A masking device for nozzle support structure family parts and method of use

Abstract

The application provides a shielding device for nozzle support structure parts, which comprises a first welding position where a first welding part contacts a second welding part, a second welding position where the second welding part contacts a third welding part; a base assembly, the bottom of the second welding part and the third welding part are fixed on the base assembly; a first welding spatter shielding assembly, the first welding spatter shielding assembly comprises a center column, the center column is arranged on the central axis of the first welding spatter shielding assembly, the first welding spatter shielding assembly is connected with the base assembly through the center column, and the first welding spatter shielding assembly is arranged at the first welding position; a positioning assembly and a second welding spatter shielding assembly, the second welding spatter shielding assembly is positioned and connected with the base assembly through the positioning assembly, and the second welding spatter shielding assembly is arranged at the second welding position. The shielding device can effectively clamp the nozzle support structure parts, and the two shielding assemblies can effectively shield the spatters of the two welding positions.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of manufacturing of aero-engine parts, in particular to a shielding device for nozzle support structure parts and a use method thereof. BACKGROUND

[0002] In the process of manufacturing aero-engine parts, electron beam welding has become an indispensable process technology in the process of manufacturing aero-engine parts due to its unique properties, such as energy concentration, high density, small heat-affected zone, and small deformation. In the process of electron beam welding of aero-engine parts, such as nozzle support structure parts, a certain proportion is occupied.

[0003] As shown in Figure 22 and Figure 23 , the nozzle support structure part (welded finished part) is in a cylindrical shape with a closed top and bottom. The nozzle support structure part is composed of three parts, including a first welding part 29, a second welding part 30 (cast body), and a third welding part 31.

[0004] During the welding process, the first welding part has a certain distance between the secondary electron beam slot and the back of the weld due to the structure of the nozzle support structure part being a rotating part and the diameter of the upper and lower structures of the weld being smaller than the diameter of the weld position (as shown in Figure 22 32). Due to the large contour of the second welding part 30 (cast body), a large space needs to be reserved at the top of the secondary electron beam slot on the back to prevent the clamp from lifting the part and affecting assembly. Due to the large gap between the back of the welding part and the secondary electron beam absorption slot, a large amount of spatter generated during welding adheres to the inner surface of the cast 30 from the gap. The inner surface is not processed subsequently, and the adhered spatter needs to be removed manually. During the removal process, the part is easily scratched and damaged, and in addition, some spatter is adhered and fused firmly and cannot be removed. During the removal of the spatter, the scratches and damages cause defects in the appearance of the part, and even the part is scrapped. The spatter that cannot be removed increases the weight of the part, which directly affects the performance of the aero-engine. SUMMARY

[0005] Therefore, the present specification provides a shielding device for nozzle support structure parts and a use method thereof, which achieves the purpose of shielding the electron beam spatter of the two welding parts.

[0006] The present specification provides the following technical solutions:

[0007] A shielding device for nozzle support structure parts, comprising:

[0008] The nozzle support structure part includes a first welding part, a second welding part and a third welding part, wherein the welding position is a first welding position where the first welding part contacts the second welding part, and a second welding position where the second welding part contacts the third welding part;

[0009] The base assembly is fixed to the bottom of the second welding part and the third welding part;

[0010] The first welding spatter shielding assembly includes a center column arranged on the central axis of the first welding spatter shielding assembly, and the first welding spatter shielding assembly is connected to the base assembly through the center column and arranged at the first welding position;

[0011] The positioning assembly and the second welding spatter shielding assembly are positioned and connected to the base assembly through the positioning assembly, and the second welding spatter shielding assembly is arranged at the second welding position.

[0012] Further, the first welding spatter shielding assembly further includes:

[0013] The small-end spatter blocking ring, the transmission cylinder and the large screw, the outer periphery of the small-end spatter blocking ring is provided with a groove structure, the groove structure faces the first welding position, the small-end spatter blocking ring and the transmission cylinder are sequentially sleeved, and the small-end spatter blocking ring is connected to the center column through the large screw.

[0014] Further, the first welding spatter shielding assembly further includes:

[0015] The handle, the arc-shaped transmission rod and the spatter blocking piece, the handle is connected to the transmission cylinder, one end of the arc-shaped transmission rod is fixed to the transmission cylinder, and the other end of the arc-shaped transmission rod is fixed to the spatter blocking piece.

[0016] The guide rail and the slide, the guide rail is fixed to the small-end spatter blocking ring, the slide is fixed to the spatter blocking piece, and the guide rail can slide within the range of the slide.

[0017] Further, the second welding spatter shielding assembly includes:

[0018] The large-end spatter blocking ring and the limiting piece, the limiting piece is welded to the large-end spatter blocking ring;

[0019] The stepped pin, the blocking ring base and the spring, one end of the stepped pin is connected to the transmission cylinder, the other end of the stepped pin is sleeved into the spring, the large-end spatter blocking ring is fixed to the blocking ring base through the limiting piece, and one end of the spring abuts against the large-end spatter blocking ring;

[0020] The large-end spatter blocking ring is arranged at the second welding position.

