Multidirectional static fatigue test tool for cartridge receiver and test method of multidirectional static fatigue test tool

Abstract

The invention provides a multidirectional static fatigue test tool for a cartridge receiver, which can quickly adapt to various states for static fatigue test after cartridge receiver parts are assembled, and the cartridge receiver parts cannot be abraded during state switching. Cartridge receiver parts suitable for the tool comprise a peripheral flange and an inner sleeve, a plurality of positioning holes are annularly distributed in the outer end face of the inner sleeve, and the tool is characterized by comprising a pressing block used for being attached to the outer end face of the inner sleeve in a pressing mode and arranged in a centering mode with the inner sleeve, and a threaded hole is formed in the center of the pressing block; the fastening pressing plate is an annular plate, and a pressing block is fixedly arranged in positioning holes annularly distributed in the outer end face of the inner sleeve through a fastener; the switching tool is used for fixedly connecting the casing part and enabling the outer end face of an inner sleeve of the casing part to be exposed; the side plate tool comprises an inclined mounting surface and a bottom supporting surface, and the inclined mounting surface and the bottom supporting surface form an acute angle according to design to form an inclined stress surface; a tool bottom plate; and three groups of pressing rods.

Description

Technical Field

[0001] The present invention relates to the technical field of casing fatigue testing, in particular to a multi-directional static fatigue testing tool for casings. The present invention also provides a multi-directional static fatigue testing method for casings. Background Art

[0002] With the advancement of aircraft engine technology, more and more new engines are demanding lightweight designs. Besides structural design, lightweighting can also be considered from a material perspective. A new design scheme utilizing a hybrid of metal and thermoplastic composites to manufacture casings simplifies the structure of aircraft engine components, reduces weight, and effectively improves overall engine performance. The metal framework ensures strength and thermal conductivity, while the composite material reduces structural weight while maintaining strength.

[0003] However, the plasticity and fatigue properties of composite materials differ from those of metals. Therefore, after the design and trial production of a composite casing, static and fatigue testing are required to verify the reliability of the structure. Based on the casing's operating conditions, static testing is divided into three types: axial force, radial force, and resultant force.

[0004] Current static fatigue test fixtures for components are mostly unidirectional. Changing direction requires disassembly and adjustment, which complicates the process. Furthermore, the mating areas of components are susceptible to wear, making it difficult to accurately maintain the desired state. Therefore, there is an urgent need to develop a universal, multi-directional static fatigue test fixture that can adapt to various testing conditions, making switching between different side-view working conditions quick and easy. Summary of the Invention

[0005] In response to the above problems, the present invention provides a multi-directional static fatigue test tooling for the receiver, which can quickly adapt to multiple states for static fatigue testing after the receiver parts are assembled, and will not wear the receiver parts when switching states, ensuring that the static test is carried out efficiently and stably.

[0006] The multi-directional static fatigue test fixture for the receiver is suitable for receiver parts including an outer peripheral flange and an inner sleeve, and the outer end surface of the inner sleeve is surrounded by a plurality of positioning holes. It is characterized in that it includes:

[0007] A pressing block, which is used to press the outer end surface of the inner sleeve and is arranged in the center of the inner sleeve, and a threaded hole is provided in the center of the pressing block;

[0008] A fastening pressure plate, which is a ring plate, fixes the pressure block to the positioning hole of the ring cloth on the outer end surface of the inner sleeve through fasteners;

[0009] A transfer tool, which is used to fix the receiver part and expose the outer end surface of the inner sleeve of the receiver part;

[0010] The side panel tooling includes an oblique mounting surface and a bottom supporting surface, wherein the oblique mounting surface and the bottom supporting surface are formed at an acute angle according to the design, forming an oblique force-bearing surface;

[0011] Tooling base plate;

[0012] And three groups of compression rods, the three groups of compression rods are vertical compression rods, oblique compression rods, and C-shaped compression rods;

[0013] The receiver parts are pre-positioned and assembled from the non-stress-bearing surface of the adapter tooling, so that the outer end surface of the inner sleeve of the receiver parts is exposed outward and becomes the stress-bearing surface. The pressure block covers the outer end surface of the inner sleeve of the receiver parts and is fixed by tightening the pressure plate and fasteners. The threaded hole at the center of the pressure block is used to fix the connecting end of the corresponding pressure rod. The receiver parts, adapter tooling, pressure block, and tightening pressure plate are assembled to form the overall structure to be tested.

