CN117686341B

CN117686341B - Intensity detection tool and detection method for titanium alloy universal joint for deep sea communication

Info

Publication number: CN117686341B
Application number: CN202410156367.6A
Authority: CN
Inventors: 孙宏喆; 乔海滨; 贾国成; 麻毅; 孙冰
Original assignee: Luoyang Sunrui Titanium Precision Casting Co Ltd
Current assignee: Luoyang Sunrui Titanium Precision Casting Co Ltd
Priority date: 2024-02-04
Filing date: 2024-02-04
Publication date: 2024-05-10
Anticipated expiration: 2044-02-04
Also published as: CN117686341A

Abstract

The invention provides a strength detection tool and a strength detection method for a titanium alloy universal joint for deep sea communication, wherein the detection tool comprises a tail ring fixing chuck, is fixedly connected with a tail ring and can be clamped by a longitudinal tensile testing machine for tensile detection; the first end of the first ring fixed chuck is fixedly connected with the first ring, and the second end of the first ring fixed chuck is connected with the first end of the chuck shackle connecting piece; the second end of the chuck shackle connecting piece is provided with a first shackle; the first shackle is buckled with the second shackle; the first end of the second shackle is used for being buckled with the first shackle, the second shackle and the first shackle can rotate relatively, and the second end of the second shackle is used for being connected with the bottom fixing piece; and the bottom fixing piece is used for being fixedly connected with the base of the longitudinal tensile testing machine. According to the invention, through the matched use of the two shackles in the detection tool, the flexible assembly of the titanium alloy universal joint during detection is realized, the influence of the tool on the detection result is avoided, and the detection accuracy is improved.

Description

Intensity detection tool and detection method for titanium alloy universal joint for deep sea communication

Technical Field

The invention relates to the technical field of detection of deep sea communication equipment, in particular to a strength detection tool and a detection method of a titanium alloy universal joint for deep sea communication.

Background

The ocean optical communication network is an optical communication network for carrying out information communication based on the submarine optical cable as a transmission carrier, and is an important component of the ocean information network. The ocean optical communication network currently carries more than 95% of international communication information transmission worldwide, is an important information carrier and a basic network for global communication, and plays an important role increasingly and prominently along with the increasing frequency of international information interaction and the explosive growth of data traffic.

The ocean optical communication network is mainly applied to the scenes of international transoceanic submarine optical cable communication, submarine optical cable communication between continents and offshore islands, and the like. The international transoceanic submarine optical cable communication transmission distance can reach thousands to tens of thousands kilometers, and the submarine optical cable communication transmission distance between the continent, the offshore islands and the ocean islands can reach hundreds of kilometers. In the ultra-long distance underwater transmission process, signals can be attenuated along with the transmission distance, so that signals in the transmission process need to be amplified in a series of modes such as multiplexing, amplifying, shaping and compensating by using a submarine optical cable signal amplifier at intervals of a certain kilometer.

Because the working environment of the submarine optical cable signal amplifier is severe, the reinforced armor shell is required to be protected, the shell is required to resist seawater corrosion, the stress on the seabed, natural disasters (earthquakes, tsunamis and the like) and human factors (fisher salvage operations and the like) are borne, the service life of the submarine optical cable signal amplifier is more than 25 years, and the protective armor is a titanium alloy universal joint.

In order to ensure that the performance of the structural member of the universal joint meets the use requirements, the overall structural strength of the universal joint needs to be evaluated. The strength evaluation and development of the universal joint structural component are relatively early at present, a whole strength detection scheme of the universal joint structural component is established, the use strength of the universal joint structural component can be effectively evaluated, but the specific detection scheme and the detection tool are not known at present. Therefore, the domestic titanium alloy universal joint needs to be transported to abroad for detection and evaluation, and has high detection cost and long detection period, and seriously affects the delivery cycle and economic benefit of the product. At present, no related research on a detection method of the titanium alloy universal joint exists in China, detection evaluation equipment and a scheme are lacked, and when the current transverse stretching equipment is adopted for detection, the intensity numerical value difference detected by the universal joint in the same batch at home and abroad is large, so that the current transverse stretching equipment in China cannot be used for intensity detection and evaluation of the titanium alloy universal joint.

In the prior art, the titanium alloy universal joint for deep sea communication is usually required to be sent to a foreign detection mechanism for detection, and in the foreign detection, in order to ensure the accuracy of a detection result, the working environment of the titanium alloy universal joint for deep sea communication needs to be simulated, and a transverse stretching mode is adopted, so that a relatively accurate detection result is obtained. However, the scheme of simulating the stress state and the structure of the tool during the detection are not known in foreign detection. The technical problem is not broken through in domestic research, when the existing transverse stretching equipment or longitudinal stretching testing machine is adopted for detection, the detection results of the same batch of products are greatly different from the foreign detection results, and when the domestic transverse stretching equipment or longitudinal stretching testing machine is adopted for detection of the same batch of products, the detection results are also greatly different.

Disclosure of Invention

The technical problem to be solved by the invention is that under the current equipment condition, the whole strength of the titanium alloy universal joint for deep sea communication cannot be accurately and effectively detected and evaluated.

The invention discloses a strength detection tool for a titanium alloy universal joint for deep sea communication, which is used for a longitudinal tensile testing machine, wherein the universal joint comprises a head ring, a middle outer ring, a tail ring and a middle ring, the head ring, the middle outer ring and the tail ring are respectively connected with the middle ring to form the universal joint, and the detection tool comprises:

the tail ring fixing clamp is used for being fixedly connected with the tail ring and can be clamped by the longitudinal tensile testing machine for tensile detection;

The first end of the head ring fixing chuck is fixedly connected with the head ring, and the second end of the head ring fixing chuck is connected with the first end of the chuck shackle connecting piece;

The second end of the chuck shackle connecting piece is provided with a first shackle;

The first shackle is buckled with the second shackle;

the first end of the second shackle is used for being buckled with the first shackle, the second shackle and the first shackle can rotate relatively, and the second end of the second shackle is used for being connected with the bottom fixing piece;

The bottom fixing piece is used for being fixedly connected with the base of the longitudinal tensile testing machine.

Further, the tail ring includes tail ring body and tail ring lug the one side that the tail ring body kept away from the tail ring lug is provided with the constriction portion be provided with a plurality of first locating holes on the periphery of constriction portion, the fixed chuck of tail ring includes clamping part and first connecting portion, clamping part is used for the centre gripping loading of vertical tensile testing machine to stretch, first connecting portion can stretch into in the centre bore of constriction portion be provided with a plurality of second locating holes on the periphery of first connecting portion, the second locating hole corresponds the setting with first locating hole, and the locating pin passes in the first locating hole gets into the second locating hole for with the fixed chuck fixed connection of tail ring and tail ring.

Further, the head ring comprises a head ring body and a head ring lug, one side, far away from the head ring lug, of the head ring body is provided with first threads, the head ring fixing chuck comprises a second connecting portion and a third connecting portion, the second connecting portion is connected with the third connecting portion through an intermediate connecting rod, the second connecting portion is used for being fixedly connected with the head ring, the third connecting portion is used for being fixedly connected with a chuck shackle connecting piece, a first connecting groove is formed in the second connecting portion, second threads are formed in the inner side wall of the first connecting groove, and the second threads are used for being connected with the first threads in a matched mode so as to achieve fixed connection of the head ring and the head ring fixing chuck.

Further, the chuck shackle connecting piece comprises a fourth connecting portion and a fifth connecting portion, wherein the fourth connecting portion is used for being fixedly connected with the third connecting portion, the fifth connecting portion is used for being connected with the first shackle, a second connecting groove is formed in the fourth connecting portion, fourth threads are formed in the inner side wall of the second connecting groove, third threads are formed in the third connecting portion, the third threads are connected with the fourth threads in a matched mode, a first shackle connecting hole is formed in the fifth connecting portion, and the first shackle connecting hole is used for being connected with the first shackle.

