CN106334905A - Machining method for tilting-pad bearing body - Google Patents
Machining method for tilting-pad bearing body Download PDFInfo
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- CN106334905A CN106334905A CN201610790250.9A CN201610790250A CN106334905A CN 106334905 A CN106334905 A CN 106334905A CN 201610790250 A CN201610790250 A CN 201610790250A CN 106334905 A CN106334905 A CN 106334905A
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- 238000003754 machining Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000007514 turning Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000003801 milling Methods 0.000 claims description 31
- 239000002826 coolant Substances 0.000 claims description 19
- 238000005553 drilling Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 24
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 16
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 238000010791 quenching Methods 0.000 description 9
- 230000000171 quenching effect Effects 0.000 description 9
- 238000005496 tempering Methods 0.000 description 9
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 description 8
- 239000005696 Diammonium phosphate Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 8
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 8
- 235000019838 diammonium phosphate Nutrition 0.000 description 8
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 description 8
- 235000010333 potassium nitrate Nutrition 0.000 description 8
- 239000004323 potassium nitrate Substances 0.000 description 8
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a machining method for a tilting-pad bearing body. The machining method for the tilting-pad bearing body includes the steps that by means of the procedures of lineation, saw cutting, middle-split face planing and rough turning, rough machining is performed on an upper bearing body and a lower bearing body; the upper bearing body and the lower bearing body subjected to rough machining are subjected to heat treatment; the middle-split face and the top small plane of the upper bearing body and the lower bearing body subjected to heat treatment are ground, and it is guaranteed that the upper bearing body and the lower bearing body are equal in height; finish machining is performed in a numerical control turning-milling center according to a machining program compiled in advance; holes of the middle-split face are treated by a bench worker; and the upper bearing body and the lower bearing body are connected together through hinged bolts to form the tilting-pad bearing body. By means of the machining method for the tilting-pad bearing body, the machined tilting-pad bearing body is high in quality, and the machining cost is low.
Description
Technical Field
The invention relates to the technical field of bearing processing, in particular to a processing method of a tilting pad bearing body.
Background
The tilting pad bearing has the characteristics of high rotation precision, good stability and the like, so that the tilting pad bearing is widely applied to a large turbine compressor, and the tilting pad bearing effectively ensures the operation of the large turbine compressor in the industries of petroleum, chemical engineering, metallurgy, power, air separation and the like. With the continuous development of the running direction of the turbo compressor under high rotating speed, large load and complex working conditions, the tilting pad bearing for the compressor has higher requirements, wherein a tilting pad bearing body is a part with higher difficulty in manufacturing the tilting pad bearing, and the quality of the tilting pad bearing body is directly related to whether the performance of the tilting pad bearing is excellent or not and whether the running of the turbo compressor is stable or not.
The traditional tilting pad bearing body has the defects of long production period, high technical difficulty, complex process, higher requirement on the quality of processing personnel and poorer economy, and has the quality problems that a workpiece is easy to deform, the form and position tolerance is difficult to ensure, and the like. Therefore, with the continuous development of the turbine compressor, the conventional tilting pad bearing body technical manufacturing scheme is more difficult to meet the requirement.
Disclosure of Invention
The invention aims to provide a method for processing a tilting pad bearing body, which has high product quality and low production cost.
In order to solve the technical problem, the invention provides a method for processing a tilting pad bearing body, which comprises the following steps:
roughly processing an upper bearing body and a lower bearing body through the procedures of scribing, sawing, planing and splitting and rough turning;
carrying out heat treatment on the upper bearing body and the lower bearing body after rough machining;
grinding a middle facet and a top facet of the upper bearing body and the lower bearing body after heat treatment to ensure that the heights of the upper bearing body and the lower bearing body are equal;
performing finish machining in a numerical control turning and milling machining center according to a pre-programmed machining program, wherein the finish machining comprises clamping and tool setting, setting machining parameters, finish turning a workpiece and milling and drilling the workpiece;
processing each hole of the middle section by a bench worker;
and the upper bearing body and the lower bearing body are connected together by a reamed hole bolt to form the tilting pad bearing body.
