A high-precision adjusting device for spherical thrust bearing and a method for using the same

Abstract

The application discloses a high-precision adjusting device for a spherical thrust bearing and a use method thereof. The high-precision adjusting device for the spherical thrust bearing comprises a grinding and matching tool and a high-precision detection platform. The spherical thrust bearing comprises detachably assembled spherical supporting blocks and thrust pads. The top surface of the grinding and matching tool is provided with an assembly groove for inverting installation of the spherical supporting blocks, and the top surface of the assembly groove is attached to the top plane of the spherical supporting blocks. The center of the assembly groove is provided with a spherical installation groove for placing the top spherical surface of the spherical supporting blocks. The inner wall of the assembly groove is circumferentially provided with adjusting bolts, the adjusting bolts are equal in spacing, and the directions of the adjacent adjusting bolts are perpendicular to each other for clamping and limiting the side wall of the spherical supporting blocks. The top surface of the high-precision detection platform is used for placing the spherical thrust bearing and detecting the detection size data of the spherical thrust bearing. The grinding amount is directly measured, the influence of traditional calculation errors and measurement errors is avoided, and the high-precision adjusting device has the advantages of high measurement accuracy, strong repeatability and convenience and rapidness.

Description

TECHNICAL FIELD

[0001] The application relates to the field of spherical thrust bearing manufacturing precision, in particular to a high-precision adjusting device for a spherical thrust bearing and a use method thereof. BACKGROUND

[0002] At present, with the rapid development of the ship industry, combined spherical thrust bearings are widely used in domestic large ship gearboxes to bear the forward and reverse thrust of the propeller of the entire ship. The forward and reverse main thrust bearings are located on both sides of the thrust flange plate at the output end of the gearbox, and each side usually consists of N (usually 9-15) spherical thrust bearings of the same structure. The spherical thrust bearing comprises a spherical support block and a thrust pad. The spherical support block is arranged in the top groove of the thrust pad, and the bottom plane of the spherical support block is attached to the top surface of the thrust pad groove. The top surface of the spherical support block comprises a spherical protrusion arranged at the center and an annular plane arranged around the spherical protrusion.

[0003] The lower end surface of the thrust pad is plated with a certain thickness of tin-based alloy, and the spherical support block is assembled into the inner hole of the thrust pad through a transition fit. In order to ensure that each thrust bearing of the spherical thrust bearing can bear uniform axial thrust when the ship is sailing, the height dimension of each thrust bearing is ground to achieve a precision requirement of 3 levels or above (tolerance within 0.005 mm). However, since the spherical thrust bearing is a combined structure, the adjustment allowance is arranged on the lower end surface of the spherical support block, so that the spherical thrust bearing cannot adopt the assembly adjustment technology of "assembling first and then grinding", but can only adopt the assembly adjustment technology of "assembling first, then detecting, then grinding, and then assembling again" in a cycle mode. Any relative error in any of the assembly process, detection process and grinding process will seriously affect the assembly precision of the spherical thrust bearing. At present, the existing assembly adjustment technology has the following shortcomings and deficiencies:

[0004] Firstly, the grinding tooling is simple and thin, and the distance between the spherical surface of the spherical support block and the grinding bed workbench is relatively close. In the grinding process, the grinding bed workbench magnetic disk is easily deformed due to the magnetic force and grinding force, and the size precision of the upper end plane of the spherical support block changes greatly after each grinding, which makes it difficult to ensure the machining precision of the grinding.

[0005] Secondly, the clamping, detection and assembly positions of the spherical thrust bearing are different each time, and the randomness is large. The number of grinding, assembly and detection in the assembly adjustment process is large, the adjustment efficiency is low, the scrap rate is high, and it is not conducive to mass production.

[0006] Third, the thrust bearing diameter is relatively large relative to its height. Due to the structural limitations of the outside micrometer, a larger outside micrometer must be used to measure the thickness of the thrust bearing. This results in large measurement errors, poor repeatability and accuracy, and indirect calculation errors when calculating the grinding amount of the spherical support block, which is not conducive to the adjustment of high-precision assembly dimensions.

[0007] Fourth, due to the combined influence of processing error, assembly error and measurement error, the assembly dimensional accuracy is unstable. Simply by reducing the assembly accuracy of the combined thrust bearing and selecting thrust bearings on the front and rear surfaces, ensuring the minimum height difference of the thrust bearings on each side (generally 0.02-0.03mm) and assembling in a descending order to achieve the contact spot inspection of the thrust bearing, the assembly efficiency is low, the manufacturing cost is high, and the assembly accuracy is not guaranteed.

[0008] Fifth, the alloy surface of the thrust bearing bus is a consumable part and will wear out after running throughout the life cycle of the actual ship. When the axial clearance of the thrust bearing exceeds the design requirements, it will be replaced. The interchangeability is poor, which is not conducive to maintenance and has high maintenance costs.

[0009] Currently, there is no effective adjustment device (detection device, grinding device) and adjustment method to achieve high-precision detection, high-precision grinding and high-precision assembly of combined spherical thrust bearings.