Further, the first shackle connecting hole is in clearance fit with the pin of the first shackle.

Further, the bottom fixing piece comprises a connecting seat and a sixth connecting portion, wherein the connecting seat is used for being fixedly connected with the base of the longitudinal tensile testing machine, a second shackle connecting hole is formed in the sixth connecting portion, and the second shackle connecting hole is used for being connected with a second shackle.

Further, the second shackle connecting hole is in clearance fit with the pin of the second shackle.

Further, the detection tool further comprises a bottom auxiliary positioning piece, one end of the bottom auxiliary positioning piece is fixedly connected with the base of the longitudinal tensile testing machine, and the other end of the bottom auxiliary positioning piece is fixedly connected with the bottom fixing piece.

The invention also discloses a strength detection method of the titanium alloy universal joint for deep sea communication, which adopts the detection tool as described above, and comprises the following steps:

step S100: the detection tool and the universal joint are assembled and arranged on a longitudinal tensile testing machine in a matching way;

Step S200: carrying out a tensile test, loading at a first preset loading rate, maintaining for a first preset time when loading to the first preset loading rate, and continuing loading at the first preset loading rate until the universal joint breaks;

step S300: stress and strain data of the universal joint sample are collected in the tensile test process, and the collected data are processed and analyzed after the test is finished to obtain key strength parameters;

Step S400: and (5) ending the detection.

Further, step S100 includes:

Step S110: placing a tail ring fixing chuck on the universal joint, and fixedly connecting the tail ring fixing chuck with the tail ring of the universal joint;

Step S120: fixedly connecting the head ring fixing chuck with the head ring of the universal joint;

Step S130: arranging a universal joint connected with the tail ring fixing chuck and the head ring fixing chuck on a base of the longitudinal tensile testing machine, and controlling the longitudinal tensile testing machine to clamp the tail ring fixing chuck;

step S140: the longitudinal tensile testing machine drives the universal joint to ascend, and a chuck shackle connecting piece is arranged on the head ring fixed chuck;

step S150: a first shackle is arranged on the chuck shackle connecting piece;

step S160: hanging the second shackle on the first shackle;

Step S170: the bottom fixing piece is fixedly arranged on a base of the longitudinal tensile testing machine;

step S180: and controlling the longitudinal tensile testing machine to drive the universal joint to descend so that the second shackle is matched and connected with the bottom fixing piece.

Compared with the prior art, the strength detection tool and the detection method for the titanium alloy universal joint for deep sea communication have the following advantages:

By means of the arrangement of the detection tool, the existing longitudinal tensile testing machine can be used for detecting the strength of the titanium alloy universal joint for deep sea communication, the condition that torque is introduced during detection to influence the detection result is overcome, and the accuracy of universal joint detection is guaranteed;

By the matched use of the two shackles in the detection tool, the flexible assembly of the titanium alloy universal joint during detection is realized, the influence of the tool on the detection result is avoided, and the detection accuracy is improved;

The detection tool provided by the invention has a simple structure, is easy to assemble, can be used for accurately detecting the integral strength of the titanium alloy universal joint for deep sea communication by using the conventional longitudinal tensile testing machine, obviously shortens the detection period and reduces the detection cost.

Drawings

FIG. 1 is a schematic diagram of an explosion structure of a detection tool and a universal joint according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a tail ring fixing chuck according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a head ring fixing chuck according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a chuck shackle connector according to an embodiment of the invention;

FIG. 5 is a schematic perspective view of a bottom fixture according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a titanium alloy universal joint according to an embodiment of the present invention;

FIG. 7 is a view of a titanium alloy gimbal according to an embodiment of the present invention from the direction of the tail ring;

FIG. 8 is a schematic cross-sectional view of the portion A-A of FIG. 7;

FIG. 9 is a schematic diagram of an exploded structure of a head ring, a middle outer ring, and a tail ring according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a head ring casting formwork according to an embodiment of the present invention;

FIG. 11 is a schematic view of another perspective view of a head ring casting formwork according to an embodiment of the present invention;

FIG. 12 is a schematic perspective view of an intermediate outer ring casting formwork according to an embodiment of the present invention;

FIG. 13 is a schematic view of another perspective view of an intermediate outer ring casting formwork according to an embodiment of the present invention;

FIG. 14 is a schematic perspective view of a tail ring casting formwork according to an embodiment of the present invention;

FIG. 15 is a schematic view of another perspective view of a tail ring casting mold according to an embodiment of the present invention.

Reference numerals illustrate:

10. The tail ring fixes the chuck; 11. a clamping part; 12. a first connection portion; 13. a second positioning hole; 20. a head ring fixing chuck; 21. a second connecting portion; 22. an intermediate connecting rod; 23. a third connecting portion; 24. a first connection groove; 25. a second thread; 30. the chuck shackle connecting piece; 31. a fourth connecting portion; 32. a fifth connecting portion; 33. a first shackle connection hole; 34. a second connecting groove; 40. a first shackle; 50. a second shackle; 60. a bottom fixing member; 61. a connecting seat; 62. a connection hole; 63. a sixth connecting portion; 64. a second shackle connection hole; 70. a bottom auxiliary positioning member; 100. a head ring; 110. a head ring lug; 120. a head ring body; 121. a first thread; 200. an intermediate outer ring; 210. an intermediate outer ring lug; 220. an intermediate outer ring body; 300. a tail ring; 310. a tail ring lug; 320. a tail ring body; 321. a constriction; 322. a first positioning hole; 400. an intermediate ring; 500. a pin; 600. casting a mould shell by a first ring; 610. a first ring body cavity; 611. a first ring cavity middle section; 620. a head ring lug cavity; 630. a head ring lug runner; 640. a head ring body runner; 650. a first ring riser; 660. feeding a runner by a first loop riser; 700. an intermediate outer ring casting mould shell; 710. a middle outer ring body cavity; 711. a middle section of the middle outer ring cavity; 720. middle outer ring lug cavity; 730. middle outer ring lug runner; 740. an intermediate outer ring body runner; 750. a middle outer ring riser; 760. feeding a pouring gate through a riser of the middle outer ring; 800. casting a mould shell by a tail ring; 810. a tail ring body cavity; 811. the middle section of the tail ring cavity; 820. a tail ring lug cavity; 830. tail ring lug pouring gate; 840. a tail ring body runner; 850. a tail ring riser; 860. feeding a runner by a tail ring riser; 900. a main runner; 910. a first runner; 920. a second runner; 930. and a third branch runner.

Detailed Description

The present invention will be further described in detail with reference to the drawings and examples, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the described embodiments are some, but not all, embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

The invention provides a strength detection tool and a detection method for a titanium alloy universal joint for deep sea communication, and particularly relates to a strength detection tool and a detection method for a titanium alloy universal joint for deep sea communication.

Example 1

The embodiment provides a strength detection tool for a titanium alloy universal joint for deep sea communication, as shown in fig. 1-9, the detection tool is used for a longitudinal tensile testing machine, the universal joint comprises a head ring 100, a middle outer ring 200, a tail ring 300 and a middle ring 400, the head ring 100, the middle outer ring 200 and the tail ring 300 are respectively connected with the middle ring 400 through pins 500 to form the universal joint, and the detection tool comprises:

The tail ring fixing clamp head 10 is used for being fixedly connected with the tail ring 300 and can be clamped by the longitudinal tensile testing machine for tensile detection;

A head ring fixed collet 20, wherein a first end of the head ring fixed collet 20 is fixedly connected with the head ring 100, and a second end is connected with a first end of the collet shackle connector 30;

A collet shackle connector 30, a second end of the collet shackle connector 30 being provided with a first shackle 40;

a first shackle 40, wherein the first shackle 40 and the second shackle 50 are buckled;

a second shackle 50, a first end of the second shackle 50 being adapted to be engaged with the first shackle 40, the second shackle 50 being rotatable relative to the first shackle 40, a second end of the second shackle 50 being adapted to be connected with a bottom fixture 60;

The bottom fixing piece 60, the bottom fixing piece 60 is used for fixedly connecting with the base of the longitudinal tensile testing machine.

