Thin-wall titanium alloy shell forming additive-equivalent manufacturing system and forming method

Abstract

The invention provides a thin-wall titanium alloy shell forming additive-equivalent manufacturing system and a thin-wall titanium alloy shell forming additive-equivalent manufacturing method, and belongs to the technical field of non-ferrous metal preparation. The thin-wall titanium alloy shell is prepared by alternately combining laser wire feeding and material adding with spinning forming on the basis of blank preparation, high-temperature spinning forming is carried out by utilizing heat generated in the laser wire feeding and material adding process, additional heating is not needed, and the method has the advantages of saving energy and reducing energy consumption; the prepared titanium alloy thin-wall shell has the advantages of being good in structural completeness, high in strength, large in forming caliber and the like, the forming method for preparing the large-caliber, high-temperature-resistant and thin-wall shell is feasible, and the problems that an existing thin-wall titanium alloy shell forming method is high in difficulty, poor in performance and high in equipment requirement are effectively solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of non-ferrous metal preparation, and particularly discloses a thin-wall titanium alloy shell forming and equal-material manufacturing system and a forming method. BACKGROUND

[0002] The thin-wall titanium alloy shell has performance advantages such as high-temperature resistance, corrosion resistance and high strength, and has a wide application in the fields of aerospace and underwater equipment. In the process of preparing a seamless thin-wall titanium alloy shell by using an extrusion or rolling forming method, the forming capacity of the equipment is required to be high, and the forming size is limited, so it is difficult to prepare a large-diameter thin-wall seamless titanium alloy shell. In the method of manufacturing by welding and splicing after coiling a plate, the titanium alloy is easy to oxidize in the welding process, and residual stress and deformation are easy to occur at the weld, which affects the forming precision of the shell, and the shell usually needs to be rounded to improve the roundness of the shell. In addition, the existence of the weld on the shell affects the integrity and service performance of the shell structure, and is easy to fracture and fail at the weld position. SUMMARY

[0003] The application provides a thin-wall titanium alloy shell forming and equal-material manufacturing system and a forming method to overcome the problems of high difficulty, poor performance and high requirement for equipment in the existing thin-wall titanium alloy shell forming method.

[0004] The thin-wall titanium alloy shell forming and equal-material manufacturing system comprises a machining chamber and a laser wire feeding printer, a three-axis motion machine tool, a turnover mechanism and a three-roller strong staggered distance spinning machine arranged in the machining chamber. The laser head of the laser wire feeding printer is vertically downward, and the laser wire feeding printer moves horizontally, vertically and longitudinally through the three-axis motion machine tool. The turnover mechanism comprises a three-jaw chuck, a rotating motor, a turnover table and a turnover motor. The three-jaw chuck is rotatably installed on the turnover table and is driven to rotate by the rotating motor. The turnover motor is used to drive the turnover table to turn between the horizontal direction and the vertical direction. The three-roller strong staggered distance spinning machine comprises a mandrel, a tail top shaft, a hydraulic cylinder, a horizontal guide rail I and a roller support. The mandrel is used to be connected with the three-jaw chuck when the turnover table is turned to the horizontal direction. The tail top shaft is coaxially arranged with the mandrel and is driven to approach or move away from the mandrel by the hydraulic cylinder. The horizontal guide rail I is arranged in parallel below the mandrel and the tail top shaft. The roller support is slidably connected with the horizontal guide rail I and is driven to slide along the horizontal guide rail I by a roller support feeding mechanism. The roller support is provided with a roller support bracket I, a roller support bracket II and a roller support bracket III. The roller support bracket I, the roller support bracket II and the roller support bracket III are correspondingly provided with a roller I, a roller II and a roller III. The rollers I, II and III are arranged around the mandrel and the tail top shaft, and the roller supports are driven to approach or move away from the mandrel and the tail top shaft by corresponding roller support feeding mechanisms.

[0005] The thin-wall titanium alloy shell forming and equal-material manufacturing system further comprises a protective gas system. The protective gas system is used to deliver protective gas to the machining chamber.

