Machining method for improving coaxiality of serial holes of main shaft of workbench shell

Abstract

The invention relates to a machining method for improving the coaxiality of serial holes of a main shaft of a workbench shell, and belongs to the field of high-precision part machining. Comprising the following steps that S1, a workbench shell is fixed to a vertical lathe workbench to be subjected to finish turning to form a first datum plane, a string hole and a datum hole; s2, turning over the workbench shell, fixing the workbench shell on a vertical lathe workbench, and carrying out finish turning to form a second reference surface and serial holes; s3, the workbench shell is overturned and fixed to a vertical mill workbench, and the first datum plane, the string hole and the datum hole are finely ground; and S4, the workbench shell is turned over and fixed to the vertical mill workbench, the part receiving disc is installed in the string hole of the second datum plane, and the string hole in the part receiving disc is finely ground. A dial indicator is adopted for coaxiality correction, and an equal-height magnetic conductive block, a clamp and an adjuster are adopted, so that the adjusting precision and the coaxiality of each string hole are improved. According to the machining method, serial hole finish turning and precision calibration are carried out step by step by overturning the workbench shell for multiple times, accumulative errors caused by one-time machining are avoided, and the machining precision and the coaxiality of serial holes are improved.

Description

Technical Field

[0001] The invention belongs to the field of high-precision parts processing and relates to a processing method for improving the coaxiality of a spindle string hole of a workbench housing. Background Art

[0002] At present, although industrial automation and precision manufacturing technology have made significant progress, and the accuracy and stability of processing equipment have been continuously improved, when it comes to processing the housing of the gear hobbing machine combination worktable, the complexity of its string hole sequence and the stringent processing accuracy requirements still pose great challenges to traditional processing methods.

[0003] When processing such high-precision parts, traditional processing methods tend to use one-time or fewer processing steps to complete the processing of the entire part. However, this method not only places extremely high demands on the accuracy and stability of the processing equipment, but also in the actual processing process, due to the influence of various factors such as material deformation, tool wear, thermal effects, etc., it is difficult to effectively avoid the generation of cumulative errors. In particular, due to the influence of the workpiece's own structure, sometimes it is impossible to complete the fine processing of the entire workpiece in one clamping, and it must be clamped in multiple times. These errors gradually accumulate in multiple processing steps, and will eventually seriously affect the coaxiality and overall accuracy of the parts, causing the parts to fail to meet the design requirements or even cause them to be scrapped. The existence of this problem not only tests the sophistication of the processing technology, but also has a profound impact on the final performance of the parts.

[0004] Therefore, exploring new processing methods and processes and how to perform precise control to avoid the generation of cumulative errors remain important research directions in the current field of high-precision parts processing. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a processing method for improving the coaxiality of the spindle string hole of the worktable housing, which can achieve precise control in steps, avoid the cumulative error caused by one-time processing, and improve the processing accuracy and coaxiality of the string hole.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A processing method for improving the coaxiality of a main shaft threading hole of a worktable housing, wherein one end of the worktable housing is a first reference surface, and the other end is a second reference surface. A parts receiving plate is matched with the worktable housing, and one side of the parts receiving plate is provided with an outer circle, and the other side is provided with a threading hole. The outer circle is clamped into the threading hole finely turned on the second reference surface to achieve the connection between the worktable housing and the parts receiving plate;

[0008] The method for processing the holes on the workbench housing comprises the following steps:

[0009] S1, fix the workbench shell on the vertical lathe workbench by a first lathe, and sequentially fine-machine a first reference surface at one end of the workbench shell, a string hole on the first reference surface, and a reference hole; the string hole and the reference hole are sequentially arranged from the first reference surface to the inside of the workbench shell and are coaxially connected;

[0010] S2, flip the workbench shell 180 degrees and place it on the second lathe, fix it on the vertical lathe workbench by a clamp, calibrate the coaxiality of the reference hole, and then fine-machine the second reference surface at the other end of the workbench shell and the string hole on the second reference surface; wherein the string hole in step S2 should be ensured to be coaxial with the reference hole;

[0011] S3, flipping the workbench housing 180 degrees again, installing the workbench housing on the vertical grinding workbench through the first vehicle, and fine-grinding the first reference surface and the string holes thereon and the reference holes after calibrating the coaxiality of the string holes on the first reference surface;

[0012] S4, flip the workbench shell 180 degrees for the third time, and make the workbench shell contact with the magnetic block through the first reference surface, so that the workbench shell is fixed on the vertical grinding workbench through the magnetic block, and then the part receiving plate is clamped into the string hole of the second reference surface. After correcting the coaxiality of the reference hole, fine-grind the string hole on the side of the part receiving plate away from the workbench shell that has been fine-machined until it is coaxial with the reference hole.

