阅读说明：本技术 一种外圆柱面研抛装置及使用方法 (Outer cylindrical surface polishing device and using method ) 是由 凌四营 赵昌明 孔玉梅 凌明 杨洋 于 2021-09-26 设计创作，主要内容包括：本发明提供一种外圆柱面研抛装置及使用方法,属于精密加工技术领域。本发明结构简单,可配合不同轴系实现轴类零件或盘类零件外圆柱面的精密研抛,可同时加工一个或多个同尺寸工件。符合圆柱表面的成型原理,既：母线绕固定轴线回转。可加工任意尺寸外圆柱面,且加工过程中无需进刀,利用工件的弹性变形实现自动连续的微量进刀,即可完成研抛工艺。该装置仅对精密油石的工作面有直线度要求,夹具体的平面度、垂直度、平行度等对于研抛过程影响不大。油石不与夹具体直接接触,避免因夹紧力过大损坏油石。采用本装置研抛后的工件,圆度误差可达到亚微米量级,粗糙度可达到几十纳米量级,且具有成本低廉,操作简单,调整方便等优点,具有重要的推广应用价值。(The invention provides a grinding and polishing device for an outer cylindrical surface and a using method thereof, belonging to the technical field of precision machining. The invention has simple structure, can be matched with different shafting to realize the precise grinding and polishing of the outer cylindrical surface of the shaft part or the disc part, and can simultaneously process one or more workpieces with the same size. The forming principle of the cylindrical surface is met, namely: the bus bar revolves around a fixed axis. The outer cylindrical surface with any size can be processed, feed is not needed in the processing process, automatic continuous micro feed is realized by utilizing the elastic deformation of a workpiece, and the grinding and polishing process can be completed. The device only has the straightness accuracy requirement to the working face of accurate oilstone, and the flatness, the straightness accuracy, the depth of parallelism etc. of anchor clamps are little to the process of lapping and throwing. The oilstone is not in direct contact with the clamp body, so that damage to the oilstone due to overlarge clamping force is avoided. The roundness error of a workpiece ground and polished by the device can reach submicron level, the roughness can reach dozens of nanometers level, and the device has the advantages of low cost, simple operation, convenient adjustment and the like, and has important popularization and application values.)

1. The outer cylindrical surface grinding and polishing device is characterized by comprising a clamp body (1), a precise oilstone (2), a gasket (3), a locking screw (4) and an adjusting screw (5); the precise oilstone (2) is arranged in a precise oilstone rectangular groove (1-1) of the fixture body (1), a gasket (3) is arranged at the contact part of the precise oilstone (2) and the groove surface, and the precise oilstone is locked by a locking screw (4) and an adjusting screw (5); the precision oilstone (2) is of a square structure and comprises a positioning surface A (2-1), a clamping surface B (2-2), an adjusting surface C (2-3) and a working surface D (2-4), wherein the positioning surface A (2-1) and the clamping surface B (2-2) are arranged oppositely, and the adjusting surface C (2-3) and the working surface D (2-4) are arranged oppositely;

the clamp body (1) is of a bilateral symmetry structure and comprises a precise oilstone rectangular groove (1-1), a clamping end (1-2), a locking threaded hole (1-3) and an adjusting threaded hole (1-4), wherein the locking threaded hole and the adjusting threaded hole are formed in the precise oilstone rectangular groove (1-1); specifically, the method comprises the following steps: the locking threaded holes (1-3) are formed in the top surface of the groove chamber and used for clamping oilstones, the locking threaded holes are arranged side by side in the axis direction, and the number of each side is not less than two; the adjusting threaded holes (1-4) are formed in the side face direction of the groove chamber and used for adjusting postures, and the adjusting threaded holes (1-4) are located at positions, close to two ends, of the fixture body (1) and are symmetrically arranged relative to the clamping ends (1-2); the tail of the clamp body (1) is provided with a cylindrical clamping end (1-2) for turning and assembling a clamping mechanism.

2. An outer cylindrical surface grinding and polishing device as claimed in claim 1, characterized in that, on the basis of precision oilstones, the working surface D (2-4) is used for grinding process when no material is stuck on the surface; when the soft elastic or viscoelastic material is adhered to the surface of the working surface (2-3), the polishing process is used.

3. An outer cylindrical surface lapping and polishing device according to claim 1 or 2, characterized in that the straightness error of the working surface D (2-4) of the precision oilstone (2) is not more than 1 μm.