[0014] It is further characterized by:

[0015] The vertical pressure rod is a column structure, which includes an upper pressure rod end and a lower downwardly convex threaded connection end. The vertical pressure rod, the overall structure to be tested, and the tooling base plate are combined to perform an axial force static pressure test. The overall structure to be tested is arranged horizontally, and the pressure block is located on the upper layer. The lower threaded connection end of the vertical pressure rod is fixedly connected to the threaded hole of the pressure block. The adapter tool is fixedly connected to the corresponding position of the upper surface of the tooling base plate through a vertical stud. The upper pressure rod end of the vertical pressure rod is subjected to force to perform an axial static test.

[0016] The oblique pressure rod is a columnar structure, which includes an upper force-bearing end and a lower force-transmitting end, and the bottom of the lower force-transmitting end includes an acute-angled inclined surface, and a through positioning hole is provided on the acute-angled inclined surface, and the through positioning hole is arranged perpendicular to the acute-angled inclined surface. The oblique pressure rod, the overall structure to be tested, the side panel tooling, and the tooling bottom plate are combined to perform an oblique force static pressure test, and the bottom surface of the transfer tooling of the overall structure to be tested is fixedly installed close to the oblique mounting surface, and the bottom supporting surface of the side panel tooling is fixedly installed close to the upper surface of the tooling bottom plate, the acute-angled inclined surface is close to the pressure block, and the through positioning hole and the threaded hole are coaxially arranged, and the fastening bolt passes through the through positioning hole and is threadedly fixed to the threaded hole, and the upper force-bearing end of the oblique pressure rod is subjected to force to perform an oblique static test;

[0017] Preferably, the angle of the acute bevel is 45°, which is used for performing resultant force static testing;

[0018] The C-shaped pressure rod comprises a horizontal short rod, a vertical rod, and a horizontal long rod. The horizontal long rod and the horizontal short rod are connected by a vertical rod. The horizontal long rod is used for structural pressure. The horizontal short rod is provided with a through guide hole along its length direction. The C-shaped pressure rod, the overall structure to be tested, and the tooling base plate are combined to perform a radial force static pressure test. The overall structure to be tested is arranged vertically, the threaded hole of the pressure block is arranged horizontally, and one side of the adapter tool is fixed to the upper surface of the tooling base plate. The horizontal short rod is arranged at the lower part of the vertical rod. The through guide hole and the threaded hole of the horizontal short rod are coaxially connected. The fastening bolt passes through the through guide hole and is threadedly fixed to the threaded hole. The equivalent vertical surface formed by the horizontal long rod, the vertical rod, and the horizontal short rod is arranged perpendicular to the upper surface of the tooling base plate.

[0019] Preferably, the length of the vertical rod is greater than the distance from the threaded hole of the overall structure to be measured to one of the side edges, and the horizontal long rod is arranged above the upper side edge of the adapter tooling in the vertical state;

[0020] The transfer fixture includes positioning holes at the four corners in a horizontal state, and auxiliary positioning holes spaced apart at both ends of the auxiliary side in a vertical state;

[0021] The tooling base plate includes two groups of positioning holes extending through a pair of sides, each group of positioning holes including an end positioning hole and adjacent center positioning holes on both sides, and the spacing between the two adjacent center positioning holes is equal to the spacing between the auxiliary positioning holes at the same end of the auxiliary positioning side of the transfer tooling in the vertical state;

[0022] The oblique mounting surface of the side panel tooling is provided with alignment holes corresponding to the positioning holes at the four corners, and the bottom support surface is provided with alignment holes corresponding to the positioning holes of the positioning hole group of the tooling bottom plate;

[0023] The transfer tooling includes a receiver part positioning cavity that is concave from the inside to the outside, the center of the receiver part positioning cavity is a central through hole, and positioning holes are distributed around the outer ring. The outer peripheral flange of the receiver part fits into the outer ring of the receiver part positioning cavity from the inside to the outside, and is fixed to the corresponding positioning hole from the inside to the outside by screws, and the outer end face of the inner sleeve of the receiver part is arranged to face outward.

