmission assembly, a tooling fixture, and an adjustable indexing assembly. The side surface of the drive machine box is fixedly installed with a cover plate, and the two-axis transmission assembly is rotatably installed on the surface of the cover plate. The adjustable indexing assembly comprises a tray seat, a supporting lug, a displacement transmission, and a conical guide roller. The surface of the tray seat is provided with a shaft head for rotatably connecting with the bottom surface of the tooling fixture. The bottom of the tooling fixture is fixedly installed with a transmission cone disc. One end of the tray seat is fixedly connected with the two-axis transmission assembly. The surface of the drive machine box is respectively provided with a first drive motor for driving the overall deflection of the two-axis transmission assembly and the adjustable indexing assembly, and a second drive motor for driving the rotation of the conical guide roller. The displacement transmission comprises a fixed ring, a screw motor, a slide rod, a screw rod, a sliding block, and transmission balls penetrating the sliding block, for realizing the transmission ratio control between the conical guide roller and the transmission cone disc.

[0009] The specific technical effect is to realize the modular structure of the deflection control, the rotation control, and the transmission ratio control of the tooling fixture, so that the indexing process has high stability, high response speed, and high precision capability.

[0010] In a preferred example, the two-axis transmission assembly comprises a ring pressure plate, a first tooth ring, and a second tooth ring. The ring pressure plate is used to stop the pressure of the two tooth rings on both sides. The first tooth ring and the second tooth ring are respectively located on both sides of the cover plate and rotatably slide. The surface of the drive machine box is provided with a first tooth shaft and a second tooth shaft, which are engaged with the first tooth ring and the second tooth ring for transmission, and are respectively engaged with the output ends of the first drive motor and the second drive motor.

[0011] The specific technical effect is to form the independent structure of the deflection driving chain and the indexing driving chain, so that the deflection action and the rotation action are no longer coupled, and the controllability and the motion precision of the overall control are improved.

[0012] In a preferred example, the first tooth ring and the second tooth ring are provided with ball bearings on both sides in sliding abutment with the surface of the cover plate, reducing the rotational friction of the tooth ring; the first tooth ring is fixedly connected with the surface of the ring pressing plate, for realizing the overall deflection of the two-axis transmission assembly under the driving of the first driving motor; one end of the conical guide roller is provided with a transmission gear shaft meshing with the inner side of the second tooth ring, for realizing the synchronous rotation of the second tooth ring and the conical guide roller under the driving of the second driving motor.

[0013] The specific technical effect is: to realize low-resistance and stable tooth ring rotation, to strengthen the driving ability of the conical guide roller, and to improve the overall indexing accuracy.

[0014] In a preferred example, the ring pressing plate, the first tooth ring and the second tooth ring are coaxially arranged; the tooth shaft is rotatably installed in the inner side of the ring pressing plate and abuts against the inner circumferential surface of the second tooth ring, avoiding radial deviation of the second tooth ring during rotation.

[0015] The specific technical effect is: to strengthen the rotation stability of the second tooth ring and to ensure the accurate and reliable rotation track during high-speed indexing or micro-indexing.

[0016] In a preferred example, the conical guide roller is conical and rotatably installed on the surface of the ring pressing plate; the bottom surface of the transmission cone disc is conical and arranged in parallel with the top surface of the conical guide roller; the outer side of the transmission ball is sleeved with a rubber sleeve and in sliding abutment with the bottom surface of the transmission cone disc and the surface of the conical guide roller, respectively.

[0017] The specific technical effect is: to form a flexible and reliable conical transmission interface, to make the transmission process smooth, and to improve the transmission accuracy of small-angle micro-indexing.

[0018] In a preferred example, the screw rod and the slide rod are arranged in parallel on the surface of the fixed ring, the slide rod is a multi-rib slide rod structure, the slide block is sleeved and slides along the surface thereof to drive the radial movement of the transmission ball.

[0019] The specific technical effect is: to realize variable adjustment of the transmission ratio, so that the indexing action can be continuously switched between coarse indexing and fine indexing according to the working conditions.