4. An outer cylindrical surface grinding and polishing device according to claim 1 or 2, characterized in that the sizes of the clamp body (1) and the precision oilstone (2) are determined according to the size of a workpiece to be processed; the processing tool can be used for processing shaft parts and disc parts, and can process one workpiece at a time and simultaneously process a plurality of workpieces with the same size.

5. A method for using a grinding and polishing device of an external cylindrical surface as claimed in any one of claims (1-4), characterized in that the grinding and polishing device can grind and polish or grind and polish simultaneously when in use; the method comprises the following steps:

firstly, grinding and polishing the assembled outer cylindrical surface

1) Before assembly, carrying out refinement pretreatment on a working surface D (2-4) of the precision oilstone (2);

2) the bottom surface of the precise oilstone rectangular groove (1-1) of the fixture body 3 is refined by utilizing the refined precise oilstone (2), so that certain flatness is ensured;

3) sequentially arranging a gasket (3) and a precise oilstone (2) into a precise oilstone rectangular groove (1-1) to ensure that the gasket (3) is contacted with the side surface and the top surface of a groove chamber, wherein a precise oilstone positioning surface A (2-1) is tightly attached to the bottom surface of the groove chamber, a clamping surface B (2-2) is tightly attached to a top gasket, and an adjusting surface C (2-3) is tightly attached to a side gasket; the locking screw (4) and the adjusting screw (5) are respectively inserted into the locking threaded hole (1-3) and the adjusting threaded hole (1-4), the locking screw (4) is used for fixing the gasket (3) but is not locked, and the adjusting screw (5) is guaranteed to have fine adjustment allowance; the purpose of placing the gasket (3) in the precision oilstone rectangular groove (1-1) is to prevent the precision oilstone (2) from being damaged by direct contact with the locking screw (4) and the adjusting screw (5);

4) connecting a tail clamping end (1-2) of the clamp body (1) with a clamping mechanism, installing the tail clamping end near a processed workpiece, and adjusting the clamping mechanism to a proper position to enable a working surface D (2-4) to be tightly attached to the processed workpiece;

secondly, the working surface of the precise oilstone (2) is precisely adjusted, the adjusting screw (5) is finely adjusted to a proper position, and the locking screw (4) is compressed;

if the machined workpiece has no taper error, adjusting the posture of the precise oilstone by taking the bus of the machined workpiece as a reference, and judging by using an optical gap method; roughly adjusting the clamping mechanism to ensure that the working surface D (2-4) of the precision oilstone (2) is contacted with the surface of the workpiece; a light source is provided for observation by a light gap method by using a variable wavelength LED lamp, adjusting screws (5) at two sides of the fixture body (1) are finely adjusted until a light-tight source is arranged at the contact position of the precision oilstone working surface D and the surface of the workpiece, and the locking screws (4) are pressed after the adjustment is finished;

if the machined workpiece has a taper error, adjusting the posture of the precise oilstone by taking the central axis of the machined workpiece as a reference, and judging by using a measuring method; roughly adjusting the clamping mechanism to ensure that the precision oilstone working surface D (2-4) is contacted with the surface of the workpiece; detecting the taper of the processed workpiece by using a precision instrument, placing a right-angle knife edge ruler at the contact position of the taper high point position and an oilstone working surface D (2-4), finely adjusting screws (5) at two sides of a clamp body until the oilstone working surface D (2-4) is vertical to the end surface of the taper high point position of the processed workpiece, and compressing a locking screw (4) after the adjustment is finished;

thirdly, the working process is as follows:

1) when no material is stuck on the clamping surface of the precise oilstone (2) in all the outer cylindrical surface polishing devices, finishing the grinding work;

2) when all the outer cylindrical surface grinding and polishing devices have the precision oilstone (2) which is not adhered with any material and is also adhered with a polishing material on the surface, grinding and polishing are carried out simultaneously, and transition work is completed:

3) and in all the outer cylindrical surface polishing devices, polishing work is finished when polishing materials are adhered to the clamping surface of the precision oilstone (2).

6. The use method of the outer cylindrical surface polishing device according to claim 5, characterized in that the first step 1) is specifically: during pretreatment, 3 sets of precise oilstones are matched, and working surfaces D (2-4) of the precise oilstones are ground mutually to ensure that the straightness error is in a submicron order; the surface of the precision oilstone (2) is not smooth and is used for ensuring the polishing effect.

