Clamping device for preventing heat treatment deformation of stainless steel controllable-pitch propeller blade

Abstract

The invention discloses a clamp for preventing heat treatment deformation of a stainless steel controllable-pitch propeller blade, and relates to the technical field of propeller manufacturing. Comprising upper supporting plates and lower outer supporting plates, the adjacent upper supporting plates are connected end to end to form an upper support disc, the adjacent lower outer supporting plates are connected end to end to form a lower outer support disc, the diameter of the upper support disc is smaller than that of the lower outer support disc, and the upper supporting plates are connected with the outer supporting plates through first telescopic adjusting rods. A paddle telescopic adjusting rod is movably installed on the outer supporting plate, and a paddle clamping jaw is installed at the end of the paddle telescopic adjusting rod. By selecting different numbers of upper support plates, the upper support plates with different sizes can be randomly spliced according to different flange plate diameters of propeller blades, and a second telescopic adjusting rod is arranged between the upper support plate and the lower support plate, so that the height of the whole support structure can be randomly adjusted according to the diameters of the controllable-pitch propeller blades; and the volume sizes of various heat treatment furnaces can be adapted.

Description

Technical Field

[0001] The invention discloses a clamp for preventing a stainless steel adjustable pitch propeller blade from deforming during heat treatment, and relates to the technical field of propeller manufacturing. Background Art

[0002] The opening of the Arctic route, which has short routes and shipping time, low transportation costs and high transportation efficiency, has attracted the attention of more and more ship owners. As a result, there will be more and more orders for ships suitable for ice navigation, and the demand for stainless steel propellers, which are the core components of the power system of ice-region ships, will also increase. The Arctic route has been covered by sea ice for many years, and the sea ice on the channel is dense and thick, and the road surface is both complex and special. Usually, ice-region ships will choose adjustable pitch propellers to match the ships. The advantage is that adjustable pitch propellers are easy to change the pitch and can cope with various complex sea ice channel conditions on the Arctic route; in addition, the blades and hubs of adjustable pitch propellers are separate individuals, and the cost of replacing a single blade is much lower than that of fixed pitch propellers.

[0003] However, stainless steel propellers that meet the requirements of ice-cold vessels need to undergo the most critical heat treatment process during the manufacturing process to obtain excellent mechanical properties. However, the adjustable pitch propeller blades for ice-cold vessels are characterized by being thick, wide, and having a complex spiral surface structure with extremely uneven thickness distribution between the blades and the flange. This structure is prone to severe deformation during the heat treatment process. The currently available high-temperature heat treatment of adjustable pitch propeller blades has the following disadvantages:

[0004] 1. The adjustable pitch propeller blades are difficult to hoist, the furnace loading time is long, the efficiency is low, the crane needs to be occupied, and manpower, material resources and energy are consumed. The operation is extremely complicated, which delays the manufacturing period and has extremely low production efficiency.

[0005] 2. The heat treatment of adjustable pitch propeller blades adopts the horizontal furnace loading method. The entire blade is heated extremely unevenly, with a large temperature difference. The thin parts of the blade and the back of the blade cool down quickly and have caused serious deformation. The transition between the working surface and the flange spherical surface R is too hot, so even with a hair dryer, it still cools very slowly, which can easily cause great stress and seriously affect the quality of the heat treatment.

[0006] 3. The heat treatment of adjustable pitch propeller blades adopts the vertical furnace loading method and needs to be placed on a full-bottom tray. The transition R (thickest) on both sides of the blade flange is heated unevenly and cannot obtain a sufficient cooling rate; the thin edges of the blades are very prone to high-temperature deformation, which seriously affects the quality of the heat treatment.

[0007] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a fixture that prevents the stainless steel adjustable pitch propeller blades from deforming during heat treatment, so as to overcome the problems existing in the existing methods. Summary of the invention

[0008] According to the above-mentioned prior art, which is labor-intensive, material-intensive, time-consuming and labor-intensive, and is accompanied by the technical problems of affecting the heat treatment quality and propeller performance, and serious blade deformation, a clamp is provided to prevent the stainless steel adjustable pitch propeller blade from deforming during heat treatment. The present invention mainly uses a special clamp to fix the adjustable pitch propeller blade, thereby preventing the propeller from deforming during the heat treatment process.

