Splicing type water lubrication bearing plate strip outer circle processing method

Abstract

The present application relates to large ship propulsion system technical field, specifically relates to a kind of spliced water-lubricated bearing strip outer circle processing method.The present application is processed by the way of integral splicing to water-lubricated bearing strip outer circle, can effectively reduce the dimensional variability between strip, and provide the versatility of the same shape strip;The present application designs and makes guide plate tooling, and two end orifices are assembled into during assembly process, which is beneficial to facilitate the completion of strip assembly and adjustment, and also conducive to guarantee the centering of water tank after processing completion;The present application is configured with the center plug with taper at front end and outer circle locking ring strip tooling according to the size of strip inner hole after assembly during strip assembly process, which guarantees the stability of overall structure during bearing shell outer circle processing after assembly;The cylindrical degree and precision of water-lubricated bearing strip outer circle after processing of the present application are high, which is conducive to improve the fit of strip and bearing copper bush assembly, and can effectively reduce stress concentration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large ship propulsion systems, and particularly relates to a spliced water-lubricated bearing strip outer circle machining method. BACKGROUND

[0002] The water-lubricated bearing strip for large ships is usually installed in an integral splicing manner. In order to prevent the bearing strip from loosening after integral splicing, the assembly between the outer circle surface of the bearing strip and the inner circle surface of the copper bush is installed in an interference fit manner. In order to guarantee the fit of the two cylindrical surfaces after installation and reduce the stress concentration of the spliced strip, the machining precision of the outer circle surface of the strip needs to be fully guaranteed.

[0003] The outer circle machining of the water-lubricated bearing strip in the prior art cannot guarantee the fit between strips of different specifications, and the machining stress is high, and the machining efficiency and precision are difficult to guarantee. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a spliced water-lubricated bearing strip outer circle machining method, which can effectively improve the machining precision of the outer circle surface of the integral splicing type water-lubricated bearing strip material and improve the machining efficiency.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is:

[0006] The present application provides a spliced water-lubricated bearing strip outer circle machining method, mainly comprising the following steps:

[0007] S1, strip splicing: splicing a plurality of to-be-machined strips 1 along the outer circle of the guide plate tooling 2 in the circumferential direction, and inserting a process steel strip 5 between the plurality of to-be-machined strips 1 to jointly form a cylindrical strip combination structure;

[0008] S2, strip outer circle middle clamping: sleeving a strip outer circle middle clamping tooling 3 in the middle part of the outer circle of the cylindrical strip combination structure, clamping the plurality of to-be-machined strips 1 on the corresponding guide plate tooling 2 groove by means of the jacking bolt 4, and pressing the plurality of to-be-machined strips 1 by the process steel strip locking bolt 6;

[0009] S3, strip end reference surface machining: machining a strip end outer circle reference surface 8 and a strip end inner hole reference surface 9 on the outer wall and the inner wall of the two ends of the cylindrical strip combination structure, respectively;

[0010] S4, center plug installation: inserting two center plugs 10 into the inner holes of the two ends of the cylindrical strip combination structure, respectively, and fixedly connecting the two center plugs 10 through a double-headed stud, and then installing a wedge 13 between the process steel strip 5 and the center plug 10;

[0011] S5, clamping the outer circle of the strip at both ends: two outer circle end clamping fixtures 12 are respectively clamped on the outer circle reference surface 8 of the strip end of the cylindrical strip assembly structure at both ends, and the outer circle middle clamping fixture 3 is disassembled;

[0012] S6, turning processing of the outer circle of the strip.

[0013] Preferably, in step S1, a plurality of slots compatible with the size of the to-be-processed strip 1 are formed on the outer circle of the guide plate fixture 2, and a plurality of to-be-processed strips 1 are spliced into a cylindrical structure with gaps along the outer circle of the guide plate fixture 2, and the process steel strip 5 is inserted at the gap of the cylindrical structure.