[0013] Optionally, a third reference surface located between the first reference surface and the second reference surface is provided on the workbench shell; before performing step S1, the third reference surface of the workbench shell is first scraped by a bench worker, and the first lathe is installed on the vertical lathe workbench for finish turning of its top surface; the workbench shell is fixed to the first lathe in such a way that the third reference surface is in contact with the top surface of the first lathe.

[0014] Optionally, the third reference surface is scraped by a fitter to achieve a precision requirement of at least 12 points / 25X25.

[0015] Optionally, a bolt hole is opened on the first reference surface, and the workbench shell is fixedly connected to the first vehicle tool by fixing a bolt in the bolt hole and passing through the third reference surface.

[0016] Optionally, in step S4, the first reference surface is connected to a connecting disk via connecting bolts, and then the connecting disk is fixed on the magnetic conductive block.

[0017] Optionally, the connection plate is tightened and its position is fine-tuned by means of an adjuster, and the coaxiality of the reference hole is corrected to 0.003 mm using a micrometer.

[0018] Optionally, during calibration, a micrometer is mounted on the side wall of the string hole and / or the reference hole, and the coaxiality of the string hole and / or the reference hole is calibrated by the micrometer.

[0019] Optionally, before performing step S2, the second lathe tool is first mounted on the vertical lathe workbench, and the top surface of the second lathe tool is finish-turned.

[0020] Optionally, before performing step S3, the first lathe tool is first mounted on the vertical grinding work surface, and the top surface of the first lathe tool is finely ground.

[0021] Optionally, before performing step S4, the surface of the magnetic conductive block is first ground to the same height until two opposite surfaces of the magnetic conductive block are parallel; and the magnetic conductive block is arranged on the vertical grinding table in a manner that one of the surfaces contacts the vertical grinding table.

[0022] The beneficial effects of the present invention are:

[0023] In view of the technical problems existing in the prior art, the present invention decomposes the entire processing process into multiple precise steps, and each step is precisely controlled and processed for a specific processing surface or hole. The third reference surface is processed by the fitter scraping to ensure the reference accuracy of subsequent processing; the first lathe, the second lathe and the clamps such as the clamps are used to perform fine turning and fine grinding on each surface and hole of the worktable shell, and strict accuracy and coaxiality correction is performed after each step of processing. In particular, during the processing of the reference hole, the micrometer is precisely corrected and closely matched with the clamp to ensure that the coaxiality after each step of processing is controlled within the allowable range. In addition, auxiliary tools such as equi-high magnetic blocks and regulators are used to further reduce the error accumulation during the processing process, improve the overall processing accuracy, and enhance the processing accuracy and coaxiality of high-precision parts such as the gear hobbing machine combined worktable shell.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 is a cross-sectional schematic diagram of a workbench shell;

[0027] Figure 2It is a cross-sectional schematic diagram of the combination of the workbench shell and the vertical lathe workbench in step S1;

[0028] Figure 3 It is a cross-sectional schematic diagram of the combination of the workbench shell and the vertical lathe workbench in step S2;

[0029] Figure 4 It is a cross-sectional schematic diagram of the combination of the workbench housing and the vertical mill workbench in step S3;

[0030] Figure 5 It is a cross-sectional schematic diagram of the combination of the worktable shell and the vertical mill worktable in step S4.

[0031] Reference numerals:

[0032] 1 workbench housing, 101 first reference surface, 102 second reference surface, 103 third reference surface, 104 reference hole, 2 part receiving plate, 201 outer circle, 3 bolt, 4 first lathe, 5 vertical lathe workbench, 6 fixture, 7 second lathe, 8 micrometer, 9 vertical mill workbench, 10 connecting bolt, 11 connecting plate, 12 adjuster, 13 magnetic block, 15 first series of holes, 16 second series of holes, 17 third series of holes, 18 fourth series of holes. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] See also Figure 1 to Figure 5 , which is a processing method for improving the coaxiality of the spindle string hole of the workbench housing 1. One end of the workbench housing 1 is a first reference surface 101, and the other end is a second reference surface 102. The workbench housing 1 is matched with a part receiving plate 2. The part receiving plate 2 is provided with an outer circle on one side and a string hole on the other side. The outer circle is inserted into the string hole finely turned by the second reference surface 102 to achieve the connection between the workbench housing 1 and the part receiving plate 2;

[0037] The method for processing the holes on the workbench housing 1 comprises the following steps:

[0038] S1, fix the workbench shell 1 on the vertical lathe workbench 5 by the first lathe 4, and sequentially fine-machine the first reference surface 101 at one end of the workbench shell 1, the string hole and the reference hole 104 on the first reference surface 101; the string hole and the reference hole 104 are sequentially arranged from the first reference surface 101 to the inside of the workbench shell 1 and are coaxially connected;

[0039] The workbench shell 1 is provided with a third reference surface 103 located between the first reference surface 101 and the second reference surface 102; before performing step S1, the third reference surface 103 of the workbench shell 1 is first scraped by a bench worker to achieve a precision requirement of at least 12 points / 25X25; and the first lathe 4 is installed on the vertical lathe workbench 5 for fine turning of its top surface; the workbench shell 1 is fixed on the first lathe 4 in such a way that the third reference surface 103 contacts the top surface of the first lathe 4.

[0040] "12 points / 25X25" specifically means that at least 12 contact points are required within an area of ​​25mmX25mm. These contact points represent the actual contact area and uniformity between the surfaces, and are used to evaluate the contact accuracy and surface quality of the workpiece surface after scraping. By controlling the number of contact points after scraping, better stability and accuracy can be ensured during assembly or use of the parts.

[0041] A bolt hole is provided on the first reference surface 101 , and the workbench housing 1 is fixedly connected to the first vehicle tool 4 by fixing the bolt 3 in the bolt hole and penetrating through the third reference surface 103 .

[0042] S2, first install the second lathe 7 on the vertical lathe workbench 5, and fine-turn the top surface of the second lathe 7, then turn the workbench shell 1 180 degrees and place it on the second lathe 7, fix it on the vertical lathe workbench 5 by the clamp 6, calibrate the coaxiality of the reference hole 104, and then fine-turn the second reference surface 102 at the other end of the workbench shell 1 and the string hole on the second reference surface 102; wherein the string hole in step S2 should be ensured to be coaxial with the reference hole 104;

[0043] In some embodiments of the present invention, the clamp 6 is a clamping jaw.

[0044] S3, first install the first tool 4 on the surface of the vertical mill worktable 9, and fine-grind the top surface of the first tool 4; flip the worktable housing 1 180 degrees again, install the worktable housing 1 on the vertical mill worktable 9 through the first tool 4, and fine-grind the first reference surface 101 and the string holes and reference holes 104 thereon after calibrating the coaxiality of the string holes on the first reference surface 101;

[0045] S4, first grind the surface of the magnetic block 13 until the two opposite surfaces on the magnetic block 13 are parallel; set it on the vertical mill worktable in a way that one of the surfaces is in contact with the vertical mill worktable 9, and then flip the worktable shell 1 180° for the third time, contact the magnetic block 13 through the first reference surface 101, so that the worktable shell 1 is fixed on the vertical mill worktable 9 through the magnetic block 13, and then clamp the part receiving plate 2 into the string hole of the second reference surface 102. After correcting the coaxiality of the reference hole 104, fine-grind the string hole on the side of the part receiving plate 2 away from the worktable shell 1 that has been fine-machined until it is coaxial with the reference hole 104.

[0046] In step S4, the first reference surface 101 is connected to the connecting disk 11 by the connecting bolts 10, and then the connecting disk 11 is fixed on the magnetic block 13; the connecting disk 11 is tightened by the adjuster 12 and its position is fine-tuned, and the coaxiality of the reference hole 104 is corrected to 0.003mm with the micrometer 8.

[0047] During calibration, the micrometer 8 is mounted on the side wall of the string hole and / or the reference hole 104 , and the coaxiality of the string hole and / or the reference hole 104 is calibrated by the micrometer 8 .

[0048] The side of the part receiving plate 2 that contacts the workbench shell 1 is set in the form of an outer circle 201, and the other side is provided with a string hole. The outer circle 201 and the string hole have been previously precision-machined, wherein the diameter of the outer circle 201 is consistent with the aperture of the string hole on the second reference surface 102 of the workbench shell 1, leaving only a 0.1mm margin. After the part receiving plate 2 is installed on the workbench shell 1, it is calibrated and precision-ground, which ensures the matching degree between the part receiving plate 2 and the workbench shell 1, facilitates connection, and can also improve the coaxiality of the string hole on the part receiving plate 2 and the reference hole 104.

[0049] In the combined workbench housing 1 of the gear hobbing machine, the workbench housing 1 and the part receiving plate 2 are usually used in combination. The workbench housing 1 usually has structural functions such as containment and support, and is used to accommodate and support other parts of the workbench. The part receiving plate 2 often plays the role of connecting and supporting key parts of the workbench, transmitting torque and bearing loads. In the design of the workbench, the part receiving plate 2 usually cooperates closely with the workbench housing 1 to ensure the stability and functionality of the workbench.