[0024] A test method for static testing using a multi-directional static fatigue test fixture is characterized in that the casing parts, the adapter fixture, the pressure block, and the fastening pressure plate are assembled in advance to form the overall structure to be tested. Then, by switching the posture of the overall structure to be tested relative to the fixture base plate and replacing the corresponding pressure rod, a static test under the corresponding stress state can be performed.

[0025] It is further characterized by:

[0026] During the axial static test, the overall structure to be tested is arranged horizontally relative to the tooling base plate, and the pressure of the press is vertically transmitted to the press plate through the vertical pressure rod;

[0027] During the radial static test, the overall structure to be tested is arranged vertically relative to the tooling base plate, and the pressure of the press is radially transmitted to the pressure plate through the C-shaped pressure rod;

[0028] During the combined force static test, the overall structure to be tested is fixed obliquely to the oblique mounting surface of the side panel fixture, the bottom support surface of the side panel fixture is fixed to the upper surface of the fixture bottom plate, and the pressure of the press is transmitted to the pressure plate through the oblique pressure rod.

[0029] After adopting the structure of the present invention, when in use, the receiver parts are locked and fixed to the receiver part positioning cavity of the transfer tooling by bolts from the inner cavity, the pressure block is pressed into the inner sleeve of the receiver part and positioned, and then the tightening pressure plate is installed. Finally, the appropriate pressure rod is installed according to the direction of the force required, and the position state of the overall structure to be tested is adjusted. The tooling has three usage modes, which are used to perform static tests under three working conditions: axial force, radial force and resultant force. After the overall structure to be tested is assembled, when adjusting the forces in different directions, there is no need to disassemble and assemble the receiver parts. It is only necessary to change the posture of the overall structure to be tested relative to the tooling base plate and replace the corresponding pressure rod to perform static tests under corresponding force states. After the receiver parts are assembled, they can quickly adapt to multiple states for static fatigue testing, and will not wear the receiver parts when switching states, ensuring that the static test is carried out efficiently and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The structural three-dimensional structure of the combined force test of the present invention Figure 1 ;

[0031] Figure 2 The structural three-dimensional structure of the combined force test of the present invention Figure 2 ;

[0032] Figure 3 The structural three-dimensional axial force test of the present invention Figure 1 ;

[0033] Figure 4 The structural three-dimensional axial force test of the present invention Figure 2 ;

[0034] Figure 5 The structural three-dimensional structure of the radial force test of the present invention Figure 1 ;

[0035] Figure 6 The structural three-dimensional structure of the radial force test of the present invention Figure 2 ;

[0036] Figure 7The structural three-dimensional structure of the radial force test of the present invention Figure 3 ;

[0037] The names corresponding to the serial numbers in the figure are as follows:

[0038] Pressure block 10, threaded hole 11, fastening pressure plate 20, adapter tooling 30, receiver part positioning cavity 301, center through hole 302, four corner position positioning holes 31, auxiliary positioning hole 32, side panel tooling 40, oblique mounting surface 41, bottom support surface 42, alignment positioning hole 43, tooling bottom plate 50, end positioning hole 51, center position positioning hole 52, vertical pressure rod 60, upper pressure rod end 61, lower convex threaded connection end 62, oblique pressure rod 70, upper force-bearing end 71, lower force-transmitting end 72, acute angled surface 721, C-shaped pressure rod 80, horizontal short rod 81, vertical rod 82, horizontal long rod 83, overall structure to be tested 90, receiver part 100, outer peripheral flange 101, inner sleeve 102. DETAILED DESCRIPTION

