CN114310154B - Machining method of double oil pipes of controllable pitch propeller - Google Patents
Machining method of double oil pipes of controllable pitch propeller Download PDFInfo
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- CN114310154B CN114310154B CN202111335933.2A CN202111335933A CN114310154B CN 114310154 B CN114310154 B CN 114310154B CN 202111335933 A CN202111335933 A CN 202111335933A CN 114310154 B CN114310154 B CN 114310154B
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Abstract
The invention discloses a machining method of double oil pipes of a controllable pitch propeller, and belongs to the technical field of machining of parts of controllable pitch propellers. The outer pipe body without the support threaded hole, the tubular inner joint blank and the tubular outer joint blank have better strength and deformation resistance, and can reduce deformation. The inner pipe body and the tubular inner joint blank are welded to form a first piping structure, and the outer pipe body, the tubular outer joint blank and the double-pipe joint are welded to form a second piping structure, so that the connection, installation and machining are facilitated. A first thread groove, a support thread hole and a second thread groove are respectively processed on the outer peripheral wall of the tubular outer joint blank and the outer tube body and the tubular inner joint blank, and the relative positions are guaranteed. And finally welding the first pipe system structure and the second pipe system structure. And the double oil pipes of the controllable pitch propeller with better quality are obtained. The scrapping possibility is reduced, and the yield of the double oil pipes of the controllable pitch propeller is improved.
Description
Technical Field
The disclosure relates to the technical field of machining of adjustable pitch propeller parts, in particular to a machining method of double oil pipes of an adjustable pitch propeller.
Background
The double oil pipes of the controllable pitch propeller are parts of the controllable pitch propeller and are mainly used for transferring oil liquid in the controllable pitch propeller. The double oil pipes of the controllable pitch propeller comprise an inner pipe body, an outer pipe body, a cylindrical inner joint, a cylindrical outer joint and a double pipe joint, wherein the inner pipe body is coaxially inserted in the outer pipe body, the peripheral wall of the outer pipe body is provided with a plurality of supporting threaded holes, one end of the outer pipe body is coaxially connected with one end of the cylindrical outer joint, the inner wall of one end, far away from the outer pipe body, of the cylindrical outer joint is provided with a coaxial first threaded hole, one end of the inner pipe body is coaxially connected with the cylindrical inner joint, the inner wall of one end, far away from the inner pipe body, of the cylindrical inner joint is provided with a coaxial second threaded groove, and the other ends of the inner pipe body and the outer pipe body are coaxially connected with the double pipe joint.
The structure of the double oil pipes of the controllable pitch propeller is complex, the problems that the use strength of the double oil pipes of the controllable pitch propeller is not good and the service life is short are easily caused in casting molding, and the welding molding has the problems that the structure is not changed, the division is not changed and the welding deformation influences greatly, so that the quality problem is easily caused in the use process of the double oil pipes of the controllable pitch propeller and the scrapping is caused, and the yield of the double oil pipes of the controllable pitch propeller is low.
Disclosure of Invention
The embodiment of the disclosure provides a method for machining a double-oil pipe of a controllable-pitch propeller, which can improve the machining quality of the double-oil pipe of the controllable-pitch propeller, reduce the rejection rate of the double-oil pipe of the controllable-pitch propeller and improve the yield of the double-oil pipe of the controllable-pitch propeller. The technical scheme is as follows:
the embodiment of the disclosure provides a method for processing a double oil pipe of a controllable pitch propeller, which comprises the following steps:
providing an inner pipe body, a tubular inner joint blank, an outer pipe body, a tubular outer joint blank and a double-pipe joint;
welding the outer pipe body and the cylindrical outer joint blank to form a first pipe system structure;
welding the inner pipe body, the cylindrical inner joint blank and the double-pipe-body joint to form a second pipe system structure;
respectively processing a first thread groove, a support thread hole and a second thread groove on the tubular outer joint blank, the outer peripheral wall of the outer pipe body and the tubular inner joint blank to obtain a complete tubular outer joint and a complete tubular inner joint;
the first piping structure and the second piping structure are welded, one end, away from the cylindrical outer joint, of the outer pipe body of the first piping structure is welded with the peripheral wall of the double-pipe-body joint of the second piping structure, and the connecting bolts inserted into the supporting threaded holes are welded with the peripheral wall of the outer pipe body.