[0009] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0010] A clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment, wherein adjacent arc-shaped upper support plates 1 are connected end to end to form an upper support disk 4, and adjacent arc-shaped lower outer support plates 12 are connected end to end to form a lower outer support disk 13, the diameter of the upper support disk 4 is smaller than the diameter of the lower outer support disk 13, the upper support plate 1 is connected to the lower outer support plate 12 via a first telescopic adjustment rod 39, a blade telescopic adjustment rod 17 is movably installed on the lower outer support plate 12, and a blade clamp is installed at the end of the blade telescopic adjustment rod 17.

[0011] It also includes an arc-shaped lower inner support plate 5, and adjacent lower inner support plates 5 are connected end to end to form a lower inner support plate 6. The lower inner support plate 6 is located on the inner side of the lower outer support plate 13. The upper support plate 1 is connected to the lower inner support plate 5 through a second telescopic adjustment rod 7, and the lower outer support plate 12 is connected to the lower inner support plate 5 through a third telescopic adjustment rod 40.

[0012] The two ends of the upper support plate 1, the lower outer support plate 12 and the lower inner support plate 5 are respectively connected to the first spring 36 and the second spring 49, the end of the first spring 36 is installed with the external tooth 3, the external tooth 3 is provided with a groove 54, and the end of the second spring 49 is installed with the internal tooth 2 matching the groove 54.

[0013] The groove 54 is a spherical groove, and the outer tooth 3 is provided with a clamping groove 38 on both sides of the spherical groove. The inner tooth 2 is a spherical inner tooth 2, and a third spring 55 is installed inside the inner tooth 2. The two ends of the third spring 55 are respectively installed with a spring telescopic rod 37 that matches the clamping groove 38.

[0014] The upper support plate 1 is provided with a lateral lower tooth hole 24 and a lower tooth hole 11, the lower outer support plate 12 is provided with a central upper tooth hole 16 and a lateral upper tooth hole 19, the inner side of the lower outer support plate 12 is provided with an inner tooth hole 15, the lower inner support plate 5 is provided with an upper tooth hole 9, the outer side of the lower inner support plate 5 is provided with an outer tooth hole 14, the first telescopic adjustment rod 39 includes a first telescopic tube 41 and a first adjustment rod 42 which are sleeved with each other, the first outer layer inner tooth 50 at the end of the first telescopic tube 41 is installed in the central upper tooth hole 16, the first inner layer inner tooth 51 at the end of the first adjustment rod 42 is installed in the lateral lower tooth hole 24, the second telescopic adjustment rod 7 includes a second telescopic tube 43 and a second adjustment rod 44 which are sleeved with each other, the second outer layer inner tooth 8 at the end of the second telescopic tube 43 is installed in the upper tooth hole 9, and the second inner layer inner tooth 10 at the end of the second adjustment rod 44 is installed In the lower tooth hole 11, the third telescopic adjustment rod 40 includes a third telescopic tube 46 and a third adjustment rod 45 which are mutually sleeved, the third outer inner tooth 52 at the end of the third telescopic tube 46 is installed in the inner tooth hole 15, and the third inner inner tooth 53 at the end of the third adjustment rod 45 is installed in the outer tooth hole 14. The blade telescopic adjustment rod 17 includes a blade telescopic tube 47 and a blade adjustment rod 48 which are mutually sleeved, the fourth inner inner tooth 18 at the end of the blade adjustment rod 48 is installed in the lateral upper tooth hole 19, and the blade clamp is installed at the end of the blade telescopic tube 47. The inner layer buckle 22 is respectively installed on the first adjustment rod 42, the second adjustment rod 44, the third adjustment rod 45 and the blade adjustment rod 48, and the first telescopic tube 41, the second telescopic tube 43, the third telescopic tube 46 and the blade telescopic tube 47 are respectively installed with a fixed buckle ring 23 matching the inner layer buckle 22.

[0015] The end of the blade telescopic adjustment rod 17 is installed with a slide support plate 30 through a hinge folding shaft 27, and a slide 32 is installed on the slide support plate 30. The slide 32 is provided with a slide groove 33. Two locking clips 31 are installed on the slide 32 through the slide groove 33, and butterfly bolts 34 are installed on the two locking clips 31 respectively.