Through analysis, as the weight of a single universal joint is about twenty kilograms, the weight is larger, and the equipment precision is insufficient, friction or gaps exist between the universal joint and a clamp, so that the torque can be inevitably introduced during detection, the torque introduced by each universal joint is different, the detection results are greatly different, and the strength of the titanium alloy universal joint for deep sea communication cannot be accurately detected at present. In this embodiment, the developer of the present application designs a set of detection tools for the longitudinal stretching of the universal joint, and through the arrangement of the first shackle 40 and the second shackle 50 which are mutually buckled in the detection tools, the flexible connection between the detection tools and the universal joint is realized, and the first shackle 40 and the second shackle 50 can rotate relatively, so that the influence of the tools on the detection can be effectively eliminated during the detection, the moment introduced during the detection is avoided, and the detection accuracy is remarkably improved. The detection tool provided by the embodiment is used for carrying out three batches of detection, the average value of the detection results of the three batches is 560KN, the positive and negative errors of the detection results of each batch are 5KN, the foreign detection results are 562KN, and the errors of the detection results of the three batches are 0.36%, so that the integral strength of the universal joint detected by the detection tool provided by the embodiment is very similar to the foreign detection results, and the integral strength of the titanium alloy universal joint for deep sea communication can be accurately detected.

As an alternative embodiment, as shown in fig. 2 and 9, the tail ring 300 includes a tail ring body 320 and a tail ring lug 310, a shrinkage portion 321 is disposed on a side of the tail ring body 320 away from the tail ring lug 310, a plurality of first positioning holes 322 are disposed on an outer periphery of the shrinkage portion 321, the tail ring fixing chuck 10 includes a clamping portion 11 and a first connecting portion 12, the clamping portion 11 is used for clamping and loading and stretching of the longitudinal tensile testing machine, the first connecting portion 12 can extend into a central hole of the shrinkage portion 321, a plurality of second positioning holes 13 are disposed on an outer periphery of the first connecting portion 12, the second positioning holes 13 are disposed corresponding to the first positioning holes 322, and positioning pins (not shown in the drawing) penetrate through the first positioning holes 322 to enter the second positioning holes 13 for fixedly connecting the tail ring 300 with the tail ring fixing chuck 10. The structure is simple and easy to assemble, the first connecting part 12 stretches into the central hole of the shrinkage part 321, the quick positioning of the first connecting part and the shrinkage part is realized, and the first connecting part and the shrinkage part can be quickly connected through the positioning pin.

In this embodiment, as shown in fig. 3 and 9, the head ring 100 includes a head ring body 120 and a head ring lug 110, a first thread 121 is disposed on a side of the head ring body 120 away from the head ring lug 110, the head ring fixing chuck 20 includes a second connection portion 21 and a third connection portion 23, the second connection portion 21 is connected with the third connection portion 23 through an intermediate connection rod 22, the second connection portion 21 is fixedly connected with the head ring 100, the third connection portion 23 is fixedly connected with the chuck shackle connector 30, a first connection groove 24 is disposed on the second connection portion 21, a second thread 25 is disposed on an inner sidewall of the first connection groove 24, and the second thread 25 is cooperatively connected with the first thread 121, so as to realize a fixed connection between the head ring 100 and the head ring fixing chuck 20. The first connecting groove 24 and the second threads 25 on the inner side wall thereof enable the first connecting groove to be installed in a matched mode with the current structure of the head ring 100, and therefore the head ring 100 and the head ring fixing chuck 20 are fixedly connected.

As an embodiment of the present invention, as shown in fig. 4, the chuck shackle connector 30 includes a fourth connecting portion 31 and a fifth connecting portion 32, the fourth connecting portion 31 is configured to be fixedly connected with the third connecting portion 23, the fifth connecting portion 32 is configured to be connected with the first shackle 40, a second connecting groove 34 is disposed on the fourth connecting portion 31, a fourth thread (not shown in the drawing) is disposed on an inner sidewall of the second connecting groove 34, a third thread (not shown in the drawing) is disposed on the third connecting portion 23, the third thread is cooperatively connected with the fourth thread, and a first shackle connecting hole 33 is disposed on the fifth connecting portion 32, and the first shackle connecting hole 33 is configured to be connected with the first shackle 40. The first shackle 40 is disposed on the first shackle connecting member 30 by passing a pin of the first shackle 40 through the first shackle connecting hole 33, and the first shackle 40 is disposed on the first shackle connecting member 30.

As one preferred embodiment, the first shackle connecting hole 33 is in clearance fit with the pin of the first shackle 40. Through the arrangement of the first shackle connecting hole 33 and the pin clearance fit of the first shackle 40, the first shackle 40 can rotate to a certain extent when torque is introduced in a tensile test, so that the influence of the tool on the tensile test is effectively eliminated, and the accuracy of a detection result is ensured.

In this embodiment, as shown in fig. 5, the bottom fixing member 60 includes a connection seat 61 and a sixth connection portion 63, the connection seat 61 is fixedly connected with the base of the longitudinal tensile testing machine, and the sixth connection portion 63 is provided with a second shackle connection hole 64, and the second shackle connection hole 64 is used for connecting with the second shackle 50. In this embodiment, the pin of the second shackle 50 passes through the second shackle connecting hole 64, and the U-shaped shackle of the second shackle 50 and the U-shaped shackle of the first shackle 40 are mutually buckled. Through the above-mentioned setting, realized the fixed of detection frock lower extreme on the one hand, on the other hand because the setting of first shackle 40 and the cooperation of second shackle 50 are connected for need not the cooperation size in the tight control altitude direction in universal joint and the detection frock assembly process, the quick assembly of universal joint and detection frock of being convenient for. The connecting base 61 is provided with a plurality of connecting holes 62, and the bottom fixing member 60 is fixedly arranged on the base of the longitudinal tensile testing machine through the connecting holes 62 by bolts.

As one preferred embodiment, the second shackle connecting hole 64 is in clearance fit with the pin of the second shackle 50. Through the arrangement of the second shackle connecting hole 64 and the pin clearance fit of the second shackle 50, the second shackle 50 can rotate to a certain extent when torque is introduced in a tensile test, so that the influence of the tool on the tensile test is effectively eliminated, and the accuracy of a detection result is ensured.

In some optional embodiments, the detection tool further includes a bottom auxiliary positioning member 70, where one end of the bottom auxiliary positioning member 70 is fixedly connected to the base of the longitudinal tensile testing machine, and the other end is fixedly connected to the bottom fixing member 60. The bottom auxiliary positioning member 70 is configured to provide a relatively flat surface to assist in fixedly arranging the bottom fixing member 60, so as to ensure connection stability of the bottom fixing member 60, so as to avoid influencing the detection result.

Wherein, the tail ring fixing chuck 10 is formed by adopting a TC4 titanium alloy forging piece. The strength of the TC4 titanium alloy forging is far higher than the integral strength of the universal joint, so that the stability of a universal joint sample in stretching can be ensured, the deformation and displacement of the sample are reduced, and the reliability of detection is improved. In addition, in the use process of the universal joint for deep sea communication, the corresponding connection part of the tail ring 300 is formed by processing a TC4 titanium alloy forging, and in the embodiment, the tail ring fixing clamp 10 is limited by the material of the tail ring fixing clamp, so that the tail ring fixing clamp is closer to the actual use scene, and the detection precision is improved.

The head ring fixing clip 20, the clip shackle connector 30, the bottom fixing member 60 and the bottom auxiliary positioning member 70 are formed by machining 40Cr steel.

Wherein the first shackle 40 and the second shackle 50 are high strength shackles, such as a high strength shackle G2150 of 85T, etc. Because the high-strength shackle has higher strength and rigidity, the stability of the sample in the stretching process can be ensured, the deformation and displacement of the sample are reduced, meanwhile, the flexible connection mode can better cope with the deformation of the sample after the torque is introduced, and the distortion of the evaluation result caused by the deformation of the sample is avoided, so that the reliability of the detection result can be improved by adopting the longitudinal stretching scheme of the high-strength shackle to realize flexible connection.