[0006] The three-axis motion machine tool comprises a support frame I, a support frame II, a longitudinal guide rail I, a longitudinal guide rail II, a longitudinal driving mechanism, a crossbeam, a transverse guide rail II, a vertical beam, a transverse driving mechanism, a vertical guide rail and a vertical driving mechanism; the support frame I and the support frame II are oppositely arranged; the longitudinal guide rail I and the longitudinal guide rail II are arranged on the support frame I and the support frame II respectively; the crossbeam is slidably connected with the longitudinal guide rail I and the longitudinal guide rail II and is driven to move longitudinally by the longitudinal driving mechanism; the transverse guide rail II is arranged on the crossbeam; the vertical beam is slidably connected with the transverse guide rail II and is driven to move transversely by the transverse driving mechanism; the vertical guide rail is arranged on the vertical beam; and the laser wire feeding printer is slidably connected with the vertical guide rail and is driven to move vertically by the vertical driving mechanism.

[0007] The turnover mechanism further comprises a fixing frame and a holding frame; the turnover table is rotationally connected with the fixing frame through a turnover shaft I and a turnover shaft II; the holding frame is fixed on the fixing frame; and the turnover motor is fixed on the holding frame, and an output shaft is connected with the turnover shaft II through the holding frame.

[0008] The three-axis motion machine tool comprises a support frame I, a support frame II, a longitudinal guide rail I, a longitudinal guide rail II, a longitudinal driving mechanism, a crossbeam, a transverse guide rail II, a vertical beam, a transverse driving mechanism, a vertical guide rail and a vertical driving mechanism; the support frame I and the support frame II are oppositely arranged; the longitudinal guide rail I and the longitudinal guide rail II are arranged on the support frame I and the support frame II respectively; the crossbeam is slidably connected with the longitudinal guide rail I and the longitudinal guide rail II and is driven to move longitudinally by the longitudinal driving mechanism; the transverse guide rail II is arranged on the crossbeam; the vertical beam is slidably connected with the transverse guide rail II and is driven to move transversely by the transverse driving mechanism; the vertical guide rail is arranged on the vertical beam; and the laser wire feeding printer is slidably connected with the vertical guide rail and is driven to move vertically by the vertical driving mechanism.

[0009] The three-axis motion machine tool comprises a support frame I, a support frame II, a longitudinal guide rail I, a longitudinal guide rail II, a longitudinal driving mechanism, a crossbeam, a transverse guide rail II, a vertical beam, a transverse driving mechanism, a vertical guide rail and a vertical driving mechanism; the support frame I and the support frame II are oppositely arranged; the longitudinal guide rail I and the longitudinal guide rail II are arranged on the support frame I and the support frame II respectively; the crossbeam is slidably connected with the longitudinal guide rail I and the longitudinal guide rail II and is driven to move longitudinally by the longitudinal driving mechanism; the transverse guide rail II is arranged on the crossbeam; the vertical beam is slidably connected with the transverse guide rail II and is driven to move transversely by the transverse driving mechanism; the vertical guide rail is arranged on the vertical beam; and the laser wire feeding printer is slidably connected with the vertical guide rail and is driven to move vertically by the vertical driving mechanism.

[0010] The three-axis motion machine tool comprises a support frame I, a support frame II, a longitudinal guide rail I, a longitudinal guide rail II, a longitudinal driving mechanism, a crossbeam, a transverse guide rail II, a vertical beam, a transverse driving mechanism, a vertical guide rail and a vertical driving mechanism; the support frame I and the support frame II are oppositely arranged; the longitudinal guide rail I and the longitudinal guide rail II are arranged on the support frame I and the support frame II respectively; the crossbeam is slidably connected with the longitudinal guide rail I and the longitudinal guide rail II and is driven to move longitudinally by the longitudinal driving mechanism; the transverse guide rail II is arranged on the crossbeam; the vertical beam is slidably connected with the transverse guide rail II and is driven to move transversely by the transverse driving mechanism; the vertical guide rail is arranged on the vertical beam; and the laser wire feeding printer is slidably connected with the vertical guide rail and is driven to move vertically by the vertical driving mechanism.