[0050] In step S4, the magnetic block 13 is ground to the same height, which can improve the processing accuracy and subsequent processing efficiency, and can also achieve fast and accurate positioning of the workbench housing 1, which has higher accuracy and stability than the traditional mechanical positioning method. This helps to reduce the positioning error in the processing process and improve the processing accuracy of the parts.

[0051] The first reference plane 101 , the second reference plane 102 , and the third reference plane 103 of the workbench housing 1 are parallel to each other, wherein the third reference plane 103 is an annular reference plane.

[0052] The first vehicle tool 4 is an annular vehicle tool, which matches the annular shape of the third reference surface 103. A groove is provided inside the annular vehicle tool. After the third reference surface 103 of the workbench housing 1 is fitted, the workbench housing 1 is embedded in the groove. The M12 bolt 3 is fixed in the bolt hole, passing through the third reference surface 103 and the top surface of the first vehicle tool 4, so that the workbench housing 1 and the first vehicle tool 4 are fixedly connected.

[0053] In some embodiments of the present invention, the second vehicle tool 7 is a disc vehicle tool, and its surface can cover the surface of the connecting disk 11 to ensure the stability of the workbench housing 1 fixed to the second vehicle tool 7 through the connecting disk 11.

[0054] Example:

[0055] S1, perform bench scraping on the third reference surface 103 of the workbench housing 1 to achieve the accuracy requirement of 12 points / 25X25;

[0056] S2, installing the first lathe 4 on the vertical lathe workbench 5, and finishing the top surface of the annular lathe;

[0057] S3, installing the workbench housing 1 onto the first vehicle tool 4 and connecting them with bolts 3;

[0058] S4, the first reference surface 101 of the workbench housing 1, as well as the first series of holes 15 (￠260), the second series of holes 16 (￠241) and the reference hole 104 (￠175) are finely turned to ensure that the coaxiality of each hole is within 0.01mm, and the margin of each hole is 0.1mm;

[0059] "Leave 0.1mm" means to reserve 0.1mm of extra material on the diameter or size of the hole. When processing holes, a certain material thickness needs to be reserved to avoid the hole size being too small or too large, thereby ensuring the accuracy and reliability of the parts during assembly or use.

[0060] S5, removing the first vehicle tool 4;

[0061] S6, installing the second lathe 7 onto the surface of the vertical lathe workbench 5, and finishing lathe the top surface of the second lathe 7;

[0062] S7, the workbench housing 1 is turned over and placed on the second vehicle 7, the workbench housing 1 is clamped by the fixture 6, and the reference hole 104 of the workbench housing 1 is calibrated by the micrometer 8 so that the coaxiality error does not exceed 0.005 mm;

[0063] According to the general standards in the field of mechanical engineering, the coaxiality tolerance value is usually marked in millimeters. Therefore, if the coaxiality requirement is 0.005, it means that the maximum allowable deviation between the two axis lines is 0.005mm.

[0064] S8, the second reference surface 102, the third series of holes 17 (￠260), and the fourth series of holes 18 (￠215) of the finishing workbench housing 1;

[0065] S9, assemble the parts receiving plate 2 onto the workbench housing 1, so that the outer circle 201 (￠260) of the parts receiving plate 2 is embedded in the third string hole 17 (￠260);

[0066] S10, installing the first lathe 4 on the surface of the vertical grinding table 9, and fine grinding the top surface of the first lathe 4;

[0067] S11, install the workbench housing 1 on the first vehicle 4, tighten it with bolts 3, and use a micrometer 8 to calibrate the fourth string hole 18 of the workbench housing 1 to ensure that the error does not exceed 0.005 mm;

[0068] S12, fine grinding the first reference surface 101, the first series of holes 15 (￠260), the second series of holes 16 (￠241) and the reference hole 104 (￠175) of the worktable housing 1, ensuring that the coaxiality error does not exceed 0.004mm;

[0069] S13, removing the first tool 4 from the vertical mill workbench 9;

[0070] S14, installing the magnetic block 13 on the surface of the vertical grinding table 9 and grinding to the same height;

[0071] S15, installing the connection plate 11 on the workbench housing 1 through the connection bolts 10, and the parallelism of the two surfaces of the connection plate 11 is 0.002 mm;

[0072] Parallelism refers to the degree of parallelism between two planes or two straight lines, and refers to the maximum allowable error of one plane (edge) relative to another plane (edge).

