CN115122223A - Rotary polishing and grinding floating tool for machining surfaces of ferrule parts - Google Patents

Abstract

The invention belongs to the technical field of finishing processing, in particular to a rotary polishing and grinding floating tool for processing the surface of a ferrule part, which solves the technical problems in the background technology and comprises a processing container, a lower connecting disc, an upper connecting disc and at least three supporting rods, wherein the processing container comprises a processing bin and a sealing cover which are detachably connected, the lower connecting disc is fixedly connected to the center of the bottom wall of the processing bin, the upper connecting disc is fixedly connected to the center of the inner wall of the sealing cover, two ends of the supporting rods are respectively detachably and vertically connected to the upper connecting disc and the lower connecting disc, all the supporting rods are uniformly distributed on a circumference which takes the center of the bottom wall of the processing bin as the center of a circle, ferrules to be processed are sleeved outside all the supporting rods, and the radius of the ferrules is larger than that of the circumference where the supporting rods are located; the processing container is filled with polishing and grinding processing medium. Utilize the frock adds man-hour to the part, and the material volume of getting rid of is less, improves its surface quality on the basis of guaranteeing the original precision of lasso part, can realize the processing of shape in coordination polishing.

Description

A rotary polishing floating tool for surface machining of ferrule parts

technical field

The invention belongs to the technical field of finishing processing, in particular to a rotary polishing floating tool used for surface processing of ferrule parts.

Background technique

Aero-engines are used in extreme environments of high temperature, high pressure and high speed, but they still need to ensure their reliable operating performance and service life. As the joint of the aero-engine rotor system, the main shaft bearing undertakes the mission of the normal operation of the whole machine. As a kind of main bearing parts, the surface quality of the ferrule directly affects the running performance and life of the engine. The currently used ferrule finishing methods include on-line electrolytic grinding technology, electrochemical grinding, double electrolytic grinding, and abrasive flow polishing based on the dielectrophoresis effect, etc. These processes have their own advantages and disadvantages. However, they all process a certain simple and regular surface of the part, such as the inner surface, outer surface or raceway, and cannot realize the integral shape co-processing of each surface of the part.

As a typical, commonly used and effective surface integrity manufacturing process, barrel finishing can comprehensively improve multiple indicators that affect the surface integrity of parts while maintaining accuracy. China Aviation Development Harbin Bearing Co., Ltd. proposed a method of smoothing the inner and outer surfaces of the bearing rings by using the swirl rolling process (CN202011607714.0). Carry out fixed clamping. However, the fixed clamping will leave traces on the surface, and there are problems such as poor processing uniformity of the inner surface of the outer ring and failure of the residual compressive stress to meet the standard. Therefore, there is an urgent need for a tooling device and method that can realize damage-free clamping of large and medium-sized ferrule parts, so as to achieve uniform and uniform polishing of large and medium-sized ferrule parts without damage, and improve the surface integrity of each surface of the ferrule. .

SUMMARY OF THE INVENTION

The invention aims to solve the technical problems such as poor processing uniformity and failure of residual compressive stress to reach the standard due to the fact that the ferrule usually needs to be fixed and clamped when the inner and outer surfaces of the bearing ferrule are smoothed in the current rolling grinding process, which will leave traces on the surface of the ferrule. , which provides a rotary polishing and floating tool for surface processing of ferrule parts.