[0016] The wheel 25 is installed at the bottom of the lower outer support plate 12 through a locking buckle 26.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment. A wheel and a locking buckle are arranged under the lower outer support plate, so that the upper and lower integral support frame structures can be moved and fixed, which is convenient for loading adjustable pitch propeller blades of various diameters into and out of the heat treatment furnace;

[0019] 2. The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from being deformed during heat treatment. The upper support plate can be installed to arbitrarily adjust the size of the upper circular support plate according to the different flange diameters of the propeller blades;

[0020] 3. The present invention provides a clamp for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment. A telescopic adjustment rod is arranged between an upper circular support plate formed by splicing upper support plates and a lower inner circular support plate formed by splicing lower inner support plates. The height of the overall support structure can be adjusted arbitrarily according to the diameter of the adjustable pitch propeller blades to adapt to the volume size of various heat treatment furnaces.

[0021] 4. The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment. The upper support plate can be spliced ​​to form an upper circular support plate of any diameter, and is suitable for placing flange plates of adjustable pitch propeller blades of any diameter and weight to perform integral heat treatment on the stainless steel adjustable pitch propeller blades.

[0022] 5. The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment. A telescopic adjustment rod is arranged between a lower inner circular support disc formed by splicing lower inner support plates and a lower outer circular support disc formed by splicing lower outer support plates; a telescopic adjustment rod is arranged between an upper circular support disc formed by splicing upper support plates and a lower inner circular support disc formed by splicing lower inner support plates; a telescopic adjustment rod is arranged between a lower outer circular support disc formed by splicing lower outer support plates and an upper circular support disc formed by splicing upper support plates. The three connections form a stable triangular structure, which can ensure the stability of the overall support structure during heat treatment.

[0023] 6. The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from being deformed during heat treatment. All the support plates are easy to splice when in use and are easy to disassemble after use, saving space for storage.

[0024] 7. The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment. A hinge folding axis is provided at the outer end of the blade telescopic rod, and the angle of the slideway support plate can be adjusted arbitrarily. The guide edge and trailing edge of blades of any blade type are applicable. The locking clamp on the slideway support plate can be moved arbitrarily along the slideway groove in the slideway according to different blade types, and finally the guide edge and trailing edge of the blade are fixed to prevent the blade from deforming during the heat treatment process.

[0025] 8. The present invention provides a clamp for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment. The blade telescopic rod is applicable to the blade deformation prevention control during heat treatment of both left-hand adjustable pitch propellers and right-hand adjustable pitch propellers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is an overall structural diagram of a clamping device for preventing a stainless steel adjustable pitch propeller blade from deforming during heat treatment.

[0027] Figure 2 The invention is a front view of a blade telescopic adjustment rod for preventing a stainless steel adjustable pitch propeller blade from deforming during heat treatment.

[0028] Figure 3 The invention is a side view of a blade telescopic adjustment rod for preventing a stainless steel adjustable pitch propeller blade from deforming during heat treatment.

[0029] Figure 4 The invention is a top view of a blade telescopic adjustment rod for preventing a stainless steel adjustable pitch propeller blade from deforming during heat treatment.

[0030] Figure 5 The present invention is a structural diagram of a clamped second telescopic adjustment rod for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment.

[0031] Figure 6 The present invention is a structural diagram of a first telescopic adjustment rod for preventing deformation of blades of a stainless steel adjustable pitch propeller during heat treatment.

[0032] Figure 7 The present invention is a structural diagram of a third telescopic adjustment rod for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment.

[0033] Figure 8 The present invention is a structural diagram of an upper support plate for preventing stainless steel adjustable pitch propeller blades from deforming during heat treatment.

[0034] Fig. 9 The present invention is a structural diagram of a clamped lower inner support plate for preventing stainless steel adjustable pitch propeller blades from deforming during heat treatment.

[0035] Fig.10 The present invention is a structural diagram of a clamped lower outer support plate for preventing stainless steel adjustable pitch propeller blades from deforming during heat treatment.

[0036] In the figure: 1. upper support plate; 2. inner teeth; 3. outer teeth; 4. upper bracket plate; 5. lower inner support plate; 6. lower inner bracket plate; 7. second telescopic adjustment rod; 8. second outer inner teeth; 9. upper tooth hole; 10. second inner inner teeth; 11. lower tooth hole; 12. lower outer support plate; 13. lower outer bracket plate; 14. outer tooth hole; 15. inner tooth hole; 16. center upper tooth hole; 17. blade telescopic adjustment rod; 18. fourth inner inner teeth; 19. lateral upper tooth hole; 20. stainless steel adjustable pitch propeller blade; 21. blade flange; 22. inner buckle; 23. fixing buckle ring; 24. side lower tooth hole; 25. wheel; 26. locking buckle; 27. hinge folding axis; 28 , blade following edge; 29, fixing bolt; 30, slideway support plate; 31, locking clip; 32, slideway; 33, slideway groove; 34, butterfly bolt; 35, blade guide edge; 36, first spring; 37, spring telescopic rod; 38, slot; 39, first telescopic adjustment rod; 40, third telescopic adjustment rod; 41, first telescopic tube; 42, first adjustment rod; 43, second telescopic tube; 44, second adjustment rod; 45, third adjustment rod; 46, third telescopic tube; 47, blade telescopic tube; 48, blade adjustment rod; 49, second spring; 50, first outer layer inner teeth; 51, first inner layer inner teeth; 52, third outer layer inner teeth; 53, third inner layer inner teeth; 54, slot; 55, third spring. DETAILED DESCRIPTION

