A drilling device and processing method for differential housing manufacturing

Abstract

The application relates to the technical field of drilling processing, and particularly discloses a drilling device for differential housing manufacturing and a processing method, which comprises a rotating disc I uniformly provided with multiple processing stations on the surface and capable of rotating, a processing rack arranged above the rotating disc I, drilling mechanisms corresponding to the processing stations one by one and installed on the surface of the processing rack, a plurality of drill bits uniformly arranged on each drilling mechanism, clamping pieces for clamping workpieces arranged at the positions of each processing station, a supporting rack I assembled below the rotating disc I, and rotating mechanisms arranged in the rotating disc I and used for rotating the clamping pieces; and a polishing mechanism assembled below the clamping pieces and used for abutting against the surface of a workpiece flange. The polishing mechanism integrated with a deburring function under the drilling processing station improves the production efficiency of the workpiece through process parallelism, and the workpieces in different processing stations are polished through polishing pieces with different polishing precisions, so that the polishing effect is better, and the quality of the workpieces is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling processing, and particularly discloses a drilling device for differential housing manufacturing and a processing method. BACKGROUND

[0002] The differential housing is a key component in an automobile transmission system, and has a plurality of connecting holes or mounting holes that need to be processed with high precision, especially the positions of the flanges need a plurality of bolt holes, so that a rotary table type multi-station drilling machine is usually selected in the drilling process to effectively improve the drilling efficiency. However, since the flange bolt holes are high-strength connecting holes, higher position tolerance, good size consistency and uniform chamfer of the hole mouth are required to eliminate stress concentration, so that the flange bolt holes cannot be processed and formed at one step, and need to be processed in sequence by a plurality of stations after rough machining and then fine machining. Therefore, the flange surface drilling burrs need to be removed after processing.

[0003] After all the drilling stations are completed, a separate station or offline mode is used to perform one-time burr processing on all the hole positions. This kind of mode breaks the continuity and rhythm of production, so that the burr removal link becomes the efficiency bottleneck of the entire production process, affecting the production efficiency of the differential housing. More importantly, since the machining accuracies of different stations on the rotary table are different, such as the rough machining station has large cutting force and irregular burrs, the fine machining station has small cutting force and fine burrs but requires high accuracy. Therefore, the burrs differ significantly in shape, size and removal difficulty. A unified polishing method may cause insufficient polishing for the rough machining burrs, resulting in burr residues, and may cause excessive polishing for the fine machining burrs, affecting the size consistency. In the drilling process, the burrs of the bolt holes are removed. Since the moving path between the processing stations is short, it is difficult to polish the burrs by moving, resulting in poor polishing effect.

[0004] Therefore, there is an urgent need for a drilling device for differential housing manufacturing and a processing method, which can be integrated into a rotary table type drilling machine, and can polish the burrs of different processing stations in real time to improve the production efficiency and quality of products. SUMMARY

[0005] To solve the above problems, the present application provides a drilling device for differential housing manufacturing and a processing method, which are used to solve the problems mentioned in the background.

[0006] In order to achieve the above object, the present application adopts the following technical scheme to realize it: A drilling device for differential housing manufacturing, comprising a turntable one with a plurality of machining stations uniformly arranged on the surface and capable of rotating, the machining precision of the machining stations gradually increases along the rotating direction of the turntable one, a machining frame is arranged above the turntable one, the surface of the machining frame is provided with a drilling mechanism corresponding to each machining station, a plurality of drill bits are uniformly arranged on each drilling mechanism, the position of each machining station is provided with a clamping piece for clamping the workpiece, a supporting frame one is arranged below the turntable one, and a rotating mechanism for rotating the clamping piece is arranged in the turntable one; a polishing mechanism for abutting against the surface of the flange of the workpiece is arranged below the clamping piece, the polishing mechanism comprises a plurality of polishing pieces with different polishing precision and flexible material, the polishing pieces are arranged between adjacent clamping pieces, and the polishing pieces are fixedly connected through a mounting mechanism, the surface of the supporting frame one is provided with a guide rail frame capable of moving axially along the turntable one, and the mounting mechanism is mounted on the surface of the guide rail frame; a turntable two for supporting the workpiece is arranged below the polishing mechanism, a limiting plate is mounted on the surface of the turntable two through a sealing bearing, a groove with a shape matching the lower end of the workpiece is formed in the surface of the limiting plate, and a supporting frame two is arranged below the turntable two; the moving paths of the clamping piece, the turntable one and the polishing mechanism are matched, the polishing pieces are attached to the surface of the flange drilling position to perform the polishing work of burrs, the turntable one moves the workpiece to different machining stations for multiple times, and the polishing pieces perform the polishing work of the burrs on the surface of the flange drilling position with different precision in batches.