Further, the heat treatment is thermal refining treatment of heating, heat preservation and cooling by coolant in an electric heating furnace on the upper bearing body and the lower bearing body after rough machining, so that Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 250-300N/mm2。
Further, the setting of the processing parameters comprises setting of the spindle rotation speed, the feeding speed, the tool feeding amount, and selection of the type and the rotation speed of the tool.
Further, the finish turning of the workpiece comprises respectively processing the outer circle, the end face and the inner hole of the upper bearing body and the lower bearing body, and respectively finish turning the end faces of the upper bearing body and the lower bearing body after automatically adjusting the clamping direction; the milling and drilling process for the workpiece comprises the following steps: milling a pit at the joint of the upper bearing body and the lower bearing body, processing a connecting hole at the joint of the upper bearing body and the lower bearing body, finely reaming and tapping the connecting holes of the upper bearing body and the lower bearing body, milling and drilling anti-rotation pin holes, hoisting holes, oil inlet holes, tile positioning screw holes, vibration measuring probe mounting frame holes and tapping holes on the upper bearing body and the lower bearing body
Further, the step of processing the connecting hole of the upper bearing body is to mill and drill a smooth hole on the upper bearing body, and the step of processing the connecting hole of the lower bearing body is to mill and drill a bottom hole of a non-threaded part and a bottom hole of a threaded part on the lower bearing body.
Furthermore, the connecting holes of the upper bearing body are two pairs of unthreaded holes respectively arranged on two sides of the upper bearing body, and the unthreaded holes on the upper half part and the unthreaded holes on the lower half part of the unthreaded holes are formed; the connecting hole of the lower bearing body comprises an upper half part which is a bottom hole of a non-threaded part and a lower half part which is a bottom hole of a threaded part, and the inner diameter of a smooth hole of the lower half part of the upper bearing body is the same as the inner diameter of the bottom hole of the non-threaded part of the lower bearing body.
Further, the reamed hole bolt includes nut, first half section and second half section, first half section is the non-thread portion, second half section is the screw thread portion, the external diameter of nut with the internal diameter of the first half unthreaded hole of upper bearing body matches, the external diameter of the non-thread portion of reamed hole bolt with the second half unthreaded hole of upper bearing body reaches the internal diameter of the non-thread portion bottom outlet of lower bearing body matches.
Further, the non-threaded part of the reamed hole bolt is in clearance fit with the lower half unthreaded hole of the upper bearing body and the non-threaded part bottom hole of the lower bearing body, and the tolerance band of the clearance fit is H7/g6, wherein H is the basic deviation of the reference hole, 7 is the tolerance grade of the reference hole, g is the basic deviation of the shaft, and 6 is the tolerance grade of the shaft.
Further, the upper bearing body and the lower bearing body are connected together by a reamed hole bolt which is inserted into the unthreaded part bottom hole of the lower bearing body from the unthreaded hole of the upper bearing body and screwed with the threaded part of the reamed hole bolt into the threaded part bottom hole of the lower bearing body.
Furthermore, the numerical control turn-milling machining center is a turn-milling composite machining center with the model number of DMG CTX-GAMMA-2000 TC.