Optionally, the processing a first thread groove, a support thread hole, and a second thread groove in the tubular outer joint blank, the outer peripheral wall of the outer tube body, and the tubular inner joint blank respectively to obtain a complete tubular outer joint and a complete tubular inner joint includes:
finely machining the end face and the peripheral wall of the tubular outer joint blank;
processing the first coaxial thread groove at one end of the cylindrical outer joint blank, which is far away from the outer pipe body, and obtaining a cylindrical outer joint;
processing a plurality of support threaded holes in the outer peripheral wall of the outer pipe body, wherein the support threaded holes are distributed at equal intervals along the circumferential direction of the outer pipe body;
and a second coaxial thread groove is machined at one end, far away from the inner pipe body, of the tubular inner joint blank.
Optionally, a lathe is used for finishing the outer peripheral wall of the tubular outer joint blank and machining the first thread groove.
Optionally, the processing of the first thread groove, the support thread hole, and the second thread groove in the tubular outer joint blank, the outer peripheral wall of the outer tube body, and the tubular inner joint blank respectively to obtain a complete tubular outer joint and a complete tubular inner joint further includes:
and after a plurality of supporting threaded holes are machined in the outer peripheral wall of the outer pipe body, and before a coaxial second threaded groove is machined in one end, far away from the inner pipe body, of the cylindrical inner joint blank, the end face, the inner peripheral wall and the outer peripheral wall of the cylindrical inner joint blank are subjected to finish machining.
Optionally, the welding the first and second tubing structures comprises:
welding one end of the outer pipe body of the first pipe system structure, which is far away from the cylindrical outer joint, with the outer peripheral wall of the double-pipe-body joint of the second pipe system structure;
and welding the connecting bolt inserted into the supporting threaded hole and the peripheral wall of the outer pipe body.
Optionally, the method for machining the double oil pipes of the controllable pitch propeller further comprises: after a first thread groove, a support thread hole and a second thread groove are respectively processed on the cylindrical outer joint blank, the outer peripheral wall of the outer pipe body and the cylindrical inner joint blank, before the first piping structure and the second piping structure are welded,
providing a connecting and supporting barrel, wherein the outer peripheral wall and the inner peripheral wall of the connecting and supporting barrel are respectively provided with a thread matched with the first thread groove and the second thread groove;
the cylindrical outer joint in the first piping structure and the cylindrical inner joint in the second piping structure are respectively connected and matched with the outer peripheral wall and the inner peripheral wall of the connecting and supporting barrel
Connecting bolts are inserted into the plurality of support threaded holes of the outer peripheral wall in the first piping structure.
Optionally, the end of the connection support barrel remote from the first piping structure has a coaxial mounting post having a diameter smaller than the smallest outer diameter of the connection support barrel.
Optionally, said inserting a connecting bolt into each of a plurality of said support threaded holes of said outer peripheral wall in said first piping structure comprises:
inserting a connecting bolt into each supporting threaded hole;
and rotating the connecting bolt in each supporting threaded hole until the depth of each connecting bolt extending into the supporting threaded hole is the same, and abutting one end of each connecting bolt in the outer pipe body against the outer peripheral wall of the inner pipe body.
Optionally, the method for machining the double oil pipes of the controllable pitch propeller further comprises:
after welding the first and second piping structures, finish machining the double pipe joint.