[0007] Preferably, the rotating mechanism comprises a main tooth concentrically arranged with the turntable one, the surface of the clamping piece is provided with a secondary tooth meshing with the main tooth, and the inner part of the main tooth is concentrically provided with a supporting column fixedly connected with the supporting frame one.

[0008] Preferably, the mounting mechanism comprises two annular frames arranged concentrically, the polishing pieces are arranged in an arc shape and mounted on the surface of the annular frame, and the surface of the supporting column is slidably provided with a mounting sleeve fixedly connected with the annular frame.

[0009] Preferably, the surfaces of the supporting frame one and the supporting frame two are provided with roller shaft assemblies for reducing friction.

[0010] Preferably, the center position of the turntable one is provided with a servo motor for driving the turntable one to rotate.

[0011] Preferably, a machining method of the drilling device for differential housing manufacturing comprises the following steps: S1, clamping and fixing: placing the workpiece on the first machining station, abutting the bottom against the inner part of the groove, and clamping and fixing through the clamping piece.

[0012] S2, drilling: drilling the flange position of the workpiece in the first machining station by the corresponding drilling mechanism, in which process the polishing mechanism is away from the initial position of the back surface of the workpiece.

[0013] S3, polishing: after the drilling in the first machining station is completed, the polishing mechanism is attached to the surface of the flange drilling position, the servo motor controls the rotation of the turntable to the next machining station, and in the process of rotating the turntable, the polishing mechanism polishes the burrs on the surface of the flange drilling position.

[0014] S4, repeat: after the turntable is rotated to the next machining station in step S3, repeat steps S2 and S3 until all machining stations are completed and moved to the initial first machining station, and then the finished workpiece is taken out.

[0015] S5, cycle: after the turntable is rotated to the next machining station in step S3, repeat steps S2 and S3 until all machining stations are completed and moved to the initial first machining station, and then the finished workpiece is taken out.

[0016] Preferably, in step S3, the polishing mechanism moves along the surface of the guide rail perpendicular to the axis of the turntable.

[0017] The above technical solution has the following advantages or beneficial effects: 1. The polishing mechanism with deburring function is integrated below the drilling machining station, which improves the production efficiency of the workpiece through process parallel, and the workpiece is polished by polishing pieces with different polishing precision, so that the polishing effect is better and the workpiece quality is higher.

[0018] 2. The polishing mechanism is integrated in the internal of the machining station, and the polishing mechanism performs polishing action during the intermittent conversion of the drilling machining station, and the polishing path is the complex movement path of the clamping piece, the turntable and the polishing mechanism, so as to effectively prolong the polishing path during the change of station, ensure that the polishing is in place once the station is changed, realize the function of synchronous deburring and workpiece conveying, solve the technical defect of production stop caused by traditional independent and offline deburring, greatly reduce the deburring time, greatly compress the machining cycle time of single workpiece, and effectively improve the production efficiency of workpiece.

[0019] 3. The application ensures that large burrs generated by rough machining can be removed by force, and that micro-burrs after finishing can be polished without damage, fundamentally avoiding the problems of burr residue caused by "insufficient polishing" and damage to precise hole walls and chamfers caused by "excessive polishing". The differentiated polishing strategy ensures that each flange bolt hole formed by drilling can obtain uniform and smooth orifices and chamfers, effectively eliminating stress concentration points, and greatly improving the fatigue strength, assembly quality and service life of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application and its features, shapes and advantages will become more apparent by reading the detailed description of the non-limiting embodiments, with reference to the accompanying drawings. The same reference numbers in all the drawings indicate the same parts, and the drawings are not necessarily drawn to scale, the emphasis being on illustrating the main idea of the application.

