A device and method for preparing high-temperature alloy sealing rings from seamless tube blanks

Abstract

The present invention relates to the technical field of plastic sealing ring processing, and specifically to a device and method for preparing a high-temperature alloy sealing ring from a seamless tube blank. The device includes a heating and cutting machine, a base, and a hot extrusion forming mechanism, a tube blank self-rotating feeder, and a tube blank axial feeder, which are sequentially arranged on the base, wherein the tube blank self-rotating feeder is used to clamp the seamless tube blank and can drive the seamless tube blank to rotate circumferentially, and the tube blank axial feeder is used to axially drive and feed at the non-processing end of the seamless tube blank; the hot extrusion forming mechanism is used to perform hot extrusion forming on the processing end of the seamless tube blank, and the heating and cutting machine is used to heat the front end of the seamless tube blank and cut the hot extruded high-temperature alloy sealing ring with a W-shaped cross section. The present invention realizes the process of preparing a high-temperature alloy sealing ring with a W-shaped cross section, and the forming process is controllable and has high forming accuracy. It meets the process requirements of the complex cross-sectional shape of the W-shaped sealing ring and improves the reliability of the sealing ring and the service performance of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of plastic sealing ring processing, and in particular to a device and method for preparing a high-temperature alloy sealing ring from a seamless tube blank. Background Art

[0002] High temperature alloy complex cross-section sealing rings are the most widely used sealing structure in the industry, and have been widely used in aviation, aerospace, petroleum, nuclear power and other industrial fields. High temperature alloy complex cross-section sealing rings include O-shaped, W-shaped, C-shaped, U-shaped, Ω-shaped and other complex cross-section shapes, among which the W-shaped cross-section sealing ring has good resilience, strong vibration absorption ability, large deformation range, good high vibration tracking, high vibration absorption ability, long life and good wear resistance, etc. It is especially suitable for working in harsh environments such as high temperature, medium pressure, vibration and strong corrosive media in aviation and aerospace equipment.

[0003] At present, the forming section of the complex cross-section sealing ring of high-temperature alloy mainly adopts three processes: hydraulic bulging, spinning and rolling forming. The basic outer contour of the W-type high-temperature alloy sealing ring is a ring part. Because its cross-sectional shape is similar to the letter W, it has small characteristic dimensions (such as the minimum radius of the part is 0.7mm) and large relative dimensions (such as the ratio of the outer diameter to the maximum height of the part D / H = 134), complex cross-sectional shape, ultra-thin wall thickness (such as 0.25mm for the part) and other typical characteristics, and the lip is concave, and the precision requirement is high. The above characteristics increase the difficulty of forming such parts. Due to the complex cross-sectional shape, small wall thickness, and large diameter of the W-shaped sealing ring, it is difficult for traditional spinning molds to meet its forming requirements. At the same time, due to its thin wall (0.1-0.5mm) and complex cross-section (its cross-section has small diameter curling corners and closing straight line segments), it is difficult to use traditional hydraulic bulging and rolling for forming, which brings great challenges to the precision plastic forming process. In order to improve the reliability of the sealing ring and the service performance of the engine, it is urgent to develop the forming technology of the W-section sealing ring. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a device and method for preparing a high-temperature alloy sealing ring from a seamless tube billet, so as to solve the problem that traditional hydraulic bulging and roll forming are difficult to meet the forming process requirements of W-section sealing rings.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] On one hand, the present invention provides a device for preparing a high-temperature alloy sealing ring from a seamless tube billet, comprising a heating and cutting machine, a base, and a hot extrusion forming mechanism, a tube billet self-rotation feeder and a tube billet axial feeder which are sequentially arranged on the base, wherein the tube billet self-rotation feeder is used to clamp the seamless tube billet and can drive the seamless tube billet to rotate circumferentially, and the tube billet axial feeder is used to axially drive and feed the non-processing end of the seamless tube billet; the hot extrusion forming mechanism is used to perform hot extrusion forming on the processing end of the seamless tube billet, and the heating and cutting machine is used to heat the front end of the seamless tube billet and cut the hot extruded high-temperature alloy sealing ring with a W-shaped cross section.

[0007] In one possible implementation, the hot extrusion forming mechanism includes an internal die assembly and an external die assembly, wherein the internal die assembly is formed and positioned on the inner side of the processing end of the seamless tube blank; the external die assembly is intermittently hot forged on the outer side of the processing end of the seamless tube blank, and is performed alternately with the circumferential rotation of the seamless tube blank until it is forged to the forming position, thereby completing the hot extrusion forming of the high-temperature alloy sealing ring.

[0008] In a possible implementation, the internal mold assembly includes an internal axial non-processing end drive forming mold, an internal middle drive forming mold, and an internal axial processing end drive forming mold;

[0009] The internal axial non-processing end drive forming die comprises an internal axial non-processing end drive unit and an internal axial non-processing end die connected to the internal axial non-processing end drive unit;

[0010] The internal middle driving forming die includes an internal middle driving unit and an internal middle die connected to the internal middle driving unit;

[0011] The internal axial processing end driving forming die comprises an internal axial processing end driving unit and an internal axial processing end die connected to the internal axial processing end driving unit;

[0012] The internal axial non-processing end die, the internal middle die and the internal axial processing end die are arranged in sequence from the inside to the outside along the axial direction of the seamless tube blank, and the shape of the forging and extrusion surfaces of the internal axial non-processing end die, the internal middle die and the internal axial processing end die after being assembled is the same as the inner wall shape of the high-temperature alloy sealing ring.