The longitudinal tensile testing machine is a high-precision longitudinal tensile testing machine, such as a MTS311S-2500KN electrohydraulic servo material testing machine, and the like, the equipment can realize accurate loading of tensile force, and the control precision can reach +/-0.3 KN, so that parameters such as stress and strain of a sample can be accurately detected, and the reliability of a detection result is ensured.

Optionally, the head ring 100, the middle outer ring 200, and the tail ring 300 are structural members, and the structural members are produced by casting, and the casting method includes:

Step S1: preparing a wax mould shell by using titanium alloy yttrium oxide coating as a surface layer, wherein the shell thickness is 8-12mm;

Step S2: placing the mould shell in a heating furnace, and preserving heat for 5-7h after the furnace temperature is raised to 1000-1100 ℃;

Step S3: smelting titanium alloy by adopting a vacuum consumable condensation furnace, pouring the die shell, introducing argon with preset pressure after the pouring is completed for 25-35 s, cooling for 25-35 min, and discharging;

step S4: cleaning the shell of the casting piece, cutting, grinding the pouring channel and repairing the appearance to obtain a structural piece casting;

step S5: performing flaw detection on the structural member casting obtained in the step S4;

step S6: performing heat treatment on the structural part casting qualified in the flaw detection in the step S5;

The formwork prepared in step S1 includes a first ring casting formwork 600 and/or an intermediate outer ring casting formwork 700 and/or a tail ring casting formwork 800, riser and runner are arranged on the first ring casting formwork 600 and/or the intermediate outer ring casting formwork 700 and/or the tail ring casting formwork 800, and riser feeding runners are arranged between the riser and runner respectively.

In the prior art, the structural member is generally produced in a forging and machining mode so as to ensure that the structural member can meet the requirements of the use environment of the universal joint, and the production process is complex and the production cost is high. In the production process, some researchers try to produce the structural member of the titanium alloy universal joint for deep sea communication by using a casting method, but due to a plurality of defects generated in the casting process, no effective technical means is provided for overcoming the defects, so that those skilled in the art consider that the structural member of the universal joint for deep sea optical communication cannot be produced by using the casting method, the defects of the structural member during casting are mainly shrinkage cavities, the formation positions of the structural member are usually close to the positions where the body of the structural member such as the head ring 100, the middle outer ring 200, the tail ring 300 and the like is connected with lugs, and the positions are also usually key parts of stress of the structural member, and the structural member of the universal joint produced by using the casting method cannot always meet the use requirements of deep sea communication due to the defects. In the embodiment, a riser feeding runner is arranged between a riser and a runner, the riser feeding runner is used for conveying molten metal into a pouring mould shell through the riser synchronously in the casting pouring production process, in this case, the solidification speed of the molten metal near the riser is delayed, the formation position of shrinkage cavity defects is accidentally transferred into the riser from the connection position of a body and a lug integrally, the riser needs to be removed in the subsequent machining process, and the mechanical property of a structural component is not adversely affected, so that the titanium alloy universal joint structural component can be produced in a casting mode, the universal joint structural component is directly produced through the casting, the forging links in the casting are saved, part of machining links are also saved, the production process is simplified compared with the prior art, and the production cost is reduced. The titanium alloy yttrium oxide coating is a material in the prior art, and the vacuum self-consumption skull furnace can be a 150KG furnace type, and is not limited herein. Preferably, the thickness of the shuttering in the step S1 is 10mm; in the step S2, the furnace temperature is raised to 1000 ℃ and then the heat is preserved for 6 hours; and step S3, introducing argon with preset pressure after casting for 30S, cooling for 30min, and discharging.

Wherein, each component mass percent in the structure casting is: al: 6.2-6.6%, V: 4.0-4.3%, O: 0.18-0.20%, Y: 0.15-0.20%, C not more than 0.10%, N not more than 0.05%, H not more than 0.015%, fe not more than 0.40% and the balance Ti. The limit tension which the titanium alloy universal joint needs to meet is 550KN, and the limit tension is kept for more than 10 minutes, so that the mechanical properties of the titanium alloy universal joint structural member body material are required to meet the requirements of Table 1. In the prior art, besides the limitation of casting defects, the mechanical properties of the cast body of the titanium alloy universal joint produced by casting are not up to the standard, and the mechanical properties of the cast body are also one reason for limiting the overall strength of the titanium alloy universal joint. In the embodiment, through the accurate control of the alloy elements, the casting material suitable for the titanium alloy universal joint structural member is prepared, and when the alloy elements are in the range, the mechanical properties of the casting body produced by adopting the titanium alloy are shown in table 2, and it can be seen that the yield strength of the casting body provided by the embodiment can be higher than the standard 8%, and the elongation is higher than the standard 25%, so that the universal joint produced by adopting the titanium alloy casting meets the use requirement of the ultimate tensile force. In particular, research by the research personnel of the applicant shows that the content of O, Y has a great influence on the performance of the casting body, and tables 3 and 4 respectively provide alloy components of the titanium alloy when the O content is higher than 0.20 percent and the Y content is higher than 0.20 percent, and the mechanical properties of the corresponding casting, so that the plasticity of the casting body is greatly reduced when the O content is higher than 0.20 percent and the Y content is higher than 0.20 percent; tables 5 and 6 respectively provide the alloy components of the titanium alloy when the O content is lower than 0.18% and the Y content is lower than 0.15%, and the mechanical properties of the corresponding castings, and when the O content is lower than 0.18% and the Y content is lower than 0.15%, the strength of the casting body is greatly reduced, so that the mechanical properties of the finished universal joint product are seriously affected, and the use requirements of the finished universal joint product cannot be met. Research by the applicant's research personnel found that: in the as-cast titanium alloy, as Y is a surface active element, the solid-liquid interfacial tension can be reduced, so that nucleation work is reduced, the nucleation quantity is improved, the melting point of oxide formed by combining Y and O is higher, the oxide formed by combining Y and O can become nucleation points in the casting process, the nucleation quantity is improved, in addition, the oxide formed by combining Y and O is generated at high temperature and is earlier than beta phase formation, beta grain boundaries can be pinned, the growth of grains of the titanium alloy is prevented, and through the effects, the grains of the titanium alloy produced by casting are fine, and the overall strength and plasticity of the titanium alloy are remarkably improved. When the content of Y and O is too low, the quantity of the oxides of Y is insufficient, the grain refining effect is poor, the strength of the casting body is poor, and when the content of Y and O is too high, the oxides of Y are enriched in a linear form at the part of the casting, and the plasticity of the casting body is reduced. The titanium alloy component has uniqueness, fineness and strictness, can realize the matching of the optimal tensile strength and plasticity of the titanium alloy universal joint structural member, improves the overall performance and service life of the titanium alloy structural member, and reduces the production cost, thereby effectively promoting the development and application of an ocean optical communication network.

TABLE 1 mechanical property Standard of Universal Joint Material for deep sea communication at Room temperature

Table 2 mechanical properties of castings provided in example 1 at room temperature (after heat treatment)

TABLE 3 alloy compositions for castings with higher O, Y levels

Table 4 mechanical Properties of the castings in Table 3 at room temperature (after heat treatment)

Therefore, when the O, Y element content is higher, the tensile strength and the yield strength in the mechanical property of the casting body are obviously improved, but the plasticity is less than 5 percent, the area shrinkage is less than 12 percent, and the use requirement of the titanium alloy universal joint for deep sea communication cannot be met.

TABLE 5 alloy compositions for castings with low O, Y levels

Table 6 mechanical Properties of the castings in Table 5 at room temperature (after heat treatment)

Therefore, when the O, Y element content is low, the elongation and the area shrinkage in the mechanical property of the casting body are obviously improved, but the tensile strength and the yield strength are obviously reduced, so that the use requirement of the titanium alloy universal joint for deep sea communication cannot be met.