[0021] Figure 1 is a perspective structural schematic diagram of a drilling device for differential housing manufacturing provided by the present application.

[0022] Figure 2 is Figure 1 is a bottom perspective structural schematic diagram of support frame one and support frame two.

[0023] Figure 3 is a top perspective structural schematic diagram of the position of turntable one.

[0024] Figure 4 is a bottom perspective structural schematic diagram of the position of guide rail frame.

[0025] Figure 5 is a structural schematic diagram of the meshing state of main teeth and secondary teeth.

[0026] Figure 6 is a top perspective structural schematic diagram of the position of turntable two.

[0027] Figure 7 is a perspective structural schematic diagram of the polishing mechanism.

[0028] In the figure: 1, turntable one; 2, clamping piece; 3, rotating mechanism; 31, main tooth; 32, secondary tooth; 33, support column; 4, support frame one; 5, polishing mechanism; 51, polishing piece; 52, mounting mechanism; 521, annular frame; 522, mounting sleeve; 53, guide rail frame; 6, turntable two; 7, sealing bearing; 8, limiting plate; 9, support frame two; 10, groove; 11, servo motor. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] In order to enable the person skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0031] Figures 1-7 Disclosed is a differential housing machining drilling device, comprising a rotating disc one 1 provided with a plurality of machining stations on the surface, and a deburring process is seamlessly embedded in the machining station conversion period of drilling, so as to realize the deburring function of the workpiece immediately in the drilling process, greatly compress the machining cycle time of the entire workpiece, and gradually increase the machining precision of the machining station along the rotation direction of the rotating disc one 1, at the same time, provide polishing tools corresponding to different precision for machining stations of different precision drilling, realize the precise and efficient removal of rough and fine processing burrs, and thus ensure the final workpiece machining quality.

[0032] The workpiece is specifically a differential housing with a flange, and the differential housing machining drilling device of the embodiment is mainly used for flange bolt hole drilling operation of the differential housing; the polishing tool is specifically a polishing piece 51 in the following content.

[0033] As shown in Figures 1-2 and Figures 6-7 In the embodiment, the rotating disc one 1 is designed with four machining stations, and the four machining stations are respectively arranged as rough drilling (efficiently removing material), semi-precision drilling (correcting hole shape and homogenizing allowance), boring (correcting assembly error) and precision reaming (realizing the final size and surface quality). A machining rack (not shown in the figure) is arranged above the rotating disc one 1, and different drilling mechanisms are respectively installed on the surface of the machining rack corresponding to different stations. Each drilling mechanism corresponds to different drill bits to process bolt holes on the surface of the flange. The drilling mechanism of each machining station is executed by an independent power source and control system, which belongs to the prior art and will not be described here.

[0034] To solve the problem of differentiated deburring, a polishing mechanism 5 is arranged below the turntable 1. The polishing mechanism 5 adopts a modular and multi-precision assembly method. In this embodiment, the polishing mechanism 5 includes four polishing pieces 51. The polishing precision of the four polishing pieces 51 matches the machining precision of the drilling mechanism on the machining station. The polishing precision is also gradually increased. In the machining station for rough drilling, large, thick and irregularly shaped tear-shaped burrs are usually generated. Therefore, a louver wheel with coarse granularity (P60-P90) can be used. The louver wheel has strong cutting force and certain flexibility. In the machining station for semi-precision drilling, smaller and regularly shaped burrs are usually generated. Since better machining conditions are needed for subsequent precision machining, all residual burrs need to be removed. A nylon brush containing abrasive can be used. The nylon brush has good flexibility and can follow the shape change of the hole. In the machining station for boring, fine and continuous burrs are generated and need to be removed without damage. A fine-grit sandpaper can be used for polishing. It should be noted that any scratches or changes to the precise geometry of the boring hole should be avoided in the flange bolt hole. In the machining station for fine reaming, very fine and brittle burrs are generated. Therefore, a non-woven cloth wheel can be used for polishing. The non-woven cloth wheel is sponge-like and highly elastic, can perfectly fit the hole, and can achieve rubbing polishing to remove burrs and achieve mirror effect, thereby achieving the technical effect of differentiated polishing of burrs generated by drilling holes with different precision.