[0020] In a preferred example, the first driving motor and the second driving motor are both servo motor structures and are electrically connected with a servo control system.

[0021] The specific technical effect is: to enable the deflection angle and the indexing angle to be closed-loop servo controlled, thereby improving the action response speed and the final positioning accuracy.

[0022] In a preferred example, a plurality of supporting lugs are fixed in the circumferential direction on the outer periphery of the tray seat, the supporting lugs are provided with ball bearings in sliding abutment with the bottom surface of the transmission cone disc, for supporting the transmission cone disc and the tool fixture.

[0023] The specific technical effects are: to improve the load-bearing stability of tooling fixtures, to avoid offset or vibration during indexing, and to ensure the accuracy and repeatability of machining positioning.

[0024] The beneficial effects achieved by this invention are as follows: 1. This invention achieves continuous adjustment of the variable transmission ratio by setting up a conical transmission ratio control structure composed of a transmission cone, a conical guide roller, and a transmission ball, making the indexing action highly controllable over a large stroke range. Under the action of the radial position change of the transmission ball, the contact radius between the conical surfaces can freely change, thereby achieving flexible control of the indexing accuracy. This can meet the different accuracy requirements of coarse and fine indexing in various machining processes, significantly improving the applicability of CNC milling and boring equipment in high-precision indexing scenarios.

[0025] 2. This invention achieves separate driving control for the deflection and rotation of the tooling fixture and its supporting workpiece by independently setting the first and second drive motors. This allows for separate servo adjustment of the deflection angle and the indexing angle, with the drive modes not interfering with each other, thus improving the stability and response speed of the positioning control. The independent control structure provides greater flexibility in the machining process, allowing for precise programming and adjustment of the workpiece's posture and indexing angle according to the machining program, significantly improving overall machining efficiency.

[0026] 3. The displacement transmission device of this invention adopts a stepless adjustment structure, relying on a lead screw motor to drive the slider and transmission ball to achieve continuously variable transmission ratio control. This allows for stepless adjustment of the transmission relationship between the conical guide roller and the transmission cone, without being limited by a fixed meshing ratio. This structure not only improves the precision of indexing adjustment but also effectively reduces the errors caused by meshing runout in traditional fixed-ratio transmission mechanisms, ensuring that the entire indexing system maintains stability, reliability, and high repeatability during dynamic indexing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 This is a schematic diagram of the cover plate surface structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the drive chassis according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a two-axis transmission assembly and an adjustable indexing assembly according to an embodiment of the present invention; Figure 5 This is an exploded view of a two-axis transmission assembly according to an embodiment of the present invention; Figure 6 This is a side view of an adjustable indexing component according to an embodiment of the present invention; Figure 7This is a schematic diagram of the displacement actuator and tapered guide roller structure according to an embodiment of the present invention.

[0028] Figure label: 100. Drive housing; 110. Cover plate; 120. First drive motor; 130. Second drive motor; 121. First gear shaft; 131. Second gear shaft; 200. Two-shaft transmission assembly; 210. Ring pressure plate; 220. First gear ring; 230. Second gear ring; 300. Tooling fixtures; 310. Transmission cone disc; 400 Adjustable indexing assembly; 410 Pallet seat; 420 Lug; 430 Positioning actuator; 440 Conical guide roller; 411 Shaft head; 431 Retaining ring; 432 Lead screw motor; 433 Slide rod; 434 Lead screw; 435 Slider; 436 Transmission ball; 441 Transmission gear shaft. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0030] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0031] The following describes, with reference to the accompanying drawings, some embodiments of a CNC milling and boring machine indexing rotary table provided by the present invention.

[0032] Combination Figures 1-7 As shown, the present invention provides a CNC milling and boring machine indexing rotary table, including a drive housing 100, a two-axis transmission assembly 200, a tooling fixture 300, and an adjustable indexing assembly 400.

[0033] A cover plate 110 is fixedly installed on one side of the drive housing 100. The cover plate 110 is used to enclose the interior of the drive housing 100 and serves as a mounting base for the two-axis transmission assembly 200. The two-axis transmission assembly 200 is rotatably mounted on the surface of the cover plate 110 through multiple rotational support points to achieve deflection around the central axis.