[0010] Therefore, how to provide a reasonable and reliable high-precision assembly adjustment solution to solve the above technical problems is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0011] The purpose of this application is to provide a high-precision adjustment device for a spherical thrust bearing and a method for using the same.

[0012] To achieve the above-mentioned purpose, the present application provides a high-precision adjustment device for a spherical thrust bearing, comprising: a grinding and fitting tooling and a high-precision detection platform; the spherical thrust bearing comprises: a spherical support block and a thrust pad that can be detachably assembled;

[0013] An assembly groove is provided on the top surface of the grinding and fitting tooling for inverted installation of the spherical support block, with the top plane of the spherical support block fitted against the bottom surface of the assembly groove; a spherical mounting groove is provided in the center of the assembly groove for placing the top sphere of the spherical support block; adjusting bolts are distributed circumferentially on the inner wall of the assembly groove, with equal spacing between the adjusting bolts and vertical directions of adjacent adjusting bolts to tighten the side walls of the limiting spherical support block; the top surface of the high-precision detection platform is used to place the spherical thrust bearing and detect its detection dimension data.

[0014] In some embodiments, a fixing piece is provided through the bottom of the installation groove in a vertical direction, and the fixing piece is used to install the spherical support block in the assembly groove.

[0015] In some embodiments, the high-precision detection platform comprises a dial gauge, a plane positioning plate and an assembly platform;

[0016] The dial gauge is arranged on the top surface of the assembly platform, and the plane positioning plate is horizontally arranged on the top surface of the assembly platform;

[0017] The top surface of the plane positioning plate is used for placing the spherical thrust bearing and detecting the size data of the spherical thrust bearing.

[0018] In some embodiments, the high-precision detection platform further comprises a standard test block, which is used to be placed on the top surface of the plane positioning plate to cooperate with the dial gauge to ensure the assembly precision of the high-precision detection platform.

[0019] A high-precision adjustment method, characterized by being applied to a high-precision adjustment device for a spherical thrust bearing, comprising:

[0020] A grinding and fitting tool and a high-precision detection platform; the spherical thrust bearing comprises a detachable spherical support block and a thrust pad;

[0021] A fitting groove is arranged on the top surface of the grinding and fitting tool, so as to provide a space for the inverted installation of the spherical support block, and the top surface of the spherical support block is arranged to be in close contact with the bottom surface of the fitting groove; a spherical mounting groove for placing the top spherical surface of the spherical support block is arranged in the center of the fitting groove; the inner wall of the fitting groove is circumferentially provided with adjusting bolts, the adjusting bolts are used to have equal spacing and the directions of adjacent adjusting bolts are perpendicular to each other, so as to tightly position the side wall of the spherical support block; and the top surface of the high-precision detection platform is used for placing the spherical thrust bearing and detecting the size data of the spherical thrust bearing.

[0022] The adjustment method comprises:

[0023] After the spherical thrust bearing is placed on the surface of the high-precision detection platform, the positioning marks of the spherical support block and the thrust pad and the positioning marks of the thrust pad and the plane positioning plate are determined;

[0024] The grinding amount of the spherical support block is obtained;

[0025] After the grinding and fitting tool is assembled with the spherical support block, the positioning marks of the grinding and fitting tool and the spherical support block and the positioning marks of the grinding and fitting tool and the grinding platform are determined;

[0026] The spherical support block is ground according to the grinding amount;

[0027] After the grinding of the spherical support block is completed, the spherical thrust bearing is assembled, and the spherical thrust bearing is placed on the surface of the high-precision detection platform according to the positioning marks;

[0028] It is judged by the high-precision detection platform whether the height size of the ground spherical thrust bearing is qualified;

[0029] If the height size of the spherical thrust bearing after assembly is qualified, the height adjustment of the spherical thrust bearing is qualified.

[0030] In some embodiments, the high-precision detection platform comprises a dial gauge, a plane positioning plate and an assembly platform;

[0031] The dial gauge is arranged on the top surface of the assembly platform, and the plane positioning plate is horizontally arranged on the top surface of the assembly platform;

[0032] The top surface of the plane positioning plate is used to place the spherical thrust bearing and detect the size data of the spherical thrust bearing;

[0033] The high-precision detection platform further comprises a standard test block, which is used to be placed on the top surface of the plane positioning plate to cooperate with the dial gauge to ensure the assembly precision of the high-precision detection platform;

[0034] The high-precision detection platform is characterized in that, when the spherical thrust bearing is placed on the surface of the high-precision detection platform, the positioning marks of the spherical support block and the thrust pad and the positioning marks of the thrust pad and the plane positioning plate are determined, comprising:

[0035] Assembling the spherical thrust bearing;

[0036] The high-precision detection platform is assembled with high precision, and the center of the outer circle of the bottom surface of the spherical thrust bearing is used as a reference to identify two mutually perpendicular straight lines.