[0035] The four polishing pieces 51 are fixedly connected by a mounting mechanism 52. The mounting mechanism 52 includes an annular frame 521 and a mounting sleeve 522. The annular frame 521 is provided with two annular frames 521, which differ in diameter. The polishing piece 51 mounted on the large-diameter annular frame 521 is used to polish the burrs on the outside of the flange bolt hole. The polishing piece 51 mounted on the small-diameter annular frame 521 is used to polish the burrs on the inside of the flange bolt hole. The small-diameter annular frame 521 is fixedly connected to the surface of the mounting sleeve 522 by a straight rod. The large-diameter annular frame 521 is fixedly connected to the surface of the mounting sleeve 522 by an L-shaped rod. In order to ensure that the polishing piece 51 is flexible and fits the surface of the flange, and further avoid the problems of "excessive polishing" or "insufficient polishing", each polishing piece 51 is installed on the surface of the annular frame 521 by a universal floating joint (not shown in the figure), so that the polishing piece 51 can adapt to the uneven surface of the flange when it contacts the workpiece.

[0036] As Figure 1 and Figures 3-6As shown, in order to ensure that each bolt hole of each flange can be polished, each workpiece needs to rotate during the movement of the workpiece to the next station, so the rotating mechanism 3 is arranged to make each workpiece rotate while revolving, the rotating mechanism 3 includes a secondary tooth 32, a clamping piece 2 is installed on each station of the first rotating disc 1, the secondary tooth 32 is fixed on the surface of each clamping piece 2 through a spline, the inside of the first rotating disc 1 is provided with a cavity (not shown in the figure), the secondary tooth 32 is installed inside the cavity, a fixed primary tooth 31 is installed inside the cavity, each secondary tooth 32 is engaged with the primary tooth 31, in order to prevent the waste generated during the drilling process of the drilling mechanism on the flange bolt hole from splashing into the inside of the cavity, referring to Figure 3 , a sealing ring is installed on the surface of the clamping piece 2, and the clamping piece 2 is arranged in a sunken manner, the machining platform surface of the clamping piece 2 is located below the first rotating disc 1, a support frame one 4 is installed below the first rotating disc 1, a roller shaft assembly (not shown in the figure) is installed on the surface of the support frame one 4 to reduce the friction of the rotation of the first rotating disc 1, a support column 33 is fixedly installed in the middle of the primary tooth 31, a servo motor 11 is coaxially installed on the surface of the first rotating disc 1, and the servo motor 11 is fixed on the machining frame. When the first rotating disc 1 rotates, the secondary tooth 32 will rotate around the primary tooth 31, and the rotation is completed through the engagement of the teeth, so as to prolong the polishing path and ensure that each flange bolt hole can be polished. It needs to be noted that the polishing path is obtained by workers in the field through many tests to achieve the desired purpose.

[0037] In order to ensure the stability of the workpiece during drilling, the second rotating disc 6 is arranged below the first rotating disc 1, the surface of the second rotating disc 6 is provided with a limiting plate 8 through a sealing bearing 7, the surface of the limiting plate 8 is provided with a groove 10, the internal shape of the groove 10 is matched with the shape of the bottom of the workpiece, and the movement of the workpiece can drive the rotation of the second rotating disc 6, so as to ensure that the second rotating disc 6 can continuously provide support force, and the support frame two 9 is installed below the second rotating disc 6. The surface of the support frame two 9 is provided with a roller shaft assembly to improve the smoothness of rotation, and the support column 33 is fixed on the surface of the support frame two 9.