According to the machining method of the tilting pad bearing body, provided by the invention, the machining of the workpiece is controlled by the numerical control turning and milling machining center and the programmed machining control software, so that the machining precision, the surface roughness and the machining reliability of the workpiece are greatly improved, and the quality of the product is obviously improved; the numerical control turning and milling machining center can finish multiple machining procedures such as finish turning, milling, drilling, tapping and the like on a workpiece by one-time machining, so that the procedures are greatly compressed, the working hours are saved, the cost is reduced, and meanwhile, the problems of error accumulation, easy collision and damage to the surface of the workpiece and the like caused by multiple procedures and multiple clamping are avoided; the numerical control turn-milling machining center greatly improves the manufacturing capacity and the machining level, the machining precision of a workpiece reaches a very high level, connecting holes in an upper bearing body and a lower bearing body are machined in the numerical control turn-milling machining center, the precision is very high, the external diameter of a non-threaded part of a comparative hole bolt is basically the same as the internal diameter of a unthreaded hole in the lower half part of the upper bearing body and the internal diameter of a bottom hole in the non-threaded part of the lower bearing body, the numerical control turn-milling machining center is in very small clearance fit, the positioning effect can be achieved, the assembly precision of a product can be effectively improved, the installation error between the upper bearing body and the lower bearing body is eliminated, and the reliability of the product is greatly. And 4 reamed hole bolts connect the upper bearing body and the lower bearing body together, so that the connection pretightening force and the shearing resistance force can be provided, the stress points of each acting force are more, the distribution is more uniform and scientific, and the connection effect and the mid-split positioning effect of the upper bearing body and the lower bearing body are obviously improved. In addition, according to the method for machining the tilting pad bearing body, provided by the invention, the workpiece is firstly subjected to finish turning, and then the upper bearing body and the lower bearing body are connected together, so that the phenomena that the pin is deformed due to stress and form and position tolerances such as misalignment of the upper half and the lower half of the tilting pad bearing body cannot be guaranteed because the split surface of the workpiece is subjected to overlarge shearing force in the turning process are avoided.
Drawings
Fig. 1 is a flowchart of a method for processing a tilting pad bearing body according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a tilting pad bearing body according to an embodiment of the present invention;
fig. 3 is a schematic view of a reamed hole bolt structure of a tilting pad bearing body according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, a method for processing a tilting pad bearing body according to an embodiment of the present invention includes the following steps:
rough machining: and roughly processing the upper bearing body and the lower bearing body through the procedures of scribing, sawing, planing and splitting and rough turning.
And (3) heat treatment: and heating and insulating the roughly processed upper bearing body and lower bearing body in an electric heating furnace, and carrying out quenching and tempering by cooling with a coolant, so that the Brinell hardness HB of the upper bearing body and the lower bearing body reaches 250-300N/mm 2. Wherein,
as an embodiment, the coolant comprises 3-6% by mass of suberic acid, 2-3% by mass of diammonium phosphate, 0.2-0.4% by mass of C4-C6 unsaturated monovinyl monocarboxylic acid, 0.01-1.0% by mass of potassium nitrate, 0.05-1.0% by mass of tolyltriazole, and the balance of propylene glycol. Through quenching and tempering treatment by cooling agent, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 250-300N/mm 2, and the effect of excellent corrosion resistance is achieved.
In one embodiment, the coolant comprises, by mass, 4% suberic acid, 2% diammonium phosphate, 0.3% C4-C6 unsaturated monovinyl monocarboxylic acid, 0.04% potassium nitrate, 0.08% tolyltriazole, and the balance propylene glycol. Through quenching and tempering treatment by cooling agent, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 280N/mm2, and the corrosion resistance can reach 90%.
In another example, the coolant was 5% suberic acid, 2.5% diammonium phosphate, 0.25% C4-C6 unsaturated monovinyl monocarboxylic acid, 0.09% potassium nitrate, 0.3% tolyltriazole, and the balance propylene glycol by mass. Through quenching and tempering treatment by cooling of the coolant, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 300N/mm2, and the corrosion resistance can reach 93%.
In another example, the coolant was 6% suberic acid, 3% diammonium phosphate, 0.35% C4-C6 unsaturated monovinyl monocarboxylic acid, 0.06% potassium nitrate, 0.7% tolyltriazole, and the balance propylene glycol by mass. Through quenching and tempering treatment by cooling the coolant, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 290N/mm2, and the corrosion resistance can reach 96%.
