Linear rotary motion device with spindle position adjustment function

Abstract

The present invention provides a linear rotary motion device with a spindle position adjustment function, which is used to adjust the spindle position. The linear rotary motion device with a spindle position adjustment function includes a spindle clamp that surrounds the spindle and is fixed to the spindle, a drive assembly for driving the spindle clamp to move along the extension direction of the spindle, a static guide rail, and a plurality of oil pressure pads. The spindle clamp is provided with a plurality of inclined surfaces, the static guide rail is parallel to the plurality of inclined surfaces, and a plurality of oil pressure pads are supported between the static guide rail and the inclined surfaces. The plurality of oil pressure pads are independently controlled to generate an oil film between the static guide rail and the inclined surfaces. The present invention can adjust the spindle by setting the inclined surface and the plurality of oil pressure pads, thereby reducing the parallelism error of the spindle. In addition, the oil film can be formed by the oil pressure pad to reduce the friction between the spindle clamp and the static guide rail, so that the spindle clamp has a smooth sliding effect.

Description

Technical Field

[0001] The invention relates to a linear rotary motion device with a spindle position adjustment function. Background Art

[0002] With the rapid development of contemporary production technology, many high-tech products have higher and higher requirements for machining accuracy, especially for mechanical parts used in military, national defense, medical, optical and other fields, which have high precision requirements and complex shapes. As one of the most important executive components for achieving machine tool machining accuracy, the spindle (milling axis or grinding axis) has an important influence on machining accuracy in addition to its own rotation accuracy. During the machine tool debugging process, ensuring the coincidence of its axis with the target axis position is also one of the indispensable and important factors affecting the final machining accuracy. Especially in the machining process of internal and external cylindrical grinding equipment, the parallelism error of the grinding axis axis relative to the target axis in the horizontal and vertical planes will directly affect the roundness and cylindricity of the workpiece.

[0003] At the same time, as one of the important error sources affecting the accuracy of machine tools, the influence of Abbe error should be minimized in machine tool design. Due to the flipping, pitching and yaw of the guide rail itself, according to the Abbe error principle, the resulting error is proportional to the vertical distance from the guide rail to the spindle axis. The method currently used to adjust the axis position on grinding machine equipment is mainly through manual adjustment. The traditional manual adjustment method mainly uses a sleeve that is not concentric (eccentric) with the spindle axis to fix the spindle, and adjusts the relative position of the spindle axis and the target axis in the Y direction by manually rotating the sleeve. Manually adjusting the axis position requires a lot of time and manpower, which greatly increases the installation and debugging time of machine tool equipment. In addition, in the process of general machine tool operation, there are sometimes operating errors that cause the spindle to hit the workpiece, which causes the spindle axis to deviate from the target axis.

[0004] Manual adjustment can only achieve one degree of freedom adjustment of the spindle axis in the Y direction. The pitch adjustment of the spindle axis around the X-axis can only be guaranteed by the machining accuracy of the clamp itself and cannot be adjusted by other means.

[0005] In the traditional machine tool structure, since the positioning of the guide rail is based on the grating scale located on the same horizontal plane, there is a certain distance between the spindle axis and the guide rail axis in the vertical direction. The straightness error, roll, yaw and pitch generated by the guide rail in the vertical plane and the horizontal plane lead to the generation of Abbe error, which further affects the processing accuracy.

[0006] In view of this, it is necessary to improve the existing linear rotary motion device with a spindle position adjustment function to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a linear rotary motion device with a spindle position adjustment function to solve the problems of the prior art that manual spindle adjustment consumes manpower, increases installation and debugging time, and is inaccurate in adjustment.

[0008] To achieve the above-mentioned purpose, the present invention provides a linear rotary motion device with a spindle position adjustment function, which is used to adjust the spindle position. The linear rotary motion device with a spindle position adjustment function includes a spindle clamp that surrounds the spindle and is fixed to the spindle, a driving component for driving the spindle clamp to move along the extension direction of the spindle, a static guide rail, and a plurality of oil pressure pads. The spindle clamp is provided with a plurality of inclined surfaces, the static guide rail is parallel to the plurality of inclined surfaces, the plurality of oil pressure pads are supported between the static guide rail and the inclined surfaces, and the plurality of oil pressure pads are independently controlled to generate an oil film between the static guide rail and the inclined surfaces.

[0009] As a further improvement of the present invention, the number of the inclined surfaces is four, and the four inclined surfaces are respectively arranged on the upper and lower sides and the left and right sides of the main shaft.

[0010] As a further improvement of the present invention, the axis of the main shaft is located on the plane where the inclined surface is located or is parallel to the plane where the inclined surface is located.

[0011] As a further improvement of the present invention, the angles between the plurality of inclined surfaces and the vertical direction are the same.