[0013] In a possible implementation, the external mold assembly includes an external axial non-processing end drive forming mold, an external middle drive forming mold, and an external axial processing end drive forming mold;

[0014] The external axial non-processing end drive forming die comprises an external axial non-processing end drive unit and an external axial non-processing end die connected to the external axial non-processing end drive unit;

[0015] The external middle driving forming die includes an external middle driving unit and an external middle die connected to the external middle driving unit;

[0016] The external axial processing end driving forming die comprises an external axial processing end driving unit and an external axial processing end die connected to the external axial processing end driving unit;

[0017] The external axial non-processing end die, the external middle die and the external axial processing end die are arranged in sequence from the inside to the outside along the axial direction of the seamless tube blank, and correspond one to one with the internal axial non-processing end die, the internal middle die and the internal axial processing end die; the shape of the forging and extrusion surfaces of the external axial non-processing end die, the external middle die and the external axial processing end die after being assembled is the same as the outer wall shape of the high-temperature alloy sealing ring.

[0018] In one possible implementation, each driving unit in the inner mold assembly and the outer mold assembly has the ability to move axially and radially relative to the seamless tube blank and the ability to couple axially and radially.

[0019] In a possible implementation, upper and lower edges of the forging and extrusion surfaces of each die in the internal die assembly and the external die assembly are provided with rotary extrusion guide fillets.

[0020] In one possible implementation, the tube blank self-rotating feeder includes a large tube, a small tube, a rotary drive mechanism and a radial profiling fixture, wherein the large tube is fixed on the base, the small tube is rotatably installed on the inner side of the large tube, the rotary drive mechanism is arranged on the large tube, and the output end is connected to the small tube, and the rotary drive mechanism is used to drive the small tube to rotate; the radial profiling fixture is coaxially installed at the end of the small tube, and the seamless tube blank is inserted in the small tube and clamped by the radial profiling fixture.

[0021] In a possible implementation, the radial profiling fixture includes a radial profiling chuck I and a radial profiling chuck II that can be opened and closed radially, and a gap is formed between corresponding ends of the radial profiling chuck I and the radial profiling chuck II after they are closed.

[0022] In one possible implementation, the tube blank axial feeder includes a column, a profiling chuck and an axial drive mechanism, wherein the column and the base can be slidably connected along the axial direction of the seamless tube blank, the axial drive mechanism is arranged on the base, and the output end is connected to the column, and the axial drive mechanism is used to drive the column to move; the profiling chuck is arranged on the column to clamp the non-processing end of the seamless tube blank.

[0023] Another aspect of the present invention provides a method for preparing a high-temperature alloy sealing ring device using the seamless tube blank as described above, comprising the following steps:

[0024] Step S1: The seamless tube blank is mounted on the tube blank self-rotating feeder, the tube blank axial feeder clamps the non-processing end of the seamless tube blank, and the tube blank axial feeder axially feeds so that the processing end of the seamless tube blank extends forward to a set process length;

[0025] Step S2: the tube blank self-rotating feeder clamps the seamless tube blank, and the tube blank axial feeder releases the non-processing end of the seamless tube blank;

[0026] Step S3: the internal axial non-processing end mold, the internal middle mold and the internal axial processing end mold are moved to the inner side of the processing end of the seamless tube blank to set the process position;

[0027] Step S4: establishing a non-oxidizing atmosphere;

[0028] Step S5: heating the processing end of the seamless tube blank to the forging process temperature by a heating and cutting machine;

[0029] Step S6: the external axial non-processing end die and the external axial processing end die perform axial and radial coupling forging in a process step according to a set hot extrusion path;

[0030] Step S7: the tube blank self-rotating feeder drives the seamless tube blank to rotate for one process step;

[0031] Step S8: Repeating steps S6 and S7 until the axial and radial coupling of the external axial non-processing end die and the external axial processing end die are forged to a forming position;

[0032] Step S9: radial forging of the outer middle die in one process step;

[0033] Step S10: the tube blank self-rotating feeder drives the seamless tube blank to rotate for one process step;

[0034] Step S11: Repeat steps S9 and S10 until the outer middle die is radially forged to a forming position;

[0035] Step S12: the tube blank self-rotating feeder drives the seamless tube blank to rotate and smooth out the forging and extrusion marks;

[0036] Step S13: Switch the non-oxidizing atmosphere to an air environment;

[0037] Step S14: Cut off the formed part by heating and cutting machine to obtain a high-temperature alloy sealing ring with a W-shaped cross section.