[0037] In some embodiments, the grinding amount of the spherical support block is obtained, comprising:

[0038] When the spherical thrust bearing is arranged on the surface of the plane positioning plate, the positioning marks of the thrust pad and the top surface of the plane positioning plate are aligned;

[0039] The dial gauge needle is arranged towards the top end of the spherical support block, the spherical thrust bearing is pushed along the two straight lines respectively, and the two maximum readings of the dial gauge during the movement along the two straight lines are recorded;

[0040] The grinding amount is directly read by using the maximum readings of the dial gauge and the up-down deviation value of the spherical thrust bearing.

[0041] In some embodiments, a fixing member is arranged through the bottom of the installation groove in the vertical direction, and the fixing member is used to install the spherical support block in the assembly groove, and the high-precision detection platform is characterized in that, when the grinding and matching tool is assembled with the spherical support block, the positioning marks of the grinding and matching tool and the spherical support block and the positioning marks of the grinding and matching tool and the grinding platform are determined, comprising:

[0042] The grinding and matching tool and the spherical support block are assembled with high precision;

[0043] The annular positioning line and the position mark are correspondingly arranged on the outer circular surface of the grinding and matching tool and the surface of the grinding platform;

[0044] The assembled grinding and matching tool and the grinding platform are matched and installed.

[0045] In some embodiments, if the height dimension of the spherical thrust bearing is not qualified, further comprising:

[0046] Repeating the adjustment of the spherical support block.

[0047] In some embodiments, if the height dimension of the ground spherical thrust bearing is qualified, after the height adjustment of the spherical thrust bearing is qualified, further comprising: four point position punch anti-looseness of the spherical thrust bearing at the position of the positioning mark of the thrust pad and the spherical support block.

[0048] With respect to the above background technology, the application is provided with a grinding and matching tool and a high-precision detection platform; the spherical thrust bearing comprises a detachable spherical support block and a thrust pad; the top surface of the grinding and matching tool is provided with an assembly groove for inverted installation of the spherical support block, and the top surface of the spherical support block is arranged in close contact with the bottom surface of the assembly groove; the center of the assembly groove is provided with a spherical mounting groove for placing the top spherical surface of the spherical support block; the inner wall of the assembly groove is circumferentially distributed with adjusting bolts, the adjusting bolts are equal in spacing, and the directions of adjacent adjusting bolts are perpendicular to each other to tightly limit the side wall of the spherical support block; and the top surface of the high-precision detection platform is used for placing the spherical thrust bearing and detecting the detection dimension data thereof. The grinding amount is directly measured, avoiding the influence of traditional calculation error and measurement error, and having the advantages of high measurement accuracy, strong repeatability and convenience.

[0049] The application also provides a high-precision adjustment method applied to the above-mentioned spherical thrust bearing high-precision adjustment device, having the above-mentioned beneficial effects, which will not be expanded herein. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0051] Figure 1 The assembly schematic view of the grinding and matching tool and the spherical support block provided by the embodiments of the application;

[0052] Figure 2 The structural schematic view of the spherical thrust bearing provided by the embodiments of the application;

[0053] Figure 3 The structural schematic view of the high-precision detection platform provided by the embodiments of the application;

[0054] Figure 4 The Figure 3 The top view after removing the micrometer structure;

[0055] Figure 5 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application;

[0056] Figure 6 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application; Figure 5 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application;

[0057] Figure 7 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application; Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application;

[0058] Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application; Figure 8 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application; Figure 7 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application; Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application;

[0059] Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application; Figure 9 Flow chart of the high-precision adjustment method provided by the embodiment of the present application.

[0060] Wherein:

[0061] 1-grinding and matching tool, 2-spherical support block, 3-thrust pad, 4-adjusting bolt, 5-fixing piece, 6-micrometer, 7-flat positioning plate, 8-assembling platform, 9-standard test block. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be apparently and completely described below with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person of ordinary skill in the art without creative labor belong to the protection scope of the present application.

[0063] In order for the person of ordinary skill in the art to better understand the present application, the present application will be further described in detail below with the drawings and specific embodiments.

[0064] Reference is made to the drawings attached in the specification Figure 1 -attached Figure 6 , Figure 1 Assembling view of the grinding and matching tool and the spherical support block provided by the embodiment of the present application, Figure 2 Structural schematic view of the spherical thrust bearing provided by the embodiment of the present application, Figure 3 Structural schematic view of the high-precision detection platform provided by the embodiment of the present application, Figure 4 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application, Figure 3 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application, Figure 5 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application, Figure 6 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application, Figure 5 Assembling view of the spherical thrust bearing and the high-precision detection platform provided by the embodiment of the present application,

