A high-precision rotary table bearing machining rotary support device

Abstract

The utility model relates to a high-precision rotating disc bearing machining rotary support device in bearing machining technical field, include: rotary base, power box is located in the rotary part top surface of rotary base, at least three linear slide rail pairs, along the even interval ring of power box periphery is equipped with, and the side wall of power box is provided along the radial, support piece, is located in linear slide rail pair sliding part, first hydraulic cylinder is installed in the support piece inside vertically, and its telescopic axle is used for supporting workpiece upward, wherein, all first hydraulic cylinder oil circuit series connection is established, the utility model connects through a plurality of first hydraulic cylinder with series connection oil circuit, has guaranteed that all supporting point exerts the supporting force absolute consistency to workpiece, can automatic compensation workpiece because of the slight deformation of dead weight, clamping stress or cutting force, has solved the difficult problem of traditional multi -point support in supporting force uneven fundamentally, has improved the stability and precision of processing process greatly.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and in particular to a rotary support device for high-precision turntable bearing processing. Background Technology

[0002] During the machining of large bearings, the workpiece needs to be stably and precisely supported and driven to rotate. The commonly used technical solution is to use multiple sliders to support the bottom and annular surfaces of the workpiece, achieving centering through slider movement or pusher movement. While this structure is simple, it cannot adapt to the deformation of the workpiece caused by its own weight and cutting forces, resulting in uneven support forces and affecting machining accuracy and surface quality.

[0003] To address this, we designed a rotary support device for high-precision turntable bearing machining. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a rotary support device for high-precision turntable bearing machining.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A rotary support device for high-precision turntable bearing machining includes: Rotating base; The power box is located on the top surface of the rotating part of the rotating base; At least three linear slide rail pairs are evenly spaced around the circumference of the power box and are arranged radially on the side wall of the power box. A support member is provided on the sliding part of the linear slide rail pair; The first hydraulic cylinder is vertically installed inside the support member, with its telescopic shaft facing upwards to support the workpiece; In this configuration, all the hydraulic circuits of the first hydraulic cylinders are connected in series, so that the supporting force on the workpiece is consistent.

[0006] Furthermore, the support member has an upward extension at its inner or outer end, and the extension is equipped with a second hydraulic cylinder; All the second hydraulic cylinder circuits are connected in series so that the compressive force on the workpiece is consistent.

[0007] Furthermore, the upper end of the extension is provided with a horizontal bend, and the horizontal bend is provided with a pressure head for pressing down the workpiece.

[0008] Furthermore, the linear slide rail pair includes a linear slide rail, a slider is slidably connected to the top of the linear slide rail, and a transmission screw is rotatably connected to the linear slide rail, with the transmission screw and the slider being driven together. The inner end of the transmission screw is inserted into the power box and meshes with the motor inside the power box through gears.

[0009] Furthermore, the inner end of the transmission screw in all linear guide pairs is engaged with the same motor via gears.

[0010] Furthermore, the rotating base is provided with a circular track coaxial with it; The bottom of the linear slide rail pair is provided with support rollers that match the circular track.

[0011] Furthermore, the support rollers are inclined to the circular track to compensate for deviations caused by diameter differences.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By connecting multiple first hydraulic cylinders in series with oil circuits, it is ensured that the supporting force applied to the workpiece by all supporting points is absolutely consistent. It can automatically compensate for the small deformation of the workpiece caused by its own weight, clamping stress or cutting force, fundamentally solving the problem of uneven supporting force in traditional multi-point support, and greatly improving the stability and accuracy of the machining process. 2. By driving all the transmission screws to move synchronously through a single motor, all the supporting components can move radially synchronously, ensuring that the workpiece is quickly adjusted to the center position, realizing a highly efficient automatic centering function, and adapting to the processing needs of workpieces with different diameters. 3. It integrates radial support or lateral extrusion and axial clamping functions. The second hydraulic cylinder in series provides uniform radial extrusion force. With the pressure head that can be pressed down, it forms a multi-directional and coordinated clamping and positioning of the bottom surface, side wall and top surface of the workpiece. It effectively prevents the workpiece from displacement, vibration or lifting that may occur during high-speed rotation and cutting. It is especially suitable for precision machining of large and heavy workpieces. 4. By setting up a circular track and supporting rollers coaxial with the rotating base, effective auxiliary support is provided for the extended linear slide rail pair, significantly enhancing the structural rigidity and bending and torsional resistance of the entire support system in a cantilever state. The inclined roller track design further compensates for diameter changes along the movement path, ensuring the smoothness and reliability of the support unit during radial movement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 for Figure 2 A partial schematic diagram of the AA section. Figure 4 This is a schematic diagram showing the cooperation between the motor and the transmission screw in this utility model.