[0021] Further, the positioning assembly includes:

[0022] The top compression nut and the cover plate, the cover plate is sleeved on the top end of the center column, and the outer wall of the cover plate abuts against the first welding part, and the nozzle supporting structure part is fastened with the shielding device through the top compression nut;

[0023] The positioning pin and the screw, the second welding spatter shielding assembly is connected with the base assembly through the positioning pin and the screw.

[0024] Further, the base assembly comprises a base body and a pressing plate fixing element;

[0025] The base body comprises a first positioning circle, a second positioning circle, a first threaded hole and a base center hole, the base center hole is arranged at the center of the base body, the second positioning circle and the first positioning circle are both circular ring protrusions arranged on the bottom plate of the base body, and the first threaded hole is arranged in the radial direction of the bottom plate;

[0026] The pressing plate fixing element comprises a pressing plate nut, a pressing plate, a center nut and a stud, the stud is sleeved with the pressing plate, and the pressing plate nut fixes the pressing plate on the base body through the stud;

[0027] The third welding part abuts against the first positioning circle, and the outer wall of the third welding part is fixed with the base body through the pressing plate element;

[0028] The second welding part abuts against the second positioning circle;

[0029] The second welding spatter shielding assembly is fixed with the base assembly through the first threaded hole;

[0030] The center column is inserted into the base center hole, and the first welding spatter shielding assembly is positioned and connected with the base assembly through the center column and the base center hole.

[0031] Further, the method for using the shielding device comprises:

[0032] The second welding part and the third welding part are respectively fixed on the base assembly, and then the first welding part is installed in the shielding device;

[0033] The spatter baffle of the first welding spatter shielding assembly is fixed by using the handle;

[0034] The cover plate is installed in the shielding device, so that the inner circle of the first welding part is attached to the outer circle of the cover plate, and the center hole of the cover plate is concentric with the center column;

[0035] After the base assembly of the shielding device and the nozzle supporting structure part are positioned by rotating the pressing plate and using the pressing plate nut, the top compression nut is used for fixation;

[0036] The shielding device is hoisted to the machine tool, and the pressing plate of the machine tool is installed in the base assembly;

[0037] The first welding part and the second welding part are welded respectively;

[0038] The completed nozzle support structure part is detached from the shielding device.

[0039] Further, the handle is used to fix the splashing baffle of the first welding seam splashing shielding assembly, comprising:

[0040] The handle is rotated to drive the transmission cylinder to move the arc-shaped transmission rod;

[0041] The arc-shaped transmission rod drives the plurality of splashing baffles to move on the slide way, so that the splashing baffles expand radially until the outer periphery of the splashing baffles abuts against the inner diameter of the second welding part;

[0042] The handle is tightened, so that the end of the handle abuts against the center column.

[0043] Compared with the prior art, the above at least one technical scheme adopted by the embodiment of the present application can achieve at least the following beneficial effects:

[0044] The shielding device can clamp the nozzle support structure part to be welded as a whole, the first welding seam splashing shielding mechanism assembly can effectively shield part of the splashing of the first welding position, and after the welding is completed, the subassembly can be easily detached. Meanwhile, the second welding seam splashing shielding mechanism assembly solves the problem of splashing shielding of the second welding position. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only 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.

[0046] Figure 1 The first schematic view of the shielding device for the nozzle support structure part of the embodiment of the present application;

[0047] Figure 2 The second schematic view of the shielding device for the nozzle support structure part of the embodiment of the present application;

[0048] Figure 3 The front view of the first welding seam splashing shielding assembly of the embodiment of the present application;

[0049] Figure 4 The first schematic view of the first welding seam splashing shielding assembly of the embodiment of the present application;

[0050] Figure 5 The second schematic view of the first welding seam splashing shielding assembly of the embodiment of the present application;

[0051] Figure 6Structure diagram of the center column of the embodiment of the present application;

[0052] Figure 7 Structure diagram of the splash baffle of the embodiment of the present application;

[0053] Figure 8 Structure diagram of the guide rail of the embodiment of the present application;

[0054] Figure 9 Structure diagram of the slide structure of the embodiment of the present application;

[0055] Figure 10 Disassembled structure diagram of the second welding seam splash shielding assembly of the embodiment of the present application;

[0056] Figure 11 Top view of the baffle ring base of the embodiment of the present application;

[0057] Figure 12 Perspective view of the baffle ring base of the embodiment of the present application;

[0058] Figure 13 Top view of the cover plate of the embodiment of the present application;

[0059] Figure 14 A-A sectional view of Figure 13 ;

[0060] Figure 15 Structure diagram of the small-end splash baffle ring of the embodiment of the present application;

[0061] Figure 16 Top view of the small-end splash baffle ring of the embodiment of the present application;

[0062] Figure 17 Structure diagram of the arc-shaped transmission rod of the embodiment of the present application;

[0063] Figure 18 Structure diagram of the transmission cylinder of the embodiment of the present application;

[0064] Figure 19 Sectional view of the transmission cylinder of the embodiment of the present application;

[0065] Figure 20 A-A sectional view of Figure 19 ;

[0066] Figure 21 Structure diagram of the device base of the present application;

[0067] Figure 22 Structure diagram of the part clamping of the present application;

[0068] Figure 23 Structure diagram of the part designed by the present application.