[0065] The grinding and matching tool 1 and the high-precision detection platform; the spherical thrust bearing comprises: a detachable spherical supporting block 2 and a thrust pad 3; the grinding and matching tool 1 is used for eliminating the machining error caused by the workpiece deformation due to the magnetic force and the cutting force during grinding, and assisting the high-precision grinding operation of the spherical supporting block 2, comprising a matching groove provided on the top surface of the grinding and matching tool 1, the matching groove is used for installing the spherical supporting block 2 in an inverted manner, the top surface of the spherical supporting block 2 is arranged in a plane manner on the bottom surface of the matching groove, that is, a spherical mounting groove for placing the spherical surface at the top of the spherical supporting block 2 is provided in the center of the matching groove; the inner wall of the matching groove is circumferentially provided with adjusting bolts 4, the adjusting bolts 4 are equidistantly arranged, and the directions of the adjacent adjusting bolts 4 are perpendicular, so as to tightly clamp and limit the side wall of the spherical supporting block 4 and adjust the position of the spherical supporting block 2 in four mutually perpendicular directions in the horizontal plane; the inner wall of the matching groove is provided in a circular arc surface according to the diameter of the spherical supporting block 2, and after the adjustment is completed, the adjusting bolts 4 are tightened to limit the outer circle of the spherical supporting block.

[0066] During grinding, the bottom surface of the grinding and matching tool 1 is in contact with the high-precision platform of the grinding machine, the bottom end plane of the spherical supporting block 2 is ground with the bottom surface of the grinding and matching tool 1 as the machining reference, the adjustment and clamping times of each spherical thrust bearing are generally not more than 2 times, and the machining parameters such as the speed and direction of the main shaft of the grinding machine, the feed amount and direction, the magnetic disk suction force and the cooling liquid are completely the same during each grinding.

[0067] As shown in the accompanying drawings Figure 1 , the perpendicularity between the φA inner hole and the reference surface is ≤0.008mm, the parallelism between the lower end surface of the size B and the reference surface is ≤0.005mm, and the roughness is all above Ra0.8, the φA inner hole is matched with the outer circle of the spherical supporting block in a high-precision small gap, the purpose is to limit and disassemble the spherical supporting block 2 in the circumferential direction, the depth B is designed according to the principle that the machining amount of the spherical supporting block 2 is completely exposed, the size A is designed according to the principle that the middle position of the spherical supporting block is positioned, four adjusting bolts 4 are uniformly arranged in the circumferential direction, the purpose is to prevent the radial movement during grinding, the φB inner hole is used for installing the spherical part of the spherical supporting block 2, the design avoids the plane and the spherical surface connection place by 1-2mm, the depth D is greater than the spherical height of the spherical supporting block 2 by 2-3mm, the thickness E is more than twice of D, the purpose is to avoid the deformation of the spherical supporting block 2 caused by the magnetic force of the grinding machine platform, and to prevent the movement from affecting the high-precision grinding of the spherical supporting block 2 during the machining process. The top surface of the above-mentioned high-precision detection platform is used for placing the spherical thrust bearing and detecting the detection size data.

[0068] Further, the above-mentioned spherical supporting block 2 is connected to the grinding and matching tool 1 through a fixing piece 5, the surface of the spherical supporting block 2 is provided with a threaded hole corresponding to the fixing piece 5, the fixing piece 5 can be selected and is not limited to the screw structure, which is not limited in this paper.

[0069] Further, the high-precision detection platform comprises a micrometer fixed seat, a micrometer support, a micrometer 6, a plane positioning plate 7 and an assembly platform 8. The micrometer 6 is arranged on the top surface of the assembly platform 8, and the plane positioning plate 7 is horizontally placed on the top surface of the assembly platform 8.

[0070] The plane positioning plate 7 has a plane precision of ≤0.002 mm, and the top surface of the plane positioning plate 7 is used for placing the spherical thrust bearing and detecting the height dimension of the thrust bearing after each grinding and assembly, so as to determine the grinding amount of the support block.

[0071] Further, the high-precision detection platform further comprises a standard test block 9, which is used for being placed on the top surface of the plane positioning plate 7 to cooperate with the micrometer 6 to ensure the construction precision of the high-precision detection platform.

[0072] A high-precision adjustment method is applied to the high-precision adjustment device of the spherical thrust bearing, and the adjustment method comprises the following steps. Figure 9 , Figure 9 A high-precision adjustment method flow chart is provided in the embodiments of the present application. The adjustment method comprises the following steps.

[0073] S1: When the spherical thrust bearing is placed on the surface of the high-precision detection platform, the positioning marks of the spherical support block 2 and the thrust pad 3 and the positioning marks of the thrust pad 3 and the plane positioning plate 7 are determined.

[0074] S2: The grinding amount of the spherical support block 2 is obtained.

[0075] S3: When the grinding and assembling tool 1 is assembled with the spherical support block 2, the positioning marks of the grinding and assembling tool 1 and the spherical support block 2 and the positioning marks of the grinding and assembling tool 1 and the grinding platform are determined.

[0076] S4: The spherical support block 2 is ground according to the grinding amount.

[0077] S5: When the spherical support block is ground, the spherical thrust bearing is assembled, and the spherical thrust bearing is placed on the surface of the high-precision detection platform according to the positioning marks.

[0078] S6: The height dimension of the ground spherical thrust bearing is determined by the high-precision detection platform.

[0079] S7: If the height dimension of the ground spherical thrust bearing is qualified, the height adjustment of the spherical thrust bearing is qualified.