[0037] The present invention provides a clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment, such as Figure 1 As shown, a clamp for preventing stainless steel adjustable pitch propeller blades from deforming during heat treatment comprises an upper support plate 1, a lower inner support plate 5 and a lower outer support plate 12, as shown in FIG. Figure 8-10As shown, the two ends of the arc-shaped upper support plate 1, the lower outer support plate 12 and the lower inner support plate 5 are respectively connected to the first spring 36 and the second spring 49, the end of the first spring 36 is installed with the outer tooth 3, and the outer tooth 3 is provided with a groove 54, the end of the second spring 49 is installed with the inner tooth 2 matched with the groove 54, the groove 54 is a spherical groove, and the outer tooth 3 is provided with a clamping groove 38 on both sides of the spherical groove, the inner tooth 2 is a spherical inner tooth 2, and the inner tooth 2 is installed with a third spring 55, and the two ends of the third spring 55 are respectively installed with a spring telescopic rod 37 matched with the clamping groove 38. The inner teeth 2 of the adjacent upper support plates 1 are engaged with the grooves 54 of the outer teeth 3, and the spring telescopic rod 37 is inserted into the slot 38. When different numbers of upper support plates 1 are selected, the bending angles of the first spring 36 and the second spring 49 will change, so that different numbers of upper support plates 1 can be spliced ​​into upper bracket plates 4 of different sizes, so that the blade flanges 21 of stainless steel adjustable pitch propeller blades 20 of different diameters can be installed on the upper bracket plate 4. At the same time, the upper bracket plate 4 spliced ​​by the upper support plates 1 is not a full bottom tray, which can make the blade flange heat more evenly; similarly, the adjacent lower inner support plates 5 are connected end to end to form a lower inner bracket plate 6, and the adjacent lower outer support plates 12 are connected end to end to form a lower outer bracket plate 13. The diameter of the upper bracket plate 4 is smaller than the diameter of the lower outer bracket plate 13, and the lower inner bracket plate 6 is located on the inner side of the lower outer bracket plate 13; Figure 5-7As shown, the upper support plate 1 is connected to the lower outer support plate 12 through the first telescopic adjustment rod 39, and the upper support plate 1 is connected to the lower inner support plate 5 through the second telescopic adjustment rod 7, and the lower outer support plate 12 is connected to the lower inner support plate 5 through the third telescopic adjustment rod 40. The upper support plate 1 is provided with a lateral lower tooth hole 24 and a lower tooth hole 11, the lower outer support plate 12 is provided with a central upper tooth hole 16 and a lateral upper tooth hole 19, the inner side of the lower outer support plate 12 is provided with an inner tooth hole 15, the lower inner support plate 5 is provided with an upper tooth hole 9, and the outer side of the lower inner support plate 5 is provided with an outer tooth hole 14, the first telescopic adjustment rod 39 includes a first telescopic tube 41 and a first adjustment rod 42 which are sleeved with each other, the first outer inner tooth 50 at the end of the first telescopic tube 41 is installed in the central upper tooth hole 16, the first inner inner tooth 51 at the end of the first adjustment rod 42 is installed in the lateral lower tooth hole 24, and the second telescopic adjustment rod 7 includes a first telescopic tube 41 and a first adjustment rod 42 which are sleeved with each other. The second telescopic tube 43 and the second adjustment rod 44, the second outer inner teeth 8 at the end of the second telescopic tube 43 are installed in the upper tooth hole 9, the second inner inner teeth 10 at the end of the second adjustment rod 44 are installed in the lower tooth hole 11, the third telescopic adjustment rod 40 includes a third telescopic tube 46 and a third adjustment rod 45 which are connected to each other, the third outer inner teeth 52 at the end of the third telescopic tube 46 are installed in the inner tooth hole 15, and the third inner inner teeth 53 at the end of the third adjustment rod 45 are installed in the outer tooth hole 14. The telescopic adjustment rods can improve the stability of the clamping on the one hand, and can adjust the size of the clamping on the other hand to meet the actual needs. The first telescopic adjustment rod 39, the second telescopic adjustment rod 7 and the third telescopic adjustment rod 40 form a stable triangular structure as a whole, which can ensure the stability of the overall heat treatment support structure. All the support frames are easy to splice when in use, easy to disassemble after use, and save space for storage.