[0039] The multi-directional static fatigue test fixture for the casing includes a casing part 100 including an outer flange 101 and an inner sleeve 102, and a plurality of positioning holes are arranged around the outer end surface of the inner sleeve 102. Figure 1-Figure 7 , which includes a pressing block 10, a fastening pressing plate 20, a transfer tooling 30, a side panel tooling 40, a tooling bottom plate 50, and three sets of pressing rods;

[0040] The pressing block 10 is used to press the outer end surface of the inner sleeve 102 and is arranged in the center of the inner sleeve 102. A threaded hole 11 is provided in the center of the pressing block 10;

[0041] The fastening plate 20 is a ring plate, which fixes the pressing block 10 to the positioning hole of the ring cloth on the outer end surface of the inner sleeve 102 through fasteners;

[0042] The adapter 30 is used to fix the receiver component 100 and expose the outer end surface of the inner sleeve 102 of the receiver component 100;

[0043] The side panel tooling 40 includes an oblique mounting surface 41 and a bottom support surface 42. The oblique mounting surface 41 and the bottom support surface 42 are formed at an acute angle according to the design, forming an oblique force-bearing surface.

[0044] The three groups of compression rods are vertical compression rod 60, oblique compression rod 70, and C-shaped compression rod 80;

[0045] The receiver part 100 is pre-positioned and assembled from the non-stress-bearing surface of the adapter tool 30, so that the outer end surface of the inner sleeve 102 of the receiver part 100 is exposed outward and becomes the stress-bearing surface. The pressure block 10 covers the outer end surface of the inner sleeve 102 of the receiver part 100 and is fixed by fastening the pressure plate 20 and fasteners. The threaded hole 11 at the center of the pressure block 10 is used to fix the connecting end of the corresponding pressure rod. The receiver part 100, the adapter tool 30, the pressure block 10, and the fastening pressure plate 20 are assembled to form the overall structure 90 to be tested.

[0046] During specific implementation, the vertical pressure rod 60 is a columnar structure, which includes an upper pressure rod end 61 and a lower convex threaded connection end 62. The vertical pressure rod 60, the overall structure to be tested 90, and the tooling base plate 50 are combined to perform an axial force static pressure test. The overall structure to be tested 90 is arranged horizontally and the pressure block 10 is located on the upper layer. The lower threaded connection end 62 of the vertical pressure rod 60 is fixed to the threaded hole 11 of the pressure block 10, and the adapter tooling 30 is fixed to the corresponding position on the upper surface of the tooling base plate 50 through a vertical stud. The upper pressure rod end 61 of the vertical pressure rod 60 is subjected to force for an axial static test.

[0047] The oblique pressure rod 70 is a columnar structure, which includes an upper force-bearing end 71 and a lower force-transmitting end 72. The bottom of the lower force-transmitting end 72 includes an acute angled surface 721. A through positioning hole is provided on the acute angled surface 721. The through positioning hole is arranged perpendicular to the acute angled surface 721. The oblique pressure rod 70, the overall structure to be tested 90, the side panel fixture 40, and the fixture bottom plate 50 are combined to perform an oblique force static pressure test. The bottom surface of the adapter fixture 30 of the overall structure to be tested 90 is in close contact with the bottom surface of the adapter fixture 30. The oblique mounting surface 41 is fixedly installed, and the bottom supporting surface 42 of the side panel tooling 40 is fixedly installed close to the upper surface of the tooling base plate 50. The acute-angled bevel 721 is close to the pressure block 10, and is coaxially arranged through the positioning hole and the threaded hole 11. The fastening bolt 1 passes through the positioning hole and is threadedly fixed to the threaded hole 11. The upper force-bearing end 71 of the oblique pressure rod 70 is subjected to force for an oblique static test. In specific implementation, the angle of the acute-angled bevel 721 is 45°, which is used for a resultant static test.