[0080] The application changes the traditional measurement method from indirect measurement to direct measurement of grinding amount, avoiding the influence of traditional calculation error and measurement error. First, according to the nominal size of the assembly size of the combined spherical thrust bearing as the reference, a high-precision detection platform is built, then the highest point of the combined spherical thrust bearing is found, and two mutually perpendicular moving routes are specified, finally the height size of the combined spherical thrust bearing and the grinding amount of the spherical support block are flexibly judged according to the reading of the micrometer, which has the advantages of high measurement accuracy, strong repeatability and convenience and speed.

[0081] Further, when the spherical thrust bearing is placed on the surface of the high-precision detection platform, the positioning marks of the spherical support block 2 and the thrust pad 3 and the positioning marks of the thrust pad 3 and the plane positioning plate 7 are determined, including:

[0082] Assembling the spherical thrust bearing, the above steps can be specifically implemented as follows: cleaning all the finished surfaces of the thrust pad 3 and the spherical support block 2 to ensure that there is no obvious impurity on each processing surface;

[0083] Checking whether the fitting size of the thrust pad 3 and the spherical support block 2 meets the design requirements of the drawing, whether there is interference between the inner hole of the thrust pad 3 and the transition fillet of the lower end surface and the spherical support block 2;

[0084] Checking the parallelism of the upper and lower planes of the spherical support block 2 and the parallelism of the inner hole end surface of the thrust pad 3 and the brass alloy surface, which are all ≤0.01mm, and unqualified for repair;

[0085] Putting the spherical support block 2 into the inner hole of the thrust pad 3, so that the adjusting end surface of the spherical support block 2 is completely in contact with the inner hole end surface of the thrust pad 3 and is in a gapless state;

[0086] According to the high-precision requirement, a high-precision detection platform is built, and two mutually perpendicular straight lines are identified based on the center of the outer circle of the bottom surface of the spherical thrust bearing. The above steps can be specifically implemented as follows: first, the planar positioning plate 7 is placed on the special assembly platform 8, and the gap below the planar positioning plate 7 should not exceed 0.02 mm, otherwise it must be padded with copper and iron; then the micrometer fixed seat, micrometer support and micrometer 6 are fixed on the special assembly platform 8, and the micrometer fixed seat and micrometer support should not shake, and the position of the spherical thrust bearing on the high-precision planar positioning plate 7 is determined (the spherical thrust bearing is placed on the planar positioning plate 7, and the micrometer 6 pointer is perpendicular to the highest point of the spherical surface), and the projection point of the micrometer 6 pointer center position on the planar positioning plate 7 coincides with the center point of the spherical thrust bearing, the bottom surface of the spherical thrust bearing abuts against the planar positioning plate 7, and a circle (i.e. a ring-shaped positioning line) is drawn along the outer circle of the thrust pad 3, and based on the center of the circle, two mutually perpendicular straight lines are identified (i.e. A-C-A and B-D-B), and the distance beyond the outer circle is determined, and finally the standard test block 9 is placed at the center position of the thrust bearing to adjust the height dimension F of the standard test block 9 (the height dimension F of the high-precision standard test block is equal to the nominal height dimension G of the spherical thrust bearing), and when adjusting, the micrometer 6 pointer is perpendicular to the plane of the standard test block 9, and the upward movement of the pointer is twice the absolute value of the maximum deviation M of the height dimension of the spherical thrust bearing (when the positive deviation, M = upper deviation ES, and when the negative deviation, M = lower deviation EI), the dial is rotated, the reading of the micrometer is adjusted to "0", and after the high-precision standard test block is removed, the reading of the micrometer is "-2|M|", and at the same time, the high-precision standard test block 9 is moved along the A-C-A and B-D-B lines to check the variation of the micrometer 6, and if the reading error of the micrometer 6 is less than or equal to 0.002 mm, it is considered that the high-precision detection platform is built qualified.

[0087] After the qualification, the height of the spherical thrust bearing cannot be changed during the entire adjustment process, and the height dimension adjustment of the combined spherical thrust bearing must be qualified. If there is any change, the high-precision detection platform must be rebuilt.

[0088] The spherical thrust bearing is placed on the high-precision planar positioning plate 7 according to the position determined by the above method, and when placing, the connecting line (the threaded hole provided by the assembly adjusting bolt 4) of the two threaded holes of the spherical support block 2 coincides with the AC or BD direction in the standard test block 9, and the position of the thrust pad 3 and the high-precision planar positioning plate 7 is determined based on the AC and BD directions, and the position of the spherical support block 2 and the thrust pad 3 is determined, and the assembly and placement position identification is completed, which is specifically as follows: Figure 7As shown: the AC, BD lines of the standard test block 9 are respectively extended, and A1, B1, C1, D1 position marks are respectively made on the high-precision plane positioning plate 7 and the outer circle of the thrust pad 3 (combined with the plane positioning plate 7), A, B, C, D position marks are respectively made on the spherical support block 2 and the thrust pad 3 (the inner hole is matched with the riding seam position), and the corresponding annular positioning lines are made.