As another embodiment, the coolant comprises 2-5% by mass of suberic acid, 1-3% by mass of diammonium phosphate, 0.3-0.5% by mass of C4-C6 unsaturated monovinyl monocarboxylic acid, 0.01-0.05% by mass of potassium nitrate, 0.05-0.1% by mass of tolyltriazole, 5-10% by mass of polyether, and the balance of propylene glycol. Through quenching and tempering treatment by cooling agent, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 250-300N/mm 2, and the effect of excellent corrosion resistance is achieved.
In one embodiment, the coolant is 2% suberic acid, 1% diammonium phosphate, 0.3% C4-C6 unsaturated monovinyl monocarboxylic acid, 0.01% potassium nitrate, 0.05% tolyltriazole, 6% polyether, and the balance propylene glycol, by mass. Through quenching and tempering treatment by cooling of the coolant, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 280N/mm2, and the corrosion resistance can reach 96%.
In another example, the coolant was 5% suberic acid, 3% diammonium phosphate, 0.4% C4-C6 unsaturated monovinyl monocarboxylic acid, 0.04% potassium nitrate, 0.3% tolyltriazole, 8% polyether, and the balance propylene glycol by mass. Through quenching and tempering treatment by cooling of the coolant, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 300N/mm2, and the corrosion resistance can reach 99%.
In another example, the coolant was 6% suberic acid, 3% diammonium phosphate, 0.45% C4-C6 unsaturated monovinyl monocarboxylic acid, 0.05% potassium nitrate, 0.7% tolyltriazole, 8% polyether, and the balance propylene glycol by mass. Through quenching and tempering treatment by cooling the coolant, the Brinell hardness value HB of the upper bearing body and the lower bearing body reaches 290N/mm2, and the corrosion resistance can reach 98%.
Planing: and respectively grinding the middle facet and the top facet of the upper bearing body and the lower bearing body after heat treatment to ensure that the heights of the upper bearing body and the lower bearing body are equal.
Finish machining: and (3) performing finish machining on the upper bearing body and the lower bearing body respectively in a numerical control turning and milling machining center, firstly clamping the upper bearing body and the lower bearing body, setting a tool, then setting the rotating speed of a main shaft, the feeding speed and the tool depth, and selecting the type and the rotating speed of the tool. And respectively carrying out finish turning on the upper bearing body and the lower bearing body according to parameters set by a program: the outer circle, the end face and the inner hole of the upper bearing body and the lower bearing body are respectively machined, then the clamping direction is automatically adjusted, and the end face is finely turned. And after finish turning, respectively milling and drilling the upper bearing body and the lower bearing body: milling a socket at the joint of the upper bearing body and the lower bearing body, and then machining a connecting hole at the joint of the upper bearing body and the lower bearing body, wherein the machining of the connecting hole of the upper bearing body is to drill a smooth hole on the upper bearing body, and the machining of the connecting hole of the lower bearing body is to drill a bottom hole of a threaded part and a bottom hole of a non-threaded part on the lower bearing body. And then, carrying out finish reaming on the unthreaded hole of the upper bearing body, carrying out finish reaming on the bottom hole of the non-threaded part of the lower bearing body, and tapping on the bottom hole of the threaded part of the lower bearing body. And finally, drilling holes such as a rotation-preventing pin hole, a hoisting hole, an oil inlet hole, a tile positioning screw hole, a vibration measuring probe mounting frame hole and the like on the end faces and the circumferences of the split surfaces of the upper bearing body and the lower bearing body respectively, and tapping each hole containing a threaded part.
B, bench work treatment: the smooth hole on the middle parting surface of the upper bearing body, the bottom hole of the non-threaded part and the bottom hole of the threaded part on the middle parting surface of the lower bearing body, and the rotation-preventing pin holes on the middle parting surfaces of the upper bearing body and the lower bearing body are processed by a bench worker.