[0038] The advantages and beneficial effects of the present invention are as follows: a device for preparing a high-temperature alloy sealing ring from a seamless tube blank provided by the present invention realizes the process of preparing a high-temperature alloy sealing ring with a W-shaped cross-section from a seamless tube blank through the coordinated action of a hot extrusion forming mechanism and a tube blank self-rotating feeder. The forming process is controllable and has high forming accuracy, which meets the process requirements of the complex cross-sectional shape of the W-shaped sealing ring and improves the reliability of the sealing ring and the service performance of the engine.

[0039] The radial and axial coupling forging adopted by the external die assembly of the present invention is a three-way pressure forming, which is helpful for grain refinement compared with the traditional hot extrusion process. The radial profiling fixture of the tube blank self-rotating feeder adopts a double-approach semi-cylindrical structure, which is suitable for clamping thin-walled and weak-rigidity seamless tube blanks to avoid damaging the seamless tube blanks.

[0040] The six dies in the inner and outer die assemblies of the present invention all have rotary extrusion guide fillets. In the rotary hot extrusion forming process, compared with the conventional room temperature spinning, there is a technical advantage of no springback. The high-temperature alloy sealing ring can be shaped to improve the accuracy of shape and position errors.

[0041] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0042] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 This is one of the axonometric views of a device for preparing a high-temperature alloy sealing ring from a seamless tube blank according to the present invention;

[0045] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0046] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0047] Figure 4 This is the second isometric view of a device for preparing a high-temperature alloy sealing ring from a seamless tube blank according to the present invention;

[0048] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0049] Figure 6 It is a structural schematic diagram of the external mold assembly in the present invention;

[0050] Figure 7 This is the third isometric view of a device for preparing a high-temperature alloy sealing ring from a seamless tube blank according to the present invention;

[0051] Figure 8 It is a schematic diagram of the hot extrusion process of the inner and outer die components in the present invention;

[0052] Fig. 9 This is a schematic diagram of hot extrusion forming of the inner and outer die components in the present invention;

[0053] Fig.10 It is a partial enlarged view of the internal axial non-processing end mold in the present invention;

[0054] Fig.11 It is a partial enlarged view of the inner middle mold in the present invention;

[0055] Fig.12 It is an axial view of the outer middle mold in the present invention;

[0056] Fig.13 A top view of a W-shaped high-temperature alloy sealing ring obtained in an embodiment of the present invention;

[0057] Fig.14 for Fig.13 Middle FF section view;

[0058] Fig.15 for Fig.14 A partial enlarged view of point D in the middle.

[0059] In the figure: 1-high temperature alloy sealing ring, 101-first axial concave annular scanning space, 102-angle between the tangent of the outer end point of the first concave curve and the radial direction, 104-angle between the tangent of the outer end point of the second concave curve and the radial direction, 103-second axial concave annular scanning space, 2-seamless tube, 3-base, 4-tube axial feeder, 401-upper profiling chuck, 402-lower profiling chuck, 403-column, 5-tube self-rotating feeder, 501-large cylinder, 502-small cylinder, 503-radial profiling chuck I, 504-radial profiling chuck II, 505-gap, 6-heating and Cutting machine, 7-internal axial non-processing end drive forming die, 701-internal axial non-processing end die, 702-non-processing end die fit forging extrusion surface, 703-fitting surface between non-processing end dies, 704-non-processing end die rotation extrusion guide fillet, 8-internal middle drive forming die, 801-internal middle die, 802-internal middle die fit forging extrusion surface, 803-fitting surface between internal middle dies, 804-internal middle die rotation extrusion guide fillet, 9-internal axial processing end drive forming die, 901-internal axial processing end die, 902-internal axial plus Working end die fits forging extrusion surface, 903-fitting surface between internal axial processing end dies, 904-rotating extrusion guide fillet of internal axial processing end die, 10-external axial non-processing end drive forming die, 1001-external axial non-processing end die, 1002-external axial non-processing end die fits forging extrusion surface, 1003-fitting surface between external axial non-processing end dies, 1004-rotating extrusion guide fillet of external axial non-processing end die, 1005-external axial non-processing end die driving unit, 11-external middle drive forming die, 1101-external middle die, 110 2-external middle die fitting forging extrusion surface, 1103-fitting surface between external middle dies, 1104-external middle die rotation extrusion guide radius, 1105-external middle die driving unit, 12-external axial processing end driving forming die, 1201-external axial processing end die, 1202-external axial processing end die fitting forging extrusion surface, 1203-fitting surface between external axial processing end dies, 1204-external axial processing end die rotation extrusion guide radius, 1205-external axial processing end die driving unit, 13-internal die assembly, 14 is the external die assembly. DETAILED DESCRIPTION

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0062] An embodiment of the present invention provides a device for preparing a high-temperature alloy sealing ring from a seamless tube billet, so as to realize the forming of a W-shaped sealing ring with a complex cross-sectional shape and improve the forming accuracy. Figures 1 to 15 As shown, the device for preparing a high-temperature alloy sealing ring from a seamless tube billet comprises a heating and cutting machine 6, a base 3, and a hot extrusion forming mechanism, a tube billet self-rotation feeder 5 and a tube billet axial feeder 4 which are sequentially arranged on the base 3, wherein the tube billet self-rotation feeder 5 is used to clamp the seamless tube billet 2 and can drive the seamless tube billet 2 to rotate circumferentially, and the tube billet axial feeder 4 is used to axially drive and feed the non-processing end of the seamless tube billet 2; the hot extrusion forming mechanism is used to perform hot extrusion forming on the processing end of the seamless tube billet 2, and the heating and cutting machine 6 is used to heat the front end of the seamless tube billet 2 and cut the hot extruded high-temperature alloy sealing ring 1 with a W-shaped cross section.