[0089] Further, the grinding amount of the spherical support block 2 is obtained, including:

[0090] When the spherical thrust bearing is arranged on the surface of the plane positioning plate 7, ensure that the positioning marks of the thrust pad 3 and the top surface of the plane positioning plate 7 are aligned;

[0091] The dial of the dial gauge 6 is arranged towards the top end of the spherical support block 2, the spherical thrust bearing is pushed along two straight lines respectively, and the two maximum readings of the dial gauge 6 during the movement along the two straight lines are recorded;

[0092] The maximum readings of the dial gauge 6 and the up-down deviation value of the spherical thrust bearing are directly used to read the grinding amount, and the above steps can be specifically implemented as follows: the spherical thrust bearing is placed on the surface of the high-precision detection platform, and it is ensured that the A1, B1, C1, D1 position marks on the lower end surface of the thrust pad 3 are aligned with the position marks on the plane positioning plate 7;

[0093] Taking the dial of the dial gauge 6 on the high-precision detection platform as the center, the spherical thrust bearing is slowly translated along the A1-C1-A1 and B1-D1-B1 directions respectively multiple times in the state of ensuring that there is no gap in the thrust bearing, and the readings of the dial gauge 6 are observed, the highest points of the spherical support block 2 in the two directions are found, and when the difference between the maximum readings obtained by multiple movements in each direction and the difference between the maximum readings in the two directions are within 0.002 mm, it is judged that the detection reading is qualified, and the maximum readings of the dial gauge 6 on the two routes are recorded, and the average value of the two maximum readings is taken;

[0094] The grinding amount of the spherical support block 2 is determined according to the average value of the two maximum readings of the dial gauge 6 and the up deviation value ES and the down deviation value EI of the height size of the spherical thrust bearing on the same dial gauge 6. The grinding amount is determined by directly reading the value of the dial gauge 6, without the need for manual calculation, so as to avoid calculation errors. Generally, the height of the spherical thrust bearing is taken as the middle-up difference value for grinding.

[0095] Further, when the grinding and matching tool 1 is assembled with the spherical support block 2, the positioning marks of the grinding and matching tool 1 and the spherical support block 2 and the positioning marks of the grinding and matching tool 1 and the grinding platform are determined, including:

[0096] The grinding and matching tool 1 is assembled with the spherical support block 2 with high precision;

[0097] The annular positioning line and the position mark are arranged on the outer surface of the grinding and matching tool 1 and the surface of the grinding platform correspondingly;

[0098] The assembled grinding and matching tool 1 is installed with the grinding platform.

[0099] The above steps can be specifically implemented as follows: the spherical support block 2 is disassembled from the thrust pad 3 by using the threaded hole on the spherical support block 2, and the spherical support block 2 is assembled into the inner hole of the grinding and matching tool 1, and the specific assembly adjustment method is as follows:

[0100] The grinding and matching tool 1 and the spherical support block 2 are cleaned to ensure that there is no obvious impurity on each processing surface;

[0101] It is checked whether the matching size of the grinding and matching tool 1 and the spherical support block 2 meets the design requirements of the drawing, and whether there is interference between the inner hole of the grinding and matching tool 1 and the transition fillet of the lower end surface E and the spherical support block 2;

[0102] After the threaded hole of the spherical support block 2 is aligned with the bolt hole of the grinding and matching tool 1, the spherical support block 2 is assembled into the inner hole of the grinding and matching tool 1 by using the copper rod knocking method, and is fixed on the grinding and matching tool by using the fixing part 5 (optionally, a clamping screw), and the tightening torque value specified by the clamping screw is used when tightening, so that the end surface of the spherical support block 2 is completely in contact with the end surface of the inner hole of the grinding and matching tool 1 after assembly, and is in a gapless state.

[0103] The adjusting bolt 4 is tightened to limit the spherical support block 2 in the radial direction in four mutually perpendicular directions in the horizontal plane to prevent the movement in the radial direction during grinding.

[0104] The position marks of the grinding and matching tool 1, the spherical support block 2 and the grinding platform are determined, which can be specifically implemented as follows: firstly, the annular positioning line and the A, B, C and D position marks on the end surface of the grinding and matching tool 1 are made according to the annular positioning line and the A, B, C and D marks on the spherical support block 2 (the position marks are all at the center positions of the four radial threaded holes of the grinding and matching tool 1), then the grinding and matching tool 1 is placed on the grinding platform processing position of the high-precision surface grinder (the bottom end platform of the spherical support block 2 faces upward), and the annular positioning line and the A2, B2, C2 and D2 position marks are made on the end surface of the grinding platform according to the extension of the marks on the upper end surface of the grinding and matching tool 1.

[0105] The process parameters and the cooling liquid of the high-precision surface grinder are adjusted, and the upper end surface of the spherical support block 2 is ground according to the grinding amount determined by the above method, and the fine grinding is performed in 1-2 times to ensure that the roughness and the shape and position tolerances of the processed surface meet the design requirements.