[0069] Explanation of reference signs: 1, top compression nut; 2, cover plate; 201, cover plate lightening hole; 202, cover plate center hole; 203, cover plate inner cavity; 204, cover plate outer circle; 3, first welding spatter shielding assembly; 4, center column fixing screw; 5, positioning pin; 6, screw; 7, second welding spatter shielding assembly; 8, base assembly; 801, first positioning circle; 802, second positioning circle; 803, disassembly groove; 804, pin hole; 805, first threaded hole; 806, through groove; 807, second threaded hole; 808, base center hole; 809, third threaded hole; 810, fourth threaded hole; 9, handle; 10, arc-shaped transmission rod; 1001, shaft pin; 1002, transmission rod hole; 11, screw shaft; 12, transmission cylinder; 1201, transmission cylinder threaded hole; 1202, installation window; 1203, transmission cylinder hole; 1204, transmission cylinder extension ring; 1205, transmission cylinder barrel; 1206, bearing ball; 13, large screw; 14, small end spatter retaining ring; 1401, small end spatter retaining ring center hole; 1403, small end spatter retaining ring lightening hole; 1404, small end spatter retaining ring threaded hole; 1405, transmission cylinder center; 15, guide rail; 1501, guide rail protruding part; 16, slide; 1601, slide recessed groove; 1602, slide plane; 17, spatter retaining piece; 1701, upper section of spatter retaining piece; 1702, lower section of spatter retaining piece; 1703, spatter retaining piece support body; 18, center column; 1801, center column threaded hole; 1802, center column step; 1803, center column base; 19, guide rail fastening screw; 20, large end spatter retaining ring; 21, limiting piece; 22, step pin; 23, spring; 24, retaining ring base; 2401, limiting boss; 2402, pin hole; 2403, retaining ring threaded hole; 2404, retaining ring base light hole; 25, pressing plate nut; 26, pressing plate; 27, center nut; 28, stud; 29, first welding part; 30, second welding part; 31, third welding part; 32, first welding position; 33, second welding position. DETAILED DESCRIPTION

[0070] The embodiments of the present application are described in detail below with reference to the drawings.

[0071] The following detailed description is presented in order to describe the embodiments of the application and it is not intended that the application be limited thereto. It will be appreciated that the described embodiments are merely examples of the application and are not the only way in which the application can be implemented or used. The description of the embodiments is presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Modifications and variations are possible in light of the above teachings. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims and the metes of equivalency.

[0072] It is to be understood that the aspects described below are merely examples of aspects of the application and are not intended to be limiting of the application. The aspects described herein can be combined with each other, unless specifically noted otherwise. It is intended that the scope of the application be defined by the claims and metes of equivalency.

[0073] It is also to be understood that the following description is only illustrative of the aspects of the application and that no limitation of the scope of the application is intended by the description. The aspects described herein can be combined with each other, unless specifically noted otherwise. It is intended that the scope of the application be defined by the claims and metes of equivalency.

[0074] Furthermore, in the following description, numerous specific details are set forth in order to provide a thorough understanding of the examples. However, it will be apparent to one of ordinary skill in the art that the aspects described herein can be practiced without these specific details.

[0075] As shown in Figure 22 As shown in Figure 23 The nozzle support structure part includes a first welding part 29, a second welding part 30 and a third welding part 31, wherein the welding positions are a first welding position 32 where the first welding part 29 contacts the second welding part 30, and a second welding position 33 where the second welding part 30 contacts the third welding part 31. Figure 23 As shown in the figure, there are two electron beam welding positions.

[0076] The technical solutions provided by the embodiments of the application are described below with reference to the drawings.

[0077] As shown in Figure 1 and Figure 2 , the shielding device of the nozzle support structure class parts includes a first welding spatter shielding assembly 3, a center column fixing screw 4, a positioning assembly, a base assembly 8, a second welding spatter shielding assembly 7.

[0078] As shown in Figure 3 , Figure 4 , Figure 5 , the first welding spatter shielding assembly 3 includes a handle 9, an arc-shaped transmission rod 10, a screw shaft 11, a transmission cylinder 12, a large screw 13, a small-end spatter baffle ring 14, a guide rail 15, a slide 16, a spatter baffle 17 and a center column 18. The first welding spatter shielding assembly 3 is used for shielding the small-end welding back secondary electron beam (the upper beam in Figure 23 ) and spatter. The small-end spatter baffle ring 14 and the transmission cylinder 12 are sequentially sleeved, the small-end spatter baffle ring 14 is connected with the center column 18 through the large screw 13; the small-end spatter baffle ring 14 is arranged at the first welding position 32; the handle 9 is connected with the transmission cylinder 12, one end of the arc-shaped transmission rod 10 is fixed on the transmission cylinder 12, and the other end of the arc-shaped transmission rod 10 is fixed with the spatter baffle 17; the guide rail 15 is fixed on the small-end spatter baffle ring 14, the slide 16 is fixed on the spatter baffle 17, and the guide rail 15 can slide within the range of the slide 16. The spatter baffle 17 can be radially telescopic through the slide 16.