[0063] See also Figure 1 As shown, in the embodiment of the present invention, the hot extrusion forming mechanism includes an internal die assembly 13 and an external die assembly 14. The internal die assembly 13 is formed and positioned on the inner side of the processing end of the seamless tube blank 2; the external die assembly 14 is intermittently hot forging and circumferentially rotating the seamless tube blank 2 on the outer side of the processing end of the seamless tube blank 2, alternating until the forging reaches the forming position, thereby completing the hot extrusion forming of the high-temperature alloy sealing ring 1.

[0064] See also Figures 2 to 6As shown, in an embodiment of the present invention, the internal mold assembly 13 includes an internal axial non-processing end drive forming mold 7, an internal middle drive forming mold 8 and an internal axial processing end drive forming mold 8, wherein the internal axial non-processing end drive forming mold 7 includes an internal axial non-processing end drive unit and an internal axial non-processing end mold 701 connected to the internal axial non-processing end drive unit; the internal middle drive forming mold 8 includes an internal middle drive unit and an internal middle mold 801 connected to the internal middle drive unit; the internal axial processing end drive forming mold 9 includes an internal axial processing end drive unit and an internal axial processing end mold 901 connected to the internal axial processing end drive unit; the internal axial non-processing end mold 701, the internal middle mold 801 and the internal axial processing end mold 901 are arranged in sequence from inside to outside along the axial direction of the seamless tube blank 2, and the shape of the forging extrusion surfaces of the internal axial non-processing end mold 701, the internal middle mold 801 and the internal axial processing end mold 901 after splicing is the same as the inner wall shape of the high-temperature alloy sealing ring 1.

[0065] See also Figures 2 to 6 As shown, in the embodiment of the present invention, the external mold assembly 14 includes an external axial non-processing end drive forming mold 10, an external middle drive forming mold 11 and an external axial processing end drive forming mold 12; the external axial non-processing end drive forming mold 10 includes an external axial non-processing end drive unit 1005 and an external axial non-processing end mold 1001 connected to the external axial non-processing end drive unit 1005; the external middle drive forming mold 11 includes an external middle drive unit 1105 and an external middle mold 1101 connected to the external middle drive unit 1105; the external axial processing end drive forming mold 12 includes an external axial A processing end driving unit 1205 and an external axial processing end mold 1201 connected to the external axial processing end driving unit 1205; the external axial non-processing end mold 1001, the external middle mold 1101 and the external axial processing end mold 1201 are arranged in sequence from the inside to the outside along the axial direction of the seamless tube blank 2, and correspond one to one with the internal axial non-processing end mold 701, the internal middle mold 801 and the internal axial processing end mold 901; the shape of the forging and extrusion surfaces of the external axial non-processing end mold 1001, the external middle mold 1101 and the external axial processing end mold 1201 after being assembled is the same as the outer wall shape of the high-temperature alloy sealing ring 1.

[0066] Furthermore, the upper and lower edges of the forging and extrusion surfaces of each die in the internal die assembly 13 and the external die assembly 14 are provided with rotary extrusion guide fillets. Figure 3As shown, the front end of the internal axial processing end die 901 is the internal axial processing end die fitting forging extrusion surface 902, the inner side of the internal axial processing end die fitting forging extrusion surface 902 is the internal axial processing end die fitting surface 903, and the upper and lower edges of the internal axial processing end die fitting forging extrusion surface 902 are provided with internal axial processing end die rotation extrusion guide fillets 904. Fig.10 As shown, the front end of the internal axial non-processed end die 701 is a non-processed end die fitting forging extrusion surface 702, and the non-processed end die fitting forging extrusion surface 702 fits with the internal middle die 801 through the fitting surface 703 between the non-processed end dies; the upper and lower edges of the non-processed end die fitting forging extrusion surface 702 are provided with non-processed end die rotation extrusion guide fillets 704. Fig.11 As shown, the front end of the internal middle mold 801 is the internal middle mold fitting forging extrusion surface 802, the two sides of the internal middle mold fitting forging extrusion surface 802 are the internal middle mold fitting surfaces 803, and the upper and lower edges of the internal middle mold fitting forging extrusion surface 802 are provided with internal middle mold rotating extrusion guide fillets 804.