[0012] As a further improvement of the present invention, the number of the oil pressure pads is eight, and two oil pressure pads are fixedly provided on each inclined surface along the extension direction of the main shaft.

[0013] As a further improvement of the present invention, the linear rotary motion device with a spindle position adjustment function comprises a main frame, and the drive assembly is fixed on the main frame.

[0014] As a further improvement of the present invention, the static guide rail is fixed on the main frame.

[0015] As a further improvement of the present invention, the number of the drive assemblies is two, and the two drive assemblies are arranged on the left and right sides of the spindle clamp.

[0016] As a further improvement of the present invention, the drive assembly includes a stator fixing seat fixed on the main frame, a stator magnetic rail fixedly connected to the stator fixing seat, a mover connecting piece and a mover coil, the stator magnetic rail is provided with an opening facing the spindle clamp, one end of the mover connecting piece is connected to both sides of the spindle clamp, and the mover coil is arranged at the other end and protrudes from the opening into the stator magnetic rail, and is spaced apart from the stator magnetic rail.

[0017] The beneficial effects of the present invention are as follows: the linear rotary motion device with spindle position adjustment function of the present invention can adjust the spindle by setting an inclined surface and a plurality of oil pressure pads, thereby reducing the parallelism error of the spindle, and can also form an oil film through the oil pressure pads to reduce the friction between the spindle clamp and the static guide rail, so that the spindle clamp has a stable sliding effect. The linear rotary motion device with spindle position adjustment function of the present invention improves the positioning accuracy of the spindle and the stability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the linear rotary motion device with a spindle position adjustment function of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the linear rotary motion device with spindle position adjustment function of the present invention without the main frame installed;

[0020] Figure 3 It is a side structural schematic diagram of the linear rotary motion device with a spindle position adjustment function of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 3 As shown, the linear rotary motion device 100 with a spindle position adjustment function of the present invention is used to adjust the position of the spindle 1. The linear rotary motion device 100 with a spindle position adjustment function includes a spindle clamp 2 that surrounds the spindle 1 and is fixed to the spindle 1, a driving component 3 that drives the spindle clamp 2 to move along the extension direction of the spindle 1, a static guide rail 4, a plurality of oil pressure pads 5 and a main frame 6.

[0023] The spindle clamp 2 is provided with a plurality of inclined surfaces 21, and the axis of the spindle 1 is located on the plane where the inclined surfaces 21 are located or is parallel to the plane where the inclined surfaces 21 are located. It should be noted that the plane where the inclined surfaces 21 are located intersects with the vertical plane and the horizontal plane.

[0024] In this embodiment, there are four inclined surfaces 21, which are arranged on the upper and lower sides and the left and right sides of the main shaft 1. The upper part of the main shaft clamp 2 is low in the middle and high on both sides. The inclined surface 21 located at the top extends upward from the middle to both sides. The main shaft clamp 2 is symmetrical in the upper and lower parts and in the left and right parts. Therefore, the angles between the multiple inclined surfaces 21 and the vertical direction are the same, which is easy to control.

[0025] In other embodiments, the spindle clamp 2 may be arranged to be high in the middle and low on both sides, so that the inclined surface 21 at the top extends downward from the middle to both sides, which can also achieve the purpose of the present invention.

[0026] The static guide rail 4 is parallel to the plurality of inclined surfaces 21 , and the plurality of oil pressure pads 5 are supported between the static guide rail 4 and the inclined surfaces 21 . The plurality of oil pressure pads 5 are independently controlled to generate an oil film between the static guide rail 4 and the inclined surfaces 21 .

[0027] In this embodiment, the number of the oil pressure pads 5 is eight, and two oil pressure pads 5 are fixedly provided on each inclined surface 21 along the extension direction of the main shaft 1. Each oil pressure pad 5 works independently and is adjusted. Specifically, the adjustment method is to supply oil to the oil pressure pad 5 and adjust the thickness of the oil pressure pad 5, so that displacement occurs in the direction perpendicular to the inclined surface 21. This displacement can be decomposed into the up-down direction and the left-right direction, and the position adjustment of the main shaft 1 is achieved in these two directions. And because two oil pressure pads 5 are provided on each inclined surface 21 in the front-to-back direction, and inclined surfaces 21 and oil pressure pads 5 are provided on the left and right sides of the main shaft 1, the yaw and pitch adjustment of the main shaft 1 can also be achieved.

[0028] Therefore, through 8 independently controlled pressure oil pressure pads 5, the main shaft 1 can realize precise adjustment of 4 degrees of freedom (up and down direction, left and right direction, pitch, and yaw) without the use of additional devices and tools, which greatly saves equipment debugging time and improves production efficiency.