[0011] The three-axis motion machine tool comprises a support frame I, a support frame II, a longitudinal guide rail I, a longitudinal guide rail II, a longitudinal driving mechanism, a crossbeam, a transverse guide rail II, a vertical beam, a transverse driving mechanism, a vertical guide rail and a vertical driving mechanism; the support frame I and the support frame II are oppositely arranged; the longitudinal guide rail I and the longitudinal guide rail II are arranged on the support frame I and the support frame II respectively; the crossbeam is slidably connected with the longitudinal guide rail I and the longitudinal guide rail II and is driven to move longitudinally by the longitudinal driving mechanism; the transverse guide rail II is arranged on the crossbeam; the vertical beam is slidably connected with the transverse guide rail II and is driven to move transversely by the transverse driving mechanism; the vertical guide rail is arranged on the vertical beam; and the laser wire feeding printer is slidably connected with the vertical guide rail and is driven to move vertically by the vertical driving mechanism. S1, manufacturing of a thin-wall titanium alloy shell blank; t1, adjusting the turnover table to make the three-jaw chuck vertically upward, the three-jaw chuck axis being parallel to the laser head axis, and installing the titanium alloy base plate on the three-jaw chuck; t2, Install the titanium alloy welding wire in the laser wire feeding printer, adjust the laser wire feeding printer so that the laser spot is aligned with the position of the titanium alloy substrate, and focus the laser and the protruding end of the titanium alloy welding wire. Receive protective gas into the processing chamber and use laser wire feeding additive manufacturing to produce thin-walled titanium alloy shell blanks. S2, additive manufacturing on the surface of thin-walled titanium alloy shell blank; t1, rotate the tilting table 90° to make the axis of the three-jaw chuck perpendicular to the axis of the laser head, release the three-jaw chuck, and remove the thin-walled titanium alloy shell blank; t2, Install the mandrel on the three-jaw chuck and tighten it to secure it; t3, The thin-walled titanium alloy shell blank is installed on the mandrel and tightened by the tail shaft; t4, Adjust the laser wire feeding printer to align the laser spot with the thin-walled titanium alloy shell blank, and add a single layer of titanium alloy on the surface of the thin-walled titanium alloy shell blank to prepare the laser wire feeding additive thin-walled titanium alloy shell; S3, Spin forming of thin-walled titanium alloy shell; t1, start the three-wheel high-power staggered spinning machine to spin the surface of the laser-fed additive thin-walled titanium alloy shell; t2, after a single spinning pass is completed, the spinning wheel returns to its original position; t3, Adjust the laser wire feed printer so that the laser spot is aligned with the surface position of the spun thin-walled titanium alloy shell, and start the next layer of laser wire feed additive manufacturing; S4. Laser wire feeding additive manufacturing and spin forming are alternately performed on the surface of the thin-walled titanium alloy shell. After the preset wall thickness is achieved, the manufacturing of the thin-walled titanium alloy shell is completed.

[0012] In step S1, the laser power is 1120w, the wire feeding speed is 17mm / s, the laser wire feeding printer moving speed is 10mm / s, and the interlayer overlap is 1.7mm. In steps S2 and S4, the laser power is 1120w, the wire feeding speed is 17mm / s, the laser wire feeding printer moving speed is 10mm / s, the interlayer overlap is 1.7mm, and the mandrel rotation speed is 100rpm. In steps S3 and S4, the thinning amount per spin is 5% to 8%.

[0013] The above-mentioned thin-walled titanium alloy shell forming additive manufacturing method further includes step S5, turning off the laser wire feeding printer and the three-wheel high-strength staggered-pitch spinning machine, and removing the formed thin-walled titanium alloy shell; Step S6: The end portion of the thin-walled titanium alloy shell is machined by turning.

[0014] Compared with the prior art, the present invention has the following beneficial effects.

[0015] The present application prepares a thin-walled titanium alloy shell blank by laser wire feeding additive manufacturing, and alternately carries out laser wire feeding additive manufacturing and spinning forming to prepare the thin-walled titanium alloy shell on the basis of the prepared blank. The heat generated in the laser wire feeding additive manufacturing process is used for high-temperature spinning forming, without the need for additional heating, thereby saving energy and reducing energy consumption. The prepared titanium alloy thin-walled shell has the advantages of good structural completeness, high strength, and large forming caliber, and is a feasible forming method for preparing a large-caliber, high-temperature-resistant, thin-walled shell, which effectively overcomes the problems of high difficulty, poor performance, and high requirement for equipment in the existing thin-walled titanium alloy shell forming method. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 It is a schematic diagram of the additive and equal material manufacturing system for thin-walled titanium alloy shell forming. Figure 2 It is an assembly drawing of the laser wire feeding printer and the three-axis motion machine tool. Figure 3 It is a schematic diagram of the turnover mechanism. Figure 4 It is a process schematic diagram of the additive and equal material manufacturing thin-walled titanium alloy shell.