[0014] Preferably, in step S2, the outer circle middle clamping fixture 3 is composed of an upper half locking ring and a lower half locking ring, and the upper half locking ring and the lower half locking ring are clamped and fixed on the outer circle middle part of the cylindrical strip assembly structure by the middle fixture locking bolt 7.

[0015] Preferably, in step S2, a plurality of jacking bolt holes are formed on the outer circle middle clamping fixture 3 in the circumferential direction, and the positions of the jacking bolt holes correspond to the slots on the guide plate fixture 2.

[0016] Preferably, in step S3, the processing size of the outer circle reference surface 8 of the strip end is the same as the preset processing finished product size of the outer circle of the strip.

[0017] Preferably, in step S4, the center plug 10 and the inner hole of the cylindrical strip assembly structure are in interference fit, and the interference amount is 0.02-0.05.

[0018] Preferably, a guide cone surface 11 is arranged on the inner side of the center plug 10, and the outer diameter of the guide cone surface 11 is smaller than the inner diameter of the inner hole of the cylindrical strip assembly structure.

[0019] Preferably, a plug stud hole 15 compatible with the stud bolt is formed on the end face of the center plug 10, and the two ends of the stud bolt respectively extend out of the corresponding plug stud hole 15 of the two center plugs 10 and are locked by the nut to realize the fixed connection of the two center plugs 10.

[0020] A plurality of plug calibration holes 16 are uniformly formed on the end face of the center plug 10 in the circumferential direction, which are used for circumferential degree calibration in the outer circle processing.

[0021] Preferably, in step S5, the width of the outer circle end clamping fixture 12 of the strip is smaller than the width of the outer circle middle clamping fixture 3 of the strip, and the inner diameter of the outer circle end clamping fixture 12 of the strip is compatible with the outer diameter of the outer circle reference surface 8 of the strip end.

[0022] Preferably, the outer circular end clamping tool 12 of the strip is composed of the upper half locking ring two and the lower half locking ring two, and the upper half locking ring two and the lower half locking ring two are clamped and fixed to the outer circular end of the cylindrical strip assembly structure by the end tool locking bolt 14.

[0023] Compared with the prior art, the present application has the following main advantages:

[0024] 1. The present application adopts the whole splicing method to process the outer circle of the water-lubricated bearing strip, which can effectively reduce the size difference between the strips and provide the universality of the same shape strip.

[0025] 2. The present application designs and manufactures a guide plate tool, which is assembled into the two end orifices in the assembly process, which is beneficial to facilitate the assembly and adjustment of the strip, and is also beneficial to ensure the centering of the water tank after processing.

[0026] 3. In the strip assembly process, according to the size of the inner hole of the assembled strip, the present application configures a front end tapered center plug and an outer circular locking ring strip tool, which ensures the stability of the whole structure during the processing of the outer circle of the assembled bearing bush.

[0027] 4. The water-lubricated bearing strip outer circle processed by the present application has high cylindricality and precision, which is beneficial to improve the fit of the strip and the bearing copper bush after assembly, and can effectively reduce stress concentration. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The flow chart of the splicing type water-lubricated bearing strip outer circle processing method in the embodiment of the present application;

[0029] Figure 2 The installation schematic diagram of the guide plate tool in the embodiment of the present application;

[0030] Figure 3 The cross-sectional size schematic diagram of the guide plate tool in the embodiment of the present application;

[0031] Figure 4 The installation schematic diagram of the outer circular middle clamping tool of the strip in the embodiment of the present application;

[0032] Figure 5 The installation schematic diagram of the center plug in the embodiment of the present application;

[0033] Figure 6 The installation schematic diagram of the outer circular end clamping tool of the strip in the embodiment of the present application.