The technical means adopted by the present invention to solve the technical problem are: a rotary polishing floating tool for surface processing of ferrule parts, comprising a processing container, a lower connecting plate, an upper connecting plate and at least three support rods, and the processing container includes The processing chamber and the cover are detachably connected. The lower connecting plate is fixed to the center of the bottom wall of the processing chamber, and the upper connecting plate is fixed to the center of the inner wall of the cover. The center of the bottom wall of the processing chamber and the center of the cover are both floating. On the axis of rotation of the tooling, the two ends of the support rod are detachable and vertically connected to the upper connecting plate and the lower connecting plate, and all the support rods are evenly distributed on the circumference with the center of the bottom wall of the processing bin as the center, and the ferrule to be processed is sleeved on the All support rods are external and the inner diameter of the ferrule is greater than the radius of the circumference where the support rods are located; the processing vessel is filled with a polishing processing medium. Hang the ferrule to be processed on all the support rods, because the radius of the ferrule is larger than the radius of the circumference of the support rod, so the floating clamping of the ferrule is realized by the single-sided constraint of several support rods. When the support rod rotates with the processing container , the ferrule realizes continuous rotary motion through friction with the support rod. During processing, the polishing medium is loaded into the processing container, and the polishing medium produces a certain relative motion and force on the surface of the ferrule with the movement of the container, so as to achieve the purpose of one-time finishing of the surfaces of the ferrule parts. The present invention can be used for processing large and medium-sized ferrules, and the polishing method has a small amount of material removed, which can ensure the original precision of ferrule-like parts while improving the surface performance, and realize the synergistic polishing process of shape and shape. In actual use, the floating tooling is in a vertical state, in which the rear end of the floating tooling is the bottom wall of the processing chamber, the front end of the floating tooling is where the cover is located, the lower connecting plate is located on the back side, and the upper connecting plate is located on the back side. On the front side, when the processing container is stationary, the ferrule is positioned in the vertical direction as a whole, and the ferrule is suspended on two upper support rods. The inner middle plane of the processing container is the reference plane, the axis of rotation of the floating tooling is the X axis, and the intersection of the reference plane and the axis of rotation is the origin O, and the XYZ rectangular coordinate system is established on the processing container, and the processing container can realize forward and reverse rotation around the X axis. In order to prevent the polishing medium from sticking to the ferrule and leaving scratches on the surface of the ferrule during the polishing process, two wedge angles are cut on the cylindrical surface of the support rod.

The method of using a rotary polishing floating tool for surface processing of ferrule parts according to the present invention is as follows:

S1. First, fix the lower limit bar on the lower connecting plate with screws, and connect the bottom ends of all support rods with the lower connecting plate to form a lower connecting piece, and install the lower connecting piece on the center of the bottom wall of the processing bin;

S2, hang the ferrule to be processed on the support rod;

S3. Fix the upper limit bar on the upper connecting plate with screws, and then connect the upper connecting plate and the top of the support rod with screws;

S4. Load the polishing medium into the processing bin, and the filling amount of the polishing medium is 50%-80% of the volume of the processing container;

S5. Install two O-shaped rubber sealing rings in the two annular edge grooves on the upper end face of the processing bin and the cover, and then close the cover;

S6, fix the rotary polishing floating tool on the motor through the connecting piece, rotate clockwise around the rotary axis at the speed n1, and the processing time is _{t1 ;}

S7, then rotate counterclockwise around the axis of rotation at the rotational speed n ₂ , and the processing time is t ₂ ;

S8. Repeat the processing steps _S6 to S7 until the finishing process of the ferrule is completed _;

S9. Remove the cover and the upper connecting plate, and then remove the ferrule from the support rod.

Preferably, both the upper connecting plate and the lower connecting plate are circular ring plates, and the circle centers of the upper connecting plate and the lower connecting plate are located on the axis of rotation of the floating tooling, which is to stabilize the center of rotation; The upper limit bars on the radial direction of the connecting plate are evenly distributed along the circumference of the upper connecting plate; the lower connecting plate is connected with at least three lower limit bars located on the radial direction of the lower connecting plate, and the lower limit bars are along the circumference of the lower connecting plate. The upper and lower limit bars on the upper and lower connecting plates can limit the horizontal polishing range of the ferrule, and the upper and lower limit bars can also prevent the ferrule from directly hitting the inner wall of the processing vessel. , the horizontal limit of the ferrule can be achieved through several upper limit bars and lower limit bars.

Preferably, the upper limit bar and the lower limit bar are both semi-cylindrical strip structures with the same structure and size, and the straight side walls of the upper limit bar and the lower limit bar are in close contact with the upper connection plate and the lower connection plate respectively. The cylindrical surfaces of the upper limit bar and the lower limit bar face the ferrule to be processed, so as to prevent the ferrule to be processed from being damaged or stuck during rotation, which affects the final processing effect.

Preferably, the inner cavity of the processing container is coated with a soft elastic adhesive layer, the axial distance between the lower connecting plate and the upper connecting plate in the processing chamber is L, L=B+2a+2b, B is the thickness of the ferrule to be processed, a is the radius of the upper limit bar or lower limit bar, b is the distance between the two end faces of the ferrule to be processed and the corresponding upper limit bar or lower limit bar, and the minimum value range of b is controlled between 30-60mm . This setting meets the processing requirements. The soft elastic adhesion layer can be made of materials such as polyurethane or nylon. The soft elastic adhesion layer can prevent the inner wall of the processing container from being worn by the polishing processing medium and improve the friction coefficient.