7. The use method of the outer cylindrical surface polishing device according to claim 5, characterized in that the outer cylindrical surface polishing device is used for precision machining, and the roundness error and the circle jump error of the machined workpiece after the previous working procedure are not more than 2 μm.

8. The use method of the outer cylindrical surface grinding and polishing device as claimed in claim 5, characterized in that two or more sets of annular arrays of the grinding and polishing device are arranged on the periphery of the workpiece to be processed, and the multiple sets of devices work simultaneously, so that the workpiece is stressed uniformly.

Technical Field

The invention belongs to the technical field of precision machining, and relates to a grinding and polishing machining device for an outer cylindrical surface of a part and a using method.

Background

Grinding and polishing are classical ultra-precision machining techniques and are widely used for surface finishing of metal parts, optical elements and engineering ceramics. The processing damage caused by the previous procedure can be effectively removed through grinding and polishing, and the ultra-smooth and damage-free workpiece surface is obtained.

Polishing is a method in which a polishing liquid is applied to a polishing tool and a small amount of machining is performed by relative movement between the polishing tool and a workpiece. Wherein the grinding tool is a hard tool with certain rigidity. The abrasive removes a small amount of material from the surface of the workpiece, thereby obtaining a smooth finish surface with good dimensional accuracy. The grinding process can be divided into dry grinding and wet grinding according to the presence or absence of the grinding fluid during grinding.

Polishing is generally not done with dimensional accuracy and workpiece shape accuracy, primarily to obtain smooth or even mirror surfaces. The principle of polishing is basically the same as grinding, but the selected abrasive particles are relatively small, and generally, fine abrasive particles with the diameter less than 1 μm are used. The polishing pad is generally made of a soft elastic or viscoelastic material (including a polymer material, pitch, paraffin, rosin, etc.) rotating at a low speed, and a low elastic material (artificial leather, cotton cloth, felt, etc.) rotating at a high speed may be used as the polishing pad. Grinding and polishing are two processes of ultra-precision processing of a workpiece, which are collectively called polishing and grinding, and are not separable.

At present, the grinding processing of the outer cylindrical surface is mostly finished on a centerless ultra-precision grinding machine. The oilstone is clamped on the oilstone frame and consists of a clamping sheet, a jacking screw and a locking screw, and the installation and debugging of the oilstone are extremely inconvenient; the grinding machine is easy to clamp the oilstone, and the roundness error, straightness error, roughness and the like of the ground workpiece are extremely large; when the oilstone is clamped, the clamping force of the clamping screw is too large, and the oilstone is easy to be clamped and broken, so that the oilstone is wasted. In addition, the centerless ultra-precision grinding machine has a complex structure and is expensive.

Disclosure of Invention

The invention provides a disc part outer cylindrical surface grinding and polishing device and a using method thereof, aiming at solving the problem of the conventional centerless ultra-precision grinding machine.

In order to achieve the purpose, the invention adopts the technical scheme that:

a grinding and polishing device for the outer cylindrical surface of a part comprises a clamp body 1, a precise oilstone 2, a gasket 3, a locking screw 4 and an adjusting screw 5. The precise oilstone 2 is arranged in a precise oilstone rectangular groove 1-1 of the fixture body 1, and a gasket 3 is arranged at the contact part of the precise oilstone 2 and the groove surface and is locked through a locking screw 4 and an adjusting screw 5. The precision oilstone 2 is of a square structure and comprises a positioning surface A2-1, a clamping surface B2-2, an adjusting surface C2-3 and a working surface D2-4, wherein the positioning surface A2-1 and the clamping surface B2-2 are oppositely arranged, and the adjusting surface C2-3 and the working surface D2-4 are oppositely arranged. On the basis of the precise oilstone, the surface of the working surface D2-4 is not adhered with any material and is used for a grinding process; the working surface 2-3 is adhered with soft elastic or viscoelastic material (asphalt, rosin, artificial leather, felt, etc.) for polishing.