[0073] S16, placing the connection plate 11 and the workbench housing 1 on the equal-height magnetic conductive block 13, and using the adjuster 12 to tighten the connection plate 11;

[0074] S17, using the micrometer 8 to calibrate the reference hole 104 of the workbench housing 1 so that the error does not exceed 0.003 mm;

[0075] S18, fine grinding of the string hole (￠210) of the parts receiving plate 2.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A processing method for improving the coaxiality of the spindle string hole of the worktable housing, Features: One end of the workbench shell (1) is a first reference surface (101), and the other end is a second reference surface (102). A parts receiving plate (2) is matched with the workbench shell (1). One side of the parts receiving plate (2) is provided with an outer circle, and the other side is provided with a string hole. The outer circle is inserted into the string hole finely turned on the second reference surface (102), so as to realize the connection between the workbench shell (1) and the parts receiving plate (2); The method for processing the serial holes on the workbench housing (1) comprises the following steps: S1, fixing the workbench shell (1) on the vertical lathe workbench (5) by means of a first lathe (4), and sequentially fine-turning a first reference surface (101) at one end of the workbench shell (1), a string hole and a reference hole (104) on the first reference surface (101); the string hole and the reference hole (104) are sequentially arranged from the first reference surface (101) to the inside of the workbench shell (1) and are coaxially connected; S2, the workbench shell (1) is turned over 180 degrees and placed on a second lathe (7), fixed on the vertical lathe workbench (5) by a clamp (6), the coaxiality of the reference hole (104) is corrected, and then the second reference surface (102) at the other end of the workbench shell (1) and the string hole on the second reference surface (102) are precision-machined; wherein the string hole in step S2 should be ensured to be coaxial with the reference hole (104); S3, turning the worktable housing (1) 180 degrees again, installing the worktable housing (1) on the vertical grinding worktable (9) by means of the first vehicle (4), and after calibrating the coaxiality of the string holes on the first reference surface (101), fine grinding the first reference surface (101) and the string holes thereon, as well as the reference hole (104); S4, flip the workbench shell (1) 180 degrees for the third time, and make the workbench shell (1) contact with the magnetic block (13) through the first reference surface (101), so that the workbench shell (1) is fixed on the vertical grinding workbench (9) through the magnetic block (13), and then the part receiving plate (2) is clamped into the string hole of the second reference surface (102), and after correcting the coaxiality of the reference hole (104), the string hole on the side of the part receiving plate (2) away from the workbench shell (1) that has been precision-milled is fine-ground until it is coaxial with the reference hole (104).

2. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 1, Features: The workbench shell (1) is provided with a third reference surface (103) located between the first reference surface (101) and the second reference surface (102); before performing step S1, the third reference surface (103) of the workbench shell (1) is firstly scraped by a fitter, and the first lathe (4) is mounted on the vertical lathe workbench (5) to perform fine turning on its top surface; the workbench shell (1) is fixed on the first lathe (4) in such a way that the third reference surface (103) contacts the top surface of the first lathe (4).

3. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 2, Features: The third reference surface (103) is scraped by fitters to at least reach the accuracy requirement of 12 points / 25X25.

4. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 2, Features: The first reference surface (101) is provided with a bolt hole, and the workbench housing (1) is fixedly connected to the first vehicle tool (4) by fixing a bolt (3) in the bolt hole and penetrating the third reference surface (103).

5. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 1, Features: In step S4, the first reference surface (101) is connected to the connection plate (11) via a connection bolt (10), and then the connection plate (11) is fixed on the magnetic conductive block (13).

6. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 5, Features: The connecting plate (11) is tightened and its position is finely adjusted by means of an adjuster (12), and the coaxiality of the reference hole (104) is corrected in cooperation with a micrometer (8).

7. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 6, Features: During calibration, a micrometer (8) is mounted on the side wall of the string hole and / or the reference hole (104), and the coaxiality of the string hole and / or the reference hole (104) is calibrated by the micrometer (8).

8. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 1, Features: Before performing step S2, the second lathe (7) is first mounted on the vertical lathe workbench (5), and the top surface of the second lathe (7) is finish-machined.

9. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 1, Features: Before performing step S3, the first lathe (4) is first mounted on the surface of the vertical grinding workbench (9), and the top surface of the first lathe (4) is finely ground.

10. The processing method for improving the coaxiality of the spindle string hole of the worktable housing according to claim 1, Features: Before performing step S4, the surface of the magnetic conductive block (13) is first ground until two opposite surfaces on the magnetic conductive block (13) are parallel; and the magnetic conductive block (13) is arranged on the vertical grinding workbench (9) in a manner such that one of the surfaces contacts the vertical grinding workbench (9).

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