[0079] Specifically, the small-end spatter baffle ring 14 is used for absorbing the residual energy of the electron beam welding penetration, preventing the burning of the fixture center shaft or the generation of secondary welding seam in the non-welding area of the part. In addition, the groove structure of the small-end spatter baffle ring 14 can shield a small part of the spatter. The spatter baffle 17 is used for shielding the spatter relative to the direction of the casting (i.e. the inside of the casting) at the first welding position. The radial telescopic spatter baffle 17 compensates for the shielding blind area of the small-end spatter baffle ring 14, and realizes 100% spatter shielding of the casting on one side of the first welding position.

[0080] As shown in Figure 10 , the second welding spatter shielding assembly 7 includes a large-end spatter baffle ring 20, a limiting piece 21, a stepped pin 22, a baffle ring base 24 and a spring 23. The second welding spatter shielding assembly 7 is used for shielding the large-end welding back secondary electron beam and spatter. The limiting piece 21 is welded on the large-end spatter baffle ring 20; one end of the stepped pin 22 is connected with the baffle ring base 24, the other end of the stepped pin 22 is sleeved into the spring 23, the large-end spatter baffle ring 20 is fixed with the baffle ring base 24 through the limiting piece 21, so that one end of the spring 23 abuts against the large-end spatter baffle ring 20; the large-end spatter baffle ring 20 is arranged at the second welding position 33.

[0081] The positioning assembly includes a top compression nut 1, a cover plate 2, a positioning pin 5 and a screw 6. The cover plate 2 is sleeved on the top end of the center column 18, and the outer wall of the cover plate 2 abuts against the first welding part 29. The shielding device and the nozzle support structure part are fastened by the top compression nut 1. The second welding spatter shielding assembly 7 is connected with the base assembly 8 by the positioning pin 5 and the screw 6.

[0082] The top compression nut 1 is used for fastening the shielding device and the nozzle support structure part after the part clamping is completed. The cover plate 2 is used for cooperating with the top compression nut to compress the whole shielding device and the part, and has a centering effect, so as to ensure that the shielding device and the nozzle support structure part are in a center. The center column fixing screw 4, totally 4, is used for connecting and fixing the center column 18 and the base assembly 8. The positioning pin 5, totally 2, is used for positioning the second welding spatter shielding assembly 7 and the base assembly 8. The screw 6, totally 8, is used for connecting and fastening the second welding spatter shielding assembly 7 and the base assembly 8.

[0083] As shown in FIG. 6, the center column 18 includes a center column threaded hole 1801, a center column step 1802 and a center column base 1803.

[0084] As shown in FIG. 7, the spatter baffle 17 includes a spatter baffle upper segment 1701, a spatter baffle lower segment 1702 and a spatter baffle support body 1703. The spatter baffle upper segment 1701 and the spatter baffle lower segment 1702 are both used for shielding spatter. The step is used for avoiding interference with the adjacent baffle when the baffle is radially stretched to the maximum. The spatter baffle support body 1703 is used for providing rigid support for the spatter baffle 17 and providing the function of connecting the arc-shaped transmission rod 10 and the guide rail 15. Figure 7 As shown in FIG. 8, the guide rail 15 includes a guide rail protruding part 1501. The slide 16 includes a slide recessed groove 1601 and a slide plane 1602.

[0085] Figure 8 As shown in FIG. 9, the baffle ring base 24 includes a limiting boss 2401, a pin hole 2402, a baffle ring threaded hole 2403 and a baffle ring base light hole 2404. The pin hole 2402 is used for positioning the baffle ring base 24 and the base assembly 8. The baffle ring threaded hole 2403 is used for connecting with the base assembly 8. The baffle ring base light hole 2404 is used for connecting the large-end spatter baffle ring 20. The large end of the step pin 22 is assembled into the baffle ring base light hole 2404 through interference fit, and the up and down movement of the large-end spatter baffle ring 20 is realized by cooperating the step pin 22 with the spring 23. Figure 9 As shown in FIG. 10, the baffle ring base 24 includes a limiting boss 2401, a pin hole 2402, a baffle ring threaded hole 2403 and a baffle ring base light hole 2404. The pin hole 2402 is used for positioning the baffle ring base 24 and the base assembly 8. The baffle ring threaded hole 2403 is used for connecting with the base assembly 8. The baffle ring base light hole 2404 is used for connecting the large-end spatter baffle ring 20. The large end of the step pin 22 is assembled into the baffle ring base light hole 2404 through interference fit, and the up and down movement of the large-end spatter baffle ring 20 is realized by cooperating the step pin 22 with the spring 23.

[0086] Figure 11 As shown in FIG. 11, the baffle ring base 24 includes a limiting boss 2401, a pin hole 2402, a baffle ring threaded hole 2403 and a baffle ring base light hole 2404. The pin hole 2402 is used for positioning the baffle ring base 24 and the base assembly 8. The baffle ring threaded hole 2403 is used for connecting with the base assembly 8. The baffle ring base light hole 2404 is used for connecting the large-end spatter baffle ring 20. The large end of the step pin 22 is assembled into the baffle ring base light hole 2404 through interference fit, and the up and down movement of the large-end spatter baffle ring 20 is realized by cooperating the step pin 22 with the spring 23. Figure 12 As shown in FIG. 12, the baffle ring base 24 includes a limiting boss 2401, a pin hole 2402, a baffle ring threaded hole 2403 and a baffle ring base light hole 2404. The pin hole 2402 is used for positioning the baffle ring base 24 and the base assembly 8. The baffle ring threaded hole 2403 is used for connecting with the base assembly 8. The baffle ring base light hole 2404 is used for connecting the large-end spatter baffle ring 20. The large end of the step pin 22 is assembled into the baffle ring base light hole 2404 through interference fit, and the up and down movement of the large-end spatter baffle ring 20 is realized by cooperating the step pin 22 with the spring 23.

