Large precision rotary table assembly system and assembly method

Abstract

The present application belongs to the technical field of rotary table assembly, in particular to a large-scale precision rotary table assembly system, a workpiece is sequentially arranged from outside to inside as an outer ring, a bearing and an inner ring, comprising: at least three groups of jacking and moving mechanisms, a heating mechanism for heating the outer ring to make it expand, a cooling mechanism for cooling the inner ring to make it shrink, and a detection assembly, wherein the outer ring is placed on an outer support table, the inner ring is placed on an inner support table, the heating mechanism is controlled to heat the outer ring, the cooling mechanism is controlled to cool the inner ring, and a sensor monitors the outer ring and the inner ring to reach a deformation amount index, and then the bearing is installed between the outer ring and the inner ring. In the large-scale precision rotary table assembly system, the outer ring is heated by the heating mechanism, the inner ring is cooled by the cooling mechanism, and the detection assembly detects that the outer ring and the inner ring reach a predetermined deformation amount, and then the interference assembly of the outer ring, the bearing and the inner ring is completed, the system control is traceable, the operation precision is high, and the expert experience is not needed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rotary table assembly, and particularly relates to a large-scale precision rotary table assembly system and an assembly method of the large-scale precision rotary table assembly system. BACKGROUND

[0002] The assembly of the large-scale precision rotary table is generally performed by using the principle of thermal expansion and cold contraction of materials, that is, the assembly between the inner ring and the bearing, and the assembly between the outer ring and the bearing. However, the use of high-pressure liquid nitrogen (temperature of-196℃ under normal pressure) to freeze the inner ring has a great hidden danger in operation safety, high process cost and harm to the precision bearing, and requires a special operation place and process equipment.

[0003] Therefore, it is necessary to develop a large-scale precision rotary table assembly system to meet the development requirements of the large-scale precision rotary table. SUMMARY

[0004] The present application proposes the following technical solutions to solve the problems in the prior art.

[0005] The large-scale precision rotary table assembly system comprises a workpiece, the workpiece is sequentially provided with an outer ring, a bearing and an inner ring from outside to inside, and comprises:

[0006] The number of the jacking and moving mechanisms is at least three, the jacking and moving mechanisms are arranged in parallel to the radial direction of the workpiece and are distributed in a ring shape at equal distances with the center of the workpiece as the center, the jacking and moving mechanism comprises a sliding plate one, the upper end of the sliding plate one is provided with a stand, the sliding plate two is reciprocally moved relative to the stand and located on both sides of the stand, the end surface of the sliding plate two is provided with a jacking electric cylinder, and the output end of the jacking electric cylinder is provided with a support table.

[0007] The heating mechanism for heating the outer ring to make it expand;

[0008] The cooling mechanism for cooling the inner ring to make it shrink;

[0009] The detection assembly comprises a sensor for detecting the deformation amount of the outer ring and the inner ring.

[0010] The outer ring is placed on the outer support table, the inner ring is placed on the inner support table, the heating mechanism is controlled to heat the outer ring, the cooling mechanism is controlled to cool the inner ring, and the sensor monitors the outer ring and the inner ring to reach the deformation amount index, and then the bearing is installed between the outer ring and the inner ring.

[0011] As the preferred technical scheme of the above, the sliding plate one is provided with a driving element one, the output end of the driving element one is connected with a screw rod one, the screw rod one is threadedly matched with a threaded block connected with the sliding plate two, and the sliding plate one is slidably matched with the sliding plate two.

[0012] As the preferred technical scheme of the above, the system further comprises an operation table and a bottom plate.

[0013] The jacking and horizontal moving mechanism further comprises a base plate connected with the bottom plate, the sliding plate one is slidably matched with the base plate, the base plate is provided with a driving element two, the output end of the driving element two is connected with a screw rod two, and the screw rod two is threadedly connected with a threaded block two connected with the sliding plate one.

[0014] As the preferred technical scheme of the above, the heating mechanism comprises L-shaped plates one oppositely arranged on both sides of the outer ring, the L-shaped plates one are matched with the shape of the outer ring, the vertical segments of the L-shaped plates one are provided with heating belts on the side close to the outer ring, and the horizontal segments of the L-shaped plates one cover the outer ring and are connected with electric push rods one, which are detachably connected with the suspended top plate.