Preferably, the processing bin is in the shape of a regular hexagonal prism, and the radius of the inscribed circle of the processing bin is r _b , where r _b =R _I +R _O -rr _s +h, where R _I is the inner diameter of the ferrule, and R _O is the outer diameter of the ferrule , r is the distance between the center of a single support rod and the center of rotation of the floating tooling, _rs is the radius of the support rod, h is the distance between the lowest point of the ferrule and the lowest point of the inner wall of the processing bin when the ferrule is stationary, and the minimum value of h The range is controlled between 50-100mm. In this way, the setting structure is reasonable and meets the processing requirements.

Preferably, the radius of the circumscribed circle of the circumference where all the support rods are located is r _f , the distance between the center of a single support rod and the center of rotation of the floating tooling is r, and r _f =r + rs _s , in order to meet the requirements of floating clamping, it needs to meet 3rs _s <r _f <R _I . This set up the structure is reasonable.

Preferably, the support rod is made of carbon steel, and a flexible sleeve is sleeved on the outer wall of the support rod. The support rod adopts the arrangement of "inner rigidity and outer softness", and the inner part is made of carbon steel to meet the bearing requirements of the ferrule. The outer part is covered with a flexible sleeve to avoid bumping the inner surface of the workpiece during processing, which can play a protective role. The flexible sleeve provides the ferrule to be machined with the coefficient of friction required to achieve frictional drive.

Preferably, two circumferential edge grooves are opened on the upper end surface of the processing bin in contact with the cover, and an O-shaped rubber sealing ring is installed in the circumferential edge groove. After the processing bin and the cover are closed, a plurality of sets of fastening bolts are used. Nut assembly fixed connection.

Preferably, the processing bin can also be configured as a cylinder or a regular pentagonal prism, and the shape of the cover is adapted to the shape of the processing bin. The shape of the processing bin and the cover can be set according to specific needs, and other polygonal prisms can also be set.

Preferably, the polishing processing medium includes a rolling polishing block and a liquid medium, and the filling amount of the rolling polishing block is 50%-80% of the volume of the processing container. This setting is very reasonable.

The beneficial effects of the invention are: when using the rotary polishing floating tool to process parts, the amount of material removed is small, the surface quality of the ferrule parts can be improved on the basis of ensuring the original accuracy of the ferrule type parts, and the shape and shape synergistic polishing can be realized. Grinding; it can effectively reduce the surface roughness value of the ferrule, improve the surface texture, improve the surface integrity of the ferrule, and realize one-time processing of each surface, which can effectively improve efficiency and reduce costs.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the overall structure of a rotary polishing floating tool used for surface processing of ferrule parts according to the present invention when processing a ferrule.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 .

3 is a partial enlarged view of the cross-section of the support rod of the rotary polishing floating tooling according to the present invention (that is, the enlarged view at I in FIG. 1 ).

Figure 4 is a surface view of the bearing ring before machining.

Figure 5 is a surface view of the bearing ring after machining.

Figure 6 shows the surface topography of the bearing ring before machining.

Figure 7 shows the surface topography of the bearing ring after processing.

In the figure: 1. Processing container; 2. Lower connecting plate; 3. Upper connecting plate; 4. Support rod; 5. Processing bin; 6. Cover; 7. Ferrule to be processed; 8. Polishing processing medium; 9. , Upper limit bar; 10, Lower limit bar; 11, O-shaped rubber sealing ring; 12, Bolt and nut assembly.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