Optionally, the end face of the double pipe body joint and the outer peripheral wall of the double pipe body joint are finish-machined.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
the inner pipe body, the tubular inner joint blank, the outer pipe body, the tubular outer joint blank and the double-pipe joint are provided, the strength and the deformation resistance of the outer pipe body without more threaded holes, the tubular inner joint blank and the tubular outer joint blank are better, and the deformation generated by the double oil pipes of the pitch propeller in the subsequent specific welding process can be reduced. The outer pipe body and the tubular outer joint blank are welded firstly to form a first piping structure, and then the inner pipe body, the tubular inner joint blank and the double-pipe joint are welded to form a second piping structure, so that the connection and installation of the structures and the machining of a threaded hole or a groove can be facilitated. The first thread groove, the supporting thread hole and the second thread groove are respectively machined in the tubular outer joint blank, the outer peripheral wall of the outer tube body and the tubular inner joint blank, the complete tubular outer joint and the tubular inner joint are obtained, and the relative positions of the machined thread grooves and the machined thread holes relative to other structures can also be guaranteed due to the fact that the first piping structure and the second piping structure are complete. And finally, welding the first piping structure and the second piping structure, wherein one end of the outer pipe body of the first piping structure, which is far away from the cylindrical outer joint, is welded with the outer peripheral wall of the double-pipe body joint of the second piping structure, and the connecting bolt inserted into the supporting threaded hole is welded with the outer peripheral wall of the outer pipe body. The double oil pipes of the controllable pitch propeller with good quality, small deformation and accurate relative position can be obtained. The possibility that the double oil pipes of the controllable pitch propeller are scrapped due to quality problems in the machining process can be reduced, and the yield of the double oil pipes of the controllable pitch propeller is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a side view of a dual fuel pipe of a controllable pitch propeller provided by an embodiment of the present disclosure;
FIG. 2 is a C-C sectional view of a dual-fuel pipe of a controllable pitch propeller provided by an embodiment of the disclosure;
fig. 3 is a flowchart of a method for processing a dual oil pipe of a controllable pitch propeller according to an embodiment of the present disclosure;
FIG. 4 is a flow chart of another processing method of the double oil pipes of the controllable pitch propeller provided by the embodiment of the disclosure;
fig. 5 to 15 are schematic views of a machining process of a double oil pipe of the controllable pitch propeller provided by the embodiment of the disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," "third," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", "top", "bottom", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
For the purpose of understanding, the present disclosure will be described below with reference to the accompanying drawings. First, fig. 1 and 2 are provided, fig. 1 is a side view of a dual oil pipe of a controllable pitch propeller according to an embodiment of the present disclosure, fig. 2 is a C-C cross-sectional view of the dual oil pipe of the controllable pitch propeller according to the embodiment of the present disclosure, as can be seen from fig. 1 and 2, the dual oil pipe of the controllable pitch propeller includes an inner pipe 1, an outer pipe 2, a cylindrical inner joint 3, a cylindrical outer joint 4, and a dual oil pipe joint 5, the inner pipe 1 is coaxially inserted into the outer pipe 2, a circumferential wall of the outer pipe 2 has a plurality of supporting threaded holes 21, one end of the outer pipe 2 is coaxially connected to one end of the cylindrical outer joint 4, an inner wall of the outer joint 4 at an end away from the outer pipe 2 has a coaxial first threaded groove 41, one end of the inner pipe 1 is coaxially connected to the cylindrical inner joint 3, an inner wall of the cylindrical inner joint 3 at an end away from the inner pipe 1 has a coaxial second threaded groove 31, and the other ends of the inner pipe 1 and the inner pipe 2 are coaxially connected to the dual oil pipe joint 5. The double pipe joint 5 has a first oil hole 51 communicating with the inner pipe 1 and a second oil hole 52 communicating with a space formed by the inner peripheral wall of the outer pipe 2 and the outer peripheral wall of the inner pipe 1.
Fig. 3 is a flowchart of a processing method of a double oil pipe of a controllable pitch propeller according to an embodiment of the present disclosure, and as can be seen from fig. 3, a processing method of a double oil pipe of a controllable pitch propeller according to an embodiment of the present disclosure includes:
s101: an inner tube, a tubular inner joint blank, an outer tube, a tubular outer joint blank and a double tube joint are provided.
S102: and welding the outer pipe body and the cylindrical outer joint blank to form a first pipe system structure.