[0015] As the preferred technical scheme of the above, the L-shaped plates one and the heating belts therebetween are provided with elastic layers one and heat insulation plates.

[0016] The end surface of the horizontal segment of the L-shaped plate one is connected with a sleeve one, the end of the electric push rod one is inserted into the sleeve one, and a threaded hole formed in the sleeve one is threadedly matched with a bolt one for fixing the electric push rod one.

[0017] As the preferred technical scheme of the above, the cooling mechanism comprises L-shaped plates two oppositely arranged on both sides of the inner ring, the vertical segments of the L-shaped plates two are provided with grooves one, and cold sources are placed in the grooves one.

[0018] The vertical segment side wall of the L-shaped plate two close to the inner ring is provided with elastic layers two, the horizontal segments of the L-shaped plates two cover the inner ring and are connected with electric push rods two, which are detachably connected with the suspended top plate.

[0019] The end surface of the horizontal segment of the L-shaped plate two is connected with a sleeve two, the movable end of the electric push rod two is inserted into the sleeve two, and a threaded hole formed in the sleeve two is threadedly matched with a bolt two for fixing the electric push rod two.

[0020] As the preferred technical scheme of the above, the end surface of the horizontal segment of the L-shaped plate two is provided with a groove two for accommodating the sleeve two, the sleeve two is sequentially sleeved with a spring, a cover plate and a nut from bottom to top, and a threaded segment matched with the nut is formed in the side wall of the sleeve two.

[0021] The assembly method of the large-scale precision rotary table assembly system comprises the following steps,

[0022] S1. Place the outer ring on the external support table and the inner ring on the internal support table;

[0023] S2. Control the heating mechanism to heat the outer ring and the cooling mechanism to cool the inner ring, and simultaneously, the detection assembly detects the deformation of the outer ring and the inner ring;

[0024] S3. After the outer ring and the inner ring reach the predetermined deformation, place the bearing between the outer ring and the inner ring to complete the interference assembly of the outer ring, bearing, and inner ring.

[0025] The beneficial effects of the present application are:

[0026] 1. In the large precision rotary table assembly system, the outer ring is heated by the heating mechanism, the inner ring is cooled by the cooling mechanism, and after the detection assembly detects that the outer ring and the inner ring reach the predetermined deformation, the interference assembly of the outer ring, bearing, and inner ring is completed. System control, results can be traced, high operation precision, no need to rely too much on expert experience.

[0027] 2. The system can also be used for workpiece disassembly, suitable for the case where the inner ring and the outer ring need to be disassembled with the bearing after static test and other examinations during the development stage of the rotary table, realizing non-destructive interference disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure schematic diagram of the large precision rotary table assembly system in Example 1 is shown.

[0029] Figure 2 The structure schematic diagram of the inner lifting and moving mechanism is shown. Figure 1

[0030] Figure 3 The structure schematic diagram of the large precision rotary table assembly system in Example 2 is shown.

[0031] Figure 4 The structure schematic diagram of the heating mechanism is shown. Figure 3

[0032] Figure 5 The structure schematic diagram of the cooling mechanism is shown. Figure 3

[0033] ​​​The drawings are marked: operating platform 10, bottom plate 20, jacking and moving mechanism 30, sliding plate one 311, sliding plate two 312, driving part one 313, screw one 314, jacking electric cylinder 315, support table 316, stand column 317, base plate 321, driving part two 322, screw two 323, heating mechanism 40, electric push rod one 41, L-shaped plate one 42, elastic layer one 43, heat insulation plate 44, heating belt 45, sleeve one 46, bolt one 47, cooling mechanism 50, electric push rod two 51, L-shaped plate two 52, groove one 521, groove two 522, cover plate 53, sleeve two 54, threaded section 541, nut 55, bolt two 56, spring 57, outer ring 61, inner ring 62, detection assembly 70, sensor 71. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in conjunction with embodiments. EMBODIMENT

[0035] The large precision rotary table assembly system comprises a workpiece, the workpiece is sequentially provided from the outside to the inside as an outer ring 61, a bearing and an inner ring 62, and comprises:

[0036] The jacking and moving mechanism 30 is provided in parallel to the radial direction of the workpiece and is distributed in a ring shape at equal distances with the center of the workpiece as the center, the jacking and moving mechanism 30 comprises a sliding plate one 311, the upper end of the sliding plate one 311 is provided with a stand column 317, a sliding plate two 312 is located on both sides of the stand column 317 and reciprocally moves relative to the stand column 317, the sliding plate two 312 drives the position of a jacking electric cylinder 315 and a support table 316 to change, which is suitable for the size change of the outer ring 61 expansion and the inner ring 62 shrinkage in the assembly process, and is also suitable for the assembly requirement of workpieces with different sizes and small size difference, the end surface of the sliding plate two 312 is provided with the jacking electric cylinder 315, the output end of the jacking electric cylinder 315 is provided with the support table 316, the jacking electric cylinder 315 is provided to change the height of the workpiece by elongating or shortening its length in the process of workpiece assembly, so as to meet the requirement of workpiece position change in the assembly process;

[0037] The heating mechanism 40 is used to heat the outer ring 61 to make it expand;

[0038] The cooling mechanism 50 is used to cool the inner ring 62 to make it shrink;

[0039] The detection assembly 70 comprises a sensor 71 used to detect the deformation amount of the outer ring 61 and the inner ring 62, wherein the deformation amount index is set according to the interference amount and the gap requirement in the assembly process, and the sensor 71 can be installed on the stand column 317;

[0040] Wherein, the outer ring 61 is placed on the outer support table 316, the inner ring 62 is placed on the inner support table 316, the heating mechanism 40 is controlled to heat the outer ring 61, the cooling mechanism 50 is controlled to cool the inner ring 62, and the sensor 71 monitors the outer ring 61 and the inner ring 62 to reach the deformation amount index, and then the bearing is installed between the outer ring 61 and the inner ring 62.

[0041] The assembly method of the large precision rotary table assembly system comprises the following steps,

[0042] S1. The outer ring 61 is placed on the outer support table 316, and the inner ring 62 is placed on the inner support table 316;

[0043] S2. The heating mechanism 40 is controlled to heat the outer ring 61, the cooling mechanism 50 is controlled to cool the inner ring 62, and the detection assembly 70 detects the deformation amount of the outer ring 61 and the inner ring 62;

[0044] S3. After the outer ring 61 and the inner ring 62 reach the predetermined deformation amount, the bearing is placed between the outer ring 61 and the inner ring 62, the column 317 supports the bearing, and the interference assembly of the outer ring 61, the bearing and the inner ring 62 is completed.

[0045] In the large precision rotary table assembly system, the outer ring 61 is heated by the heating mechanism 40, the inner ring 62 is cooled by the cooling mechanism 50, and the detection assembly 70 detects that the outer ring 61 and the inner ring 62 reach the predetermined deformation amount, and then the interference assembly of the outer ring 61, the bearing and the inner ring 62 is completed. The system control is traceable, the operation precision is high, and it does not need to rely too much on expert experience.

[0046] Meanwhile, the system can also be used for workpiece disassembly, and is suitable for the case that the inner ring 62 and the outer ring 61 need to be disassembled from the bearing after static test and other examinations in the rotary table development stage, so as to realize non-destructive interference disassembly.

[0047] The disassembly method of the large precision rotary table assembly system comprises the following steps,

[0048] S1. The workpiece is placed on the jacking and moving mechanism 30, wherein the outer ring 61 is located at the outer support table 316, the inner ring 62 is located at the inner support table 316, and the bearing is located at the column 317;

[0049] S2. The heating mechanism 40 is controlled to heat the outer ring 61, the cooling mechanism 50 is controlled to cool the inner ring 62, and the detection assembly 70 detects the deformation amount of the outer ring 61 and the inner ring 62;

[0050] S3. After the outer ring 61 and the inner ring 62 reach the predetermined deformation amount, the jacking cylinder 315 is controlled to elongate or shorten, so that the position of the outer ring 61 and the inner ring 62 changes, and the disassembly of the outer ring 61, the bearing and the inner ring 62 is completed.

[0051] As Figure 2 shown, the sliding plate one 311 is provided with a driving member one 313, the driving member one 313 can be provided as a forward and reverse motor, the output end of the driving member one 313 is connected with a screw rod one 314, the screw rod one 314 is threadedly matched with a threaded block connected with the sliding plate two 312, the sliding plate one 311 is in sliding fit with the sliding plate two 312; the driving member one 313 drives the screw rod one 314 to rotate through forward and reverse rotation, and through the restriction of the sliding fit of the sliding plate one 311 and the sliding plate two 312, the threaded block and the sliding plate two 312 are driven to make linear motion on the sliding plate one 311.