[0087] Figure 13 As shown in FIG. 13, the baffle ring base 24 includes a limiting boss 2401, a pin hole 2402, a baffle ring threaded hole 2403 and a baffle ring base light hole 2404. The pin hole 2402 is used for positioning the baffle ring base 24 and the base assembly 8. The baffle ring threaded hole 2403 is used for connecting with the base assembly 8. The baffle ring base light hole 2404 is used for connecting the large-end spatter baffle ring 20. The large end of the step pin 22 is assembled into the baffle ring base light hole 2404 through interference fit, and the up and down movement of the large-end spatter baffle ring 20 is realized by cooperating the step pin 22 with the spring 23. Figure 14 ​​​As shown, the cover plate 2 includes cover plate weight-reducing holes 201, a cover plate center hole 202, a cover plate inner cavity 203, and a cover plate outer circle 204.

[0088] As shown in Figure 15 and Figure 16 , the small-end splashing baffle ring 14 includes a small-end splashing baffle ring center hole 1401, a small-end splashing baffle ring weight-reducing hole 1403, a small-end splashing baffle ring threaded hole 1404, and a transmission cylinder center 1405. The small-end splashing baffle ring weight-reducing hole 1403 is used for weight reduction. The transmission cylinder center 1405 is used for penetrating into the center column 18.

[0089] As shown in Figure 17 , the arc-shaped transmission rod 10 includes a shaft pin 1001 and a transmission rod hole 1002.

[0090] As shown in Figure 18 , Figure 19 and Figure 20 , the transmission cylinder 12 includes a transmission cylinder threaded hole 1201, a mounting window 1202, a transmission cylinder hole 1203, a transmission cylinder extension ring 1204, a transmission cylinder barrel 1205, and a bearing ball 1206. The transmission cylinder extension ring 1204 is used to provide space for the position and rotation of the arc-shaped transmission rod 10.

[0091] In one embodiment, the first welding seam splashing shielding assembly 3 is connected by the following way:

[0092] Step one, fix multiple groups of guide rails 15 to the small-end splashing baffle ring threaded holes 1404 at the bottom of the small-end splashing baffle ring 14 through guide rail fastening screws 19, as shown in Figure 16 , divide the small-end splashing baffle ring threaded holes 1404 into several groups and arrange them evenly at the bottom of the small-end splashing baffle ring 14;

[0093] Step two, install the opposite side of the slide way plane 1602 of the slide way 16 (as shown in Figure 9 ) to the opposite side of the splashing baffle support body 1703 of the splashing baffle 17 (as shown in Figure 7 ), ensure that the axis of the slide way 16 is consistent with the inner cavity axis of the splashing baffle 17 and the edges are aligned, then complete the installation by spot welding at the edges. Using spot welding connection can ensure that the splashing baffle 17 can be disassembled and replaced after deformation or the splashing transition is taken down for polishing, avoiding the situation that the screw connection method cannot be taken down after deformation. Secondly, the screw shaft 11 penetrates through the transmission rod hole 1002 of the arc-shaped transmission rod 10, installs the arc-shaped transmission rod 10 to the threaded hole of the splashing baffle 17, and finally, install the remaining arc-shaped transmission rods 10 in the same way;

[0094] Step three, install the transmission cylinder 12 (as shown in Figure 18(As shown) Take it out separately (i.e., without handle 9), and put the bottom of the transmission cylinder 12 into the top of the center column 18 until the bearing ball 1206 contacts the center column step 1802. Next, put the small end splash retainer ring 14 (without the large screw 13) into the top of the center column 18 through the center hole 1401 of the small end splash retainer ring, and then put it into the outer circle of the transmission cylinder 12.

[0095] Step 4: Rotate the transmission cylinder 12, center column 18, and small end splash retaining ring 14 appropriately to ensure that the center column threaded hole 1801 of the center column 18, the installation window 1202 of the transmission cylinder 12, and the threaded hole of the small end splash retaining ring 14 are on the same axis. Then, use a large screw 13 to screw into the threaded hole of the small end splash retaining ring 14, pass through the installation window 1202 of the transmission cylinder 12, and finally screw into the center column threaded hole 1801 of the center column 18. Install the two large screws 13 symmetrically, and then install the two handles 9 onto the transmission cylinder threaded hole 1201 on the transmission cylinder 12.