S103: and welding the inner pipe body, the cylindrical inner joint blank and the double pipe body joint to form a second pipe system structure.
S104: and respectively processing a first thread groove, a support thread hole and a second thread groove on the tubular outer joint blank, the outer peripheral wall of the outer pipe body and the tubular inner joint blank to obtain the complete tubular outer joint and tubular inner joint.
S105: the first piping structure and the second piping structure are welded, one end of the outer pipe body of the first piping structure, which is far away from the cylindrical outer joint, is welded with the outer peripheral wall of the double-pipe body joint of the second piping structure, and the connecting bolt inserted into the supporting threaded hole is welded with the outer peripheral wall of the outer pipe body.
The inner pipe body, the tubular inner joint blank, the outer pipe body, the tubular outer joint blank and the double-pipe joint are provided, the strength and the deformation resistance of the outer pipe body without more threaded holes, the tubular inner joint blank and the tubular outer joint blank are better, and the deformation generated by the double oil pipes of the pitch propeller in the subsequent specific welding process can be reduced. The outer pipe body and the tubular outer joint blank are welded firstly to form a first piping structure, and then the inner pipe body, the tubular inner joint blank and the double-pipe joint are welded to form a second piping structure, so that the connection and installation of the structures and the machining of a threaded hole or a groove can be facilitated. The first thread groove, the supporting thread hole and the second thread groove are respectively processed on the outer peripheral wall of the tubular outer joint blank and the outer tubular body and the tubular inner joint blank to obtain the complete tubular outer joint and the tubular inner joint, and the relative positions of the processed thread grooves and the processed thread holes relative to other structures can also be ensured because the first piping structure and the second piping structure are complete. And finally welding the first piping structure and the second piping structure, wherein one end of the outer pipe body of the first piping structure, which is far away from the cylindrical outer joint, is welded with the peripheral wall of the double-pipe-body joint of the second piping structure, and the connecting bolt inserted into the supporting threaded hole is welded with the peripheral wall of the outer pipe body. The double oil pipes of the controllable pitch propeller with good quality, small deformation and accurate relative position can be obtained. The possibility that the double oil pipes of the controllable pitch propeller are scrapped due to quality problems in the machining process can be reduced, and the yield of the double oil pipes of the controllable pitch propeller is improved.
After the two oil pipes are welded into a whole, the first thread groove, the support threaded hole and the second thread groove are machined, so that the relative positions of the grooves can be conveniently determined, and the machining quality of the finally obtained double oil pipes of the controllable pitch propeller is ensured. And in the course of working, will roll adjustment oar two oil pipes form first piping structure and second piping structure respectively and process after, weld first piping structure and second piping structure again at last, even first piping structure or second piping structure go wrong, what scrapped is also first piping structure or second piping structure, can weld again intact second piping structure or intact first piping structure, and not roll adjustment oar two oil pipe whole scrappings, also can reduce extravagantly.
Optionally, step S104 includes:
finely machining the end face and the peripheral wall of the cylindrical outer joint blank; processing a first coaxial thread groove at one end of the cylindrical outer joint blank, which is far away from the outer pipe body, and obtaining a cylindrical outer joint; a plurality of supporting threaded holes are processed on the outer peripheral wall of the outer pipe body and are distributed at equal intervals along the circumferential direction of the outer pipe body; and a coaxial second thread groove is processed at one end of the cylindrical inner joint blank, which is far away from the inner pipe body.
Before processing out specific screw hole or thread groove on the tube-shape external joint blank, carry out the finish machining to the terminal surface and the periphery wall of tube-shape external joint blank earlier, can get rid of the deformation that probably exists on the tube-shape external joint that leads to by the welding on the one hand, the terminal surface and the periphery wall of the tube-shape external joint blank after the finish machining of on the other hand can regard as the processing benchmark of first thread groove, obtain relative position more for accurate and better first thread groove of quality, improve the quality of the double oil pipe of pitch adjustment oar that finally obtains. In the processing process, a cylindrical outer joint blank with better strength is processed firstly, an outer pipe body with relatively poor strength is processed, the quality of a first thread groove and a supporting thread hole which are processed on the first pipe system structure can be ensured, and finally a second thread groove at one end of the cylindrical inner joint blank, which is far away from the inner pipe body, is processed. The obtained tubular outer joint and tubular inner joint have good quality.