[0034] In the figure: 1, the plate to be processed; 2, the guide plate tool; 3, the plate outer circle middle clamping tool; 4, the jacking bolt; 5, the process steel strip; 6, the process steel strip locking bolt; 7, the middle tool locking bolt; 8, the plate end outer circle reference surface; 9, the plate end inner hole reference surface; 10, the center plug; 11, the guide conical surface; 12, the plate outer circle end clamping tool; 13, the wedge; 14, the end tool locking bolt; 15, the plug stud hole; 16, the plug calibration hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0036] It should be pointed out that according to the needs of implementation, each step / component described in the present application can be split into more steps / components, or two or more steps / components or part of the operation of the steps / components can be combined into a new step / component to achieve the purpose of the present application.

[0037] Example one, the present embodiment provides a splicing type water lubrication bearing plate outer circle processing method, which is suitable for processing the outer circle surface of the water lubrication bearing integral splicing type plate material of the large ship propulsion shaft system.

[0038] As shown in Figure 1 , the method mainly comprises the following steps:

[0039] S1, plate assembly: a plurality of plate to be processed 1 are spliced along the outer circle of the guide plate tool 2, and a process steel strip 5 is inserted between the plurality of plate to be processed 1 to form a cylindrical plate combination structure;

[0040] S2, plate outer circle middle clamping: plate outer circle middle clamping tool 3 is sleeved on the outer circle middle part of the cylindrical plate combination structure, a plurality of plate to be processed 1 are jacked on the corresponding guide plate tool 2 groove by jacking bolt 4, and process steel strip locking bolt 6 drives process steel strip 5 to press the plurality of plate to be processed 1;

[0041] S3, plate end reference surface processing: plate end outer circle reference surface 8 and plate end inner hole reference surface 9 are respectively processed on the outer wall and inner wall of the both ends of the cylindrical plate combination structure;

[0042] S4, installation of center plugs: insert two center plugs 10 into the inner holes at both ends of the cylindrical strip assembly structure, and fix the two center plugs 10 together with double-ended studs. Then, install wedges 13 between the process steel strip 5 and the center plugs 10.

[0043] S5, clamping the two ends of the outer circle of the slat: respectively, the two clamping fixtures 12 are fitted and clamped on the reference surface 8 of the outer circle of the slat ends at both ends of the cylindrical slat assembly structure, and the clamping fixture 3 in the middle of the outer circle of the slat is removed.

[0044] S6, turning of the outer diameter of a slab.

[0045] like Figures 2-3 As shown, in step S1, the outer ring of the guide plate fixture 2 has multiple slots that are adapted to the size of the strip 1 to be processed along the circumferential direction. The multiple strips 1 to be processed are spliced ​​together along the outer ring of the guide plate fixture 2 to form a cylindrical structure with gaps. The process steel strips 5 are inserted into the gaps of the cylindrical structure.

[0046] like Figure 4 As shown, in step S2, the clamping fixture 3 at the middle of the outer circle of the strip consists of an upper half locking ring and a lower half locking ring. The upper half locking ring and the lower half locking ring are clamped and fixed to the middle of the outer circle of the cylindrical strip assembly structure by the middle fixture locking bolt 7.

[0047] Furthermore, in step S2, the clamping fixture 3 at the center of the outer circle of the strip has a plurality of tightening bolt holes along the circumference, and the position of the tightening bolt holes corresponds to the groove on the guide plate fixture 2.

[0048] Furthermore, in step S3, the machining dimensions of the outer circle reference surface 8 at the end of the strip are the same as the preset finished dimensions of the outer circle of the strip.

[0049] like Figures 5-6 As shown, in step S4, the central plug 10 and the inner hole of the cylindrical strip assembly structure are interference-fitted, and the interference amount is 0.02 to 0.05.

[0050] Furthermore, a guide cone surface 11 is provided on the inner circumference of the central plug 10, and the outer diameter of the guide cone surface 11 is smaller than the inner diameter of the inner hole of the cylindrical strip assembly structure.