[0018] Reference numerals in the drawings: 1- machining chamber; 2- laser wire feeding printer; 2.1- laser head; 2.2- titanium alloy welding wire; 3- base; 4- control cabinet; 4.1- display screen; 4.2- power switch indicator light; 4.3- power switch; 4.4- spinning switch indicator light; 4.5- spinning switch; 4.6- laser switch indicator light; 4.7- laser switch; 4.8- wire feeding switch indicator light; 4.9- wire feeding switch; 4.10- protective gas switch indicator light; 4.11- protective gas switch; 4.12- turnover mechanism switch indicator light; 4.13- turnover mechanism switch; 4.14- laser position control indicator light; 4.15- laser position control button; 4.16- spinning wheel control button indicator light; 4.17- spinning wheel control button; 4.18- laser power control indicator light; 4.19- laser power control button; 4.20- spinning mandrel control indicator light; 4.21- spinning mandrel control button; 4.22- turnover mechanism control button indicator light; 4.23- turnover mechanism control button; 4.24- wire feeding control button indicator light; 4.25- wire feeding control button; 5.1 - support frame I; 5.2 - support frame II; 5.3 - longitudinal guide rail I; 5.4 - longitudinal guide rail II; 5.5 - cross beam; 5.6 - transverse guide rail II; 5.7 - vertical beam; 5.8 - vertical guide rail; 6.1 - three-jaw chuck; 6.2 - rotary motor; 6.3 - overturning table; 6.4 - overturning motor; 6.5 - fixed frame; 6.6 - retaining frame; 6.7 - overturning shaft I; 6.8 - overturning shaft II; 7.1 - mandrel; 7.2 - tail top shaft; 7.3 - hydraulic cylinder; 7.4 - transverse guide rail I; 7.5 - spinning wheel support; 7.6 - spinning wheel support I; 7.7 - spinning wheel shaft I; 7.8 - spinning wheel I; 7.9 - spinning wheel fixing ring I; 7.10 - spinning wheel support II; 7.11 - spinning wheel shaft II; 7.12 - spinning wheel II; 7.13 - spinning wheel fixing ring II; 7.14 - spinning wheel support III; 7.15 - spinning wheel shaft III; 7.16 - spinning wheel III; 7.17 - spinning wheel fixing ring III; 100 - thin-walled titanium alloy shell. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0020] The laser wire feeding additive manufacturing technology has high product preparation efficiency, high material utilization rate, and theoretically unlimited caliber, and can prepare large-caliber thin-walled titanium alloy shells. However, the surface quality of the thin-walled titanium alloy shell prepared by the laser wire feeding additive manufacturing is poor, and titanium alloy is subjected to multiple thermal cycles in the process of laser wire feeding additive manufacturing, which easily causes grain coarsening and large residual stress, affecting the service performance of the cylinder.

[0021] The strong staggered spinning forming method is particularly suitable for the preparation of thin-walled shell members, and has high member forming precision, high material utilization rate, refined base alloy grain size, and improved mechanical properties of the member.

[0022] Based on the forming characteristics of the seamless large-caliber thin-walled titanium alloy shell, the present application combines the technical characteristics of the laser wire feeding additive manufacturing method and the spinning forming method, uses the laser wire feeding additive manufacturing method to prepare a thin-walled titanium alloy blank, and alternately performs laser wire feeding additive manufacturing and strong staggered spinning forming on the basis of the preparation of the blank, so as to realize the preparation of a high-performance thin-walled large-caliber titanium alloy shell, develop a processing system and a process method with dual characteristics of laser wire feeding additive manufacturing and spinning forming, and enrich the preparation methods and forming equipment of the seamless large-caliber high-temperature alloy cylinder.

[0023] Example 1 The embodiment provides a thin-wall titanium alloy shell forming additive-subtractive manufacturing system, which comprises a machining chamber 1, a laser wire feeding printer 2, a three-axis motion machine tool, a turnover mechanism, a three-roller power staggered distance spinning machine, a base 3 and a control cabinet 4; the machining chamber 1 is installed on the base 3; the laser wire feeding printer 2, the three-axis motion machine tool, the turnover mechanism and the three-roller power staggered distance spinning machine are all installed in the machining chamber 1 and connected with the control cabinet 4 through connecting lines.

[0024] The laser head 2.1 of the laser wire feeding printer 2 is vertically downward, the laser wire feeding printer 2 moves in the horizontal direction, the vertical direction and the horizontal direction through the three-axis motion machine tool, and laser wire feeding additive manufacturing is carried out by taking titanium alloy welding wire 2.2 as raw material.