Alternatively, the outer peripheral wall of the barrel-shaped outer joint blank is finished and the first thread groove is machined by a lathe.
The end face and the peripheral wall of the tubular outer joint blank are subjected to finish machining through the lathe, the first thread groove is machined through the lathe, the machining efficiency of the first piping structure can be improved, the position of the first piping structure does not need to be moved for multiple times in the machining process, and the machining quality of the first thread groove can be guaranteed to be improved.
Optionally, step S104 further includes:
and after a plurality of supporting threaded holes are machined in the outer peripheral wall of the outer pipe body, and before a coaxial second threaded groove is machined in one end, far away from the inner pipe body, of the cylindrical inner joint blank, the end face, the inner peripheral wall and the outer peripheral wall of the cylindrical inner joint blank are subjected to finish machining.
And the second thread groove is machined to finish the end face and the peripheral wall of the tubular inner joint blank, so that the machining quality of the obtained second thread groove can be improved, the quality of the finally obtained double oil pipes of the pitch propeller is improved, and the possibility of scrapping of the double oil pipes of the pitch propeller due to the problem of machining quality is reduced.
The finish machining of the end face may be performed by milling, and the finish machining of the outer peripheral wall and the inner peripheral wall may be performed by turning.
Fig. 4 is a flowchart of another processing method of a double oil pipe of a controllable pitch propeller according to an embodiment of the present disclosure, and referring to fig. 4, the processing method of a crank pin of the controllable pitch propeller may further include:
s201: an inner tube, a tubular inner joint blank, an outer tube, a tubular outer joint blank and a double tube joint are provided.
In one implementation provided by the present disclosure, the inner tube, the tubular inner joint blank, the outer tube, the tubular outer joint blank, and the double tube joint may be machined from steel plates. The preparation of the double oil pipes of the controllable pitch propeller is convenient and the overall quality is better.
In other implementations provided by the present disclosure, the materials of the inner tube, the tubular inner joint blank, the outer tube, the tubular outer joint blank, and the double tube joint may also be other alloy materials or made of a steel tube directly, which is not limited by the present disclosure.
Exemplarily, the step S201 further includes: and performing finish machining on the surfaces of the inner pipe body, the tubular inner joint blank, the outer pipe body, the tubular outer joint blank and the double-pipe-body joint. The quality of the inner pipe body, the tubular inner joint blank, the outer pipe body, the tubular outer joint blank and the double-pipe-body joint can be improved, and the quality of subsequent welding and machining is guaranteed.
For ease of understanding, fig. 5-8 are provided herein, and fig. 5-8 are a front view and a cross-sectional view of the outer tubular body 2, the tubular outer joint blank 100, and the double tubular body 5, respectively, showing the tubular outer joint blank 100 without a threaded groove and the outer tubular body 2 without a supporting threaded hole.
It should be noted that, since the structure of the inner tube and the structure of the outer tube are not different except for the tube diameter, the structure diagram of the inner tube may refer to the structure diagram of the outer tube, and details are not repeated here.
S202: and welding the outer pipe body and the cylindrical outer joint blank to form a first pipe system structure.
Optionally, when the outer tube body and the tubular outer joint blank are welded, a groove formed by the outer tube body and the tubular outer joint blank can be symmetrically welded. The deformation of the outer pipe body and the cylindrical outer joint blank during welding can be reduced, and the welding quality of the obtained first pipe system structure is improved.
S203: and welding the inner pipe body, the cylindrical inner joint blank and the double pipe body joint to form a second pipe system structure.
For example, in step S203, the groove between the inner pipe body and the tubular inner joint blank may be welded symmetrically. The quality of the obtained inner pipe body and the cylindrical inner joint blank can be improved.