The clamp body 1 is of a bilateral symmetry structure and comprises a precise oilstone rectangular groove 1-1, a clamping end 1-2, a locking threaded hole 1-3 and an adjusting threaded hole 1-4, wherein the locking threaded hole 1-3 and the adjusting threaded hole are formed in the precise oilstone rectangular groove 1-1. Specifically, the method comprises the following steps: the locking threaded holes 1-3 are formed in the top surface of the groove chamber and used for clamping oilstones, the locking threaded holes are arranged side by side in the axis direction, and the number of each side is not less than two; the adjusting threaded holes 1-4 are formed in the side face direction of the groove chamber and used for posture adjustment, and the adjusting threaded holes 1-4 are located at positions, close to two ends, of the fixture body 1 and are symmetrically arranged relative to the clamping ends 1-2; the tail of the clamp body 1 is provided with a cylindrical clamping end 1-2 which is used for assembling a clamping mechanism through turning.

Furthermore, the top surface and the bottom surface of the clamp body 1 can be provided with weight reduction grooves for reducing materials and removing weights.

Furthermore, the straightness error of the D2-4 working surface of the precision oilstone 2 is not more than 1 μm.

Further, the sizes of the fixture body 1 and the precision oilstone 2 are determined according to the size of the workpiece to be processed. The width of the precision oilstone 2 is slightly larger than the whole width of the workpiece by about 10 percent. Therefore, the device can be used for processing shaft parts and disc parts, can process one workpiece at a time and simultaneously process a plurality of workpieces with the same size, and has a larger processing range.

When the use method of the grinding and polishing device with the outer cylindrical surface is used, two or more sets of annular arrays of the grinding and polishing device are arranged at the periphery of a processed workpiece, and the multiple sets of devices work simultaneously, so that the workpiece is stressed uniformly, and the phenomena of eccentricity and the like are avoided; the grinding and polishing can be carried out, and the grinding and polishing can also be carried out simultaneously. The method specifically comprises the following steps:

first, grinding and polishing the assembled outer cylindrical surface

1) The precision oilstone 2 is pre-treated prior to assembly.

The device is used for precision machining, so the precision requirement on the working surface D2-4 of the precision oilstone 2 is very high. During pretreatment, 3 sets of precision oilstones are matched, and the working surfaces D2-4 of the precision oilstones are ground mutually to ensure that the straightness error is in a submicron order. The precision oilstone 2 also needs to have the surface roughness Ra value not less than 0.05 mu m so as to ensure the polishing effect;

2) the bottom surfaces of the rectangular grooves 1-1 of the precise oilstones of the fixture body 3 are refined by utilizing the refined precise oilstones 2, so that certain flatness of the fixture body is ensured, namely, certain positioning precision and rigidity of the fixture body are ensured;

3) sequentially arranging a gasket 3 and a precision oilstone 2 in a precision oilstone rectangular groove 1-1 to ensure that the gasket 3 is contacted with the side surface and the top surface of a groove chamber, wherein a precision oilstone positioning surface A2-1 is tightly attached to the bottom surface of the groove chamber, a clamping surface B2-2 is tightly attached to a top gasket, and an adjusting surface C2-3 is tightly attached to the side gasket; the locking screw 4 and the adjusting screw 5 are respectively inserted into the locking threaded holes 1-3 and the adjusting threaded holes 1-4, the locking screw 4 is used for fixing the gasket 3 but not locking, and fine adjustment allowance of the adjusting screw 5 is guaranteed. The purpose of placing the gasket 3 in the precision oilstone rectangular groove 1-1 is to prevent the precision oilstone 2 from being damaged due to direct contact with the locking screw 4 and the adjusting screw 5;

4) connecting a clamping end 1-2 at the tail part of the clamp body 1 with a clamping mechanism, installing the clamping mechanism near a processed workpiece, and adjusting the clamping mechanism to a proper position to enable a working surface D2-4 to be tightly attached to the processed workpiece;

and secondly, precisely adjusting the working surface of the precise oilstone 2, finely adjusting the adjusting screw 5 to a proper position, and pressing the locking screw 4.

If the machined workpiece has no taper error, the precision oilstone posture is adjusted by taking the bus of the machined workpiece as a reference, and the judgment is carried out by utilizing an optical gap method. And the clamping mechanism is roughly adjusted to ensure that the working surface D2-4 of the precision oilstone 2 is contacted with the surface of the workpiece. A light source is provided for observation by using a light gap method through a variable wavelength LED lamp, the adjusting screws 5 on two sides of the clamp body 1 are finely adjusted until the light-tight source is arranged at the contact position of the precision oilstone working surface D and the surface of the workpiece, and the locking screws 4 are pressed after the adjustment is finished.