[0067] See also Figure 3 , Figure 8 , Fig. 9 As shown, in the embodiment of the present invention, the front end of the external axial non-processed end die 1001 is the external axial non-processed end die fitting forging extrusion surface 1002, the inner side of the external axial non-processed end die fitting forging extrusion surface 1002 is the external axial non-processed end die fitting surface 1003, and the upper and lower edges of the external axial non-processed end die fitting forging extrusion surface 1002 are provided with external axial non-processed end die rotation extrusion guide fillets 1004. The front end of the external middle die 1101 is provided with an external middle die fitting forging extrusion surface 1102, both sides of the external middle die fitting forging extrusion surface 1102 are the external middle die fitting surfaces 1103, and the upper and lower edges of the external middle die fitting forging extrusion surface 1102 are provided with external middle die rotation extrusion guide fillets 1104. The front end of the external axial processing end mold 1201 is the external axial processing end mold fitting forging extrusion surface 1202, the inner side of the external axial processing end mold fitting forging extrusion surface 1202 is the fitting surface 1203 between the external axial processing end molds, and the upper and lower edges of the external axial processing end mold fitting forging extrusion surface 1202 are provided with external axial processing end mold rotating extrusion guide radius 1204.

[0068] Specifically, the material of each mold in the internal mold assembly 13 and the external mold assembly 14 is preferably an ultra-high temperature alloy, such as a tungsten-molybdenum alloy with a non-oxidizing working temperature exceeding 2000°C. The internal and external mold assemblies are placed in a non-oxidizing atmosphere during operation. Each driving unit in the internal mold assembly 13 and the external mold assembly 14 has the ability to move axially and radially relative to the seamless tube 2 and the ability to couple axially and radially.

[0069] See also Figure 6 As shown, the external axial non-processing end mold 1001, the external middle mold 1101, and the external axial processing end mold 1201 respectively form a radial hydraulic servo drive pair with the corresponding external axial non-processing end mold drive unit 1005, the external middle mold drive unit 1105, and the external axial processing end mold drive unit 1205. The hydraulic servo drive pair is preferably composed of a hydraulic servo cylinder, a hydraulic servo system, a guide rail slider, etc. The external axial non-processing end mold drive unit 1005, the external middle mold drive unit 1105, and the external axial processing end mold drive unit 1205 form an axial hydraulic servo drive pair with the base 3. The principles of the three mold drive units of the internal mold assembly 13 are the same as those of the external mold assembly 14, and will not be repeated here. Each mold drive unit is a conventional design for radial forging and axial forging, and any two-dimensional linear moving module in the prior art that can achieve radial and axial movement can also be used.

[0070] See also Figure 4 As shown, in the embodiment of the present invention, the tube blank self-rotating feeder 5 includes a large tube 501, a small tube 502, a rotary drive mechanism and a radial profiling fixture, wherein the large tube 501 is fixed on the base 3, the small tube 502 is rotatably installed on the inner side of the large tube 501, the rotary drive mechanism is arranged on the large tube 501, and the output end is connected to the small tube 502, and the rotary drive mechanism is used to drive the small tube 502 to rotate; the radial profiling fixture is coaxially installed at the end of the small tube 502, and the seamless tube blank 2 is inserted into the small tube 502 and clamped by the radial profiling fixture.

[0071] Specifically, the radial profiling fixture includes a radial profiling chuck I503 and a radial profiling chuck II504 that can be opened and closed radially. After the radial profiling chuck I503 and the radial profiling chuck II504 are closed, there is a gap 505 between the corresponding ends, and the gap 505 is preferably 5 mm. Therefore, the clamping surface of the radial profiling chuck I503 and the radial profiling chuck II504 is close to but not half a cylinder, so that the tube blank self-rotating feeder 5 is suitable for clamping the thin-walled and weak-rigidity seamless tube blank 2. Further, the clamping surface of the radial profiling chuck I503 and the radial profiling chuck II504 can heat the seamless tube blank 2. The tube blank self-rotating feeder 5 clamps the middle part of the seamless tube blank 2 and can perform circumferential feeding. The tube blank self-rotating feeder 5 has at least three degrees of freedom, namely, the small cylinder 502 rotates relative to the large cylinder 501. The radial profiling chuck I 503 moves radially relative to the small cylinder 502, and the radial profiling chuck II 504 moves radially relative to the small cylinder 502. The opening and closing drive of the radial profiling chuck I 503 and the radial profiling chuck II 504 can adopt any mechanism capable of realizing linear drive in the prior art, which is not specifically limited here.

[0072] See also Figure 7As shown, in the embodiment of the present invention, the tube blank axial feeder 4 includes a column 403, a profiling chuck and an axial drive mechanism, wherein the column 403 and the base 3 can be connected slidably along the axial direction of the seamless tube blank 2, the axial drive mechanism is arranged on the base 3, and the output end is connected to the column 403, and the axial drive mechanism is used to drive the column 403 to move; the profiling chuck is arranged on the column 403, and is used to clamp the non-processing end of the seamless tube blank 2. The tube blank axial feeder 4 completes the clamping and axial feeding of the seamless tube blank 2, and the tube blank axial feeder 4 has at least three degrees of freedom, namely, the column 403 moves relative to the base 3 in the tube length direction, the upper profiling chuck 401 moves up and down relative to the column 403, and the lower profiling chuck 402 moves up and down relative to the column 403. Specifically, the axial drive mechanism can adopt a screw nut mechanism, or any mechanism in the prior art that can realize linear drive, which is not specifically limited here. Similarly, the contoured chuck can adopt any mechanism in the prior art that can achieve the clamping function.