[0014] In the diagram: 1. Rotating base; 2. Power box; 21. Motor; 3. Linear slide rail pair; 31. Linear slide rail; 32. Slider; 33. Transmission screw; 34. Support roller; 4. Support component; 41. Extension; 42. Horizontal bending part; 5. First hydraulic cylinder; 6. Second hydraulic cylinder; 7. Pressure head; 8. Circular track. Detailed Implementation

[0015] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0016] Example 1, in conjunction with Appendix Figure 1-4 A high-precision rotary support device for machining turntable bearings mainly includes a rotary base 1, a power box 2, a linear slide rail pair 3, a support member 4, and a first hydraulic cylinder 5.

[0017] The rotating base 1 is a common CNC rotary table in the prior art, which has a rotating part driven by a servo motor and can precisely control the rotation angle and speed. It will not be described in detail here.

[0018] The power box 2 is fixedly installed at the center of the top surface of the rotating part of the rotating base 1. A motor 21 is installed inside the power box 2. At least three radial mounting holes are evenly distributed along the circumference of the side wall of the power box 2.

[0019] The number of linear slide rail pairs 3 matches the number of mounting ports; this embodiment uses six as an example. Each linear slide rail pair 3 includes a linear slide rail 31 fixedly mounted on the mounting port on the side wall of the power box 2. A slider 32 is slidably fitted on the linear slide rail 31.

[0020] A transmission screw 33 is rotatably connected to the linear slide rail 31 via a bearing, and the transmission screw 33 is threadedly driven to engage with the slider 32. The inner end of the transmission screw 33 (the end closer to the power box 2) extends into the power box 2 and is connected to the output shaft of the motor 21 via a gear pair.

[0021] Preferably, in conjunction with the appendix Figure 4All the inner end gears of the transmission screws 33 mesh with the same driving gear on the output shaft of the motor 21, thereby ensuring that all sliders 32 can move radially synchronously and at the same speed, so as to realize the radial centering adjustment of the workpiece.

[0022] The support member 4 is fixedly mounted on the slider 32 of the linear slide rail pair 3 at its bottom, so that it can move radially together with the slider 32. A vertical mounting cavity is provided inside the support member 4.

[0023] The first hydraulic cylinder 5 is vertically embedded in the mounting cavity of the support member 4. Its cylinder body is fixed and its telescopic shaft extends upward, which is used to directly support the lower end face of the workpiece.

[0024] Specifically, the hydraulic circuits of all the first hydraulic cylinders 5 are connected in series. That is, the chambers of all the first hydraulic cylinders 5 are connected, so that under the same oil pressure, the supporting force generated by each first hydraulic cylinder 5 on the workpiece is exactly the same. This can automatically compensate for the slight deformation of the workpiece caused by its own weight or clamping, achieve uniform support, and greatly improve the processing stability.

[0025] Depending on the needs, the outer or inner end of the support member 4 is provided with an upwardly extending portion 41, which is specifically set according to the workpiece processing position. For example, when processing the inner sidewall of the workpiece, the extension portion 41 is provided at the outer end of the support member 4; when processing the outer sidewall of the workpiece, the extension portion 41 is provided at the inner end of the support member 4.

[0026] During operation, the workpiece is hoisted above the device. First, the motor 21 is started, driving all the transmission screws 33 to rotate synchronously through the gear pair, which in turn drives all the sliders 32 and support members 4 to move radially synchronously until the motor 21 is insufficient to drive the sliders 32. At this point, the jacking points of all the first hydraulic cylinders 5 move to the predetermined support position below the workpiece. Then, the hydraulic system operates, and all the first hydraulic cylinders 5 connected in series rise synchronously, using a completely uniform jacking force to smoothly lift the workpiece. Due to the uniform jacking force, extremely high machining accuracy and surface quality are guaranteed.

[0027] Example 2, in conjunction with Appendix Figure 3 A high-precision rotary support device for machining turntable bearings, based on Embodiment 1, adds a lateral stabilizing mechanism to further achieve auxiliary positioning of the inner or outer sidewall of the workpiece.

[0028] In this embodiment, a second hydraulic cylinder 6 is installed on the extension 41, and its telescopic shaft can be horizontally pointed in the direction of the workpiece, for applying a uniform radial extrusion force to the inner or outer sidewall of the workpiece.

[0029] Specifically, the oil circuits of all the second hydraulic cylinders 6 are also connected in series to ensure that the extrusion pressure at each point is exactly the same and to avoid radial displacement of the workpiece.