If the machined workpiece has a taper error, the attitude of the precise oilstone is adjusted by taking the central axis of the machined workpiece as a reference, and the precision oilstone is judged by a measuring method. And the clamping mechanism is roughly adjusted to ensure that the precision oilstone working surface D2-4 is contacted with the surface of the workpiece. The taper of the workpiece to be processed is detected by using a precision instrument, a right-angle knife edge ruler is placed at the contact position of the taper high point position and the oilstone working surface D2-4, the adjusting screws 5 on the two sides of the clamp body are finely adjusted until the oilstone working surface D2-4 is vertical to the end surface of the taper high point position of the workpiece to be processed, and the locking screws 4 are compressed after the adjustment is finished.

Thirdly, the working process is as follows:

1) when no material is stuck on the clamping surface of the precise oilstone 2 in all the outer cylindrical surface polishing devices, finishing the grinding work;

2) when all the outer cylindrical surface grinding and polishing devices have the precision oilstone 2 which is not adhered with any material and is also adhered with a polishing material on the surface, grinding and polishing are carried out simultaneously, and transition work is completed:

3) and in all the outer cylindrical surface polishing devices, polishing work is finished when polishing materials are adhered to the clamping surface of the precision oilstone 2. In the processing process, feeding is not needed, automatic continuous micro-feeding is realized by using the elastic deformation of the workpiece, and the grinding and polishing process can be completed.

Furthermore, the outer cylindrical surface polishing device is used for precision machining, and the roundness error and the circle jump error of the machined workpiece are not more than 2 microns after the workpiece is machined in the previous working procedure.

The invention has the beneficial effects that: the device has simple structure, can be matched with different shafting to realize the precise grinding and polishing of the outer cylindrical surface of the shaft part or the disc part, and can simultaneously process one or more workpieces with the same size. The forming principle of the cylindrical surface is met, namely: the bus bar revolves around a fixed axis. The outer cylindrical surface with any size can be processed, feed is not needed in the processing process, automatic continuous micro feed is realized by utilizing the elastic deformation of a workpiece, and the grinding and polishing process can be completed. The device only has the straightness accuracy requirement to the working face of accurate oilstone, and the flatness, the straightness accuracy, the depth of parallelism etc. of anchor clamps are little to the process of lapping and throwing. The oilstone is not in direct contact with the clamp body, so that damage to the oilstone due to overlarge clamping force is avoided. The roundness error of a workpiece ground and polished by the device can reach submicron level, the roughness can reach dozens of nanometers level, and the device has the advantages of low cost, simple operation, convenient adjustment and the like, and has important popularization and application values.

Drawings

FIG. 1 is a schematic view of the polishing device with an outer cylindrical surface.

Fig. 2 is a schematic view of the clamp.

FIG. 3 is a schematic view of a precision oilstone.

Fig. 4 is an example of grinding the outer cylindrical surface of the base disc.

FIG. 5 is a top view of the grinding of the outer cylindrical surface of the base disk.

In the figure: 1, a fixture body; 1-1 precision rectangular oilstone groove; 1-2 clamping ends; 1-3 locking the threaded hole; 1-4 adjusting the threaded hole; 2 precision oilstone; 2-1, positioning surface A; 2-2, a clamping surface B; 2-3 adjusting the surface C; 2-4, working surface D; 3, a copper gasket; 4 locking the screw; 5 adjusting the screw; 6, universal magnetic gauge stand; 7, a cast iron base; 8, an asymmetric V-shaped block; 9 supporting a shaft system; a 10-base disc; 11 d.c. motor.

Detailed Description

The specific implementation method of the invention is illustrated by taking the grinding of the outer cylindrical surface of a base disc with the diameter of 240mm as an example. The base disc is used for generating the base level involute, so the roundness requirement of the base disc is very high, and the base disc is generally expected to reach submicron or even nanometer level. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The universal magnetic gauge stand has the advantages of good rigidity, convenient use, clamping at any position, revolving head, fine adjustment of the head and the like, so the universal magnetic gauge stand 6 is selected as a clamping mechanism of the fixture body 1. The cast iron bottom plate 7 is convenient for installation of the magnetic gauge stand, the asymmetric V-shaped block 8 is used as a support of the shaft system 9, the asymmetric V-shaped block 8 is positioned, and the bolts are clamped tightly. The motor drives the main shaft to drive the parts to rotate synchronously. In this example, the precision oilstone 2 is selected as a high-precision silicon carbide oilstone, and no material is stuck on the surface of the oilstone, and the pair of base disks are simultaneously ground in a machining state.