[0106] After the grinding is completed, the flatness of the inner side and the outer side of the spherical support block 2 in the circumferential direction is checked, and the flatness ≤0.005mm is considered as qualified.

[0107] The grinding and matching tool 1 has the functions of adjustment, limiting and deformation prevention. That is, by increasing the distance between the spherical surface supporting block 2 and the grinding machine platform, the matching precision and the shape and position precision of the grinding and matching tool 1 and the spherical surface supporting block 1 in the radial and end face directions, and by uniformly distributing four direction adjustment screw arcs (cooperating with the spherical surface supporting block) on the circumference, the problem of affecting the machining precision caused by the movement in the grinding process and the deformation of the spherical surface supporting block 2 caused by the magnetic force of the suction cup is solved, and a strong guarantee for high-precision grinding is provided.

[0108] Further, if the height dimension of the spherical surface thrust bearing is unqualified, the method further comprises:

[0109] The spherical surface supporting block 2 is repeatedly adjusted. The above-mentioned grinding adjustment of the spherical surface supporting block 2 can be specifically implemented as follows: the above-mentioned grinding adjustment of the spherical surface supporting block 2 is repeatedly performed until it is detected that the height dimension of the spherical surface thrust bearing is qualified.

[0110] The adjustment screw bolt 4 and the fixing piece 5 are loosened, and the spherical surface supporting block 2 is removed;

[0111] The height dimension of the spherical surface thrust bearing is checked. First, the spherical surface supporting block 2 is assembled according to the above-mentioned requirements and the A, B, C and D position marks and the annular positioning line, and it is ensured that the position marks of the spherical surface supporting block 2 and the thrust pad 3 are aligned. Then, the spherical surface thrust bearing is placed on the standard detection platform according to the above-mentioned requirements to detect the height dimension of the spherical surface thrust bearing.

[0112] The height dimension of the spherical surface thrust bearing is judged. If the reading of the micrometer 6 on the high-precision standard detection platform is within the design requirement upper and lower deviation range, the height adjustment is qualified. If the reading of the micrometer 6 is less than the design requirement lower deviation, the height adjustment is out of tolerance, and the adjustment cannot be continued.

[0113] If the reading of the micrometer 6 is greater than the design requirement upper deviation, the grinding amount of the spherical surface supporting block 2 is determined again according to the above-mentioned requirements.

[0114] The related requirements in the above-mentioned method are repeatedly performed until the height adjustment of the spherical surface thrust bearing is qualified. In the assembly, it must be ensured that the A, B, C and D position marks and the annular positioning line of the thrust pad 3, the grinding and matching tool 1 and the spherical surface supporting block 2 are aligned. In the detection, it must be ensured that the A1, B1, C1 and D1 position marks and the annular positioning line of the thrust pad 3 and the plane positioning plate 7 are aligned. In the grinding and matching, it must be ensured that the A2, B2, C2 and D2 position marks and the annular positioning line of the grinding and matching tool 1 and the grinding platform are aligned, and the grinding process parameters are the same each time.

[0115] Further, if the height dimension of the spherical surface thrust bearing after grinding is qualified, after the height adjustment of the spherical surface thrust bearing is qualified, the method further comprises: four point position impact prevention loosening is performed at the positions equidistantly distributed along the circumferential direction at the positioning mark positions of the thrust pad 3 and the spherical surface supporting block 2.

[0116] The assembly size of the spherical thrust bearing is firstly defined in the adjustment process, which includes the position of the high-precision detection platform and the combined spherical thrust bearing, the assembly position of the spherical support block 2 and the grinding tool 1, the relative position of the spherical support block 2 and the grinding machine platform, the moving route of the spherical thrust bearing, and the adjustment method of the assembly size of the combined spherical thrust bearing. In the three links of the measurement link, the processing link and the assembly link, the same position, the same measurement method, the same processing and assembly method are used to effectively reduce the influence of the cumulative errors such as measurement error, assembly error and processing error on the high-precision assembly size.

[0117] It should be noted that the relational terms herein such as first and second, and the like, are used solely to distinguish one from another entity without necessarily requiring or implying any actual relationship or order between such entities.