[0051] Furthermore, the end face of the center plug 10 is provided with a plug stud hole 15 that is adapted to the double-ended stud. The two ends of the double-ended stud extend from the corresponding plug stud holes 15 on the two center plugs 10 respectively and are locked by nuts to realize the fixed connection of the two center plugs 10.

[0052] The end face of the central plug 10 is provided with a plurality of plug calibration holes 16 evenly distributed along the circumference for circumference calibration during the outer circle machining process.

[0053] Furthermore, in step S5, the width of the clamping fixture 12 at the outer end of the slat is smaller than the width of the clamping fixture 3 at the middle of the outer slat, and the inner diameter of the clamping fixture 12 at the outer end of the slat is adapted to the outer diameter of the reference surface 8 at the end of the slat.

[0054] like Figure 6 As shown, the clamping fixture 12 at the outer end of the slat consists of an upper locking ring and a lower locking ring. The upper locking ring and the lower locking ring are clamped and fixed to the outer end of the cylindrical slat assembly structure by the end fixture locking bolt 14.

[0055] Example 2: The method for machining the outer diameter of spliced ​​water-lubricated bearing strips provided in this example also includes the following features:

[0056] (1) Slat assembly

[0057] First, the guide plates and clamping fixtures are used to assemble the strips, and then the process steel strips are tightened using bolts and nuts. The strips are assembled by tightening the bolts; at this point, the center plugs at both ends are not engaged. The fixture consists of two locking ring halves for easy assembly and disassembly.

[0058] The total length of the strip is adjusted according to the process specifications. Using the lengths at both ends, a 30mm outer diameter and an inner hole reference are machined. A CNC floor-mounted boring machine is used with a rotary table to mill the 30mm outer diameter at both ends. Then, locking rings are used to secure the milled ends, and the inner hole is initially bored to a circle.

[0059] Based on actual measurements, the inner bore is fitted with a center plug with an interference fit of 0.02 to 0.05 mm. The front end uses a tapered surface guide with a taper of approximately 1:200. The center plugs at both ends are tightened using double-ended studs and nuts. This ensures both the stability of the overall bearing structure and a certain interference fit for the center plugs.

[0060] After the slats are assembled using process steel strips, center plugs are installed at both ends, and wedges are used to tighten the process steel strips so that all the wedge surfaces of the slats fit together tightly.

[0061] (2) Machining of the outer diameter of the slats

[0062] First, the outer diameter reference at both ends is tightened by using narrow locking rings at both ends. Then, the middle wide locking ring is removed. Next, the clamping operation is carried out, and the outer diameter is machined on a lathe. During the machining process, the circumference is corrected by using the calibration hole of the center plug.

[0063] First, the outer diameter reference of the two locking ring positions (outer diameter allowance) is machined, and the locking ring is used to tighten it; then the outer diameter is precision machined to turn the irregular shape into a circle.

[0064] Further, the parts not described in detail in the present application are the same as the prior art or are implemented using the prior art.

[0065] In summary:

[0066] 1、The water-lubricated bearing strip outer circle of the present application is processed by the whole splicing mode, which can effectively reduce the size difference between the strips and provide the universality of the same shape strip.

[0067] 2、The guide plate tool is designed and made, and the two end orifices are assembled into during the assembly process, which is beneficial to conveniently and quickly complete the strip assembly and adjustment, and is also beneficial to ensure the centering of the water tank after processing.

[0068] 3、During the strip assembly process, the front end center plug with a taper and the outer circle locking ring strip tool are configured according to the size of the inner hole of the assembled strip, which ensures the stability of the whole structure during the processing of the outer circle of the assembled bearing bush.

[0069] 4、The water-lubricated bearing strip outer circle processed by the present application has high cylindricity and precision, which is beneficial to improve the fit of the strip and the bearing copper bush after assembly, and can effectively reduce stress concentration.