[0034] The adjustable indexing assembly 400 includes a tray base 410, a lug 420, a displacement actuator 430, and a conical guide roller 440. The conical guide roller 440 is mounted on the inner side of the tray base 410 via a rotating shaft mechanism and is used to convert the rotation of the second toothed ring 230 into the differential rotation of the transmission cone disk 310.

[0035] The surface of the tray seat 410 is provided with a shaft head 411, which is used to rotatably connect with the bottom surface of the tooling fixture 300. A transmission cone disc 310 is fixedly installed on the bottom surface of the tooling fixture 300, and the transmission cone disc 310 and the cone guide roller 440 are in a cone-surface contact relationship.

[0036] One end of the pallet seat 410 is fixedly connected to the two-axis transmission assembly 200 by a bolt structure, so that the deflection of the two-axis transmission assembly 200 can drive the pallet seat 410 and the tooling fixture 300 to deflect as a whole.

[0037] A first drive motor 120 is mounted on the surface of the drive housing 100, and its output end is connected to the first gear shaft 121 for driving the two-shaft transmission assembly 200 to deflect as a whole; a second drive motor 130 is also provided on the surface of the drive housing 100, and its output end is connected to the second gear shaft 131 for driving the rotation of the conical guide roller 440.

[0038] The displacement actuator 430 includes a fixed ring 431, a lead screw motor 432, a slide bar 433, a lead screw 434, a slider 435, and a transmission ball 436. The fixed ring 431 and the lead screw motor 432 are both fixedly mounted on the surface of the tray base 410. The lead screw motor 432 drives the lead screw 434 to rotate, causing the slider 435 to slide along the slide bar 433. The transmission ball 436 is installed through the upper and lower sides of the slider 435. The transmission ball 436 slides and abuts against the top surface of the conical guide roller 440 and the bottom surface of the transmission cone disk 310, respectively, to realize the transmission ratio adjustment between the two cone surfaces.

[0039] Through the above structural combination, the present invention forms three synergistic structures: deflection drive, fine indexing drive, and transmission ratio control.

[0040] like Figure 3 , Figure 5 As shown, the two-shaft transmission assembly 200 includes a ring pressure plate 210, a first gear ring 220, and a second gear ring 230.

[0041] The ring pressure plate 210 is configured as a disc structure to stop the pressure on both sides of the first toothed ring 220 and the second toothed ring 230, so that the two toothed rings maintain a stable positional relationship during meshing and deflection.

[0042] The first gear ring 220 and the second gear ring 230 are located on the left and right sides of the cover plate 110, respectively, and can rotate and slide relative to the cover plate 110. Their outer circumferential surfaces mesh with the first gear shaft 121 and the second gear shaft 131, respectively. The drive housing 100 is provided with the first gear shaft 121 and the second gear shaft 131, wherein the first gear shaft 121 meshes with the output end of the first drive motor 120 for transmission, and the second gear shaft 131 meshes with the output end of the second drive motor 130 for transmission.

[0043] With the above structure, the first drive motor 120 can drive the first toothed ring 220 and the ring pressure plate 210 to deflect as a whole, and the second drive motor 130 can drive the second toothed ring 230 and the conical guide roller 440 to rotate independently.

[0044] like Figure 3 and Figure 4 As shown, both sides of the first toothed ring 220 and the second toothed ring 230 are provided with a number of balls. These balls slide against the surface of the cover plate 110 to reduce the friction of the toothed ring during rotation and improve the deflection stability.

[0045] The first toothed ring 220 is fixedly connected to the ring pressure plate 210 by bolts, so that when the first drive motor 120 drives the first toothed ring 220 to rotate, it can directly drive the ring pressure plate 210 to deflect, thereby realizing the overall deflection action of the two-shaft transmission assembly 200.

[0046] One end of the tapered guide roller 440 is provided with a transmission gear shaft 441, which meshes with the inner side of the second gear ring 230. When the second drive motor 130 drives the second gear ring 230 to rotate, the tapered guide roller 440 synchronously achieves active rotation, which is used to drive the tooling fixture 300 to perform indexing adjustment.