[0096] Step 5, as follows Figure 3 As shown, remove the pin 1001 of the arc-shaped transmission rod 10, and install the slide rail 16 in the component with spatter baffle 17 and the guide rail 15 in the component with small-end spatter baffle ring 14, ensuring that the guide rail protrusion 1501 slides into the slide rail recess 1601. The cylindrical angle of the mating part of the guide rail 15 and the slide rail 16 is greater than 200° to ensure that the slide rail 16 does not derail during sliding. Then, adjust the movable end of the arc-shaped transmission rod 10 to ensure that the hole is aligned with the appropriate transmission cylinder hole 1203 on the transmission cylinder, and then insert the pin 1001. Insert the limiting pins into the holes at both ends of the pin 1001 to complete the installation. Install the remaining sets in the same way to complete the installation of the first weld spatter shielding assembly 3.

[0097] In one embodiment, the second weld spatter shielding assembly 7 is connected in the following manner:

[0098] Step 1: Weld the limiting pieces 21 evenly onto the large end splash guard ring 20, with the end of the limiting piece 21 with the square hole facing downwards and the other side of the limiting piece 21 aligned with the bottom end of the annular groove of the large end splash guard ring 20. At the same time, ensure that the pre-machined angular direction is aligned during welding.

[0099] Step 2: Insert the large ends of multiple stepped pins 22 into the retaining ring base light holes 2404 of the retaining ring base 24. Through interference fit, they can be installed into the holes by cold fitting or forced hammering. Then, put multiple springs 23 into the small ends of the stepped pins 22. At this time, the springs 23 are just located in the annular groove formed by the stepped pins 22 and the retaining ring base light holes 2404 of the retaining ring base 24.

[0100] Step three, install the large end splash ring 20 to the ring base 24 as a whole, align the corresponding small holes, and symmetrically apply force downward at the position of the welding limit piece 21. The limit piece 21 is forced, deformed and expanded under the action of the limit boss 2401. When the limit boss 2401 completely enters the square hole of the limit piece 21, the limit piece 21 snaps back to buckle the bottom of the limit boss 2401 to complete the installation. The upper end of the limit boss 2401 is smoothly transitioned with the outer circle of the ring base 24, and the lower end of the limit boss 2401 forms an angle of about 80° with the outer circle of the ring base 24, which ensures that the limit piece 21 cannot slide out.

[0101] As shown in Figure 21 The base assembly includes a base body and a pressing plate fixing element. The base body includes a first positioning circle 801, a second positioning circle 802, a disassembly groove 803, a pin hole 804, a first threaded hole 805, a through groove 806, a second threaded hole 807, a base center hole 808, a third threaded hole 809, and a fourth threaded hole 810. The pressing plate fixing element includes a pressing plate nut 25, a pressing plate 26, a center nut 27, and a stud 28. The stud 28 is sleeved with the pressing plate 26, and the pressing plate nut 25 fixes the pressing plate 26 on the base body through the stud 28.

[0102] The first positioning circle 801 is a positioning circle corresponding to the fixture of the outer circle of the third welding part 31, which ensures that the third welding part 31 is concentric with the fixture. The second positioning circle 802 is a fixture corresponding positioning element of the bottom end outer circle of the second welding part 30, which ensures that the second welding part 30 is concentric with the fixture. The disassembly groove is used for deepening the tool to remove the nozzle support structure type part (after the nozzle support structure type part is welded, the positioning circle is too tight due to the deformation of the part). There are two places. The pin hole 804 is uniformly distributed in two places. The first threaded hole 805 is a threaded hole of the second welding seam splash shielding assembly 7, which is uniformly distributed in six places. The through groove 806 is a through groove for connecting the machine tool, which is convenient for disassembling the part after welding by cooperating with the two disassembly grooves 803. The second threaded hole 807 is uniformly distributed in three places, which is used for installing a lifting ring and lifting the part. The base center hole 808 is used for positioning the bottom of the center column 18 to ensure concentricity. The third threaded hole 809 and the fourth threaded hole 810 are threaded holes, which are used for connecting the center column 18 and the base assembly 8.

[0103] In one embodiment, the base assembly 8 is connected by the following way:

[0104] First, screw the center nut 27 into the appropriate position of the stud 28, then screw one end of the stud 28 into the fourth threaded hole 810 of the base, then sleeve the pressing plate 26 into the stud 28, and finally screw the pressing plate nut 25 into the other end of the stud 28 to complete the installation. The remaining groups are installed in the same way.

[0105] The use of the shielding device of the nozzle support structure type part of the present application and the welding method:

[0106] Step one, the second welding parts 30 and the third welding parts 31 are fixed with the base assembly 8 respectively, and the first welding parts 29 are installed into the shielding device;

[0107] Specifically, the shielding device top compression nut 1 and the cover plate 2 are removed, the compression plate nut 25 is loosened, the compression plate 26 is rotated, the nozzle support structure parts (welded finished parts) are avoided from interfering with the compression plate 26, and then the third welding parts 31 are installed into the shielding device, the outer circle of the third welding parts 31 is matched with the first positioning circle 801, the bottom is matched, the second welding parts 30 are installed into the shielding device, the bottom inner circle of the second welding parts 30 is matched with the second positioning circle 802, and the matching position is ensured to be good. Then the first welding parts 29 are installed into the shielding device, and the position is adjusted to match the top of the second welding parts 30.