[0070] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of machining the outer diameter of a pieced water-lubricated bearing strip, characterized in that, It comprises the following steps: S1, board assembly: along the guide plate tooling (2) outer circle circumferential splice multiple to be processed board (1), and in multiple to be processed board (1) between the process steel bar (5) is inserted, together constitute the cylindrical board combination structure; S2, board outer circle middle clamping: in the cylindrical board combination structure outer circle middle part sets up board outer circle middle clamping tooling (3), through the top bolt (4) tight multiple to be processed board (1) tight in corresponding guide plate tooling (2) groove position, and through the process steel bar locking bolt (6) drive process steel bar (5) tight multiple to be processed board (1); S3, board end reference surface processing: in the cylindrical board combination structure both ends of the outer wall and the inner wall respectively processes board end outer circle reference surface (8) and board end hole reference surface (9); S4, center plug installation: two center plugs (10) are inserted into the cylindrical board combination structure both ends of the hole, and the two center plugs (10) are fixedly connected by stud between the process steel bar (5) and the center plug (10), and then the wedge (13) is installed between the process steel bar (5) and the center plug (10); S5, board outer circle both ends clamping: two board outer circle end clamping tooling (12) are respectively set in the cylindrical board combination structure both ends of the board end outer circle reference surface (8), and the board outer circle middle clamping tooling (3) is removed; S6, board outer circle turning processing.

2. The method of claim 1, wherein In step S1, the guide plate tooling (2) outer circle is provided with a plurality of groove positions along the circumference, which are matched with the size of the to-be-processed board (1). Multiple to-be-processed boards (1) are spliced into a cylindrical structure with gaps along the guide plate tooling (2) outer circle. The process steel bar (5) is inserted into the gap of the cylindrical structure.

3. The method of claim 1, wherein In step S2, the board outer circle middle clamping tooling (3) is composed of an upper half locking ring and a lower half locking ring. The upper half locking ring and the lower half locking ring are clamped and fixed to the outer circle middle part of the cylindrical board combination structure by a middle tool locking bolt (7).

4. The method of claim 2, wherein In step S2, the board outer circle middle clamping tooling (3) is provided with a plurality of top bolt holes along the circumference, and the positions of the top bolt holes correspond to the groove positions on the guide plate tooling (2).

5. The method of claim 1, wherein In step S3, the processing size of the board end outer circle reference surface (8) is the same as the preset board outer circle finished product size.

6. The method of claim 1, wherein In step S4, the center plug (10) and the inner hole of the cylindrical board combination structure adopt interference fit, and the interference amount is 0.02-0.

05.

7. A method of machining the outside diameter of a splice-type water-lubricated bearing strip according to claim 6, characterized in that, The inner side of the center plug (10) is provided with a guide cone surface (11), and the outer diameter of the guide cone surface (11) is smaller than the inner diameter of the inner hole of the cylindrical board combination structure.

8. The method of claim 6, wherein the method further comprises: The end face of the center plug (10) is provided with a plug stud hole (15) matched with the stud. The two ends of the stud are respectively extended out of the corresponding plug stud hole (15) of the two center plugs (10), and then locked by a nut, realizing the fixed connection of the two center plugs (10). The center plug (10) end face is uniformly provided with a plurality of plug calibration holes (16) along the circumference, which are used for circumference calibration in the outer circle machining process.

9. The method of claim 3, wherein the method further comprises the step of: 9-1) machining the outer circle of the plate strip to a predetermined diameter. In step S5, the width of the batten outer circle end clamping tool (12) is smaller than the width of the batten outer circle middle clamping tool (3), and the inner diameter of the batten outer circle end clamping tool (12) is matched with the outer diameter of the batten end outer circle reference surface (8). ​ 10. The method of claim 9, wherein the method further comprises: The batten outer circle end clamping tool (12) is composed of an upper half locking ring two and a lower half locking ring two, and the upper half locking ring two and the lower half locking ring two are clamped and fixed to the outer circle end of the cylindrical batten assembly structure through the end tool locking bolt (14).

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