As one of the alternative embodiments, the smelting process in step S3 is: and (3) starting an arc by 0-2000A, adjusting to 5000-7000A after starting the arc, and adjusting to 25000A or more until smelting is finished.

As one of the alternative embodiments, the preset pressure in step S3 is 0.04-0.06MPa. Through the input of argon gas after the pouring is accomplished, can improve the cooling efficiency of foundry goods to improve its production efficiency. Preferably, the preset pressure is 0.05MPa.

Specifically, in step S3, the structural member is poured through the main runner 900, and a plurality of first sub-runners 910 and/or a plurality of second sub-runners 920 and/or a plurality of third sub-runners 930 are disposed in the circumferential direction of the main runner 900, where each first sub-runner 910 is connected to one first ring pouring formwork 600, each second sub-runner 920 is connected to one middle outer ring pouring formwork 700, and each third sub-runner 930 is connected to one tail ring pouring formwork 800. Through the arrangement, a plurality of structural parts can be synchronously cast and molded in one casting process, so that casting efficiency is remarkably improved, and production efficiency of products is improved. In one embodiment, 8 sub-runners are arranged along the circumferential direction of the main runner 900, the 8 sub-runners can be any one or a combination of a plurality of first sub-runners 910, second sub-runners 920 and third sub-runners 930, through the arrangement, 8 titanium alloy universal joint structural members for deep sea communication can be cast and molded at one time, the production efficiency of products is obviously improved, and the production cost is reduced.

It should be noted that, in the circumferential direction of one main runner 900, there may be simultaneously provided a first ring casting mold shell 600, an intermediate outer ring casting mold shell 700 and a tail ring casting mold shell 800, and at this time, the direction coordinate systems corresponding to the above 3 casting mold shells are different, so as to facilitate description of the respective structures, in this embodiment, coordinate systems corresponding to the first ring casting mold shell 600, the intermediate outer ring casting mold shell 700 and the tail ring casting mold shell 800 are provided respectively, as shown in fig. 10, and an upper 1, a lower 1, a left 1, a right 1, a front 1 and a rear 1 in the coordinate systems are used to indicate directions corresponding to when the first ring casting mold shell 600 is connected with the main runner 900; as shown in fig. 13, the upper 2, lower 2, left 2, right 2, front 2, and rear 2 in the coordinate system are used to represent the directions corresponding to the connection of the intermediate outer ring casting mold shell 700 with the main runner 900; as shown in fig. 15, the upper 3, lower 3, left 3, right 3, front 3, and back 3 in the coordinate system are used to represent the directions corresponding to the connection of the tail ring casting mold 800 with the main runner 900.

As shown in fig. 10 and 11, the head ring casting mold shell 600 includes two head ring body cavities 610 and two head ring lug cavities 620, the two head ring lug cavities 620 are simultaneously disposed on the left 1 side or the right 1 side of the head ring body cavity 610, the two head ring lug cavities 620 are disposed on the same horizontal height, the head ring casting mold shell 600 is provided with a head ring lug runner 630 and a head ring body runner 640, one end of the head ring lug runner 630 is connected with the head ring lug cavity 620, the other end is connected with a first branch runner 910, one end of the head ring body runner 640 is connected with the head ring body cavity 610, the other end is connected with the first branch runner 910, the upstream end of the first branch runner 910 is connected with the main runner 900, the head ring body runner 640 is disposed on one side far away from the head ring lug cavity 620, the head ring body runner 640 has more than one head ring riser 650 is disposed on the top of the head ring casting mold shell 600, and the head ring riser 650 is disposed at the center of the outer circumference of the head ring middle section 611. The first ring cavity middle section 611 refers to a circular arc section cavity on the first ring body cavity 610 for connecting two first ring lug cavities 620, it should be understood that there are two first ring cavity middle sections 611 disposed on two sides of the upper 1 and the lower 1, and the first ring riser 650 is disposed at a middle position of the first ring cavity middle section 611 located on the upper 1 side. It should be noted that, the first ring casting cavity is formed inside the first ring casting mold shell 600, and the first ring casting cavity includes a first ring body cavity 610 and a first ring lug cavity 620 that are mutually communicated, and the molten metal enters the first ring casting cavity through a first ring lug runner 630 and a first ring body runner 640 to form the first ring 100. In the prior art, shrinkage cavity defects of the casting of the head ring 100 are usually located at the connection part of the head ring lug 110 and the head ring body 120, the head ring lug runner 630 and the head ring body runner 640 are respectively arranged at the left side 1 and the right side 1 of the head ring body cavity 610, so that quick mold filling of the head ring pouring cavity can be realized, internal defects are concentrated at the position close to the head ring riser 650, the defects of the casting are effectively reduced, and shrinkage cavities generated during casting can be integrally transferred into the head ring riser 650 through the arrangement of the riser feeding runner between the head ring riser 650 and the runner, therefore, the shrinkage cavity defects formed in the casting body can be effectively avoided through the arrangement of the pouring system, the casting quality is remarkably improved, and the structural strength of the casting is ensured.

As an alternative embodiment, as shown in fig. 10 and 11, a head-loop riser feeding runner 660 is provided on the head-loop riser 650, and one end of the head-loop riser feeding runner 660 is connected to the head-loop riser 650, and the other end is connected to the head-loop body runner 640 or the first branch runner 910. Through the arrangement, shrinkage cavity defects generated during casting can be integrally transferred into the first-ring riser 650, so that the performance of the casting body is not affected, and the structural strength of the casting is ensured.

In this embodiment, as shown in fig. 10 and 11, two head ring lug runners 630 are provided, two head ring lug runners 630 are respectively connected to one head ring lug cavity 620, four head ring body runners 640 are provided, and four head ring body runners 640 are respectively connected to positions on the head ring body cavity 610 near the upper 1 side, the lower 1 side, the front 1 side and the rear 1 side. Through the cooperation setting of many watering, can show the filling ability that improves the die cavity, defect when reducing the casting improves the mechanical properties of foundry goods. Preferably, one end of the head ring riser feeding runner 660 is connected to the head ring riser 650, and the other end is connected to the head ring body runner 640 near the upper 1 side of the head ring body cavity 610.

In this embodiment, as shown in fig. 12 and 13, the intermediate outer ring casting mold shell 700 includes an intermediate outer ring body cavity 710 and an intermediate outer ring lug cavity 720, four intermediate outer ring lug cavities 720 are disposed on the left 2 side and the right 2 side of the intermediate outer ring body cavity 710, two intermediate outer ring lug cavities 720 are disposed on the same horizontal level, an intermediate outer ring lug runner 730 and an intermediate outer ring body runner 740 are disposed on the intermediate outer ring casting mold shell 700, one end of the intermediate outer ring lug runner 730 is connected with the intermediate outer ring lug cavity 720, the other end is connected with the second split runner 920, the upstream end of the second split runner 920 is connected with the main runner 900, one end of the intermediate outer ring body runner 740 is connected with the intermediate outer ring body cavity 710, the other end is connected with the second split runner 920, the intermediate outer ring body runner 740 is disposed on the left 2 side or the right 2 side of the intermediate outer ring body cavity 710, one or more intermediate outer ring body runners 740 are disposed on the intermediate outer ring casting mold shell 700, two outer ring runners 750 are disposed symmetrically on the intermediate outer ring 750, and two intermediate outer ring 2 outer ring segments are disposed on the intermediate outer ring 750 and have a certain vertical included angle between them, and the intermediate outer ring 750 is formed on the outer ring 2. The middle outer ring cavity middle section 711 refers to a circular arc section cavity on the middle outer ring body cavity 710 for connecting two middle outer ring lug cavities 720 on the same side, it should be understood that there are two middle outer ring cavity middle sections 711, which are arranged on two sides of the upper 2 and the lower 2, and the middle outer ring riser 750 is arranged on the middle outer ring cavity middle section 711 on the upper 2 side. It should be noted that, the middle outer ring casting mold 700 forms a middle outer ring casting cavity inside, the middle outer ring casting cavity includes a middle outer ring body cavity 710 and a middle outer ring lug cavity 720 that are mutually communicated, and molten metal enters the middle outer ring casting cavity through the middle outer ring lug runner 730 and the middle outer ring body runner 740 to form the middle outer ring 200. In the prior art, shrinkage cavity defects of the middle outer ring 200 casting are usually located at the connection position between the middle outer ring lug 210 and the middle outer ring body 220, in this embodiment, the middle outer ring lug runner 730 and the middle outer ring body runner 740 are arranged on the side surface of the middle outer ring body cavity 710, so that quick filling of the middle outer ring pouring cavity can be realized, as the middle outer ring lug 210 on the middle outer ring 200 is more, the middle outer ring riser 750 and the vertical are arranged at a certain angle, so that internal defects are conveniently concentrated at a position close to the middle outer ring riser 750, defects of the casting are effectively reduced, and shrinkage cavities generated during casting can be integrally transferred into the middle outer ring riser 750 through the arrangement of riser feeding runner between the middle outer ring riser 750 and the runner, so that the arrangement of the pouring system can effectively avoid the shrinkage cavity defects formed in the casting body, remarkably improve the casting quality and ensure the structural strength of the casting. Wherein the included angle is 30-60 degrees, preferably 45 degrees.