[0073] In this embodiment, the outer diameter of the seamless tube blank 2 is Φ839mm, the wall thickness is 0.25mm, and the material is a high-temperature alloy seamless steel pipe. If there is no suitable diameter and wall thickness, a standard high-temperature alloy steel pipe can be customized or purchased for preparation by a ring rolling machine. The heating and cutting machine 6 has at least six degrees of freedom and can heat any process position of the seamless tube blank 2 to the forging temperature and the hot extrusion process temperature. Preferably, an industrial robot is used in conjunction with a laser, the laser is heated by speckle, and is cut by focusing and cooperating with a laser cutting auxiliary mechanism to cut off the high-temperature alloy sealing ring 1 formed by hot extrusion at the end of the seamless tube blank 2.

[0074] See also Fig.13 , Fig.14 As shown, in this embodiment, the cross section of the obtained high-temperature alloy sealing ring 1 is W-shaped, with the opening facing outward, the inner diameter of the high-temperature alloy sealing ring 1 is Φ822mm, the wall thickness is 0.25mm, and the other dimensions are as follows Fig.14 The marking in. The outer wall of the high-temperature alloy sealing ring 1 has a first axial inward concave annular scanning space 101 and a second axial inward concave annular scanning space 103 from the inside to the outside. The first axial inward concave annular scanning space 101 and the second axial inward concave annular scanning space 103 have a first inward concave curve and a second inward concave curve respectively. The angle 102 between the tangent of the outer end point of the first inward concave curve and the radial direction is 11°, and the angle 104 between the tangent of the outer end point of the second inward concave curve and the radial direction is 29°. The external axial non-processing end mold 1001 and the first axial inward concave annular scanning space 101 and the second axial inward concave annular scanning space 103 are squeezed into and exited after the extrusion is completed, including the axial diameter coupling forging of the external axial non-processing end mold 1001. The movement angle of the axial diameter coupling forging includes but is not limited to an angle greater than or equal to 11° with the radial direction.

[0075] Specifically, when the six dies in the internal die assembly 13 and the external die assembly 14 are hot-forged or hot-extruded, the internal axial non-processing end die 701, the internal middle die 801 and the internal axial processing end die 901 fit the inner surface of the high-temperature alloy sealing ring 1. The external axial non-processing end die 1001, the external middle die 1101 and the external axial processing end die 1201 fit the outer surface of the high-temperature alloy sealing ring 1, see Fig. 9 The circumferential scanning rotation center lines of the six dies coincide with the axis of the seamless tube 2, and the circumferential scanning angle of the six dies for hot die forging is preferably 10° in this embodiment. Fig.12 As shown, the axial view of the external middle die 1101, the angle of the forging curved surface where the external middle die 1101 contacts the high-temperature alloy sealing ring 1 is 10°. The six dies have two groups of rotary extrusion guide fillets, which are the transition between the die scanning starting axial section and the die extrusion surface, and the transition between the die scanning ending axial section and the die extrusion surface. The rotary extrusion guide fillets of the six dies can shape the high-temperature alloy sealing ring 1 during the rotary hot extrusion forming process, improve the accuracy of shape and position errors, eliminate forging indentations, and have the technical advantage of no springback compared to the prior art room temperature spinning.

[0076] The present invention provides a device for preparing a high-temperature alloy sealing ring from a seamless tube billet, which realizes the process of preparing a high-temperature alloy sealing ring with a W-shaped cross-section from a seamless tube billet through the coordinated action of a hot extrusion forming mechanism and a tube billet self-rotating feeder. The forming process is controllable and the forming accuracy is high, which meets the process requirements of the complex cross-sectional shape of the W-shaped sealing ring and improves the reliability of the sealing ring and the service performance of the engine.

[0077] Another embodiment of the present invention provides a method for preparing a high-temperature alloy sealing ring device using the seamless tube blank as described above, comprising the following steps:

[0078] Step S1: The seamless tube blank 2 is mounted on the tube blank self-rotating feeder 5, the tube blank axial feeder 4 clamps the non-processing end of the seamless tube blank 2, and the tube blank axial feeder 4 axially feeds so that the processing end of the seamless tube blank 2 extends forward to a set process length;

[0079] Step S2: the tube blank self-rotating feeder 5 clamps the seamless tube blank 2, and the tube blank axial feeder 4 releases the non-processing end of the seamless tube blank 2;

[0080] Step S3: the internal axial non-processing end die 701, the internal middle die 801 and the internal axial processing end die 901 move to the inner side of the processing end of the seamless tube 2 to set the process position; the inner side of the processing end to set the process position is the position for process simulation by the radial forging simulation software, which fully considers the process state of the seamless tube 2 during thermal deformation;

[0081] Step S4: establishing a non-oxidizing atmosphere;

[0082] Step S5: heating the processing end of the seamless tube blank 2 to the forging process temperature by the heating and cutting machine 6;

[0083] Step S6: the external axial non-processing end die 1001 and the external axial processing end die 1201 perform a process step of shaft diameter coupling forging according to a set hot extrusion path;