[0025] The three-axis motion machine tool comprises a support frame I 5.1, a support frame II 5.2, a longitudinal guide rail I 5.3, a longitudinal guide rail II 5.4, a longitudinal driving mechanism, a cross beam 5.5, a horizontal guide rail II 5.6, a vertical beam 5.7, a horizontal driving mechanism, a vertical guide rail 5.8 and a vertical driving mechanism; the support frame I 5.1 and the support frame II 5.2 are oppositely arranged and are both installed on the base 3; the longitudinal guide rail I 5.3 and the longitudinal guide rail II 5.4 are arranged on the support frame I 5.1 and the support frame II 5.2 respectively; the cross beam 5.5 is in sliding connection with the longitudinal guide rail I 5.3 and the longitudinal guide rail II 5.4 and is driven to move longitudinally by the longitudinal driving mechanism; the horizontal guide rail II 5.6 is arranged on the cross beam 5.5; the vertical beam 5.7 is in sliding connection with the horizontal guide rail II 5.6 and is driven to move horizontally by the horizontal driving mechanism; the vertical guide rail 5.8 is arranged on the vertical beam 5.7; the laser wire feeding printer 2 is in sliding connection with the vertical guide rail 5.8 and is driven to move vertically by the vertical driving mechanism.

[0026] The turnover mechanism comprises a three-jaw chuck 6.1, a rotating motor 6.2, a turnover table 6.3, a turnover motor 6.4, a fixing frame 6.5 and a retaining frame 6.6; the fixing frame 6.5 is installed on the base 3; the turnover table 6.3 is rotationally connected with the fixing frame 6.5 through a turnover shaft I 6.7 and a turnover shaft II 6.8; the retaining frame 6.6 is fixed on the fixing frame 6.5; the turnover motor 6.4 is fixed on the retaining frame 6.6, the output shaft of the turnover motor 6.4 penetrates through the retaining frame 6.6 and is connected with the turnover shaft II 6.8, and is used to drive the turnover table 6.3 to turn between the horizontal direction and the vertical direction; the three-jaw chuck 6.1 is rotationally installed on the turnover table 6.3 and is driven to rotate by the rotating motor 6.2.

[0027] The three-roller strong power staggered distance spinning machine comprises a mandrel 7.1, a tail top shaft 7.2, a hydraulic cylinder 7.3, a transverse guide rail I 7.4 and a roller support 7.5; the mandrel 7.1 is used for being connected with the three-jaw chuck 6.1 when the turnover table 6.3 is turned over to be horizontal; the tail top shaft 7.2 is coaxially arranged with the mandrel 7.1 and is driven by the hydraulic cylinder 7.3 to be close to or away from the mandrel 7.1; the transverse guide rail I 7.4 is installed on the base 3 and is arranged in parallel below the mandrel 7.1 and the tail top shaft 7.2; the roller support 7.5 is slidingly connected with the transverse guide rail I 7.4 and is driven by a roller support feeding mechanism to slide along the transverse guide rail I 7.4; the roller support 7.5 is installed with a roller support I 7.6, a roller support II 7.10 and a roller support III 7.14; the roller support I 7.6 is correspondingly installed with a roller shaft I 7.7, a roller I 7.8 is rotatably sleeved on the roller shaft I 7.7 and is axially fixed by a roller fixing ring I 7.9; the roller support II 7.10 is correspondingly installed with a roller shaft II 7.11, a roller II 7.12 is rotatably sleeved on the roller shaft II 7.11 and is axially fixed by a roller fixing ring II 7.13; the roller support III 7.14 is correspondingly installed with a roller shaft III 7.15, a roller III 7.16 is rotatably sleeved on the roller shaft III 7.15 and is axially fixed by a roller fixing ring III 7.17; the rollers I, II and III are arranged around the mandrel 7.1 and the tail top shaft 7.2, and the roller supports are driven by corresponding roller support feeding mechanisms to be close to or away from the mandrel 7.1 and the tail top shaft 7.2.

[0028] The control cabinet 4 is provided with a display screen 4.1, a power switch indicator light 4.2, a power switch 4.3, a spinning switch indicator light 4.4, a spinning switch 4.5, a laser switch indicator light 4.6, a laser switch 4.7, a wire feeding switch indicator light 4.8, a wire feeding switch 4.9, a protective gas switch indicator light 4.10, a protective gas switch 4.11, a turnover mechanism switch indicator light 4.12, a turnover mechanism switch 4.13, a laser position control indicator light 4.14, a laser position control button 4.15, a roller control button indicator light 4.16, a roller control button 4.17, a laser power control indicator light 4.18, a laser power control button 4.19, a spinning mandrel control indicator light 4.20, a spinning mandrel control button 4.21, a turnover mechanism control button indicator light 4.22, a turnover mechanism control button 4.23, a wire feeding control button indicator light 4.24 and a wire feeding control button 4.25.