[0108] Step two, the handle 9 is used to fix the splashing baffle 17 of the first welding seam splashing shielding assembly 3;

[0109] The handle 9 is rotated to drive the transmission cylinder 12 to move the arc-shaped transmission rod 10, the arc-shaped transmission rod 10 drives a plurality of groups of splashing baffles 17 to move on the slide 16, the splashing baffles 17 are expanded along the radial direction, and the outer periphery of the splashing baffles 17 is abutted with the inner diameter of the second welding parts 30. The handle 9 is tightened, and the end of the handle 9 is abutted against the center column 18.

[0110] Specifically, the handle 9 is rotated around the center of the shielding device, the transmission cylinder 12 is manually driven, the arc-shaped transmission rod 10 is driven, and then the splashing baffles 17 are moved on the slide 16. The splashing baffles 17 begin to expand outward, until the outer circle reaches the inside of the second welding parts 30. Finally, the handle 9 is tightened, the end of the handle 9 is abutted against the outer circle of the center column 18, and the fixing of the splashing baffles 17 is completed. The small end splashing baffle ring 14 is fixedly connected with the center column 18 as a whole through the large screw 13 throughout the process. During the rotation of the handle 9, the large screw 13 moves in the installation window 1202 of the transmission cylinder 12 to prevent interference.

[0111] Step three, the cover plate 2 is installed into the shielding device, the inner circle of the top of the first welding parts 29 is matched with the cover plate outer circle 204 of the cover plate 2, and the cover plate center hole 202 is concentric with the center column 18;

[0112] Specifically, the cover plate 2 is installed into the shielding device, the inner circle of the top of the first welding parts 29 is matched with the cover plate outer circle 204 of the cover plate 2, and the cover plate 2 is concentric with the cover plate 2. The cover plate center hole 202 of the cover plate 2 is matched with the center column 18 to ensure concentricity. The cover plate weight reduction hole 201 is designed for weight reduction, and the cover plate 2 avoids interference with the handle 9 through the cover plate inner cavity 203.

[0113] Step four, after rotating the pressing plate 26 and positioning the shielding device with the nozzle support structure parts using the pressing plate nut 25, the top pressing nut 1 is used to fix;

[0114] Specifically, the top pressing nut 1 is screwed into the top of the shielding device, the pressing plate 26 is rotated, and the pressing plate nut 25 is tightened, and the nozzle support structure part clamping is completed.

[0115] Step five, hoist the shielding device to the machine tool, and install the pressing plate of the machine tool into the base assembly 8;

[0116] Specifically, as shown in Figure 22 , then install the lifting ring into the second threaded hole 807, hoist the shielding device to the machine tool, and install the pressing plate of the machine tool into the through slot 806.

[0117] Step six, weld the first welding part 32 of the first welding part 29 and the second welding part 30, and the second welding part 33 of the second welding part 30 and the third welding part 31, respectively;

[0118] Specifically, after installation is completed, welding is performed, and the electron beam welding position is shown in Figure 23 During the welding process, the first welding part 32, the spatter baffle 17 blocks the spatter from sticking to the inside of the second welding part 30, and the second welding part 33, due to the elastic action of the large-end spatter baffle ring 20 tightly adhering to the inside of the second welding part 30, blocks the spatter from sticking to the inside of the second welding part 30.

[0119] Step seven, disassemble the welded nozzle support structure part from the shielding device, complete the welding of the first welding part 29 and the second welding part 30, and the second welding part 30 and the third welding part 31;

[0120] Specifically, loosen the top pressing nut 1, remove the cover plate 2, loosen the large screw 13, and rotate the handle 9 to make the spatter baffle 17 retract; loosen the top pressing nut 1, rotate the pressing plate 26, and use a tool to remove the pressing plate of the machine tool from the disassembly slot 803, and the nozzle support structure part can be disassembled, and the welding of the nozzle support structure part is completed.

[0121] The first welding spatter shielding mechanism component of the embodiment of the present application is provided with a spatter baffle and a small-end spatter baffle ring, the small-end spatter baffle ring is used for absorbing the residual energy of the electron beam welding penetration, preventing the fixture central shaft from being burned or a secondary welding seam from being generated in the non-welding area of the part. At the same time, the groove type structure of the small-end spatter baffle ring can shield a small part of the spatter of the first welding position. The spatter baffle can effectively shield the spatter at the first welding position, and the radial expansion of the spatter baffle compensates for the shielding blind area of the small-end spatter baffle ring, so that 100% spatter shielding of the one side of the casting at the first welding position is realized, and after the welding is completed, the subassembly can be easily disassembled. The second welding spatter shielding mechanism component solves the problem of spatter shielding when the back of the second welding position is an annular groove.

[0122] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. Especially, for the method embodiment described later, since it is corresponding to the system, the description is relatively simple, and the related parts can be referred to the part of the system embodiment.