[0052] Further comprising an operation table 10, a bottom plate 20 provided with the center point coinciding with the center point of the workpiece, the operation table 10 internally stores the deformation amount information of the workpiece, the information detected in the detection assembly 70 is transmitted to the operation table 10, and the operation table 10 judges whether the deformation amount is reached; at the same time, the closing or opening of the heating mechanism 40 and the cooling mechanism 50, the driving member one 313 and the driving member two 322 can be operated at the operation table 10.

[0053] The jacking and transverse moving mechanism 30 further comprises a base plate 321 connected with the bottom plate 20, the sliding plate one 311 is in sliding fit with the base plate 321, the base plate 321 is provided with a driving member two 322, the output end of the driving member two 322 is connected with a screw rod two 323, and the screw rod two 323 is threadedly connected with a threaded block two connected with the sliding plate one 311;

[0054] The driving member two 322 can be provided as a forward and reverse motor, the driving member two 322 drives the screw rod two 323 to synchronously rotate through forward and reverse rotation, and through the restriction of the sliding fit of the sliding plate one 311 and the base plate 321, the threaded block two and the sliding plate one 311 are driven to reciprocate in the radial direction of the workpiece;

[0055] The sliding plate one 311 can drive the support table 316 and the column 317 to move in the radial direction of the workpiece, so as to adapt to the assembly and disassembly of the workpieces with large size difference and different inner diameters; before the assembly and disassembly of the workpiece, the support table 316 and the column 317 are first adjusted to the appropriate position according to the size of the workpiece. Embodiment

[0056] By analogy with embodiment 1, as Figure 3 , Figure 4As shown, the heating mechanism 40 includes the L-shaped plate one 42 arranged on both sides of the outer ring 61, the L-shaped plate one 42 is matched with the shape of the outer ring 61, and the vertical section of the L-shaped plate one 42 is provided with a heating belt 45 close to one side of the outer ring 61. In order to meet the change of deformation amount when the outer ring 61 expands, the total length of the heating belt 45 is greater than the circumference length of the inner wall of the vertical section of the L-shaped plate one 42. The heating belt 45 can be provided as a ceramic heating belt. The horizontal section of the L-shaped plate one 42 covers the outer ring 61 and is connected with the electric push rod one 41. The electric push rod one 41 is detachably connected with the suspended top plate. Specifically, the electric push rod one 41 can be installed at any position of the top plate through screw connection or other methods. The position is adjusted according to the position of the workpiece during processing of workpieces of different sizes. The setting of the horizontal section of the L-shaped plate one 42 covers the outer ring 61, reduces the loss of heat, and at the same time, the position of the outer ring 61 is fixed by abutting against the upper end of the outer ring 61, thereby improving the stability of the workpiece during assembly and disassembly.

[0057] In the heating mechanism 40, after the workpiece is placed in place, the overall length of the electric push rod one 41 is controlled to be elongated, thereby driving the L-shaped plate one 42 and the heating belt 45 to move to the outer ring 61. The heating belt 45 contacts the outer ring 61 to heat it.

[0058] When the outer ring 61 is heated, the L-shaped plate one 42 on both sides is controlled to move to the outer ring 61, and the heating belts 45 on both sides work. When the bearing is assembled between the outer ring 61 and the inner ring 62, or when the workpiece is disassembled, the L-shaped plate one 42 on the outer side is controlled to move to the outer ring 61, and the heating belt 45 on the outer side works.

[0059] As shown in the figure, Figure 4 The elastic layer one 43 and the heat insulation plate 44 are arranged between the L-shaped plate one 42 and the heating belt 45. The elastic layer one 43 is deformed to make the heating belt 45 tightly contact the outer ring 61. The heat insulation plate 44 blocks the heat generated by the heating belt 45, so that the heat generated by the heating belt 45 is used for the outer ring 61, thereby improving the heat utilization rate. In order to meet the deformation requirement, the heat insulation plate 44 can be discontinuous at the head and tail, or multiple heat insulation plates 44 can be arranged without being connected with each other.