It should be noted that, the symmetric welding may be performed by equally dividing an annular groove between the inner tube body and the tubular inner joint blank into two sections along the circumferential direction, and simultaneously welding the two sections of grooves, one in the clockwise direction and the other in the counterclockwise direction. The deformation generated during welding of the two sections can be offset, so that the welding deformation generated between the inner pipe body and the cylindrical inner joint blank is reduced, and the finally obtained second pipe system structure is improved. The inner tube and the tubular inner joint blank may be welded in the same manner as the inner tube and the tubular inner joint blank.
Fig. 9 and 10 show schematic views of a first piping structure and a second piping structure, respectively, and fig. 9 and 10 show views of the first piping structure and the second piping structure, respectively, and it can be seen that welding has been performed between the inner pipe 1 and the cylindrical inner joint blank 200 and welding has been performed between the outer pipe 2 and the cylindrical outer joint blank 100 in fig. 9 and 10.
S204: and respectively processing a first thread groove, a support thread hole and a second thread groove on the tubular outer joint blank, the outer peripheral wall of the outer pipe body and the tubular inner joint blank to obtain the complete tubular outer joint and the tubular inner joint.
Step S204 may refer to step S104 of the method for machining a dual oil pipe with a controllable pitch propeller provided in fig. 3, and therefore, the details are not repeated here.
For ease of understanding, fig. 11-13 can be provided herein, and fig. 11-13 are schematic structural views of the first piping structure after the first threaded groove is machined, the first piping structure after the supporting threaded hole is machined, and the second piping structure after the second threaded groove is machined, and referring to fig. 11-13, the first threaded groove 41, the supporting threaded hole 21, and the second threaded groove 31 are machined.
S205: providing a connecting and supporting barrel, wherein the outer peripheral wall and the inner peripheral wall of the connecting and supporting barrel are respectively provided with a thread matched with the first thread groove and the second thread groove; and connecting bolts are inserted into a plurality of supporting threaded holes of the outer peripheral wall in the first piping structure in a connecting and supporting way and a plurality of supporting threaded holes of the inner peripheral wall in the second piping structure in a connecting and supporting way respectively.
Between welding first piping structure and second piping structure, earlier be connected first piping structure and second piping structure through the joint support expert, the joint support bucket can play the effect of supporting and fixing a position between first piping structure and the second piping structure, guarantees the degree of accuracy of the relative position of first piping structure and second piping structure to guarantee the relative position and the welding quality of first piping structure and second piping structure that follow-up welding obtained. And insert connecting bolt in supporting the threaded hole, connecting bolt can play the supporting role as the partly of the two oil pipe of roll adjustment oar to the internal body on the one hand, on the other hand connecting bolt itself can play further positioning action to first piping structure and second piping structure, further guarantee the degree of accuracy of the relative position between first piping structure and the second piping structure, improve the final processingquality who obtains the two oil pipe of roll adjustment oar, reduce the two oil pipe of roll adjustment oar and appear condemned possibility because of quality problems, improve the yield of the two oil pipe of roll adjustment oar.
Step S205 may include:
the end of the connecting and supporting barrel far away from the first piping structure is provided with a coaxial mounting column, and the diameter of the mounting column is smaller than the minimum outer diameter of the connecting and supporting barrel.
The connecting and supporting barrel is provided with the coaxial mounting column with smaller diameter at one end far away from the first piping structure, the mounting column can play a role in convenient installation, and the connecting and supporting barrel, the first piping structure and the second piping structure can be dismounted by rotating the mounting column.
In other implementation manners provided by the present disclosure, the mounting posts may also be set to be hexagonal structures, which may further facilitate the disassembly and assembly of the connecting support barrel.
Optionally, inserting connecting bolts into each of a plurality of support threaded holes of the outer peripheral wall in the first piping structure, comprises:
inserting a connecting bolt into each supporting threaded hole; and rotating the connecting bolt in each supporting threaded hole until the depth of each connecting bolt extending into the supporting threaded hole is the same, and enabling one end of each connecting bolt located in the outer pipe body to abut against the outer peripheral wall of the inner pipe body.