As an alternative embodiment, as shown in fig. 12 and 13, an intermediate outer ring riser feeding runner 760 is provided on the intermediate outer ring riser 750, and there are two intermediate outer ring riser feeding runners 760, and one end of each intermediate outer ring riser feeding runner 760 is connected to one intermediate outer ring riser 750, and the other end is connected to the intermediate outer ring body runner 740 or the second branch runner 920, respectively. Through the arrangement, shrinkage cavity defects generated during casting can be integrally transferred into the middle outer ring riser 750, so that the performance of a casting body is not affected, and the structural strength of the casting body is ensured.

In this embodiment, as shown in fig. 12 and 13, four middle outer ring lug runners 730 are provided, four middle outer ring lug runners 730 are respectively connected to one middle outer ring lug cavity 720, four middle outer ring body runners 740 are respectively connected to the middle outer ring body cavity 710, and four middle outer ring body runners 740 are arranged in an "x" shape. Through the cooperation setting of many watering, can show the filling ability that improves the die cavity, defect when reducing the casting improves the mechanical properties of foundry goods. Preferably, one end of each of the intermediate outer ring riser feeder 760 is connected to one intermediate outer ring riser 750, and the other end is connected to one intermediate outer ring body runner 740 adjacent to the upper 2 side of the intermediate outer ring body cavity 710.

In this embodiment, as shown in fig. 14 and 15, the tail ring casting mold shell 800 includes two tail ring body cavities 810 and two tail ring lug cavities 820, the two tail ring lug cavities 820 are simultaneously disposed on the left 3 side or the right 3 side of the tail ring body cavity 810, the two tail ring lug cavities 820 are disposed on the same horizontal level, the tail ring casting mold shell 800 is provided with a tail ring lug runner 830 and a tail ring body runner 840, one end of the tail ring lug runner 830 is connected with the tail ring lug cavity 820, the other end is connected with a third branch runner 930, the upstream end of the third branch runner 930 is connected with the main runner 900, one end of the tail ring body runner 840 is connected with the tail ring body cavity 810, the other end is connected with the third branch runner 930, the tail ring body runner 840 is disposed on the same side of the tail ring lug cavity 820, the tail ring body 840 is disposed on more than one, the top end of the tail ring casting mold shell 800 is provided with a tail ring riser 850, and the top end of the tail ring casting mold shell 800 is disposed at the center riser is disposed at the center of the peripheral section 811. The middle section 811 of the tail ring cavity refers to a circular arc section cavity on the tail ring body cavity 810 for connecting two tail ring lug cavities 820, it should be understood that there are two middle sections 811 of the tail ring cavity, which are disposed on two sides of the upper 3 and the lower 3, and the tail ring riser 850 is disposed at a middle position of the middle section 811 of the tail ring cavity located on the upper 3 sides. It should be noted that, the tail ring casting cavity is formed inside the tail ring casting mold shell 800, and includes a tail ring body cavity 810 and a tail ring lug cavity 820 which are mutually communicated, and the molten metal enters the tail ring casting cavity through the tail ring lug runner 830 and the tail ring body runner 840 to form the tail ring 300. In the prior art, the shrinkage cavity defect of the casting of the tail ring 300 is usually located at the connection position between the tail ring lug 310 and the tail ring body 320, in this embodiment, the tail ring lug runner 830 and the tail ring body runner 840 are synchronously arranged at the left 3 side or the right 3 side of the cavity 810 of the tail ring body, so that the rapid filling of the casting cavity of the tail ring can be realized, the internal defect is concentrated at the position close to the riser 850 of the tail ring, the defect of the casting is effectively reduced, and the shrinkage cavity generated during casting can be integrally transferred into the riser 850 of the tail ring through the arrangement of the riser feeding runner between the riser 850 of the tail ring and the runner.

As an alternative embodiment, as shown in fig. 14 and 15, a tail ring riser feeding runner 860 is provided on the tail ring riser 850, and one end of the tail ring riser feeding runner 860 is connected to the tail ring riser 850, and the other end is connected to the third branch runner 930. Through the arrangement, shrinkage cavity defects generated during casting can be integrally transferred into the tail ring riser 850, so that the performance of a casting body is not affected, and the structural strength of the casting body is ensured.

In this embodiment, as shown in fig. 14 and 15, two tail ring lug runners 830 are provided, two tail ring lug runners 830 are respectively connected with one tail ring lug cavity 820, four tail ring body runners 840 are provided, four tail ring body runners 840 are respectively connected with the tail ring body cavity 810, and four tail ring body runners 840 are arranged in an "x" shape. Through the cooperation setting of many watering, can show the filling ability that improves the die cavity, defect when reducing the casting improves the mechanical properties of foundry goods.

As an alternative embodiment, the remaining height of the sprue is 1.0mm or less in step S4. The setting can obviously reduce the workload in the subsequent appearance treatment, and improves the production efficiency of products.

As an embodiment of the present invention, the flaw detection in step S5 employs X-ray flaw detection. The X-ray flaw detection can carry out nondestructive detection on the castings, can effectively detect defects such as air holes, inclusions, cracks and the like in the castings, and is beneficial to ensuring the quality and reliability of the castings.

Optionally, step S6 includes:

Step S61: heating the structural member casting to 500 ℃ by adopting a vacuum solid solution furnace, and preserving heat for 1.5h;

Step S62: heating the structural member casting to 850+/-10 ℃, and preserving heat for 1h;

Step S63: and after the heat preservation is finished, closing the vacuum solution furnace, and filling argon of 1.05Bar into the vacuum solution furnace to cool the structural member casting along with the furnace.

In the embodiment, the casting is insulated at 500 ℃ to eliminate the residual stress in the casting, avoid deformation or cracking caused by internal stress concentration in subsequent treatment, and eliminate element segregation phenomenon in the casting process in 500 ℃ to promote the diffusion of alloy elements in crystal lattices so that the components of the titanium alloy are more uniform, in this case, when the casting is insulated at 850+/-10 ℃, the alloy elements are helped to be dissolved into the Ti matrix again uniformly, so that finer precipitates are formed in the subsequent cooling process to improve the strength of the structural member, and the use requirement of the universal joint is met. In addition, after the heat preservation is finished, argon of 1.05Bar is filled into the vacuum solid solution furnace, and the structural part is cooled along with the furnace, so that the temperature reduction rate of the structural part is low, the heat stress in the structural part is released, the internal stress generated by the temperature gradient is reduced, the micro-cracks generated by rapid cooling can be avoided, the surface oxidation or nitridation of the structural part can be avoided, the surface quality of the structural part is ensured, and in addition, the alloy elements in the titanium alloy can be fully diffused to form a homogeneous solid solution along with the furnace cooling, so that the mechanical property of the structural part is effectively improved.