[0030] Furthermore, a horizontally bent portion 42, which bends horizontally in the direction of the workpiece axis, may be provided at the upper end of the extension 41. A pressure head 7 is installed at the end of the horizontally bent portion 42. When the second hydraulic cylinder 6 pushes the entire upper structure of the support member 4 to move radially, the pressure head 7 presses the workpiece from above.

[0031] Depending on the requirements, the pressure head 7 can be a screw head, which is driven to rotate by a torque wrench to press the workpiece from above; or it can be a hydraulic cylinder connected in series with the above-mentioned oil circuit.

[0032] In other embodiments, to ensure the stability of the linear slide rail pair 3 in the extended state, a coaxial circular track 8 is fixedly installed around the outer periphery of the rotating base 1. A support roller 34 is installed at the bottom of each linear slide rail 31. The rim of the support roller 34 rolls in contact with the upper or side surface of the circular track 8, providing additional auxiliary support for the linear slide rail pair 3 and preventing it from sagging due to excessive cantilever length.

[0033] Preferably, the rotation axis of the support roller 34 can be designed to be at a certain angle to the vertical direction, so that the inclined surface of its rim forms an inclined fit with the corresponding inclined surface of the circular track 8. This design can compensate for the sliding friction that occurs between the outer end of the support roller 34 and the circular track 8 due to the difference in radial length between the inner and outer ends of the support roller 34, thereby improving the smoothness of the operation of the support roller 34.

[0034] Specifically, the tilt angle is related to the central axis and diameter of the support roller 34 and the diameter of the circular track 8, which will not be elaborated here.

[0035] During operation, the workpiece is hoisted above the device. First, the motor 21 is started, driving all the transmission screws 33 to rotate synchronously through the gear pair, which in turn drives all the sliders 32 and support members 4 to move radially synchronously, thus centering the workpiece. At this time, the jacking points of all the first hydraulic cylinders 5 move to the predetermined support position below the workpiece. Then, the motor 21 drives the sliders 32 to move in the opposite direction a short distance, and then the hydraulic system corresponding to the first hydraulic cylinders 5 works, and all the first hydraulic cylinders 5 connected in series rise synchronously, lifting the workpiece smoothly with a completely consistent jacking force. Because the jacking force is uniform, extremely high processing accuracy and surface quality are guaranteed. If lateral positioning is required, then the hydraulic system corresponding to the second hydraulic cylinders 6 works. The second hydraulic cylinders 6 ensure uniform extrusion force on the side wall of the workpiece through the series oil circuit.

[0036] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A rotary support device for machining high-precision turntable bearings, characterized in that, include: Rotating base (1); The power box (2) is located on the top surface of the rotating part of the rotating base (1); At least three linear slide rail pairs (3) are evenly spaced around the circumference of the power box (2) and arranged radially on the side wall of the power box (2); Support member (4) is provided on the sliding part of the linear slide rail pair (3); The first hydraulic cylinder (5) is vertically installed inside the support member (4), with its telescopic shaft facing upwards to support the workpiece; All of the first hydraulic cylinders (5) are arranged in series so that the supporting force on the workpiece is consistent.

2. The rotary support device for high-precision turntable bearing machining according to claim 1, characterized in that: The support member (4) has an upward extension (41) at its inner or outer end, and the extension (41) is provided with a second hydraulic cylinder (6). All the second hydraulic cylinders (6) are arranged in series so that the extrusion force on the workpiece is consistent.

3. The rotary support device for high-precision turntable bearing machining according to claim 2, characterized in that: The upper end of the extension (41) is provided with a horizontal bending part (42), and the horizontal bending part (42) is provided with a pressure head (7) for pressing down the workpiece.

4. The rotary support device for high-precision turntable bearing machining according to claim 1, characterized in that: The linear slide rail pair (3) includes a linear slide rail (31), a slider (32) is slidably connected to the top of the linear slide rail (31), and a transmission screw (33) is rotatably connected to the linear slide rail (31), and the transmission screw (33) and the slider (32) are driven together. The inner end of the transmission screw (33) is inserted into the power box (2) and meshes with the motor (21) inside the power box (2) through gears.

5. A rotary support device for high-precision turntable bearing machining according to claim 4, characterized in that: The inner end of the transmission screw (33) in all linear guide pairs (3) is engaged with the same motor (21) via gears.

6. The rotary support device for high-precision turntable bearing machining according to claim 1, characterized in that: The rotating base (1) is surrounded by a circular track (8) that is coaxial with it. The bottom of the linear slide rail pair (3) is provided with a support roller (34) that matches the circular track (8).

7. A rotary support device for high-precision turntable bearing machining according to claim 6, characterized in that: The support roller (34) is inclined to the circular track (8) to compensate for deviations caused by diameter differences.

Images