[0038] In order to embed the polishing process into the drilling machining station conversion period, reduce the overall workpiece processing time, an electric push rod is installed on the surface of the support column 33, an end of the electric push rod is fixedly provided with a guide rail frame 53, the moving direction of the guide rail frame 53 is the axial direction of the support column 33, the same electric push rod is installed on the surface of the guide rail frame 53 to drive the polishing mechanism 5 to move, the moving direction of the polishing mechanism 5 is perpendicular to the axial direction of the support column 33, the guide rail frame 53 moves away from the workpiece during drilling, and after the drilling is completed, the guide rail frame 53 moves to drive the polishing mechanism 5 to move close to the workpiece. During the rotation of the first rotating disc 1, the polishing mechanism 5 reciprocates to form a more complex polishing track, so as to ensure that the entire circumference of each flange bolt hole can be uniformly polished.

[0039] The inside of the groove 10 is provided with an optical sensor, which can be a transmitting or reflecting photoelectric sensor, when the workpiece is placed in the inside of the groove 10, the detection light beam of the photoelectric sensor is blocked, and the sensor generates a "installed in place" signal, the optical sensor is mainly used to confirm whether the workpiece is placed correctly in the groove 10 of the limiting plate 8; the clamping part 2 adopts existing pneumatic or hydraulic clamping control, and the clamping part 2 is provided with a pressure sensor, when the clamping pressure of the clamping part 2 reaches the preset value of the pressure sensor, it is determined that the workpiece has been reliably clamped, and then the drilling work is carried out, and the pressure sensor is mainly used to confirm whether the workpiece is clamped.

[0040] In addition, the application provides a machining method of the drilling device for differential housing manufacturing, which comprises the following processes: firstly, the workpiece is placed in the first machining station, specifically in the inside of the groove 10 of the limiting plate 8, then the clamping part 2 clamps the workpiece, and the pressure sensor arranged on the clamping part 2 feeds back a "clamping completed" signal; after clamping is completed, rough drilling machining is carried out, a drill bit corresponding to the drilling mechanism is used to carry out rough drilling machining on the flange, when the rough drilling machining is completed, the drill bit is retracted, the guide rail frame 53 moves to drive the polishing mechanism 5 to adhere to the surface of the flange drilling position of the workpiece, and the first rotating disc 1 starts to rotate, during the rotation time of the first rotating disc 1, the workpiece rotates, the polishing mechanism 5 polishes the flange bolt hole position of the workpiece in a complex path, when the workpiece reaches the next machining station, the polishing mechanism 5 is lowered to reset, and the above steps are repeatedly carried out until the rough drilling, semi-precision drilling, boring and precision reaming machining operations are completed, and then the workpiece is removed, and the machining is completed; during the whole process, the deburring and polishing action completely overlaps with the rotating disc indexing time, the polishing action is carried out during the intermittent conversion of the four drilling machining stations, the function that the deburring and workpiece conveying are carried out synchronously is realized, the technical defect that the production is stopped due to traditional independent and offline deburring is solved, the deburring time is greatly reduced, the machining cycle time of a single workpiece is greatly compressed, and the production efficiency of the workpiece is effectively improved; meanwhile, the differential polishing strategy ensures that each flange bolt hole formed through the four drilling machining stations can obtain uniform and smooth orifices and chamfers, effectively eliminates stress concentration points, and can greatly improve the fatigue strength, assembly quality and service life of the workpiece.

[0041] Need to be explained, the scheme compared with the prior art although increased polishing mechanism 5, but for the conventional ordinary mechanical structure, there is no any high cost precision, therefore the cost of increasing the above structure is low, compared with the prior art can more efficiently drill the workpiece, effectively improve the overall production efficiency, and the quality of workpiece is better, and once increase can be used for a long time, the cost of increasing the above structure is completely negligible, the above technical scheme of the application is completely based on the above prior art condition and solves the technical problem.

[0042] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the application.

[0043] In the description of the application, it should be understood that unless otherwise specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the application can be understood through specific circumstances.

[0044] The preferred embodiments of the application are described above. It should be understood that the application is not limited to the above specific embodiments, and the equipment and structures not described in detail should be understood as being implemented in the ordinary way in the art; any skilled person in the art can make many possible changes and modifications, or modify equivalent embodiments without departing from the technical scheme of the application, which does not affect the essential content of the application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the application, without departing from the technical scheme of the application, all still belong to the protection scope of the technical scheme of the application.