[0118] The spherical thrust bearing high-precision adjustment device and the use method thereof provided by the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A high-precision adjustment method, characterized in that: Applied to high-precision adjustment devices for spherical thrust bearings, including: Grinding and fitting tooling (1) and a high-precision detection platform; the spherical thrust bearing comprises: a spherical support block (2) and a thrust washer (3) that can be detachably assembled; The top surface of the grinding and fitting tool (1) is provided with an assembly groove for the inverted installation of the spherical support block (2), and the top plane of the spherical support block (2) is arranged to fit the bottom surface of the assembly groove; a spherical installation groove for placing the top sphere of the spherical support block (2) is provided at the center of the assembly groove; adjusting bolts (4) are distributed along the circumference of the inner wall of the assembly groove, and the spacing between the adjusting bolts (4) is equal, and the directions of adjacent adjusting bolts (4) are perpendicular to each other, so as to tighten and limit the side wall of the spherical support block (2); the top surface of the high-precision detection platform is used to place the spherical thrust bearing and to detect the dimensional data of the spherical thrust bearing; The adjustment method includes: After the spherical thrust bearing is placed on the surface of the high-precision detection platform, the positioning marks between the spherical support block (2) and the thrust washer (3) and the positioning marks between the thrust washer (3) and the plane positioning plate (7) are determined; Obtaining the grinding amount of the spherical support block (2); After the grinding fixture (1) and the spherical support block (2) are assembled, the positioning marks of the grinding fixture (1) and the spherical support block (2) and the positioning marks of the grinding fixture (1) and the grinding platform are determined; Grinding the spherical support block (2) according to the grinding amount; When the spherical support block (2) is ground, the spherical thrust bearing is assembled, and the ground spherical thrust bearing is placed on the surface of the high-precision detection platform according to the positioning mark; Determining whether the height dimension of the ground spherical thrust bearing is qualified by the high-precision detection platform; If the height dimension of the spherical thrust bearing after grinding is qualified, the height adjustment of the spherical thrust bearing is qualified.

2. The high-precision adjustment method according to claim 1, wherein the high-precision detection platform comprises a micrometer (6), a plane positioning plate (7) and an assembly platform (8); The micrometer (6) is arranged on the top surface of the assembly platform (8), and the plane positioning plate (7) is placed horizontally on the top surface of the assembly platform (8); The top surface of the plane positioning plate (7) is used to place the spherical thrust bearing and detect its dimensional data; The high-precision detection platform further comprises: a standard test block (9), the standard test block (9) being placed on the top surface of the plane positioning plate (7) and cooperating with the micrometer (6) to ensure the construction accuracy of the high-precision detection platform; It is characterized in that, after the spherical thrust bearing is placed on the surface of the high-precision detection platform, the positioning marks of the spherical support block (2) and the thrust washer (3) and the positioning marks of the thrust washer (3) and the plane positioning plate (7) are determined, including: Assembling the spherical thrust bearing; The high-precision detection platform is constructed with high precision, and two mutually perpendicular straight line marks are confirmed with the outer circle center of the bottom surface of the spherical thrust bearing as a reference.

3. The high-precision adjustment method according to claim 2, characterized in that: The obtaining of the grinding amount of the spherical support block (2) comprises: When the spherical thrust bearing is arranged on the surface of the planar positioning plate (7), it is ensured that the thrust pad (3) is aligned with the positioning mark on the top surface of the planar positioning plate (7); The needle of the micrometer (6) is set toward the top of the spherical support block (2), and the spherical thrust bearing is pushed along two straight line marks respectively, and the two maximum readings of the micrometer (6) during the movement along the two straight line marks are recorded; The grinding amount is directly read using the maximum reading of the micrometer (6) and the upper and lower deviation values ​​of the spherical thrust bearing.

4. The high-precision adjustment method according to claim 3, wherein a fixing member (5) is provided through the bottom of the mounting groove in a vertical direction, and the fixing member (5) is used to install the spherical support block (2) in the assembly groove, characterized in that: After the grinding tool (1) and the spherical support block (2) are assembled, the positioning marks of the grinding tool (1) and the spherical support block (2) and the positioning marks of the grinding tool (1) and the grinding platform are determined, including: Assembling the grinding and fitting fixture (1) and the spherical support block (2) with high precision; Annular positioning lines and position marks are correspondingly provided on the outer cylindrical surface of the grinding tool (1) and the surface of the grinding platform; The assembled grinding fixture (1) is installed in conjunction with the grinding platform.

5. The high-precision adjustment method according to claim 3, characterized in that: If the height dimension of the spherical thrust bearing is unqualified, the method further includes: The spherical support block (2) is repeatedly adjusted.

6. The high-precision adjustment method according to claim 3, characterized in that: If the height dimension of the spherical thrust bearing after grinding is qualified, then after the height adjustment of the spherical thrust bearing is qualified, it also includes: punching and preventing loosening at four points equidistantly distributed along the circumferential direction at the positioning mark positions of the thrust pad (3) and the spherical support block (2).

7. The high-precision adjustment method according to claim 1, characterized in that: A fixing piece (5) is provided through the bottom of the installation groove in a vertical direction, and the fixing piece (5) is used to install the spherical support block (2) in the assembly groove.

8. The high-precision adjustment method according to claim 7, characterized in that: The high-precision detection platform includes a micrometer (6), a plane positioning plate (7) and an assembly platform (8); The micrometer (6) is arranged on the top surface of the assembly platform (8), and the plane positioning plate (7) is placed horizontally on the top surface of the assembly platform (8); The top surface of the planar positioning plate (7) is used to place the spherical thrust bearing and detect its dimensional data.

9. The high-precision adjustment method according to claim 8, characterized in that: The high-precision detection platform further comprises: a standard test block (9), which is used to be placed on the top surface of the plane positioning plate (7) and cooperate with the micrometer (6) to ensure the construction accuracy of the high-precision detection platform.

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