[0038] like Figure 2-4 As shown, a blade telescopic adjustment rod 17 is movably mounted on the lower outer support plate 12, and a blade clamp is mounted on the end of the blade telescopic adjustment rod 17. The blade telescopic adjustment rod 17 includes a blade telescopic tube 47 and a blade adjustment rod 48 which are sleeved with each other, the fourth inner layer inner teeth 18 at the end of the blade adjustment rod 48 are mounted in the side upper tooth hole 19, the blade clamp is mounted on the end of the blade telescopic tube 47, the first adjustment rod 42, the second adjustment rod 44, the third adjustment rod 45 and the blade adjustment rod 48 are respectively mounted with inner layer buckles 22, and the first telescopic tube 41, the second telescopic tube 43, the third telescopic tube 46 and the blade telescopic tube 47 are respectively mounted with fixed buckle rings 23 which match the inner layer buckle 22. The length of each telescopic adjustment rod can be adjusted through the inner layer buckle 22 and the fixed buckle ring 23.

[0039] The end of the blade telescopic adjustment rod 17 is installed with a slide support plate 30 through a hinge folding shaft 27, and the slide support plate 30 is installed on the hinge folding shaft 27 through a fixing bolt 29. The angle of the slide support plate 30 can be adjusted arbitrarily through the hinge folding shaft 27, and any blade guide edge 35 and blade following edge 28 are applicable. A slide 32 is installed on the slide support plate 30, and a slide groove 33 is provided on the slide 32. Two locking clips 31 are installed on the slide groove 33. The two locking clips 31 are respectively installed with butterfly bolts 34 relative to each other, and the locking clips 31 are aligned with each other. It should be placed at the blade trailing edge 28 and blade guide edge 35 of the stainless steel adjustable pitch propeller blade 20. After adjusting the hinge folding axis 27 at the end of the blade telescopic adjustment rod 17 to a suitable angle and following the blade trailing edge 28 and blade guide edge 35, tighten the fixing bolt 29 to fix the slideway support plate 30. After moving the two locking clips 31 from the outside to the inside along the slideway groove 33 in the slideway 32 to clamp the blade trailing edge 28 and blade guide edge 35 at the easily deformed position, use the butterfly bolt 34 to fix the locking clip 31 to clamp the blade to prevent the blade from deforming during the heat treatment process. The locking clip 31 on the slideway support plate 30 can be arbitrarily moved along the slideway groove in the slideway according to different blade shapes, and finally the blade guide edge 35 and the blade trailing edge blade 28 are fixed to prevent the blade from deforming during the heat treatment process. The blade telescopic adjustment rod 17 is applicable to the blade heat treatment anti-deformation control of both left-handed adjustable pitch propellers and right-handed adjustable pitch propellers.

[0040] The bottom of the lower outer support plate 12 is provided with a wheel 25 through a locking buckle 26, so as to facilitate movement and loading of stainless steel adjustable pitch propeller blades of different diameters and weights into and out of the heat treatment furnace.

[0041] The method mentioned in the present invention can be used to prevent deformation of single-piece rotating body complex curved surface castings during heat treatment, such as large turbine blades, large fan blades, water pump impellers, etc.; and can be used for heat treatment of any stainless steel material.

[0042] The present invention is described by way of embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment, characterized in that: Adjacent arc-shaped upper support plates (1) are connected end to end to form an upper support plate (4), and adjacent arc-shaped lower outer support plates (12) are connected end to end to form a lower outer support plate (13). The diameter of the upper support plate (4) is smaller than the diameter of the lower outer support plate (13). The upper support plate (4) is connected to the lower outer support plate (13) via a first telescopic adjustment rod (39). A blade telescopic adjustment rod (17) is movably mounted on the lower outer support plate (12), and a blade clamp is mounted at the end of the blade telescopic adjustment rod (17).