[0047] like Figure 5 As shown, the ring pressure plate 210, the first toothed ring 220 and the second toothed ring 230 are all arranged coaxially and are coaxially set in the center structure of the turntable, so that the deflection and rotation of the two toothed rings maintain the same central reference and improve the overall rotation accuracy.

[0048] Several toothed shafts are rotatably mounted on the inner side of the ring pressure plate 210. These toothed shafts abut against the inner circumferential surface of the second toothed ring 230, and are used to provide pressure stability and prevent the second toothed ring 230 from radially deviating when it rotates.

[0049] This structure is used to improve the rotational accuracy and support strength of the second toothed ring 230 during high-speed, small-angle indexing.

[0050] like Figure 6 and Figure 7 As shown, the tapered guide roller 440 has a tapered structure, and its lower end is mounted on the surface of the ring pressure plate 210 via a rotating shaft; the bottom surface of the transmission tapered disc 310 is also tapered and is arranged parallel to the top surface of the tapered guide roller 440. The surfaces of both the transmission tapered disc 310 and the tapered guide roller 440 are frosted to improve the contact friction between the surface and the transmission ball 436, ensuring the stability of CNC machining.

[0051] A rubber sleeve is fitted around the outer side of the transmission ball 436, which slides and abuts against the bottom surface of the transmission cone disk 310 and the surface of the cone guide roller 440, respectively. The transmission ball 436 achieves flexible contact through the rubber sleeve, making the torque transmission between the two cone surfaces stable and providing excellent impact resistance.

[0052] like Figure 7 As shown, the lead screw 434 and the slide bar 433 are arranged parallel to each other on the surface of the fixed ring 431. The slide bar 433 has a multi-faceted structure, which prevents the slider 435 from rotating and shifting when it slides along its surface.

[0053] When the slider 435 moves along the slide bar 433, it causes the transmission ball 436, which runs through the top and bottom of the slider 435, to change its radial position, so that the transmission ball 436 produces an adjustable transmission ratio offset between the two conical surfaces, thereby realizing continuous variable control of the transmission ratio.

[0054] In this embodiment, both the first drive motor 120 and the second drive motor 130 adopt a servo motor structure, and their input terminals are electrically connected to the servo control system to realize real-time closed-loop control of the deflection angle and the indexing angle.

[0055] like Figure 6 As shown, several lugs 420 are evenly arranged on the outer periphery of the pallet seat 410. Each lug 420 has multiple balls on its surface, which form a rolling support with the bottom surface of the transmission cone disk 310. This is used to support the weight of the tooling fixture 300 during the indexing operation and maintain the stability of the indexing process.

[0056] Working principle and usage process of this invention: This invention discloses a CNC milling and boring machine indexing rotary table. During actual operation, the deflection angle and indexing angle of the rotary table are precisely controlled through two independent drive mechanisms, and the adjustable indexing component enables continuous and programmable indexing adjustment of the tooling fixture. Its overall working principle is as follows.

[0057] After the first drive motor 120 starts, it drives the first gear shaft 121 to rotate via its output end. The first gear shaft 121 meshes with the first gear ring 220, causing the first gear ring 220 to rotate circumferentially along the surface of the cover plate 110. Since the first gear ring 220 is fixedly connected to the surface of the ring pressure plate 210, and the first gear ring 220 and the second gear ring 230 are located on both sides of the ring pressure plate 210 respectively, under the driving action of the first gear ring 220, the two-shaft transmission assembly 200 as a whole deflects around the central axis of the turntable, causing the pallet seat 410 and the tooling fixture 300 to deflect as a whole, realizing the basic angle adjustment of the indexing turntable. During this process, the amount of deflection of the second gear ring 230 caused by the deflection of the first gear ring 220 and the ring pressure plate 210 can be eliminated by controlling the second drive motor 130 to reverse through the control system.