[0029] The thin-walled titanium alloy shell forming and equal-material manufacturing system further comprises a protective gas system; the protective gas system is used for conveying protective gas to the machining chamber.

[0030] Example 2 The embodiment provides a thin-walled titanium alloy shell forming and equal-material manufacturing forming method.

[0031] The thin-walled titanium alloy shell forming and equal-material manufacturing forming method is implemented by using the thin-walled titanium alloy shell forming and equal-material manufacturing system, and comprises the following steps. S1, thin-walled titanium alloy shell blank manufacturing; t1, adjust the turnover table 6.3 to make the three-jaw chuck 6.1 vertically upward, the axis of the three-jaw chuck 6.1 is parallel to the axis of the laser head 2.1, install the titanium alloy base plate on the three-jaw chuck 6.1, the size of the titanium alloy base plate is 34 mm in diameter and 8 mm in thickness; t2, install the titanium alloy welding wire 2.2 with a diameter of 1.2 mm in the laser wire feeding printer 2, adjust the laser wire feeding printer 2 to make the laser spot align with the position of the titanium alloy base plate, and focus the laser and the extension end of the titanium alloy welding wire, deliver the protective gas to the processing chamber 1, laser wire feeding additive manufacturing of the thin-walled titanium alloy shell blank, the laser power is 1120 w, the wire feeding speed is 17 mm / s, the moving speed of the laser wire feeding printer is 10 mm / s, the interlayer lap joint is 1.7 mm, the inner diameter of the thin-walled titanium alloy shell blank is 30 mm, the wall thickness is 2 mm, and the height is 50 mm; S2, thin-walled titanium alloy shell blank surface additive; t1, rotate the turnover table 6.3 by 90° to make the axis of the three-jaw chuck 6.1 perpendicular to the axis of the laser head 2.1, loosen the three-jaw chuck 6.1, and remove the thin-walled titanium alloy shell blank; t2, install the mandrel 7.1 on the three-jaw chuck 6.1 and tighten the fixing; t3, install the thin-walled titanium alloy shell blank on the mandrel 7.1 and tighten by the tail top shaft 7.2; t4, adjust the laser wire feeding printer 2 to make the laser spot align with the thin-walled titanium alloy shell blank, and prepare the laser wire feeding additive thin-walled titanium alloy shell by single-layer additive manufacturing of titanium alloy on the surface of the thin-walled titanium alloy shell blank, the laser power is 1120 w, the wire feeding speed is 17 mm / s, the moving speed of the laser wire feeding printer is 10 mm / s, the interlayer lap joint is 1.7 mm, and the rotating speed of the mandrel is 100 rpm; S3, spinning forming of the thin-walled titanium alloy shell; t1, start the three-rotor power staggered distance spinning machine, and perform spinning forming on the surface of the laser wire feeding additive thin-walled titanium alloy shell, and the single-time spinning thinning amount is 5% to 8%; t2, after single-pass spinning is completed, the spinning wheel is retracted; t3, adjust the laser wire feeding printer 2 to make the laser spot align with the surface position of the spun-forming titanium alloy thin-wall shell, start the laser wire feeding additive of the next layer; S4, alternately perform laser wire feeding additive and spun-forming on the surface of the thin-wall titanium alloy shell, and after reaching the preset wall thickness size, complete the manufacturing of the thin-wall titanium alloy shell.

[0032] The thin-wall titanium alloy shell forming additive-equivalent material manufacturing method further comprises the following step S5: turning off the laser wire feeding printer 2 and the three-roller power stagger spinning machine, and unloading the formed thin-wall titanium alloy shell. Step S6: turning the end position of the thin-wall titanium alloy shell. Step S7: packaging the prepared thin-wall titanium alloy shell with soft material, and storing it in a clean and dry environment, and preventing it from being affected by moisture, sunlight, acid, alkali and salt, and the storage temperature is 20 DEG C and the relative humidity is less than or equal to 10%.