Further, the step S6 further includes:

Step S64: when the furnace temperature is lower than 200 ℃, opening the furnace door to deflate and cool;

Step S65: discharging when the furnace temperature is lower than 40 ℃.

Through the arrangement, the time period of heat treatment can be reduced under the condition of ensuring the performance of the structural member, and the production efficiency of the structural member is improved. When the furnace temperature is reduced to below 200 ℃, the thermal stress in the material is effectively released in the previous slow cooling, the phase change of the material is completed, and the continuous cooling does not cause adverse structural change.

It should be noted that, the intermediate ring 400 is produced by forging and machining, and reference may be made to the prior art specifically, and details thereof will not be described herein.

Example 2

The embodiment provides a strength detection method of a titanium alloy universal joint for deep sea communication, which is used for the detection tool described in embodiment 1, and the detection method comprises the following steps:

Step S300: collecting stress, strain and other data of a universal joint sample in the tensile test process, and processing and analyzing the collected data after the test is finished to obtain key strength parameters such as tensile strength, elongation and the like;

Step S400: and (5) ending the detection.

In this embodiment, due to the arrangement of the first shackle 40 and the second shackle 50 in the detection tool, the requirement of the assembly precision of the detection tool and the universal joint on the longitudinal tensile testing machine is obviously reduced, the assembly speed of the tested sample is improved, and in addition, due to the fact that the first shackle 40 and the second shackle 50 are buckled with each other, the first shackle 40 and the second shackle 50 can rotate relatively in the tensile detection process, the risk of introducing torque during detection is further reduced, and the detection reliability is improved. Optionally, the first preset loading rate is 10±0.3kn/min, the first preset load is 550KN, and the first preset time is 10min. In step S300, the method of collecting data such as stress and strain of the tensile test sample of the universal joint during the tensile test, and processing and analyzing the collected data after the test is completed to obtain data such as tensile strength or elongation is not limited herein. From the detection results of multiple times, the influence of different loading rates on the detection result of the integral strength of the universal joint is larger, and particularly, when the loading rate is too fast, the detection result is overall higher, so that the evaluation of researchers on the integral quality of the universal joint is influenced.

Wherein, step S100 includes:

step S110: placing the tail ring fixing chuck 10 on a universal joint, and fixedly connecting the tail ring fixing chuck 10 with a tail ring 300 of the universal joint;

step S120: fixedly connecting the head ring fixing clip 20 with the head ring 100 of the universal joint;

step S130: arranging universal joints connected with the tail ring fixing clamp 10 and the head ring fixing clamp 20 on a base of a longitudinal tensile testing machine, and controlling the longitudinal tensile testing machine to clamp the tail ring fixing clamp 10;

step S140: the longitudinal tensile testing machine drives the universal joint to ascend, and a chuck shackle connector 30 is arranged on the head ring fixed chuck 20;

step S150: a first shackle 40 is provided on the collet shackle connection 30;

Step S160: hanging the second shackle 50 on the first shackle 40;

Step S170: fixedly arranging the bottom fixing piece 60 on a base of the longitudinal tensile testing machine;

Step S180: the longitudinal tensile testing machine is controlled to drive the universal joint to descend so that the second shackle 50 is in matched connection with the bottom fixing member 60.

Through the above-mentioned setting, because the lock setting of first shackle 40 and second shackle 50 for possess certain installation height margin between the two, vertical tensile testing machine drives the high cooperation assembly that need not of universal joint decline, can easily realize universal joint and detection frock, is showing the clamping speed that has improved the universal joint sample, in addition, the cooperation setting of two shackles can also eliminate the moment of torsion that the frock introduced in tensile in-process, is showing the reliability that has improved the testing result. It should be noted that, the weight of a universal joint is about 20KG, when it is connected with the tail ring fixing chuck 10 and the head ring fixing chuck 20, the weight is close to 40KG, and at this time, the assembly of other parts will result in too heavy combination of the fixture and the sample, which is unfavorable for the subsequent clamping, at this time, the subsequent fixture installation can be performed by means of the longitudinal tensile testing machine, thereby improving the installation efficiency of the sample and the detection fixture.

Through the tensile test, research and development personnel can be helped to establish a corresponding universal joint evaluation system, weak links in the universal joint and places needing improvement are found, corresponding improvement is carried out pertinently, subsequent optimization design and verification are facilitated, and the design and verification cost of the universal joint is remarkably reduced.

It is to be noted that all terms used for directional and positional indication in the present invention, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "low", "tail", "head", "center", etc. are merely used to explain the relative positional relationship, connection, etc. between the components in a particular state, and are merely for convenience of description of the present invention, and do not require that the present invention must be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims

1. The utility model provides a intensity detection frock of titanium alloy universal joint for deep sea communication, its characterized in that, detect the frock and be used for vertical tensile testing machine, the universal joint includes first ring (100), middle outer loop (200), tail ring (300) and middle ring (400), first ring (100), middle outer loop (200), tail ring (300) respectively with middle ring (400) are connected in order to form the universal joint, detect the frock and include:

the tail ring fixing clamp head (10) is used for being fixedly connected with the tail ring (300) and can be clamped by the longitudinal tensile testing machine for tensile detection;

The first end of the head ring fixed chuck (20) is fixedly connected with the head ring (100), and the second end of the head ring fixed chuck (20) is connected with the first end of the chuck shackle connecting piece (30);

a collet shackle connection (30), a second end of the collet shackle connection (30) being provided with a first shackle (40);

the first shackle (40) is buckled with the second shackle (50);

The first end of the second shackle (50) is used for being buckled with the first shackle (40), the second shackle (50) and the first shackle (40) can rotate relatively, the risk of introducing torque during detection is reduced, and the second end of the second shackle (50) is used for being connected with the bottom fixing piece (60);

the bottom fixing piece (60), the bottom fixing piece (60) is used for fixedly connecting with the base of the longitudinal tensile testing machine;

the head ring (100), the middle outer ring (200) and the tail ring (300) are structural members, the structural members are produced by casting, and the casting method comprises the following steps:

The mould shell prepared in the step S1 comprises a first ring casting mould shell (600) and/or an intermediate outer ring casting mould shell (700) and/or a tail ring casting mould shell (800), riser and pouring channels are arranged on the first ring casting mould shell (600) and/or the intermediate outer ring casting mould shell (700) and/or the tail ring casting mould shell (800), and riser feeding pouring channels are arranged between the riser and the pouring channels; the riser feeding runner is used for synchronously conveying molten metal into the casting mould shell through the riser in the casting process; the structural member casting comprises the following components in percentage by mass: al: 6.2-6.6%, V: 4.0-4.3%, O: 0.18-0.20%, Y: 0.15-0.20%, C not more than 0.10%, N not more than 0.05%, H not more than 0.015%, fe not more than 0.40% and the balance Ti;

In step S3, pouring of the structural member is performed through a main runner (900), a plurality of first sub-runners (910) and/or a plurality of second sub-runners (920) and/or a plurality of third sub-runners (930) are arranged in the circumferential direction of the main runner (900), each first sub-runner (910) is connected with a first ring pouring formwork (600), each second sub-runner (920) is connected with an intermediate outer ring pouring formwork (700), and each third sub-runner (930) is connected with a tail ring pouring formwork (800);

The head ring pouring formwork (600) comprises two head ring body cavities (610) and two head ring lug cavities (620), the two head ring lug cavities (620) are simultaneously arranged on the left 1 side or the right 1 side of the head ring body cavities (610), the two head ring lug cavities (620) are arranged on the same horizontal height, the head ring pouring formwork (600) is provided with a head ring lug runner (630) and a head ring body runner (640), one end of the head ring lug runner (630) is connected with the head ring lug cavity (620), the other end of the head ring lug runner (640) is connected with a first branch runner (910), one end of the head ring body runner (640) is connected with the head ring body cavity (610), the other end of the head ring body runner (640) is connected with the first branch runner (910), the head ring body runner (640) is arranged on one side far away from the head ring lug cavity (620), the top end of the head ring pouring formwork (600) is provided with a head ring (650), and the head ring pouring formwork (650) is arranged at the center of the periphery of the riser (611);