A rotary polishing floating tool for surface processing of ferrule parts, as shown in Figure 1-Figure 3, includes a processing container 1, a lower connecting plate 2, an upper connecting plate 3 and at least three support rods 4. The processing container 1. It includes a processing bin 5 and a cover 6 that are detachably connected. The upper end surface of the processing bin 5 in contact with the cover 6 is provided with two circumferential edge grooves, and an O-shaped rubber sealing ring 11 is installed in the circumferential edge groove. After the processing bin 5 and the cover 6 are closed, they are fixedly connected by multiple sets of bolt and nut assemblies 12. The bolt and nut assemblies 12 include eye nuts and hinged bolts. The outer wall of the processing bin 5 is close to the front edge. Assembling the pin of the bolt and nut assembly 12, the joint bolt is inserted on the pin, the edges of the processing bin 5 and the cover 6 are provided with flanges, and the flanges corresponding to each group of joint bolts are provided with avoidance screws. After rotating the joint bolts and placing them in the corresponding gaps, the joint bolts and the lifting ring nut are screwed together and fastened to realize the tight connection between the cover 6 and the processing bin 5; the inner cavity of the processing container 1 is coated with Covered with a soft elastic adhesion layer, the axial distance between the lower connecting plate 2 and the upper connecting plate 3 in the processing bin 5 is L, L=B+2a+2b, B is the thickness of the ferrule 7 to be processed, and a is the upper limit bar 9 or the radius of the lower limit bar 10, b is the distance between the two end faces of the ferrule 7 to be processed and the corresponding upper limit bar 9 or the lower limit bar 10, c is the thickness of the lower connecting plate 2, the minimum value of b The value range is controlled between 30-60mm. The axial distance L between the lower connecting plate 2 and the upper connecting plate 3 in the processing bin 5 is the processing activity range of the ferrule 7 to be processed; the processing bin 5 is in the shape of a regular hexagonal prism, and the processing bin 5 The radius of the inscribed circle is r _b , r _b =R _I +R _O -rr _s +h, where R _I is the inner diameter of the ferrule, R _O is the outer diameter of the ferrule, and r is the center and floating point of a single support rod 4 The distance between the tooling centers of rotation, _rs is the radius of the support rod 4, h is the distance between the lowest point of the ferrule and the lowest point of the inner wall of the processing bin 5 when the ferrule is stationary, and the minimum value range of h is controlled between 50-100mm; The processing bin 5 can also be set to other polygonal prism shapes such as cylindrical or regular pentagonal prism, and the shape of the cover 6 is adapted to the shape of the processing bin 5; the lower connecting plate 2 is fixedly connected to the center of the bottom wall of the processing bin 5, and the upper connecting The plate 3 is fixed to the center of the inner wall of the cover 6, the upper connecting plate 3 and the lower connecting plate 2 are circular ring plates, and the circle centers of the upper connecting plate 3 and the lower connecting plate 2 are located on the axis of rotation of the floating tooling, which is for the center of gravity of the rotation. Stable; the upper connecting plate 3 is connected with at least three upper limit bars 9 located on the radial direction of the upper connecting plate 3, and the upper limit bars 9 are evenly distributed along the circumferential direction of the upper connecting plate 3; The lower limit bars 10 on the radial direction of the connecting plate 2, the lower limit bars 10 are evenly distributed along the circumferential direction of the lower connecting plate 2; The straight side walls of the bar 9 and the lower limit bar 10 are in close contact with the upper connecting plate 3 and the lower connecting plate 2 respectively; the midpoint of the bottom wall of the processing bin 5 and the midpoint of the cover 6 are located on the axis of rotation of the floating tooling, and the support rod 4's The two ends are respectively detachable and vertically connected to the upper connecting plate 3 and the lower connecting plate 2, and all the support rods 4 are evenly distributed on the circumference with the center of the bottom wall of the processing bin 5 as the center of the circle, and the to-be-processed ferrule 7 is sleeved on all the supports The outside of the rod 4 and the radius of the ferrule is greater than the radius of the circle where the support rod 4 is located; the radius of the circumscribed circle of the circle where all the support rods 4 are located is r _f , the distance between the center of a single support rod 4 and the center of rotation of the floating tooling is r, and r _f =r+r _s , in order to meet the floating clamping requirements, _3rs <r _f <R _I needs to be satisfied; the support rod 4 is made of carbon steel, and a flexible sleeve is sleeved on the outer wall of the support rod 4; the processing container 1 The grinding medium 8 is filled with the grinding medium 8 , and the grinding medium 8 includes a rolling grinding block and a liquid medium, and the filling amount of the rolling grinding block is 50%-80% of the volume of the processing container 1 . During specific implementation, the number of support rods 4 , upper limit bars 9 , and lower limit bars 10 may be set to 3 to 10. In the specific embodiment, the number of support rods 4 , upper limit bars 9 , and lower limit bars 10 are respectively set to six. And the included angle between the support rod 4 and the upper limit bar 9/lower limit bar 10 is α, and the value of α is determined according to α=360°/2n.