[0033] In the preparation process of the thin-wall titanium alloy shell, titanium alloy wire is used as the raw material, laser is used as the heat source, and the titanium alloy thin-wall shell blank is manufactured by laser wire feeding additive manufacturing; on the basis of manufacturing the blank, the turnover mechanism is adjusted to realize additive manufacturing in the wall thickness direction; after completing single-layer additive manufacturing, the blank is subjected to power stagger spinning to refine the surface grain size, control the surface stress state and improve the material performance; the laser wire feeding additive manufacturing and the power stagger spinning process are alternately performed; finally, the wall thickness is thinned while the surface quality of the shell is improved through the spinning process. Through the process and system, high-efficiency, high-quality and high-performance high-temperature-resistant thin-wall seamless shell can be prepared.

[0034] Compared with the background art, the present application has obvious advancement, and is aimed at the problems of low material utilization rate, large welding residual stress and easy deformation in the process of preparing shells made of titanium alloy, nickel-based high-temperature alloy and the like, a additive-equivalent material manufacturing system with the functions of laser wire feeding additive manufacturing and power stagger spinning is designed, titanium alloy thin-wall shells are prepared by alternately performing laser wire feeding additive manufacturing and power stagger spinning, the interlayer grain size and the surface stress state are controlled, the microstructure in the process of laser wire feeding additive manufacturing is improved, the mechanical properties of the thin-wall shell are improved, and finally high-performance titanium alloy thin-wall shells are obtained, which is an effective method for preparing thin-wall high-strength alloy shells.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A thin-walled titanium alloy housing form- additive material manufacturing system, characterized by, The device comprises a processing chamber, a laser wire feeding printer, a three-axis motion machine tool, a turnover mechanism and a three-roller strong staggered distance spinning machine arranged in the processing chamber. The laser head of the laser wire feeding printer is vertically downward, and the laser wire feeding printer moves horizontally, longitudinally and vertically through the three-axis motion machine tool. The turnover mechanism comprises a three-jaw chuck, a rotating motor, a turnover table and a turnover motor. The three-jaw chuck is rotatably installed on the turnover table and is driven to rotate by the rotating motor. The turnover motor is used to drive the turnover table to turn between the horizontal direction and the vertical direction. The three-roller strong staggered distance spinning machine comprises a mandrel, a tail top shaft, a hydraulic cylinder, a horizontal guide rail I and a roller support. The mandrel is used to be connected with the three-jaw chuck when the turnover table is turned to the horizontal direction. The tail top shaft is coaxially arranged with the mandrel and is driven to approach or move away from the mandrel by the hydraulic cylinder. The horizontal guide rail I is arranged in parallel below the mandrel and the tail top shaft. The roller support is slidably connected with the horizontal guide rail I and is driven to slide along the horizontal guide rail I by a roller support feeding mechanism. The roller support is provided with a roller support bracket I, a roller support bracket II and a roller support bracket III, and the roller support bracket I, the roller support bracket II and the roller support bracket III are correspondingly provided with a roller I, a roller II and a roller III.

2. The thin-walled titanium alloy housing form-AM system of claim 1, wherein, The rollers I, II and III are arranged around the mandrel and the tail top shaft, and the roller supports are driven to approach or move away from the mandrel and the tail top shaft by corresponding roller support feeding mechanisms. The device further comprises a protective gas system.

3. The thin-walled titanium alloy housing form-AM system of claim 1 or 2, wherein, The protective gas system is used to deliver protective gas to the processing chamber. The three-axis motion machine tool comprises a support frame I, a support frame II, a longitudinal guide rail I, a longitudinal guide rail II, a longitudinal driving mechanism, a cross beam, a horizontal guide rail II, a vertical beam, a horizontal driving mechanism, a vertical guide rail and a vertical driving mechanism. The support frame I and the support frame II are oppositely arranged. The longitudinal guide rail I and the longitudinal guide rail II are arranged on the support frame I and the support frame II respectively. The cross beam is slidably connected with the longitudinal guide rail I and the longitudinal guide rail II and is driven to move longitudinally by the longitudinal driving mechanism. The horizontal guide rail II is arranged on the cross beam. The vertical beam is slidably connected with the horizontal guide rail II and is driven to move horizontally by the horizontal driving mechanism. The vertical guide rail is arranged on the vertical beam.

4. The thin-walled titanium alloy housing form-AM system of claim 3, wherein, The laser wire feeding printer is slidably connected with the vertical guide rail and is driven to move vertically by the vertical driving mechanism. The turnover mechanism further comprises a fixing frame and a retaining frame. The turnover table is rotatably connected with the fixing frame through turnover shafts I and II. The retaining frame is fixed on the fixing frame.