[0048] The C-shaped pressure rod 80 includes a horizontal short rod 81, a vertical rod 82, and a horizontal long rod 83. The horizontal long rod 83 and the horizontal short rod 81 are connected by the vertical rod 82. The horizontal long rod 83 is used for structural pressure. The horizontal short rod 81 is provided with a through guide hole along its length direction. The C-shaped pressure rod 80, the overall structure to be tested 90, and the tooling base plate 50 are combined to perform a radial force static pressure test. The side overall structure 90 is arranged vertically, the threaded hole 11 of the pressure block 10 is arranged horizontally, and one side of the adapter tool 30 is fixed to the upper surface of the tooling base plate 50. The horizontal short rod 81 is arranged at the lower part of the vertical rod 82. The through guide hole and the threaded hole 11 of the horizontal short rod 81 are coaxially connected. The fastening bolt 1 passes through the through guide hole and is threadedly fixed to the threaded hole 11. The equivalent vertical surface formed by the horizontal long rod 83, the vertical rod 82, and the horizontal short rod 81 is arranged perpendicular to the upper surface of the tooling base plate 50.

[0049] In a specific embodiment, the length of the vertical rod 82 is greater than the distance from the threaded hole 11 of the overall structure 90 to be tested to one side edge, and the horizontal long rod 83 is arranged above the upper side edge of the adapter tooling 50 in the vertical state.

[0050] In a specific implementation, the transfer tool 30 includes four corner positioning holes 31 in a horizontal state, and auxiliary positioning holes 32 spaced apart at both ends of the auxiliary side in a vertical state;

[0051] The tooling base plate 50 includes two groups of positioning holes extending through a pair of sides. Each group of positioning holes includes an end positioning hole 51 and two adjacent center positioning holes 52. The spacing between the two adjacent center positioning holes 52 is equal to the spacing between the auxiliary positioning holes 32 at the same end of the auxiliary positioning side of the transfer tooling 30 in the upright state.

[0052] The oblique mounting surface 41 of the side panel tooling 40 is provided with alignment holes 43 corresponding to the positioning holes 31 at the four corners, and the bottom support surface 42 is provided with alignment holes corresponding to the positioning holes 52 of the positioning hole group of the tooling bottom plate 50;

[0053] The adapter tool 30 includes a receiver part positioning cavity 301 that is concave from the inside to the outside. The center of the receiver part positioning cavity 301 is a central through hole 302, and positioning holes are distributed around the outer ring. The outer peripheral flange 101 of the receiver part 100 fits into the outer ring of the receiver part positioning cavity 301 from the inside to the outside, and is fixed to the corresponding positioning holes from the inside to the outside by screws. The outer end face of the inner sleeve 102 of the receiver part 100 is set outward.

[0054] A test method for performing a static test using a multi-directional static fatigue test fixture: the receiver part 100, the adapter fixture 30, the pressure block 10, and the fastening pressure plate 20 are pre-assembled to form an overall structure 90 to be tested. Then, by switching the posture of the overall structure 90 to be tested relative to the fixture base plate 50 and replacing the corresponding pressure rod, a static test under the corresponding stress state can be performed.

[0055] In specific implementation, during the axial static test, the overall structure to be tested 90 is arranged horizontally relative to the tooling base plate 50, and the pressure of the press is vertically transmitted to the press plate 10 through the vertical pressure rod 60;

[0056] During the radial static test, the overall structure to be tested 90 is arranged vertically relative to the tooling base plate 50, and the pressure of the press is radially transmitted to the pressing plate 10 through the C-shaped pressure rod 80;

[0057] During the combined force static test, the overall structure 90 to be tested is obliquely fixed to the oblique mounting surface 41 of the side panel tooling 40, and the bottom support surface 42 of the side panel tooling 40 is fixed to the upper surface of the tooling bottom plate 50, and the pressure of the press is transmitted to the pressing plate 10 through the oblique pressure rod 70.