2. The clamping device for preventing the blades of a stainless steel adjustable pitch propeller from deforming during heat treatment according to claim 1 is characterized in that: It also includes an arc-shaped lower inner support plate (5), and adjacent lower inner support plates (5) are connected end to end to form a lower inner support plate (6), and the lower inner support plate (6) is located on the inner side of the lower outer support plate (13). The upper support plate (1) is connected to the inner support plate (5) via a second telescopic adjustment rod (7), and the lower outer support plate (12) is connected to the lower inner support plate (5) via a third telescopic adjustment rod (40).

3. The clamping device for preventing the blades of a stainless steel controllable pitch propeller from being deformed during heat treatment according to claim 2, characterized in that: The ends of the upper support plate (1), the lower outer support plate (12) and the lower inner support plate (5) are respectively connected to a first spring (36) and a second spring (49); an outer tooth (3) is installed at the end of the first spring (36); a groove (54) is provided on the outer tooth (3); and an inner tooth (2) matched with the groove (54) is installed at the end of the second spring (49).

4. The clamping device for preventing the blades of a stainless steel controllable pitch propeller from being deformed during heat treatment according to claim 3 is characterized in that: The groove (54) is a spherical groove, and the outer teeth (3) are provided with clamping grooves (38) on both sides of the spherical groove. The inner teeth (2) are spherical inner teeth (2), and a third spring (55) is installed inside the inner teeth (2). Both ends of the third spring (55) are respectively provided with spring telescopic rods (37) matched with the clamping grooves (38).

5. The clamping device for preventing the blades of a stainless steel controllable pitch propeller from being deformed during heat treatment according to claim 2, characterized in that: The upper support plate (1) is provided with a lateral lower tooth hole (24) and a lower tooth hole (11), the lower outer support plate (12) is provided with a central upper tooth hole (16) and a lateral upper tooth hole (19), the inner side of the lower outer support plate (12) is provided with an inner tooth hole (15), the lower inner support plate (5) is provided with an upper tooth hole (9), the outer side of the lower inner support plate (5) is provided with an outer tooth hole (14), and the first telescopic adjustment rod (39) includes a first telescopic tube (41) and a first adjustment rod (42) which are sleeved together. The first outer inner teeth (50) at the end of the first telescopic tube (41) are installed in the central upper tooth hole (16), the first inner inner teeth (51) at the end of the first adjustment rod (42) are installed in the side lower tooth hole (24), the second telescopic adjustment rod (7) includes a second telescopic tube (43) and a second adjustment rod (44) which are sleeved with each other, the second outer inner teeth (8) at the end of the second telescopic tube (43) are installed in the upper tooth hole (9), and the second inner inner teeth (10) at the end of the second adjustment rod (44) are installed in the side lower tooth hole (24). The third telescopic adjustment rod (40) is installed in the lower tooth hole (11), and includes a third telescopic tube (46) and a third adjustment rod (45) which are sleeved together. The third outer inner teeth (52) at the end of the third telescopic tube (46) are installed in the inner tooth hole (15), and the third inner inner teeth (53) at the end of the third adjustment rod (45) are installed in the outer tooth hole (14). The blade telescopic adjustment rod (17) includes a blade telescopic tube (47) and a blade adjustment rod (48) which are sleeved together. The blade adjustment rod (48) The fourth inner layer inner tooth (18) at the end is installed in the lateral upper tooth hole (19), the blade clamp is installed at the end of the blade telescopic tube (47), the first adjustment rod (42), the second adjustment rod (44), the third adjustment rod (45) and the blade adjustment rod (48) are each installed with an inner layer buckle (22), and the first telescopic tube (41), the second telescopic tube (43), the third telescopic tube (46) and the blade telescopic tube (47) are each installed with a fixed buckle ring (23) matched with the inner layer buckle (22).

6. The clamping device for preventing the blades of a stainless steel controllable pitch propeller from deforming during heat treatment according to claim 1, characterized in that: The end of the blade telescopic adjustment rod (17) is installed with a slideway support plate (30) through a hinge folding shaft (27), a slideway (32) is installed on the slideway support plate (30), a slideway groove (33) is provided on the slideway (32), two locking clamps (31) are installed on the slideway (32) through the slideway groove (33), and butterfly bolts (34) are installed on the two locking clamps (31) respectively.

7. The clamping device for preventing the blades of a stainless steel controllable pitch propeller from being deformed during heat treatment according to claim 1, characterized in that: The bottom of the lower outer support plate (12) is provided with a wheel (25) via a locking buckle (26).

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