[0058] Secondly, when fine indexing adjustment of the tooling fixture 300 is required, the second drive motor 130 starts, and its output shaft drives the second gear shaft 131 to rotate. The second gear shaft 131 meshes with the second gear ring 230, causing the second gear ring 230 to rotate independently relative to the cover plate 110. The transmission gear shaft 441 located inside the second gear ring 230 meshes with the second gear ring 230. When the second gear ring 230 rotates, the transmission gear shaft 441 simultaneously drives the conical guide roller 440 to rotate.

[0059] Since the tapered guide roller 440 has a tapered structure, its upper end is in contact with the bottom surface of the transmission tapered disk 310 and the upper and lower surfaces of the transmission ball 436 to achieve transmission connection between the two tapered surfaces through the transmission ball 436. The rotation of the tapered guide roller 440 is converted into the differential angle change of the transmission tapered disk 310, thereby realizing the precision indexing adjustment of the tooling fixture 300.

[0060] During the differential adjustment process, the transmission ball 436 plays a crucial role in displacement conversion. The lead screw motor 432 drives the slider 435 to move linearly along the slide bar 433 via the lead screw 434. The movement of the slider 435 directly pushes the transmission ball 436, which runs through its upper and lower sides, so that the transmission ball 436 maintains continuous sliding contact with the top surface of the cone guide roller 440 and the bottom surface of the transmission cone disk 310, respectively. Because the transmission ball 436 has a sleeved structure, it can ensure the flexible fit stability between the two cone surfaces. At the same time, the synchronous contact at its upper and lower ends makes the torque transmission between the two cone surfaces more uniform, ensuring a precise linear response for the indexing angle adjustment. The transmission ball 436 is controlled by the lead screw motor 432 to move radially along the bottom surface of the transmission cone disk 310. The closer the ball is to the axis of the transmission cone disk 310, the smaller the transmission ratio between the cone guide roller 440 and the transmission cone disk 310, which allows for large-scale control. The farther the ball 436 is from the axis of the transmission cone disk 310, the larger the transmission ratio between the cone guide roller 440 and the transmission cone disk 310, which allows for more precise amplitude control.

[0061] In addition, the outer periphery of the tray base 410 is provided with multiple lugs 420, and each lug 420 is provided with a ball bearing support point above it. When the transmission cone disk 310 rotates, the ball bearings make low-friction rolling contact with its bottom surface to support the weight of the tooling fixture 300 and provide stable support during the indexing angle change process, so that the indexing action is free from shaking and lateral displacement, thereby ensuring the machining positioning accuracy of the tooling fixture 300.

[0062] In summary, when the CNC system inputs deflection angle and indexing angle commands, the first drive motor 120 is responsible for driving the overall angle deflection to control the workpiece tilting and deflection. The second drive motor 130, in conjunction with the positioner 430, achieves fine indexing adjustment of the workpiece rotation angle. The two motors work together to enable the tooling fixture 300 to quickly, continuously, and repeatedly complete indexing actions at any angle. Through the conical transmission ratio adjustment structure composed of the conical guide roller 440, the transmission conical disk 310, and the transmission ball 436, fine-tuning level angle variation control is achieved, meeting the positioning requirements of various precision milling and boring equipment.

[0063] During operation, this invention, through the cooperation of two-stage transmission (gear ring drive and conical differential drive) and transmission ratio adjustment mechanism, not only ensures high precision and high response speed of indexing action, but also effectively reduces mechanical friction and load impact, thereby improving the service life, stability and machining accuracy of the entire indexing turntable.

[0064] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dividing head for a CNC milling and boring machine, characterised in that, Include: Drive case (100), two-axis transmission assembly (200), tool fixture (300) and adjustable indexing assembly (400); One side of the drive case (100) is fixedly installed with a cover plate (110), and the two-axis transmission assembly (200) is rotatably installed on the surface of the cover plate (110); The adjustable indexing assembly (400) includes a tray seat (410), a tole (420), a displacement transmission (430) and a tapered guide roller (440), the tapered guide roller (440) is rotatably installed on the inner side of the tray seat (410); The upper surface of the tray seat (410) is provided with a shaft head (411) for rotatably connecting with the bottom surface of the tool fixture (300); The bottom surface of the tool fixture (300) is fixedly connected with a transmission cone disc (310); One end of the tray seat (410) is fixedly connected with the outer side of the two-axis transmission assembly (200); The surface of the drive case (100) is provided with a first drive motor (120) for driving the overall deflection of the two-axis transmission assembly (200) and the adjustable indexing assembly (400); The surface of the drive case (100) is also provided with a second drive motor (130) for driving the rotation of the tapered guide roller (440).