[0029] The driving assembly 3 is fixed on the main frame 6. The main frame 6 surrounds the main shaft clamp 2 from four directions: up, down, left, and right.

[0030] In this embodiment, the number of the driving components 3 is two, and the two driving components 3 are arranged on the left and right sides of the spindle clamp 2. The driving component 3 includes a stator fixing seat 31 fixed on the main frame 6, a stator magnetic track 32 fixedly connected to the stator fixing seat 31, a mover connecting member 33 and a mover coil 34. The stator magnetic track 32 is provided with an opening facing the spindle clamp 2 and extends along the direction of the spindle 1. One end of the mover connecting member 33 is connected to both sides of the spindle clamp 2. The mover coil 34 is arranged at the other end and protrudes from the opening into the stator magnetic track 32, and is arranged at intervals from the stator magnetic track 32. The mover coil 34 and the stator magnetic track 32 interact with each other, so that the spindle clamp 2 can be controlled to move forward and backward along the extension direction of the spindle 1. The mover coil 34 and the stator magnetic track 32 are arranged at intervals, so that zero friction transmission can be achieved, so that the motion accuracy is improved.

[0031] The static guide rail 4 is fixed on the main frame 6. Hydraulic oil is passed through the eight hydraulic pads 5 to form an oil film on both sides of the hydraulic pads 5, separating the spindle clamp 2 and the static guide rail 4, so that there is no contact between the spindle clamp 2 and the static guide rail 4, so that the friction force of the spindle clamp 2 relative to the static guide rail 4 is close to zero, thereby ensuring that the spindle clamp 2 has a smooth sliding effect and improving the positioning accuracy and speed stability.

[0032] The linear rotary motion device 100 with a spindle position adjustment function of the present invention can adjust the spindle 1 by setting an inclined surface 21 and a plurality of oil pressure pads 5, thereby reducing the parallelism error of the spindle 1. In addition, an oil film can be formed by the oil pressure pads 5 to reduce the friction between the spindle clamp 2 and the static guide rail 4, so that the spindle clamp 2 has a stable sliding effect. The linear rotary motion device 100 with a spindle position adjustment function of the present invention improves the positioning accuracy of the spindle 1 and the stability of operation.

[0033] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A linear rotary motion device with a spindle position adjustment function, used to adjust the spindle position, characterized in that: The linear rotary motion device with spindle position adjustment function includes a spindle clamp surrounding the spindle and fixed to the spindle, a driving component for driving the spindle clamp to move along the extension direction of the spindle, a static guide rail, and multiple oil pressure pads. The number of the driving components is two, and the two driving components are arranged on the left and right sides of the spindle clamp. The spindle clamp is provided with multiple inclined surfaces, the static guide rail is parallel to the multiple inclined surfaces, and the multiple oil pressure pads are supported between the static guide rail and the inclined surfaces. The multiple oil pressure pads are independently controlled to generate an oil film between the static guide rail and the inclined surfaces. Two oil pressure pads are fixedly provided on each inclined surface along the extension direction of the spindle. By supplying oil to the oil pressure pads and adjusting the thickness of the oil pressure pads, the spindle can be adjusted in the up and down directions, left and right directions, yaw and pitch.

2. The linear rotary motion device with spindle position adjustment function according to claim 1, characterized in that: The number of the inclined surfaces is four, and the four inclined surfaces are respectively arranged on the upper and lower sides and the left and right sides of the main shaft.

3. The linear rotary motion device with spindle position adjustment function according to claim 2, characterized in that: The axis of the main shaft is located on the plane where the inclined surface is located or is parallel to the plane where the inclined surface is located.

4. The linear rotary motion device with spindle position adjustment function according to claim 3, characterized in that: The angles between the plurality of inclined surfaces and the vertical direction are the same.

5. The linear rotary motion device with spindle position adjustment function according to claim 3, characterized in that: The number of the oil pressure pads is eight.

6. The linear rotary motion device with spindle position adjustment function according to claim 1, characterized in that: The linear rotary motion device with a spindle position adjustment function also includes a main frame, and the drive assembly is fixed on the main frame.

7. The linear rotary motion device with spindle position adjustment function according to claim 6, characterized in that: The static guide rail is fixed on the main frame.

8. The linear rotary motion device with spindle position adjustment function according to claim 7, characterized in that: The driving assembly includes a stator fixing seat fixed on the main frame, a stator magnetic rail fixedly connected to the stator fixing seat, a mover connecting piece and a mover coil. The stator magnetic rail is provided with an opening facing the spindle clamp, one end of the mover connecting piece is connected to both sides of the spindle clamp, and the mover coil is arranged at the other end and protrudes from the opening into the stator magnetic rail, and is spaced apart from the stator magnetic rail.

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