[0058] Its working principle is as follows: when in use, the receiver parts are locked and fixed to the receiver part positioning cavity of the adapter tooling by bolts from the inner cavity, the pressure block is pressed into the inner sleeve of the receiver parts and positioned, and then the tightening pressure plate is installed. Finally, the appropriate pressure rod is installed according to the direction of force required, and the position state of the overall structure to be tested is adjusted. The tooling has three usage modes, which are used for static tests under three working conditions: axial force, radial force and resultant force. After the overall structure to be tested is assembled, there is no need to disassemble and assemble the receiver parts when adjusting the forces in different directions. It is only necessary to change the posture of the overall structure to be tested relative to the tooling base plate and replace the corresponding pressure rod to perform static tests under the corresponding force state. After the receiver parts are assembled, they can quickly adapt to multiple states for static fatigue testing, and will not wear the receiver parts when switching states, ensuring that the static test is carried out efficiently and stably.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multi-directional static fatigue test fixture for a receiver, wherein the applicable receiver parts include an outer peripheral flange and an inner sleeve, and the outer end surface of the inner sleeve is circumferentially provided with a plurality of positioning holes. The fixture is characterized in that it includes: A pressing block, which is used to press the outer end surface of the inner sleeve and is arranged in the center of the inner sleeve, and a threaded hole is provided in the center of the pressing block; A fastening pressure plate, which is a ring plate, fixes the pressure block to the positioning hole of the ring cloth on the outer end surface of the inner sleeve through fasteners; A transfer tool, which is used to fix the receiver part and expose the outer end surface of the inner sleeve of the receiver part; The side panel tooling includes an oblique mounting surface and a bottom supporting surface, wherein the oblique mounting surface and the bottom supporting surface are formed at an acute angle according to the design, forming an oblique force-bearing surface; Tooling base plate; And three groups of compression rods, the three groups of compression rods are vertical compression rods, oblique compression rods, and C-shaped compression rods; The receiver parts are pre-positioned and assembled from the non-stress-bearing surface of the adapter tooling, so that the outer end surface of the inner sleeve of the receiver parts is exposed outward and becomes the stress-bearing surface. The pressure block covers the outer end surface of the inner sleeve of the receiver parts and is fixed by tightening the pressure plate and fasteners. The threaded hole at the center of the pressure block is used to fix the connecting end of the corresponding pressure rod. The receiver parts, adapter tooling, pressure block, and tightening pressure plate are assembled to form the overall structure to be tested.

2. The multi-directional static fatigue test fixture for a casing according to claim 1, characterized in that: The vertical pressure rod is a columnar structure, which includes an upper pressure rod end and a lower downwardly protruding threaded connection end. The vertical pressure rod, the overall structure to be tested, and the tooling base plate are combined to perform an axial static pressure test. The overall structure to be tested is arranged horizontally and the pressure block is located on the upper layer. The lower threaded connection end of the vertical pressure rod is fixed to the threaded hole of the pressure block. The adapter tool is fixed to the corresponding position of the upper surface of the tooling base plate through a vertical stud. The upper pressure rod end of the vertical pressure rod is subjected to force to perform an axial static test.

3. The multi-directional static fatigue test fixture for a casing according to claim 1, characterized in that: The oblique pressure rod is a columnar structure, which includes an upper force-bearing end and a lower force-transmitting end. The bottom of the lower force-transmitting end includes an acute-angled inclined surface, and a through positioning hole is provided on the acute-angled inclined surface, which is arranged perpendicular to the acute-angled inclined surface. The oblique pressure rod, the overall structure to be tested, the side panel tooling, and the tooling bottom plate are combined to perform an oblique force static pressure test. The bottom surface of the transfer tooling of the overall structure to be tested is fixedly installed close to the oblique mounting surface, and the bottom supporting surface of the side panel tooling is fixedly installed close to the upper surface of the tooling bottom plate. The acute-angled inclined surface is close to the pressure block, and the through positioning hole and the threaded hole are coaxially arranged. The fastening bolt passes through the through positioning hole and is threadedly fixed to the threaded hole. The upper force-bearing end of the oblique pressure rod is subjected to force to perform an oblique static test.