[0060] As shown in the figure, Figure 4 The end surface of the horizontal section of the L-shaped plate one 42 is connected with the sleeve one 46, the end of the electric push rod one 41 is inserted into the sleeve one 46, and the threaded hole formed in the sleeve one 46 is threadedly connected with the bolt one 47 for fixing the electric push rod one 41. The sleeve one 46 and the bolt one 47 are movably connected between the L-shaped plate one 42 and the electric push rod one 41. Different sizes of L-shaped plate one 42 can be selected according to different sizes of workpieces.

[0061] As shown in the figure, Figure 3 ,Figure 5 As shown, the cooling mechanism 50 includes the L-shaped plate two 52 arranged on both sides of the inner ring 62, and the vertical section of the L-shaped plate two 52 is provided with a groove one 521, and the cold source is placed in the groove one 521. In this embodiment, the cold source is set as dry ice particles;

[0062] The vertical section of the L-shaped plate two 52 close to the inner ring 62 is provided with an elastic layer two. The elastic layer two is arranged to keep the L-shaped plate two 52 in close contact with the inner ring 62 by using the deformation characteristics of the elastic layer two, so as to ensure energy transmission. The horizontal section of the L-shaped plate two 52 covers the inner ring 62 and is connected with the electric push rod two 51. The electric push rod two 51 is detachably connected with the suspended top plate. Specifically, the electric push rod two 51 can be installed at any position of the top plate by screw connection or other methods, and the position is adjusted according to the position of the workpiece during processing of different sizes. The horizontal section of the L-shaped plate two 52 covers the inner ring 62, which reduces energy loss. At the same time, the horizontal section of the L-shaped plate two 52 is in abutment with the top of the inner ring 62, which fixes the position of the inner ring 62 and improves the stability during assembly and disassembly.

[0063] In the cooling mechanism 50, after the workpiece is placed in place, the overall length of the electric push rod two 51 is controlled to be elongated, which drives the L-shaped plate two 52 to move to the position of the inner ring 62. The cold source is placed in the groove one 521 to cool the inner ring 62.

[0064] When only the inner ring 62 is cooled, the L-shaped plate two 52 on both sides of the inner ring 62 is moved to the position, and the cold source on both sides works. When the bearing is assembled between the outer ring 61 and the inner ring 62, or the workpiece is disassembled, only the L-shaped plate two 52 on the inner side is moved to the position, and the cold source on the inner side works alone.

[0065] As shown in the figure, Figure 5 The end surface of the horizontal section of the L-shaped plate two 52 is connected with the sleeve two 54, the movable end of the electric push rod two 51 is inserted into the sleeve two 54, and the threaded hole of the sleeve two 54 is threadedly connected with the bolt two 56 for fixing the electric push rod two 51. The sleeve two 54 and the bolt two 56 are movably connected between the L-shaped plate two 52 and the electric push rod two 51, so that different sizes of L-shaped plate two 52 can be selected according to the different sizes of the workpiece.

[0066] As shown in the figure, Figure 5 The end surface of the horizontal section of the L-shaped plate two 52 is provided with a groove two 522 for accommodating the sleeve two 54. The sleeve two 54 is sequentially sleeved with a spring 57, a cover plate 53 and a nut 55 from bottom to top. The sidewall of the sleeve two 54 is provided with a threaded section 541 matched with the nut 55.

[0067] The cover plate 53 covers the groove 521, reduces the energy waste of the internal cold source, and opens the cover plate 53, rotates the nut 55 on the sleeve 54, and moves upward under the action of the spring 57. The cover plate 53 is lifted, and a gap is formed between the cover plate 53 and the opening end of the groove 521. When the cover plate 53 is closed, the nut 55 is rotated and moved downward on the sleeve 54, and the cover plate 53 is in contact with the opening end of the groove 521 under the limiting action of the nut 55. At this time, the spring 57 is extruded.

[0068] The above examples are only used to illustrate the technical solutions of the present application, but not limit them.