The ferrule 7 to be processed is suspended on all the support rods 4, because the radius of the ferrule is greater than the radius of the circumference of the support rod 4, so the floating clamping of the ferrule is realized by the single-sided constraint of several support rods 4, and the support rod 4 When the processing container 1 rotates, the ferrule achieves a continuous rotating motion through friction with the support rod 4 . During processing, a polishing medium 8 is loaded into the processing container 1, and the polishing medium 8 generates a certain relative movement and force on the surface of the ferrule with the movement of the container, so as to achieve a one-time smoothing of the surfaces of the ferrule parts. For the purpose of machining, and the amount of material removed by this polishing method is small, it can ensure the original accuracy of the ferrule parts while improving the surface performance, and realize the synergistic polishing process of shape and shape. The specific processing diagrams are shown in Figure 4-Figure 7. In actual use, the floating tooling is in a vertical state, wherein the rear end of the floating tooling is the bottom wall of the processing bin 5, the front end of the floating tooling is where the cover 6 is located, the lower connecting plate 2 is located on the rear side, and the upper The connecting plate 3 is located on the front side. When the processing container 1 is stationary, the whole ferrule is located in the vertical direction, and the ferrule is suspended on the two upper support rods 4 . The inner middle plane of the processing container 1 is the reference plane, the axis of rotation of the floating tooling is the X axis, and the intersection of the reference plane and the rotation axis is the origin O, and the XYZ rectangular coordinate system is established on the processing container 1, and the processing container 1 can be realized around the X axis. Invert. In order to prevent the polishing medium from adhering to the ferrule and leaving scratches on the surface of the ferrule during the polishing process, two wedge angles are cut on the cylindrical surface of the support rod 4, as shown in Figure 3. The method of using a rotary polishing floating tool for surface processing of ferrule parts according to the present invention is as follows:

S1. First, fix the lower limit bar 10 on the lower connecting plate 2 by screws, and connect the bottom ends of all support rods 4 with the lower connecting plate 2 to form a lower connecting piece, and install the lower connecting piece in the center of the bottom wall of the processing bin 5 superior;

S2, hang the ferrule 7 to be processed on the support rod 4;

S3, fix the upper limit bar 9 on the upper connecting plate 3 through screws, and then connect the upper connecting plate 3 and the top of the support rod 4 through screws;

S4. Load the polishing medium 8 into the processing bin 5, and the filling amount of the polishing medium 8 is 50%-80% of the volume of the processing container 1;

S5, install two O-shaped rubber sealing rings 11 in the two annular edge grooves on the upper end face of the processing bin 5 in contact with the cover 6, and then close the cover 6;

S6, fix the rotary polishing floating tool on the motor through the connecting piece, rotate clockwise around the rotary axis at the speed n1, and the processing time is t1;

S7, then rotate counterclockwise around the axis of rotation at the rotational speed n2, and the processing time is t2;

S8. Repeat the processing steps S6 to S7 until the finishing process of the ferrule is completed;

S9 , remove the cover 6 and the upper connecting plate 3 , and remove the ferrule from the support rod 4 .

In the specific embodiment 1, in order to ensure the continuous movement of the ferrule 5, six support rods 4, upper limit bars 9, and lower limit bars 10 are respectively set. The circumcircle radius of the entire circumference of the support rod 4 is 200 mm, wherein the radius of a single support rod 4 is 25 cm, and the cross-sectional shape of the container body is a regular hexagon. The radius of the inscribed circle R _B is 540mm. The distance between the center of a single support rod 5 and the center of rotation of the floating tooling is 175mm; All are staggered and the included angle is 30°, the upper limit bar 9 and the lower limit bar 10 are both semi _- cylindrical bodies, the radius is 30mm, and the length L1 is 300mm. 605mm, the horizontal width is 78mm. The ferrule 7 to be processed utilizes the above-mentioned rotary polishing floating tool for surface processing of ferrule parts to carry out the polishing process as follows:

S1. First, fix the lower limit bar 10 on the lower connecting plate 2 by screws, and connect the bottom ends of all support rods 4 with the lower connecting plate 2 to form a lower connecting piece, and install the lower connecting piece in the center of the bottom wall of the processing bin 5 superior;

S2, hang the ferrule 7 to be processed on the support rod 4;