Claims

1. A differential housing manufacturing drilling device, comprising a turntable one with a plurality of machining stations uniformly arranged on the surface and capable of rotating, the machining precision of the machining stations gradually increases along the rotation direction of the turntable one, a machining frame is arranged above the turntable one, the machining frame is provided with a drilling mechanism corresponding to each machining station on the surface, a plurality of drill bits are uniformly arranged on each drilling mechanism, a clamping piece for clamping a workpiece is arranged at the position of each machining station, and a supporting frame one is arranged below the turntable one. The inner part of the rotating disc one is provided with a rotating mechanism for self-rotation of the clamping piece; The lower part of the clamping piece is provided with a polishing mechanism for abutting against the flange surface of the workpiece, the polishing mechanism comprises a plurality of polishing pieces with different polishing precision and flexible material, the polishing pieces are installed between adjacent clamping pieces, a plurality of polishing pieces are fixedly connected through a mounting mechanism, the surface of the support frame one is provided with a guide rail frame for axial movement along the rotating disc one, and the mounting mechanism is installed on the surface of the guide rail frame; The lower part of the polishing mechanism is provided with a rotating disc two for supporting the workpiece, a limiting plate is installed on the surface of the rotating disc two through a sealing bearing, a groove matched with the shape of the lower end of the workpiece is formed in the surface of the limiting plate, and a support frame two is arranged below the rotating disc two. The moving paths of the clamping piece, the rotating disc one and the polishing mechanism are matched, the polishing piece is attached to the surface of the flange drilling position to polish burrs, the rotating disc one moves the workpiece to different machining stations for multiple times, and the polishing piece polishes the surface burrs of the flange drilling position with different precision in batches.

2. The drilling apparatus for manufacturing a differential case according to claim 1, characterized by: The rotating mechanism comprises a main tooth concentrically arranged with the rotating disc one, the surface of the clamping piece is provided with a secondary tooth engaged with the main tooth, and the inner part of the main tooth is concentrically provided with a supporting column fixedly connected with the support frame one.

3. The apparatus for drilling a differential case according to claim 2, wherein: The mounting mechanism comprises two annular frames arranged concentrically, the polishing piece is in an arc shape and is installed on the surface of the annular frame, and the surface of the supporting column is slidably provided with a mounting sleeve fixedly connected with the annular frame.

4. The apparatus for drilling differential housing according to claim 1, wherein: Roller assemblies are arranged on the surfaces of the support frame one and the support frame two to reduce friction.

5. The apparatus for drilling differential housing according to claim 1, wherein: A servo motor is installed at the center position of the rotating disc one to drive the self-rotation of the rotating disc one.

6. A processing method of a drilling device for differential case manufacturing, characterized by, The drilling device is used in cooperation with the differential housing manufacturing device shown in claim 5, and comprises the following steps: S1, clamping and fixing: placing the workpiece on the first machining station, abutting the bottom against the inner part of the groove, and clamping and fixing through the clamping piece; S2, drilling machining: drilling the flange position of the workpiece on the first machining station through the corresponding drilling mechanism, and in the process, the polishing mechanism is away from the initial position of the back surface of the workpiece; S3, polishing operation: after the drilling machining of the first machining station is completed, the polishing mechanism is attached to the surface of the flange drilling position, the servo motor controls the rotating disc one to rotate to the next machining station, and in the rotating process of the rotating disc one, the polishing mechanism polishes the surface burrs of the flange drilling position; S4, repeated operation: after the rotating disc one rotates to the next machining station in step S3, steps S2 and S3 are repeated until all machining stations are operated and moved to the initial first machining station, and then the machined workpiece is taken out; S5, cyclic operation: placing a new workpiece on the first machining station, and repeating steps S1 to S4 for reciprocating cyclic operation.

7. The method of claim 6, wherein: In step S3, the polishing mechanism moves along the surface of the guide rail frame perpendicular to the axis path of the rotating disc one.

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