[0123] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A shielding device for a nozzle support structure component, characterized in that, include: The nozzle support structure includes a first welding part (29), a second welding part (30) and a third welding part (31), wherein the parts to be welded are the first welding part (32) where the first welding part (29) contacts the second welding part (30) and the second welding part (30) where the third welding part (31) contacts the second welding part (33). The bottoms of the base assembly (8), the second welding part (30), and the third welding part (31) are all fixed to the base assembly (8); The first weld spatter shielding assembly (3) includes a central column (18), which is located on the central axis of the first weld spatter shielding assembly (3). The first weld spatter shielding assembly (3) is connected to the base assembly (8) through the central column (18). The first weld spatter shielding assembly (3) is located at the first welding position (32). The positioning component and the second weld spatter shielding component (7) are positioned and connected to the base component (8) through the positioning component. The second weld spatter shielding component (7) is disposed at the second welding position (33). The first weld spatter shielding assembly (3) also includes: The small-end splash retaining ring (14), the transmission cylinder (12) and the large screw (13) are provided with a groove structure on the outer periphery of the small-end splash retaining ring (14), the groove structure facing the first welding part (32), the small-end splash retaining ring (14) and the transmission cylinder (12) are connected in sequence, and the small-end splash retaining ring (14) is connected to the central column (18) through the large screw (13); The first weld spatter shielding assembly (3) also includes: Handle (9), arc-shaped transmission rod (10) and splash baffle (17). The handle (9) is connected to the transmission cylinder (12). One end of the arc-shaped transmission rod (10) is fixed on the transmission cylinder (12), and the other end of the arc-shaped transmission rod (10) is fixed to the splash baffle (17). The guide rail (15) and the slide rail (16) are fixed on the small end splash baffle (14) and the slide rail (16) is fixed on the splash baffle (17). The guide rail (15) can slide within the range of the slide rail (16). The second weld spatter shielding assembly (7) includes: Large-end splash guard ring (20) and limiting piece (21), the limiting piece (21) is welded to the large-end splash guard ring (20); Step pin (22), retaining ring base (24) and spring (23), one end of step pin (22) is connected to the spring (23), the other end of step pin (22) is fitted into the spring (23), the large end splash retaining ring (20) is fixed to the retaining ring base (24) through the limiting piece (21), so that one end of spring (23) abuts against the large end splash retaining ring (20); A large-end spatter retaining ring (20) is provided at the second welding position (33); The positioning component includes: The top clamping nut (1) and the cover plate (2) are fitted on the top of the central column (18), and the outer wall of the cover plate (2) abuts against the first welded part (29). The nozzle support structure part is fastened to the shielding device by the top clamping nut (1). The second weld spatter shielding assembly (7) is connected to the base assembly (8) via the locating pin (5) and screw (6); The base assembly (8) includes: Base body and pressure plate fixing components; The base body includes: a first positioning circle (801), a second positioning circle (802), a first threaded hole (805), and a base center hole (808). The base center hole (808) is located at the center of the base body. The second positioning circle (802) and the first positioning circle (801) are both annular protrusions on the bottom plate of the base body. The first threaded holes (805) are arranged at radial intervals along the bottom plate. The pressure plate fixing element includes: pressure plate nut (25), pressure plate (26), center nut (27) and stud (28). The stud (28) is sleeved with the pressure plate (26), and the pressure plate nut (25) fixes the pressure plate (26) to the base assembly (8) through the stud (28). The third welding part (31) abuts against the first positioning circle (801), and the outer wall of the third welding part (31) is fixed to the base assembly (8) by the pressure plate element; The second welded part (30) abuts against the second positioning circle (802); The second weld spatter shielding assembly (7) is fixed to the base assembly (8) through the first threaded hole (805); The center post (18) is inserted into the center hole (808) of the base, and the first weld spatter shielding assembly (3) is positioned and connected to the base assembly (8) through the center post (18) and the center hole (808).

2. The shielding device for nozzle support structure parts according to claim 1, characterized in that, The shielding device also includes a central column fixing screw (4), and the first weld spatter shielding assembly (3) is positioned and connected to the base assembly (8) through the central column fixing screw (4).

3. A method of using the shielding device according to any one of claims 1 to 2, characterized in that, The shielding device is used in the welding process of the nozzle support structure parts.

4. The method of using the shielding device according to claim 3, characterized in that, include: The second welding part (30) and the third welding part (31) are fixed on the base assembly (8) respectively, and the first welding part (29) is installed into the shielding device. Use the handle (9) to secure the spatter baffle (17) of the first weld spatter shielding assembly (3); The cover plate (2) is installed into the shielding device, so that the inner circle of the first welded part (29) fits with the outer circle (204) of the cover plate, and the central hole (202) of the cover plate is concentric with the central column (18); After rotating the pressure plate (26) and using the pressure plate nut (25) to position the base assembly (8) of the shielding device with the nozzle support structure, fix it with the top clamping nut (1); The shielding device is hoisted onto the machine tool, and the pressure plate of the machine tool is installed into the base assembly (8). Welding is performed on the first welding part (32) and the second welding part (33) respectively; Remove the welded nozzle support structure from the shielding device.

5. The method of using the shielding device according to claim 4, characterized in that, Secure the spatter shield (17) of the first weld spatter shielding assembly (3) using the handle (9), including: Turning the handle (9) drives the transmission cylinder (12) to move the arc-shaped transmission rod (10); The arc-shaped transmission rod (10) drives multiple sets of splash baffles (17) to move on the slide (16), causing the splash baffles (17) to expand radially until the outer periphery of the splash baffles (17) abuts against the inner diameter of the second welded part (30); Tighten the handle (9) so that the end of the handle (9) abuts against the center post (18).

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