The step of inserting the connecting bolt into each supporting threaded hole is as shown above, the connecting bolt can also complete the adjustment of the accuracy of the relative position between the outer pipe body and the inner pipe body in the installation process, and the accuracy of the relative position between the inner pipe body and the outer pipe body is improved, so that the machining quality of the finally machined double-oil pipe of the controllable pitch propeller is improved.
To facilitate understanding, fig. 14 is provided herein, and fig. 14 is a structural view after the installation of the connection support barrel and the connection bolt, and referring to fig. 14, the relative positional relationship between the connection support barrel 300 and the first and second piping structures, and the relative positional relationship between the connection bolt 400 and the first and second piping structures can be known.
S206: the first piping structure and the second piping structure are welded, one end of the outer pipe body of the first piping structure, which is far away from the cylindrical outer joint, is welded with the outer peripheral wall of the double-pipe body joint of the second piping structure, and the connecting bolt inserted into the supporting threaded hole is welded with the outer peripheral wall of the outer pipe body.
Optionally, welding the first tubing structure to the second tubing structure comprises:
welding one end of the outer pipe body of the first piping structure, which is far away from the cylindrical outer joint, with the outer peripheral wall of the double-pipe joint of the second piping structure; and welding the connecting bolt inserted into the supporting threaded hole and the outer peripheral wall of the outer pipe body.
The step of welding the first piping structure and the second piping structure is as shown above, so that the deformation of the first piping structure and the second piping structure in the machining process can be reduced, and the machining quality of the finally obtained double oil pipes of the controllable pitch propeller is improved.
In addition, since the groove between the first pipe system structure and the second pipe system structure is also generally an annular groove, a symmetric welding method may be adopted for welding the first pipe system structure and the second pipe system structure. The welding quality between the first piping structure and the second piping structure can be improved.
S207: and (3) welding the first pipe system structure and the second pipe system structure, and then performing finish machining on the double-pipe body joint.
After the first piping structure and the second piping structure are welded, the double-pipe joint is dropped for finish machining, the deformation part of the double-pipe joint caused by welding can be removed, and the final machining quality of the double-pipe joint is improved so as to improve the machining quality of the finally obtained double oil pipes of the controllable pitch propeller.
Alternatively, the end face of the double tube joint and the outer peripheral wall of the double tube joint are finished. The obtained double-pipe joint has better quality.
In other implementation manners provided by the present disclosure, the outer peripheral wall of the outer tube body can be further lathed, and the processing quality of the outer peripheral wall of the outer tube body can be further improved.
For ease of understanding, figure 15 may be provided herein, with several faces a machined for a double pipe joint shown in figure 15.
Although the present disclosure has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the disclosure.
Claims (10)
1. The machining method of the double oil pipes of the controllable pitch propeller is characterized by comprising the following steps of:
providing an inner pipe body, a tubular inner joint blank, an outer pipe body, a tubular outer joint blank and a double-pipe joint;
welding the outer pipe body and the cylindrical outer joint blank to form a first pipe system structure;
welding the inner pipe body, the cylindrical inner joint blank and the double-pipe-body joint to form a second pipe system structure;
respectively processing a first thread groove, a support thread hole and a second thread groove on the tubular outer joint blank, the outer peripheral wall of the outer pipe body and the tubular inner joint blank to obtain a complete tubular outer joint and a complete tubular inner joint;
welding the first piping structure and the second piping structure, welding one end of the cylindrical outer joint far away from the outer pipe body of the first piping structure and the outer peripheral wall of the double-pipe-body joint of the second piping structure, and welding the connecting bolt inserted into the supporting threaded hole and the outer peripheral wall of the outer pipe body.