Before grinding, the following pre-treatment is carried out:

and (3) pretreating the precision oilstone 2. The precision oilstone 2 is designed and processed according to the size of the base disc, and the width of a working surface D2-4 of the precision oilstone 2 is slightly larger than the total axial width of the base disc to be processed by 10%. The straightness requirement of the oilstone working surface D2-4 is very high, and the straightness is more than submicron. Therefore, three sets of oilstones are ground in pair to ensure the requirement on the straightness of the working surface D. In order to ensure the grinding effect of the precision oilstone 2, the roughness Ra of the precision oilstone 2 is required to be 0.05 μm.

And (4) pretreating the base disc. The grinding and polishing are ultra-precision machining, so the previous procedure needs to ensure that 2 mu m roundness machining allowance is reserved for grinding. The end face of the base disc is positioned with the shaft shoulder of the main shaft, and the axial positioning reference is guaranteed. Therefore, the end face of the base disc is ground, the error of the flatness of the end face is guaranteed to be 1 mu m, the error of the parallelism of the end faces at two sides is not more than 1 mu m, and the deflection error of the end face relative to the inner hole is 0.3 mu m.

A dense ball shaft sleeve is placed in an inner hole of the base disc and assembled to a shaft shoulder of the main shaft, the dense ball shaft sleeve guarantees a radial positioning reference, and a flat washer, a cross washer and a locking nut are sequentially assembled and positioned and clamped. The shaft ends at the two sides are assembled with a ball sealing shaft sleeve and a shaft sleeve, and then the ball sealing shaft sleeve and the shaft sleeve are placed on the asymmetric V-shaped block 8 for positioning and are clamped by bolts. And the coupling is connected with the direct current motor 11 to drive the main shaft to rotate.

The copper gasket 3 and the precision oilstone 2 are sequentially placed in the precision oilstone rectangular groove 1-1, the copper gasket 3 is ensured to be contacted with the side surface and the top surface of the groove chamber, the positioning surface A2-1 of the precision oilstone 2 is tightly attached to the bottom surface of the groove chamber, the clamping surface B2-2 is tightly attached to the top copper gasket, and the adjusting surface C2-3 is tightly attached to the side copper gasket. The clamping ends 1-2 are provided with a meter clamp of a universal magnetic meter seat 6, the magnetic meter seat is adsorbed on a cast iron bottom plate 7 to be fixed, and a universal support arm is adjusted to be fixed at a proper position, so that the precision oilstone 2 is basically attached to the base disc 10. The present embodiment adopts two sets of devices, and two sides of the shaft system are installed in a mirror image mode, so that the uniform stress of the base circular disc is ensured.

And (3) precisely adjusting the working surface of the precise oilstone 2: and if the position of the oilstone is precisely adjusted by taking the base disc bus as a reference, judging by adopting an optical gap method. A variable wavelength LED lamp is used as a light source, a universal magnetic gauge stand 6 support arm gauge clamp knob is finely adjusted, and oilstone pitching is adjusted; and (3) finely adjusting the adjusting screw 5, and adjusting the posture of the precision oilstone 2 to ensure that the working surface D2-4 of the precision oilstone 2 is tightly attached to the base disc 10, so that the locking screw 4 is pressed when the oilstone 2 is adjusted completely without light transmission lines. And if the position of the oilstone is precisely adjusted by taking the central axis of the base disc as a reference, a measuring method is adopted. The taper of the base disc 10 is detected by an inductance micrometer, a right-angle knife edge ruler is placed at the contact position of the high point position of the taper of the base disc and the working surface D of the oilstone 2, the adjusting screw 5 is finely adjusted until the working surface D is perpendicular to the end surface of the high point position of the taper of the base disc 10, and the locking screw 4 is compressed after the adjustment is finished.

After the adjustment is finished, the motor is driven, and the shaft system drives the base disc 10 to rotate and grind. In the processing process, the continuous grinding can be finished by means of the elastic deformation of the base disc without feeding. And after grinding is finished, sticking wool felt on the surface of the oilstone working surface D2-4, and repeating the steps to finish polishing of the outer cylindrical surface. After polishing, the roundness error of the part can reach submicron level, and the roughness can reach dozens of nanometers.

The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the invention patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.