The middle outer ring pouring formwork (700) comprises middle outer ring body cavities (710) and middle outer ring lug cavities (720), four middle outer ring lug cavities (720) are arranged on the left 2 side and the right 2 side of the middle outer ring body cavities (710) in a pairwise opposite mode, the middle outer ring lug cavities (720) of the four middle outer ring body cavities are arranged on the same horizontal height, the middle outer ring pouring formwork (700) is provided with a middle outer ring lug runner (730) and a middle outer ring body runner (740), one end of the middle outer ring lug runner (730) is connected with the middle outer ring lug cavity (720), the other end of the middle outer ring lug runner (730) is connected with a second sub-runner (920), one end of the middle outer ring body runner (740) is connected with the middle outer ring body cavity (710), the other end of the middle outer ring body runner (740) is connected with the second sub-runner (920), the middle outer ring body runner (740) is arranged on the left 2 side or the right 2 side of the middle outer ring body cavity (710), the middle outer ring body (740) is provided with more than one vertical riser, the middle outer ring body (750) is arranged on the middle outer ring (750) and a certain riser (750) is arranged on the middle outer ring (750), the vertical directions formed by the upper part 2 and the lower part 2 of the two middle outer ring risers (750) are symmetrically arranged in a symmetrical axis;

The tail ring casting mould shell (800) comprises a tail ring body cavity (810) and a tail ring lug cavity (820), the tail ring lug cavity (820) is two, the tail ring lug cavity (820) is arranged on the left 3 side or the right 3 side of the tail ring body cavity (810) at the same time, the tail ring lug cavity (820) is arranged on the same horizontal height, the tail ring casting mould shell (800) is provided with a tail ring lug runner (830) and a tail ring body runner (840), one end of the tail ring lug runner (830) is connected with the tail ring lug cavity (820), the other end of the tail ring lug runner (830) is connected with a third branch runner (930), one end of the tail ring body runner (840) is connected with the tail ring body cavity (810), the other end of the tail ring body runner (840) is connected with the third branch runner (930), the tail ring body runner (840) is arranged on the same side of the tail ring lug cavity (820), the tail ring body runner (850) is provided with more than one tail ring casting top end (800) is provided with a riser (811), and the central riser (811) is arranged at the periphery of the tail ring casting mould shell.

2. The strength detection tool for the deep sea communication titanium alloy universal joint according to claim 1, wherein the tail ring (300) comprises a tail ring body (320) and a tail ring lug (310), a shrinkage part (321) is arranged on one side, far away from the tail ring lug (310), of the tail ring body (320), a plurality of first positioning holes (322) are formed in the periphery of the shrinkage part (321), the tail ring fixing clamp head (10) comprises a clamping part (11) and a first connecting part (12), the clamping part (11) and the first connecting part (12) are connected with each other and used for achieving longitudinal stretching of the universal joint, the clamping part (11) is used for clamping loading stretching of a longitudinal tensile testing machine, the first connecting part (12) can extend into a central hole of the shrinkage part (321), a plurality of second positioning holes (13) are formed in the periphery of the first connecting part (12), the second positioning holes (13) are correspondingly formed in the first positioning holes (322), and positioning pins penetrate through the first positioning holes (322) and enter the second positioning holes (13) to be used for fixing the tail ring (300).

3. The strength detection tool for the deep sea communication titanium alloy universal joint according to claim 1, wherein the head ring (100) comprises a head ring body (120) and a head ring lug (110), a first thread (121) is arranged on one side, far away from the head ring lug (110), of the head ring body (120), the head ring fixing clamp (20) comprises a second connecting part (21) and a third connecting part (23), the second connecting part (21) is connected with the third connecting part (23) through an intermediate connecting rod (22), the second connecting part (21) is used for being fixedly connected with the head ring (100), the third connecting part (23) is used for being fixedly connected with the clamp shackle connecting piece (30), a first connecting groove (24) is arranged on the second connecting part (21), a second thread (25) is arranged on the inner side wall of the first connecting groove (24), and the second thread (25) is used for being matched and connected with the first thread (121) so as to realize the fixing connection of the head ring (100) and the head ring (20).

4. A strength detection tool for a titanium alloy universal joint for deep sea communication according to claim 3, wherein the chuck shackle connecting piece (30) comprises a fourth connecting portion (31) and a fifth connecting portion (32), the fourth connecting portion (31) and the fifth connecting portion (32) are mutually connected and are used for achieving longitudinal stretching of the universal joint, the fourth connecting portion (31) is used for being fixedly connected with a third connecting portion (23), the fifth connecting portion (32) is used for being connected with a first shackle (40), a second connecting groove (34) is formed in the fourth connecting portion (31), fourth threads are formed in the inner side wall of the second connecting groove (34), third threads are formed in the third connecting portion (23) and are connected with the fourth threads in a matched mode, a first shackle connecting hole (33) is formed in the fifth connecting portion (32), and the first shackle connecting hole (33) is used for being connected with the first shackle (40).

5. The strength detecting tool for a titanium alloy universal joint for deep sea communication according to claim 4, wherein the first shackle connecting hole (33) is in clearance fit with a pin of the first shackle (40).

6. The strength detection tool for the deep sea communication titanium alloy universal joint according to claim 1, wherein the bottom fixing piece (60) comprises a connecting seat (61) and a sixth connecting portion (63), the connecting seat (61) and the sixth connecting portion (63) are mutually connected and are used for achieving longitudinal stretching of the universal joint, the connecting seat (61) is fixedly connected with a base of the longitudinal tensile testing machine, a second shackle connecting hole (64) is formed in the sixth connecting portion (63), and the second shackle connecting hole (64) is used for being connected with a second shackle (50).

7. The strength detecting tool for a titanium alloy universal joint for deep sea communication according to claim 6, wherein the second shackle connecting hole (64) is in clearance fit with a pin of the second shackle (50).

8. The strength detection tool for the titanium alloy universal joint for deep sea communication according to claim 1, further comprising a bottom auxiliary positioning member (70), wherein one end of the bottom auxiliary positioning member (70) is fixedly connected with a base of the longitudinal tensile testing machine, and the other end of the bottom auxiliary positioning member is fixedly connected with a bottom fixing member (60).

9. A method for detecting strength of a titanium alloy universal joint for deep sea communication, which adopts the detection tool as claimed in any one of claims 1 to 8, and is characterized in that the detection method comprises the following steps:

Step S400: ending the detection;

Wherein the first preset loading rate is 10+/-0.3 KN/min.

10. The method of detecting as claimed in claim 9, wherein the step S100 includes:

step S110: placing the tail ring fixing chuck (10) on a universal joint, and fixedly connecting the tail ring fixing chuck (10) with a tail ring (300) of the universal joint;

step S120: fixedly connecting the head ring fixing chuck (20) with a head ring (100) of the universal joint;

Step S130: arranging universal joints connected with the tail ring fixing clamp head (10) and the head ring fixing clamp head (20) on a base of a longitudinal tensile testing machine, and controlling the longitudinal tensile testing machine to clamp the tail ring fixing clamp head (10);

step S140: the longitudinal tensile testing machine drives the universal joint to ascend, and a chuck shackle connecting piece (30) is arranged on the head ring fixed chuck (20);

step S150: a first shackle (40) is arranged on the chuck shackle connecting piece (30);

step S160: hanging a second shackle (50) on the first shackle (40);

Step S170: fixedly arranging a bottom fixing piece (60) on a base of the longitudinal tensile testing machine;

step S180: and controlling the longitudinal tensile testing machine to drive the universal joint to descend so that the second shackle (50) is matched and connected with the bottom fixing piece (60).