5. The thin-walled titanium alloy housing form-AM system of claim 4, wherein, The turnover motor is fixed on the retaining frame, and the output shaft penetrates through the retaining frame and is connected with the turnover shaft II. The roller support brackets I, II and III are correspondingly provided with roller shafts I, II and III. The roller I is rotatably sleeved on the roller shaft I and is axially fixed by a roller fixing ring I. The roller II is rotatably sleeved on the roller shaft II and is axially fixed by a roller fixing ring II.

6. The thin-walled titanium alloy housing form-AM system of claim 5, wherein, The roller III is rotatably sleeved on the roller shaft III and is axially fixed by a roller fixing ring III. The device further comprises a base and a control cabinet. The processing chamber, the horizontal guide rail I, the support frame I, the support frame II and the fixing frame are installed on the base. The laser wire feeding printer, the three-axis motion machine tool, the turnover mechanism and the three-roller strong staggered distance spinning machine are connected with the control cabinet through connecting lines.

7. A thin-walled titanium alloy shell form plus-equal material manufacturing forming method, characterized in that, Laser-fed additive manufacturing is used to produce thin-walled titanium alloy shell blanks. Laser-fed additive manufacturing and spin forming are alternately performed on the surface of the thin-walled titanium alloy shell blanks. After the preset wall thickness is achieved, the manufacturing of the thin-walled titanium alloy shell is completed.

8. The thin-walled titanium alloy housing net shape plus isometric material production forming method according to claim 7, characterized in that, The thin-walled titanium alloy shell forming additive manufacturing system according to any one of claims 2-6 is used, comprising the following steps: S1, manufacturing of thin-walled titanium alloy shell blanks; t1, Adjust the flipping stage so that the three-jaw chuck is vertically upward and the axis of the three-jaw chuck is parallel to the axis of the laser head, and install the titanium alloy substrate on the three-jaw chuck; t2, Install the titanium alloy welding wire in the laser wire feeding printer, adjust the laser wire feeding printer so that the laser spot is aligned with the position of the titanium alloy substrate, and focus the laser and the protruding end of the titanium alloy welding wire. Receive protective gas into the processing chamber and use laser wire feeding additive manufacturing to produce thin-walled titanium alloy shell blanks. S2, additive manufacturing on the surface of thin-walled titanium alloy shell blank; t1, rotate the tilting table 90° to make the axis of the three-jaw chuck perpendicular to the axis of the laser head, release the three-jaw chuck, and remove the thin-walled titanium alloy shell blank; t2, Install the mandrel on the three-jaw chuck and tighten it to secure it; t3, The thin-walled titanium alloy shell blank is installed on the mandrel and tightened by the tail shaft; t4, Adjust the laser wire feeding printer to align the laser spot with the thin-walled titanium alloy shell blank, and add a single layer of titanium alloy on the surface of the thin-walled titanium alloy shell blank to prepare the laser wire feeding additive thin-walled titanium alloy shell; S3, Spin forming of thin-walled titanium alloy shell; t1, start the three-wheel high-power staggered spinning machine to spin the surface of the laser-fed additive thin-walled titanium alloy shell; t2, after a single spinning pass is completed, the spinning wheel returns to its original position; t3, Adjust the laser wire feed printer so that the laser spot is aligned with the surface position of the spun thin-walled titanium alloy shell, and start the next layer of laser wire feed additive manufacturing; S4. Laser wire feeding additive manufacturing and spin forming are alternately performed on the surface of the thin-walled titanium alloy shell. After the preset wall thickness is achieved, the manufacturing of the thin-walled titanium alloy shell is completed.

9. The thin-walled titanium alloy housing net shape plus isometric material fabrication forming method according to claim 8, characterized in that, In step S1, the laser power is 1120w, the wire feeding speed is 17mm / s, the laser wire feeding printer moving speed is 10mm / s, and the interlayer overlap is 1.7mm. In steps S2 and S4, the laser power is 1120w, the wire feeding speed is 17mm / s, the laser wire feeding printer moving speed is 10mm / s, the interlayer overlap is 1.7mm, and the mandrel rotation speed is 100rpm. In steps S3 and S4, the thinning amount per spin is 5% to 8%.

10. The thin-walled titanium alloy housing net shape plus isometric material manufacturing forming method according to claim 8, characterized in that, It also includes step S5, turning off the laser wire feeding printer and the three-wheel high-power staggered spinning machine, and removing the formed thin-walled titanium alloy shell; Step S6: The end portion of the thin-walled titanium alloy shell is machined by turning.

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