Claims

1. A large precision rotary table assembly system, comprising a workpiece, the workpiece is sequentially provided from outside to inside as an outer ring (61), a bearing, and an inner ring (62), characterized in that, The utility model relates to a kind of lifting and moving mechanism of at least three groups of quantity, the lifting and moving mechanism (30) is arranged in parallel to workpiece radial direction, and is equidistant annular distribution with workpiece center as center, the lifting and moving mechanism (30) includes slide plate one (311), the upper end of slide plate one (311) is provided with stand (317), slide plate two (312) is located in the both sides of stand (317) and reciprocating relative to stand (317), the end surface of slide plate two (312) is provided with lifting electric cylinder (315), the output end of lifting electric cylinder (315) is provided with support platform (316); Heating mechanism (40) for heating outer ring (61) to make it expand; Cooling mechanism (50) for cooling inner ring (62) to make it shrink; Detection assembly (70) includes sensor (71) for detecting deformation amount of outer ring (61) and inner ring (62); Wherein, outer ring (61) is placed on outer support platform (316), inner ring (62) is placed on inner support platform (316), heating mechanism (40) is controlled to heat outer ring (61), cooling mechanism (50) is controlled to cool inner ring (62), sensor (71) monitors outer ring (61) and inner ring (62) to reach deformation amount index, bearing is installed between outer ring (61) and inner ring (62); The heating mechanism (40) includes oppositely arranged L-shaped plate one (42) on both sides of the outer ring (61), the L-shaped plate one (42) is matched with the shape of the outer ring (61), the vertical section of the L-shaped plate one (42) is provided with a heating belt (45) close to one side of the outer ring (61), the horizontal section of the L-shaped plate one (42) covers the outer ring (61) and is connected with an electric push rod one (41), and the electric push rod one (41) is detachably connected with the suspended top plate. An elastic layer one (43) and a heat insulation plate (44) are arranged between the L-shaped plate one (42) and the heating belt (45); a sleeve one (46) is connected to the end face of the horizontal section of the L-shaped plate one (42), the end of the electric push rod one (41) is inserted into the sleeve one (46), and a bolt one (47) for fixing the electric push rod one (41) is threadedly matched in the threaded hole formed in the sleeve one (46); The cooling mechanism (50) includes oppositely arranged L-shaped plate two (52) on both sides of the inner ring (62), the vertical section of the L-shaped plate two (52) is provided with a groove one (521), and a cold source is placed in the groove one (521); an elastic layer two is arranged on the vertical section side wall of the L-shaped plate two (52) close to the inner ring (62), and the horizontal section of the L-shaped plate two (52) covers the inner ring (62) and is connected with an electric push rod two (51), and the electric push rod two (51) is detachably connected with the suspended top plate. A driving part one (313) is arranged on the slide plate one (311), the output end of the driving part one (313) is connected with a screw rod one (314), the screw rod one (314) is threadedly matched with a threaded block connected with the slide plate two (312), and the slide plate one (311) is slidingly matched with the slide plate two (312).

2. The large precision turntable assembly system of claim 1, wherein, ​ 3. The large precision turntable assembly system of claim 2, wherein, It also includes the operating platform (10) and the bottom plate (20); The jacking and transverse moving mechanism (30) further comprises a base plate (321) connected with the bottom plate (20), the sliding plate (311) is in sliding fit with the base plate (321), the base plate (321) is provided with a driving element (322), the output end of the driving element (322) is connected with a screw rod (323), the screw rod (323) is threadedly connected with a threaded block (two) connected with the sliding plate (311).

4. The large precision turntable assembly system of claim 1, wherein, The end face of the horizontal section of the L-shaped plate (52) is connected with a sleeve (54), the movable end of the electric push rod (51) is inserted into the sleeve (54), the threaded hole in the sleeve (54) is threadedly fitted with a bolt (56) for fixing the electric push rod (51).

5. The large precision turntable assembly system of claim 4, wherein, The end face of the horizontal section of the L-shaped plate (52) is provided with a groove (522) for accommodating the sleeve (54), the sleeve (54) is sequentially sleeved with a spring (57), a cover plate (53) and a nut (55) from bottom to top, and the side wall of the sleeve (54) is provided with a threaded section (541) matched with the nut (55).

6. The assembly method of the large precision rotary table assembly system according to any one of claims 1-5, characterized in that, It comprises the following steps, S1. Place the outer ring (61) on the external support table (316) and the inner ring (62) on the internal support table (316); S2. Control the heating mechanism (40) to heat the outer ring (61) and control the cooling mechanism (50) to cool the inner ring (62), and at the same time, the deformation amount of the outer ring (61) and the inner ring (62) is detected by the detection assembly (70); S3. After the outer ring (61) and the inner ring (62) reach the predetermined deformation amount, the bearing is placed between the outer ring (61) and the inner ring (62), and the interference assembly of the outer ring (61), the bearing and the inner ring (62) is completed.

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