4. The multi-directional static fatigue test fixture for a casing according to claim 1, characterized in that: The C-shaped pressure rod includes a horizontal short rod, a vertical rod, and a horizontal long rod. The horizontal long rod and the horizontal short rod are connected by a vertical rod. The horizontal long rod is used for structural pressure. The horizontal short rod is provided with a through guide hole along its length direction. The C-shaped pressure rod, the overall structure to be tested, and the tooling base plate are combined to perform radial force static pressure testing. The overall structure to be tested is arranged vertically, the threaded hole of the pressure block is arranged horizontally, and one side of the adapter tool is fixed to the upper surface of the tooling base plate. The horizontal short rod is arranged at the lower part of the vertical rod. The through guide hole and the threaded hole of the horizontal short rod are coaxially connected, and the fastening bolt is threadedly fixed to the threaded hole after passing through the through guide hole. The equivalent vertical surface formed by the horizontal long rod, the vertical rod, and the horizontal short rod is arranged perpendicular to the upper surface of the tooling base plate.

5. The multi-directional static fatigue test fixture for a casing according to claim 1, characterized in that: The transfer tooling includes positioning holes at the four corners in a horizontal state, and auxiliary positioning holes spaced apart at both ends of the auxiliary side in a vertical state.

6. The multi-directional static fatigue test fixture for a casing according to claim 5, characterized in that: The tooling base includes two groups of positioning holes that are arranged on one pair of sides, each group of positioning holes includes an end positioning hole and adjacent center position positioning holes on both sides, and the spacing between the two adjacent center position positioning holes is equal to the spacing between the auxiliary positioning holes at the same end of the auxiliary positioning side of the transfer tooling in the vertical state.

7. The multi-directional static fatigue test fixture for a casing according to claim 6, characterized in that: The oblique mounting surface of the side panel tooling is provided with alignment positioning holes corresponding to the positioning holes at the four corners, and the bottom supporting surface is provided with alignment positioning holes corresponding to the positions of the positioning holes of the positioning hole group of the tooling bottom plate.

8. The multi-directional static fatigue test fixture for a casing according to claim 1, characterized in that: The transfer tooling includes a receiver part positioning cavity that is concave from the inside to the outside, the center of the receiver part positioning cavity is a central through hole, and positioning holes are distributed around the outer ring. The outer peripheral flange of the receiver part fits into the outer ring of the receiver part positioning cavity from the inside to the outside, and is fixed to the corresponding positioning hole from the inside to the outside by screws, and the outer end face of the inner sleeve of the receiver part is arranged to face outward.

9. A test method for static testing using a multi-directional static fatigue test fixture, wherein the test method uses the multi-directional static fatigue test fixture for a casing according to any one of claims 1 to 8, characterized in that : It pre-assembles the receiver parts, adapter tooling, pressure blocks, and fastening pressure plates to form the overall structure to be tested. Then, by switching the posture of the overall structure to be tested relative to the tooling base plate and replacing the corresponding pressure rod, a static test under the corresponding stress state can be carried out.

10. The test method for performing a static test using a multi-directional static fatigue test tool according to claim 1, characterized in that During the axial static test, the overall structure to be tested is arranged horizontally relative to the tooling base plate, and the pressure of the press is vertically transmitted to the press plate through the vertical pressure rod; During the radial static test, the overall structure to be tested is arranged vertically relative to the tooling base plate, and the pressure of the press is radially transmitted to the pressure plate through the C-shaped pressure rod; During the combined force static test, the overall structure to be tested is fixed obliquely to the oblique mounting surface of the side panel fixture, the bottom support surface of the side panel fixture is fixed to the upper surface of the fixture bottom plate, and the pressure of the press is transmitted to the pressure plate through the oblique pressure rod.

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