And a box: the upper bearing body and the lower bearing body are connected together by a reamed hole bolt, namely, the reamed hole bolt is inserted into the bottom hole of the non-threaded part of the lower bearing body from the unthreaded hole of the upper bearing body and the threaded part of the reamed hole bolt is screwed in the bottom hole of the threaded part of the lower bearing body. Because the processing of the workpiece is carried out by a numerical control turning and milling processing center, the processing precision of the workpiece is greatly improved by using the numerical control turning and milling processing center, the processing precision of connecting holes on the upper bearing body and the lower bearing body is very high, the external diameter of the non-threaded part of the reamed hole bolt is basically the same as the internal diameter of the bottom hole of the lower half part unthreaded hole of the upper bearing body and the non-threaded part of the lower bearing body, the reamed hole bolt belongs to small clearance fit, and a clearance zone of the clearance fit can reach H7/g6 (wherein H is the basic deviation of a reference hole, 7 is the tolerance grade of the reference hole, g is the basic deviation of a shaft, and 6 is the tolerance grade of the shaft). The reaming bolt can well play a role in positioning the upper bearing body and the lower bearing body, can effectively improve the assembly precision of a product, eliminates the installation error between the upper bearing body and the lower bearing body, and greatly increases the reliability of the whole bearing body. And because the upper bearing body and the lower bearing body are connected together by 4 reamed hole bolts, the connection device can provide connection pretightening force and anti-shearing force, so that the stress points of each acting force are more, the distribution is more uniform and scientific, and the connection effect and the mid-split positioning effect of the upper bearing body and the lower bearing body are obviously improved. Meanwhile, the upper bearing body and the lower bearing body are connected in a threaded manner, so that the connection between the upper bearing body and the lower bearing body has the advantages of reliable connection, convenience in assembly and disassembly and the like.
And finally, cleaning and protecting the surface of the tilting pad bearing body, and checking the size of the tilting pad bearing body to ensure that the product is qualified.
Referring to fig. 2, the tilting pad bearing body 10 is formed by connecting an upper bearing body 01 and a lower bearing body 02 which are processed on a numerical control turning and milling center, and the upper bearing body 01 and the lower bearing body 02 are connected together through a connecting hole 011 of the upper bearing body 01 and a connecting hole 021 of the lower bearing body 02 by a hinge hole bolt 03.
Referring to fig. 3, the reamed bore bolt 03 includes a nut 031, an upper half 032 and a lower half 033, wherein the upper half 032 is a non-threaded portion and the lower half 033 is a threaded portion.
The connecting holes 011 of the upper bearing body 01 are two pairs of unthreaded holes respectively arranged on two sides of the upper bearing body 01, the inner diameter of the upper half portion of the unthreaded hole is matched with the outer diameter of a nut 031 of the reamed hole bolt 03, and the inner diameter of the lower half portion of the unthreaded hole is matched with the outer diameter of the upper half section 032 of the reamed hole bolt 03. The upper half of the connecting hole 021 of the lower bearing body 02 is a non-threaded bottom hole with the inner diameter matched with the outer diameter of the non-threaded part of the upper half 032 of the reamed-hole bolt 03, and the lower half of the connecting hole 021 of the lower bearing body 02 is a threaded bottom hole matched with the threaded part of the lower half 033 of the reamed-hole bolt 03. The reamed hole bolt 03 is inserted from the connection hole 011 of the upper bearing body 01 into the non-threaded part bottom hole of the upper half of the connection hole 021 of the lower bearing body 02, and the threaded part 033 of the reamed hole bolt 03 is screwed into the threaded part bottom hole of the lower half of the connection hole 021 of the lower bearing body 02.
Because the external diameter of the non-threaded part of the upper half 032 of the reamed hole bolt 03 is basically the same as the internal diameter of the unthreaded hole of the lower half of the upper bearing body 01 and the bottom hole of the non-threaded part of the lower bearing body 02, the reamed hole bolt 03 belongs to small clearance fit, and the tolerance band of the clearance fit can reach H7/g6, the reamed hole bolt 03 can well play a role in positioning the upper bearing body 01 and the lower bearing body 02, the assembly precision of a product can be effectively improved, the installation error between the upper bearing body 01 and the lower bearing body 02 is eliminated, and the reliability of the whole tilting pad bearing body 10 is greatly improved.