2. The CNC milling and boring machine indexing rotary table of claim 1, wherein: The displacement transmission (430) includes a fixed ring (431), a lead screw motor (432), a slide rod (433), a lead screw (434), a slide block (435) and a transmission ball (436), the fixed ring (431) and the lead screw motor (432) are fixedly installed on the surface of the tray seat (410); The output end of the lead screw motor (432) is connected with the lead screw (434), and the slide rod (433) is arranged in parallel with the lead screw (434); The slide block (435) is slidably installed on the slide rod (433) and is threadedly connected with the lead screw (434); The transmission ball (436) is disposed through the upper and lower sides of the slide block (435), the upper end thereof is in sliding abutment with the top surface of the tapered guide roller (440), and the lower end thereof is in sliding abutment with the bottom surface of the transmission cone disc (310).

3. The CNC milling and boring machine indexing rotary table of claim 1, wherein: The two-axis transmission assembly (200) includes a ring pressing plate (210), a first tooth ring (220) and a second tooth ring (230); The ring pressing plate (210) is used to stop pressing the two sides of the first tooth ring (220) and the second tooth ring (230); The first tooth ring (220) and the second tooth ring (230) are respectively arranged on the two sides of the cover plate (110) and can rotate and slide; The surface of the drive case (100) is provided with a first tooth shaft (121) and a second tooth shaft (131), and is respectively engaged with the first tooth ring (220) and the second tooth ring (230), and is respectively engaged with the output ends of the first drive motor (120) and the second drive motor (130).

4. The CNC milling and boring machine indexing rotary table of claim 3, wherein: Both sides of the first tooth ring (220) and the second tooth ring (230) are provided with a plurality of balls which slide against the surface of the cover plate (110); the first tooth ring (220) is fixedly connected with the ring pressing plate (210); one end of the taper guide roller (440) is provided with a transmission gear shaft (441), and the transmission gear shaft (441) is engaged with the inner side of the second tooth ring (230).

5. The CNC milling and boring machine indexing rotary table of claim 3, wherein: The ring pressing plate (210), the first tooth ring (220) and the second tooth ring (230) are coaxially arranged; a plurality of gear shafts are rotatably installed on the inner side of the ring pressing plate (210), and the gear shafts abut against the inner side of the second tooth ring (230).

6. The CNC milling and boring machine indexing rotary table of claim 1, wherein: The taper guide roller (440) is conical and rotatably installed on the surface of the ring pressing plate (210); the bottom surface of the transmission cone disc (310) is conical and arranged in parallel with the top surface of the taper guide roller (440); the outer side of the transmission ball (436) is sleeved with a rubber sleeve.

7. The CNC milling and boring machine indexing rotary table of claim 2, wherein: The slide rod (433) is a multi-rib structure for limiting the sliding of the sliding block (435) along the slide rod (433) and preventing deflection; the lead screw (434) is arranged in parallel with the slide rod (433) on the surface of the fixed ring (431), and the sliding block (435) slides along the slide rod (433) under the driving of the lead screw motor (432), thereby driving the transmission ball (436) to move in radial displacement.

8. The CNC milling and boring machine indexing rotary table of claim 1, wherein: The first drive motor (120) and the second drive motor (130) are both servo motor structures and are respectively electrically connected with a servo control system.

9. The CNC milling and boring machine indexing rotary table of claim 1, wherein: A plurality of the supporting ears (420) are fixedly installed on the outer periphery of the tray seat (410) in the circumferential direction; the surface of the supporting ear (420) is provided with a plurality of balls which form rolling support with the bottom surface of the transmission cone disc (310).

Images