[0084] Specifically, a process step of the shaft-diameter coupling forging is as follows: the external axial non-processing end die 1001 is forged in steps, forged in one process step, and then returned to the position, and the step length of each step is increased until the seamless tube blank 2 and the curved surface micro-gap of the internal axial non-processing end die 701 and the external axial non-processing end die 1001 are matched; at the same time, the external axial processing end die 1201 is also forged in steps, forged in one process step, and then returned to the position, and the step length of each step is increased until the curved surface micro-gap of the seamless tube blank 2 and the internal axial processing end die 901 and the external axial processing end die 1201 is matched;

[0085] Step S7: the tube blank self-rotating feeder 5 drives the seamless tube blank 2 to rotate for one process step;

[0086] Step S8: Repeat step S6 and step S7 until the axial and radial coupling of the external axial non-processing end die 1001 and the external axial processing end die 1201 are forged to a forming position;

[0087] Step S9: radial forging of the outer middle die 1101 is a process step;

[0088] Step S10: the tube blank self-rotating feeder 5 drives the seamless tube blank 2 to rotate for one process step;

[0089] Step S11: Repeat steps S9 and S10 until the external middle die 1101 is radially forged to a forming position; during this process, the deformed tube blank will have tangential motion with the external axial non-processing end driving forming die 10 and the external axial processing end driving forming die 12;

[0090] See also Figure 8 , Fig. 9As shown, the inner end of the seamless tube blank 2 has a micro-gap fit with the curved surface of the internal axial non-processing end mold 701 and the external axial non-processing end mold 1001, and the outer end of the seamless tube blank 2 has a micro-gap fit with the curved surface of the internal axial processing end mold 901 and the external axial processing end mold 1201; under the radial forging of the external middle mold 1101, the seamless tube blank 2 and the internal middle mold 801 and the external middle mold 1101 change from a gap to a close fit, and the seamless tube blank 2 and the micro-gap fit curved surface of the internal axial processing end mold 901 and the external axial processing end mold 1201 slide tangentially. The radial forging is the circumferential rotation of the seamless tube blank 2 and the radial forging of the external middle mold 1101, and the hot forging forming process of the seamless tube blank 2 is completed in alternating steps;

[0091] Step S12: The tube blank self-rotating feeder 5 drives the seamless tube blank 2 to rotate and smooth out the forging and extrusion marks; the high-temperature alloy sealing ring 1 is shaped by the six dies and the rotating extrusion guide fillets contained in the dies to improve the forming accuracy;

[0092] Step S13: Switch the non-oxidizing atmosphere to an air environment;

[0093] Step S14: The formed part is cut off by the heating and cutting machine 6 to obtain a high-temperature alloy sealing ring 1 with a W-shaped cross section.

[0094] Then, continue to cycle the next preparation process.

[0095] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device for preparing a high-temperature alloy sealing ring from a seamless tube, characterized in that: The invention comprises a heating and cutting machine (6), a base (3), and a hot extrusion forming mechanism, a tube blank self-rotating feeder (5), and a tube blank axial feeder (4) which are sequentially arranged on the base (3), wherein the tube blank self-rotating feeder (5) is used to clamp the seamless tube blank (2) and can drive the seamless tube blank (2) to rotate circumferentially, and the tube blank axial feeder (4) is used to axially drive and feed the non-processing end of the seamless tube blank (2); the hot extrusion forming mechanism is used to perform hot extrusion forming on the processing end of the seamless tube blank (2), and the heating and cutting machine (6) is used to heat the front end of the seamless tube blank (2) and cut the hot extruded high-temperature alloy sealing ring (1) with a W-shaped cross section; The hot extrusion forming mechanism comprises an internal die assembly (13) and an external die assembly (14), wherein the internal die assembly (13) is formed and positioned on the inner side of the processing end of the seamless tube blank (2); and the external die assembly (14) is intermittently hot forged on the outer side of the processing end of the seamless tube blank (2), and is performed alternately with the circumferential rotation of the seamless tube blank (2) until the forging reaches the forming position, thereby completing the hot extrusion forming of the high-temperature alloy sealing ring (1); The internal mold assembly (13) comprises an internal axial non-processing end drive forming mold (7), an internal middle drive forming mold (8) and an internal axial processing end drive forming mold (8); The internal axial non-processing end drive forming die (7) comprises an internal axial non-processing end drive unit and an internal axial non-processing end die (701) connected to the internal axial non-processing end drive unit; The internal middle driving forming mold (8) comprises an internal middle driving unit and an internal middle mold (801) connected to the internal middle driving unit; The internal axial processing end drive forming die (9) comprises an internal axial processing end drive unit and an internal axial processing end die (901) connected to the internal axial processing end drive unit; The internal axial non-processing end die (701), the internal middle die (801) and the internal axial processing end die (901) are arranged in sequence from the inside to the outside along the axial direction of the seamless tube blank (2); the shape of the forged extrusion surfaces of the internal axial non-processing end die (701), the internal middle die (801) and the internal axial processing end die (901) after being assembled is the same as the shape of the inner wall of the high-temperature alloy sealing ring (1); The external mold assembly (14) comprises an external axial non-processing end drive forming mold (10), an external middle drive forming mold (11) and an external axial processing end drive forming mold (12); The external axial non-processing end drive forming die (10) comprises an external axial non-processing end drive unit (1005) and an external axial non-processing end die (1001) connected to the external axial non-processing end drive unit (1005); The external middle driving forming mold (11) comprises an external middle driving unit (1105) and an external middle mold (1101) connected to the external middle driving unit (1105); The external axial processing end drive forming die (12) comprises an external axial processing end drive unit (1205) and an external axial processing end die (1201) connected to the external axial processing end drive unit (1205); The external axial non-processing end die (1001), the external middle die (1101) and the external axial processing end die (1201) are arranged in sequence from the inside to the outside along the axial direction of the seamless tube blank (2), and correspond one-to-one to the internal axial non-processing end die (701), the internal middle die (801) and the internal axial processing end die (901); the shape of the forged extrusion surfaces of the external axial non-processing end die (1001), the external middle die (1101) and the external axial processing end die (1201) after being assembled is the same as the shape of the outer wall of the high-temperature alloy sealing ring (1).