Moreover, each side of the joint of the two sides of the upper bearing body 01 and the lower bearing body 02 is connected through two hinged hole bolts 03, so that the upper bearing body 01 and the lower bearing body 02 are connected together through 4 hinged hole bolts 03, the connection pretightening force and the shearing resistance force can be provided, the stress points of each acting force are more, the distribution is more uniform and scientific, and the connection effect and the mid-plane positioning effect of the upper bearing body 01 and the lower bearing body 02 are obviously improved. Meanwhile, the connection form of the upper bearing body 01 and the lower bearing body 02 belongs to threaded connection, so that the connection between the upper bearing body 01 and the lower bearing body 02 also has the advantages of reliable connection, convenient assembly and disassembly and the like.
The numerical control turn-milling machining center is a turn-milling composite machining center with the model number of DMG CTX-GAMMA-2000TC, is a main model of a composite machining machine tool, can realize milling machining processes such as plane milling, drilling, tapping, groove milling and the like on the numerical control turn-milling machining center, has composite functions such as turning, milling, boring and the like, and can realize the machining process of completing the processes in one-time clamping and the whole process. By using the numerical control turning and milling machining center, the product manufacturing process chain can be shortened, the production efficiency is improved, the clamping times can be reduced, and the machining precision is improved.
According to the method for processing the tilting pad bearing body, the quality and the reliability of the tilting pad bearing body are remarkably improved, the processing precision and the surface roughness of a workpiece are also remarkably improved, and the problems of staggered deformation and the like of a product in the using process are solved. Compared with the prior art, the invention realizes the purposes of shortening the production period, improving the product quality and reducing the production cost.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A method for processing a tilting pad bearing body is characterized by comprising the following steps:
roughly processing an upper bearing body and a lower bearing body through the procedures of scribing, sawing, planing and splitting and rough turning;
carrying out heat treatment on the upper bearing body and the lower bearing body after rough machining;
grinding a middle facet and a top facet of the upper bearing body and the lower bearing body after heat treatment to ensure that the heights of the upper bearing body and the lower bearing body are equal;
performing finish machining in a numerical control turning and milling machining center according to a pre-programmed machining program, wherein the finish machining comprises clamping and tool setting, setting machining parameters, finish turning a workpiece and milling and drilling the workpiece;
processing each hole of the middle section by a bench worker;
and the upper bearing body and the lower bearing body are connected together by a reamed hole bolt to form the tilting pad bearing body.
2. The method for processing the tilting pad bearing body according to claim 1, wherein the heat treatment is a thermal refining treatment of heating, keeping warm and cooling with a coolant in an electric heating furnace for the roughly processed upper bearing body and the lower bearing body, so that the Brinell hardness HB of the upper bearing body and the lower bearing body is 250-300N/mm2。
3. The method of claim 1 wherein said setting of machining parameters includes setting of spindle speed, feed speed, plunge, and selection of tool type and tool speed.
4. The method of claim 1, wherein said finish turning the workpiece comprises respectively machining the outer circumference, the end surface and the inner bore of the upper bearing body and the lower bearing body, and respectively finish turning the end surfaces of the upper bearing body and the lower bearing body after automatically adjusting the clamping direction; the milling and drilling process for the workpiece comprises the following steps: milling a pit at the joint of the upper bearing body and the lower bearing body, processing a connecting hole at the joint of the upper bearing body and the lower bearing body, finely reaming and tapping the connecting holes of the upper bearing body and the lower bearing body, milling and drilling anti-rotation pin holes, hoisting holes, oil inlet holes, tile positioning screw holes and vibration measuring probe mounting frame holes on the upper bearing body and the lower bearing body, and tapping.