2. The method for machining the double oil pipes of the controllable pitch propeller according to claim 1, wherein a first thread groove, a support thread hole and a second thread groove are respectively machined in the tubular outer joint blank, the outer peripheral wall of the outer pipe body and the tubular inner joint blank to obtain a complete tubular outer joint and a complete tubular inner joint, and the method comprises the following steps:
finely machining the end face and the peripheral wall of the cylindrical outer joint blank;
processing the first coaxial thread groove at one end of the tubular outer joint blank far away from the outer pipe body to obtain a tubular outer joint;
a plurality of supporting threaded holes are machined in the outer peripheral wall of the outer pipe body and are distributed at equal intervals along the circumferential direction of the outer pipe body;
and a coaxial second thread groove is machined at one end of the cylindrical inner joint blank, which is far away from the inner pipe body.
3. The method for machining the double oil pipes of the controllable pitch propeller as claimed in claim 2, wherein a lathe is used to finish machine the outer peripheral wall of the cylindrical outer joint blank and machine the first thread groove.
4. The method for processing the dual oil pipes of the controllable pitch propeller as claimed in claim 2, wherein a first thread groove, a supporting thread hole and a second thread groove are respectively processed on the blank of the cylindrical outer joint, the outer peripheral wall of the outer pipe body and the blank of the cylindrical inner joint to obtain a complete cylindrical outer joint and a complete cylindrical inner joint, further comprising:
and after a plurality of supporting threaded holes are machined in the outer peripheral wall of the outer pipe body, and before a coaxial second threaded groove is machined in one end, far away from the inner pipe body, of the cylindrical inner joint blank, the end face, the inner peripheral wall and the outer peripheral wall of the cylindrical inner joint blank are subjected to finish machining.
5. The method of machining a dual pitch propeller tubing string as claimed in any one of claims 1~4 wherein said welding said first tubing structure to said second tubing structure comprises:
welding one end of the outer pipe body of the first pipe system structure, which is far away from the cylindrical outer joint, with the outer peripheral wall of the double-pipe-body joint of the second pipe system structure;
and welding the connecting bolt inserted into the supporting threaded hole and the outer peripheral wall of the outer pipe body.
6. The method for machining the double oil pipe with the controllable pitch propeller of claim 1~3, wherein the method for machining the double oil pipe with the controllable pitch propeller further comprises the following steps: after a first thread groove, a support thread hole and a second thread groove are respectively processed on the cylindrical outer joint blank, the outer peripheral wall of the outer pipe body and the cylindrical inner joint blank, before the first piping structure and the second piping structure are welded,
providing a connecting and supporting cylinder, wherein the outer peripheral wall and the inner peripheral wall of the connecting and supporting cylinder are respectively provided with a thread matched with the first thread groove and the second thread groove;
the cylindrical outer joint in the first piping structure and the cylindrical inner joint in the second piping structure are respectively connected and matched with the outer peripheral wall and the inner peripheral wall of the connecting and supporting cylinder;
connecting bolts are inserted into the plurality of support threaded holes of the outer peripheral wall in the first piping structure.
7. The method for machining the double oil pipes of the controllable pitch propeller as claimed in claim 6, wherein the end of the connecting and supporting cylinder, which is far away from the first piping structure, is provided with a coaxial mounting column, and the diameter of the mounting column is smaller than the minimum outer diameter of the connecting and supporting cylinder.
8. The method for machining a dual oil pipe of a controllable pitch propeller according to claim 6, wherein connecting bolts are inserted into a plurality of supporting threaded holes of the outer peripheral wall in the first piping structure, and the method comprises the following steps:
inserting a connecting bolt into each supporting threaded hole;
and rotating the connecting bolt in each supporting threaded hole until the depth of each connecting bolt extending into the supporting threaded hole is the same, and abutting one end of each connecting bolt in the outer pipe body against the outer peripheral wall of the inner pipe body.
9. The method for machining a double oil pipe of a controllable pitch propeller according to any one of claims 1~4, wherein the double oil pipe of the controllable pitch propeller comprises,
the processing method of the double oil pipes of the controllable pitch propeller further comprises the following steps:
after welding the first and second piping structures, finish machining the double pipe joint.
10. The method for machining the dual-oil pipe of the controllable pitch propeller of claim 9, wherein the end face of the dual-pipe body joint and the outer peripheral wall of the dual-pipe body joint are subjected to finish machining.
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