S3, fix the upper limit bar 9 on the upper connecting plate 3 through screws, and then connect the upper connecting plate 3 and the top of the support rod 4 through screws;

S4. Load the polishing medium 8 into the processing bin 5, the volume of the processing bin 5 is about 232L, and the filling amount of the polishing medium 8 is 70% of the volume of the processing container 1, then the filling amount of the polishing medium 8 is about It is 150L, and the polishing medium 8 is composed of 14# walnut shell and S-100 roller varnish;

S5, install two O-shaped rubber sealing rings 11 in the two annular edge grooves on the upper end face of the processing bin 5 in contact with the cover 6, and then close the cover 6;

S6. Fix the rotary polishing floating tool on the motor through the connector, rotate clockwise around the rotary axis at a speed of 62r/min, and the processing time is 60min;

S7, then rotate counterclockwise around the rotation axis at a speed of 62r/min, and the processing time is 60min;

S8, repeat the processing steps S6 to S7, the total processing time is 240min, until the finishing process of the ferrule is completed;

S9 , remove the cover 6 and the upper connecting plate 3 , and remove the ferrule from the support rod 4 .

Processing effect: The surface roughness Ra value of the inner cylinder of the ferrule is reduced from 0.795μm to 0.613μm, the scratches are removed, the surface roughness Ra value of the outer cylinder is reduced from 0.929μm to 0.872μm, the scratches are removed, and the end surface roughness Ra value From 0.615μm to 0.525μm, the scratch part is removed, and the finishing target is achieved.

In the specific embodiment 2, the ferrule 7 to be processed is the inner ring of the bearing, its outer diameter is 490mm, and the width is 41mm. The process is:

S1. First, fix the lower limit bar 10 on the lower connecting plate 2 by screws, and connect the bottom ends of all support rods 4 with the lower connecting plate 2 to form a lower connecting piece, and install the lower connecting piece in the center of the bottom wall of the processing bin 5 superior;

S2, hang the ferrule 7 to be processed on the support rod 4;

S3, fix the upper limit bar 9 on the upper connecting plate 3 through screws, and then connect the upper connecting plate 3 and the top of the support rod 4 through screws;

S4. Load the polishing medium 8 into the processing bin 5, the volume of the processing bin 5 is about 232L, and the filling amount of the polishing medium 8 is 90% of the volume of the processing container 1, then the filling amount of the polishing medium 8 is about It is 190L, and the polishing medium 8 is composed of 14# walnut shell and S-100 roller varnish;

S5, install two O-shaped rubber sealing rings 11 in the two annular edge grooves on the upper end face of the processing bin 5 in contact with the cover 6, and then close the cover 6;

S6. Fix the rotary polishing floating tool on the motor through the connector, rotate clockwise around the rotary axis at a speed of 39r/min, and the processing time is 60min;

S7, then rotate counterclockwise around the rotation axis at a speed of 39r/min, and the processing time is 60min;

S8, repeat the processing steps S6 to S7, the total processing time is 720min, until the finishing process of the ferrule is completed;

S9 , remove the cover 6 and the upper connecting plate 3 , and remove the ferrule from the support rod 4 .

Processing effect: The surface roughness Ra value of the inner cylinder of the ferrule is reduced from 1.042μm to 0.600μm, the scratches are removed, the surface roughness Ra value of the outer cylinder is reduced from 0.288μm to 0.156μm, the scratches are removed, and the end surface roughness Ra value From 0.266μm to 0.144μm, the scratch part is removed, and the finishing target is achieved.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. The utility model provides a rotation polishing and grinding frock that floats for lasso class part surface machining, a serial communication port, including processing container (1), lower connection pad (2), upper connection pad (3) and three piece at least spinal branch vaulting poles (4), processing container (1) is including dismantling processing storehouse (5) and closing cap (6) of connecting, lower connection pad (2) link firmly to the diapire central authorities of processing storehouse (5), upper connection pad (3) link firmly to closing cap (6) inner wall central authorities, the diapire mid point of processing storehouse (5) and the mid point of closing cap (6) all are located unsteady frock pivot line, can dismantle respectively perpendicular connection to upper connection pad (3) and lower connection pad (2) at the both ends of bracing piece (4), and all bracing pieces (4) evenly distributed are on the circumference that uses the center of the diapire of processing storehouse (5) as the centre of a circle, treat that lasso (7) cover is located all bracing pieces (4) outsidely and treat that the internal diameter of processing lasso (7) is greater than the half circumference that bracing piece (4) are located Diameter; the processing container (1) is filled with polishing and grinding media (8).