5. The method for machining a tilting pad bearing body according to claim 4, wherein the step of machining the connecting hole of the upper bearing body is to mill a smooth hole on the upper bearing body, and the step of machining the connecting hole of the lower bearing body is to mill a bottom hole of a non-threaded part and a bottom hole of a threaded part on the lower bearing body.
6. The method for processing the tilting pad bearing body according to claim 5, wherein the connecting holes of the upper bearing body are two pairs of unthreaded holes respectively arranged at two sides of the upper bearing body, and the upper half unthreaded hole and the lower half unthreaded hole of the unthreaded holes are the same; the connecting hole of the lower bearing body comprises an upper half part which is a bottom hole of a non-threaded part and a lower half part which is a bottom hole of a threaded part, and the inner diameter of a smooth hole of the lower half part of the upper bearing body is the same as the inner diameter of the bottom hole of the non-threaded part of the lower bearing body.
7. The method of claim 6, wherein the reamed hole bolt comprises a nut, an upper half and a lower half, the upper half being a non-threaded portion and the lower half being a threaded portion, the nut having an outer diameter matching an inner diameter of the upper bearing body upper half unthreaded hole, the reamed hole bolt having an outer diameter matching an inner diameter of the upper bearing body lower half unthreaded hole and the lower bearing body non-threaded portion bottom hole.
8. The method of fabricating a tilting pad bearing body according to claim 7 wherein said non-threaded portion of said reamed bore bolt is in clearance fit with said lower half unthreaded bore of said upper bearing body and said non-threaded bottom bore of said lower bearing body, said clearance fit having a tolerance band of H7/g6, wherein H is the base offset of the reference bore, 7 is the tolerance rating of the reference bore, g is the base offset of the shaft, and 6 is the tolerance rating of the shaft.
9. The method of claim 8 wherein said step of attaching said upper and lower bearing bodies together with a reamed hole bolt comprises inserting a reamed hole bolt through a smooth bore in said upper bearing body into a bottom bore in the non-threaded portion of said lower bearing body and threading a threaded portion of said reamed hole bolt into a bottom bore in the threaded portion of said lower bearing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610790250.9A CN106334905B (en) | 2016-08-31 | 2016-08-31 | A kind of processing method of tilting-pad bearing body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610790250.9A CN106334905B (en) | 2016-08-31 | 2016-08-31 | A kind of processing method of tilting-pad bearing body |
Publications (2)
| Publication Number | Publication Date |
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| CN106334905A true CN106334905A (en) | 2017-01-18 |
| CN106334905B CN106334905B (en) | 2018-12-21 |
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| CN201610790250.9A Active CN106334905B (en) | 2016-08-31 | 2016-08-31 | A kind of processing method of tilting-pad bearing body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107520582A (en) * | 2017-08-23 | 2017-12-29 | 沈阳鼓风机集团齿轮压缩机有限公司 | The processing method and device in bearing thrust face |
| CN108381122A (en) * | 2018-02-11 | 2018-08-10 | 广汉天空动力机械有限责任公司 | A kind of process for processing burner inner liner floating wall tile fragment using annular forging piece |
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| CN107520582A (en) * | 2017-08-23 | 2017-12-29 | 沈阳鼓风机集团齿轮压缩机有限公司 | The processing method and device in bearing thrust face |
| CN107520582B (en) * | 2017-08-23 | 2019-07-12 | 沈阳鼓风机集团齿轮压缩机有限公司 | The processing method and device in bearing thrust face |
| CN108381122A (en) * | 2018-02-11 | 2018-08-10 | 广汉天空动力机械有限责任公司 | A kind of process for processing burner inner liner floating wall tile fragment using annular forging piece |
| CN108381122B (en) * | 2018-02-11 | 2019-11-05 | 广汉天空动力机械有限责任公司 | A kind of process using annular forging piece processing burner inner liner floating wall tile fragment |
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