2. The device for preparing a high-temperature alloy sealing ring from a seamless tube blank according to claim 1, characterized in that: Each driving unit in the internal mold assembly (13) and the external mold assembly (14) has the ability to move axially and radially relative to the seamless tube blank (2) and the ability to couple axially and radially.

3. The device for preparing high-temperature alloy sealing rings from seamless tube blanks according to claim 1, characterized in that: The upper and lower edges of the forging and extrusion surfaces of each die in the internal die assembly (13) and the external die assembly (14) are both provided with rotary extrusion guide fillets.

4. The device for preparing a high-temperature alloy sealing ring from a seamless tube blank according to claim 1, characterized in that: The tube blank self-rotating feeder (5) comprises a large tube (501), a small tube (502), a rotation driving mechanism and a radial profiling fixture, wherein the large tube (501) is fixed on the base (3), the small tube (502) is rotatably mounted on the inner side of the large tube (501), the rotation driving mechanism is arranged on the large tube (501), and the output end is connected to the small tube (502), and the rotation driving mechanism is used to drive the small tube (502) to rotate; the radial profiling fixture is coaxially mounted on the end of the small tube (502), and the seamless tube blank (2) is inserted into the small tube (502) and is clamped by the radial profiling fixture.

5. The device for preparing high-temperature alloy sealing rings from seamless tube blanks according to claim 4 is characterized in that: The radial profiling clamp comprises a radial profiling chuck I (503) and a radial profiling chuck II (504) which can be opened and closed radially. When the radial profiling chuck I (503) and the radial profiling chuck II (504) are closed, a gap (505) is formed between the corresponding ends.

6. The device for preparing high-temperature alloy sealing rings from seamless tube blanks according to claim 1, characterized in that: The tube blank axial feeder (4) comprises a column (403), a profiling chuck and an axial drive mechanism, wherein the column (403) and the base (3) are slidably connected along the axial direction of the seamless tube blank (2); the axial drive mechanism is arranged on the base (3) and the output end is connected to the column (403); the axial drive mechanism is used to drive the column (403) to move; the profiling chuck is arranged on the column (403) and is used to clamp the non-processing end of the seamless tube blank (2).

7. A method for preparing a high-temperature alloy sealing ring device using the seamless tube blank according to claim 2, characterized in that: The following steps are involved: Step S1: The seamless tube blank (2) is mounted on the tube blank self-rotating feeder (5), the tube blank axial feeder (4) clamps the non-processing end of the seamless tube blank (2), and the tube blank axial feeder (4) axially feeds so that the processing end of the seamless tube blank (2) extends forward to a set process length; Step S2: the tube blank self-rotating feeder (5) clamps the seamless tube blank (2), and the tube blank axial feeder (4) releases the non-processing end of the seamless tube blank (2); Step S3: the internal axial non-processing end mold (701), the internal middle mold (801) and the internal axial processing end mold (901) are moved to the inner side of the processing end of the seamless tube blank (2) to set the process position; Step S4: establishing a non-oxidizing atmosphere; Step S5: heating the processing end of the seamless tube blank (2) to a forging process temperature by means of a heating and cutting machine (6); Step S6: the external axial non-processing end die (1001) and the external axial processing end die (1201) perform axial and radial coupling forging in a process step according to a set hot extrusion path; Step S7: the tube blank self-rotating feeder (5) drives the seamless tube blank (2) to rotate for one process step; Step S8: Repeating steps S6 and S7 until the axial and radial coupling of the external axial non-processing end die (1001) and the external axial processing end die (1201) are forged to a forming position; Step S9: radial forging of the outer middle die (1101) in one process step; Step S10: the tube blank self-rotating feeder (5) drives the seamless tube blank (2) to rotate for one process step; Step S11: Repeat steps S9 and S10 until the outer middle die (1101) is radially forged to a forming position; Step S12: the tube blank self-rotating feeder (5) drives the seamless tube blank (2) to rotate and smooth out the forging and extrusion marks; Step S13: Switch the non-oxidizing atmosphere to an air environment; Step S14: cutting off the formed part by a heating and cutting machine (6) to obtain a high-temperature alloy sealing ring (1) with a W-shaped cross section.

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