2. The rotary polishing and grinding floating tool for processing the surfaces of ferrule parts as claimed in claim 1, wherein the upper connecting disc (3) and the lower connecting disc (2) are both circular ring plates, and the circle centers of the upper connecting disc (3) and the lower connecting disc (2) are located on the rotation axis of the floating tool; the upper connecting disc (3) is connected with at least three upper limiting strips (9) which are positioned on the upper connecting disc (3) in the radial direction, and the upper limiting strips (9) are uniformly distributed along the circumferential direction of the upper connecting disc (3); at least three lower limiting strips (10) which are positioned on the upper connecting disk (2) in the radial direction are connected to the lower connecting disk (2), and the lower limiting strips (10) are uniformly distributed along the circumferential direction of the lower connecting disk (2).

3. The rotary polishing and floating tool for processing the surfaces of ferrule parts as claimed in claim 2, wherein the upper limiting strip (9) and the lower limiting strip (10) are semi-cylindrical strip structures with the same structure and size, and the straight side walls of the upper limiting strip (9) and the lower limiting strip (10) are respectively and tightly attached to the upper connecting disc (3) and the lower connecting disc (2).

4. The rotary polishing and floating tool for processing the surfaces of ferrule parts as claimed in claim 3, wherein the inner cavity of the processing container (1) is coated with a soft elastic adhesion layer, the axial distance between the lower connecting disc (2) and the upper connecting disc (3) in the processing bin (5) is L, L = B +2a +2B, B is the thickness of the ferrule (7) to be processed, a is the radius of the upper limiting strip (9) or the lower limiting strip (10), B is the distance between two end faces of the ferrule (7) to be processed and the corresponding upper limiting strip (9) or the corresponding lower limiting strip (10), and the minimum value range of B is controlled to be 30-60 mm.

5. The rotary polishing and grinding floating tool for the surface machining of the ferrule parts as claimed in any one of claims 1 to 4, wherein the machining bin (5) is in a regular hexagonal prism shape, and the radius of an inscribed circle of the machining bin (5) is r _b ，r _b =R _I +R _O -r-r _s + h wherein R _I Is the inner diameter of the ferrule, R _O Is the outer diameter of a ferrule, r is the distance between the circle center of a single supporting rod (4) and the rotation center of the floating tool, r _s The radius of the supporting rod (4) is defined, h is the distance between the lowest point of the ferrule when the ferrule is static and the lowest point of the inner wall of the processing bin (5), and the minimum value range of h is controlled to be 50-100 mm.

6. The rotary polishing and grinding floating tool for processing the surface of a ferrule part as claimed in claim 5, wherein the radius of the circumcircle of the circumference where all the support rods (4) are located is r _f The distance between the circle center of the single supporting rod (4) and the rotation center of the floating tool is r, and r is _f =r+ r _s In order to meet the requirement of floating clamping, 3r needs to be met _s <r _f <R _I 。

7. The rotary polishing and grinding floating tool for machining the surfaces of ferrule parts as claimed in claim 6, wherein the support rod (4) is made of carbon steel, and a flexible sleeve is sleeved on the outer wall of the support rod (4).

8. The rotary polishing and grinding floating tool for the surface machining of the ferrule parts as claimed in claim 7, wherein two circumferential edge grooves are formed in the upper end face of the machining bin (5) in contact with the sealing cover (6), O-shaped rubber sealing rings (11) are assembled in the circumferential edge grooves, and the machining bin (5) and the sealing cover (6) are fixedly connected through a plurality of sets of bolt and nut assemblies (12) after being closed.

9. The rotary polishing and grinding floating tool for the surface machining of the ferrule parts as claimed in claim 8, wherein the machining bin (5) is further configured to be cylindrical or a regular pentagonal prism, and the shape of the sealing cover (6) is matched with that of the machining bin (5).

10. The rotary polishing and floating tool for the surface machining of the ferrule parts as claimed in claim 9, wherein the polishing and machining medium (8) comprises a barrel polishing block and a liquid medium, and the filling amount of the polishing and machining medium (8) is 50-80% of the volume of the machining container (1).

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