Reversible deformation sand blasting protection tool capable of adjusting size

Abstract

The reversible deformation sand blasting protection tool comprises a base, a circular middle cavity is formed in the middle of the base, and a first supporting arm, a second supporting arm, a third supporting arm and a fourth supporting arm which are arranged in a cross shape are integrally connected to the periphery of the base; the first supporting arm and the third supporting arm are opposite in position and form a first anti-deformation supporting arm set in the X-axis direction, and a first supporting sliding block is installed in the first supporting arm. The second supporting arm and the fourth supporting arm are opposite in position and form a second reversible deformation supporting arm set in the Y-axis direction, and a second supporting sliding block is installed in the second supporting arm. A rotating wheel is rotatably mounted in the circular middle cavity and is divided into a first fan-shaped part and a second fan-shaped part, the radius of the first fan-shaped part is larger than that of the second fan-shaped part, and the angle of the first fan-shaped part is 90-270 degrees. According to the utility model, the inner side wall of the end part of the square-tube-shaped workpiece can be outwards supported, so that the bad problem that the end part of the square-tube-shaped workpiece is inwards sunken and deformed in the sand blasting process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing equipment for square pipe-shaped workpieces, and particularly relates to an anti-deformation sandblasting protection tooling capable of adjusting dimensions. Background Art

[0002] As Figure 1 shown, a square pipe-shaped workpiece 100 in current processing is provided. During the processing of the square pipe-shaped workpiece 100, there is a process of placing the square pipe-shaped workpiece in a sandblasting machine and performing sandblasting on the outer sides of both ends of the square pipe-shaped workpiece 100 to process a set outer shape and pattern. However, during the sandblasting process, the following problems will occur: Since the abrasive material will continuously apply pressure to the outer sides of both ends of the square pipe-shaped workpiece 100, after the sandblasting process ends, the side walls of both ends of the square pipe-shaped workpiece 100 will have varying degrees of inward concave deformation problems, resulting in defects. In view of this, there is an urgent need in the art for a protection device that can prevent the two ends of the square pipe-shaped workpiece from deforming inward during the sandblasting process. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an anti-deformation sandblasting protection tooling capable of adjusting dimensions in view of the deficiencies in the above-mentioned prior art. The anti-deformation sandblasting protection tooling can support the inner side walls of the ends of the square pipe-shaped workpiece outward to prevent the problem of inward concave deformation of the ends of the square pipe-shaped workpiece during the sandblasting process.

[0004] To solve the above technical problem, the technical solution of the utility model is: An anti-deformation sandblasting protection tooling capable of adjusting dimensions, including a base. A circular middle cavity is provided in the middle of the base. The outer periphery of the base is integrally connected with a first support arm, a second support arm, a third support arm, and a fourth support arm arranged in a "cross" shape. The first support arm and the third support arm are opposite in position and form a first anti-deformation support arm group along the X-axis direction. The first support arm is provided with a first sliding groove penetrating the first support arm along the X-axis direction. A first support slider is slidably installed in the first sliding groove. The inner end of the first support slider extends into the circular middle cavity. The length of the first support slider is greater than the length of the first support arm. The second support arm and the fourth support arm are opposite in position and form a second anti-deformation support arm group along the Y-axis direction. The second support arm is provided with a second sliding groove penetrating the second support arm along the Y-axis direction. A second support slider is slidably installed in the second sliding groove. The inner end of the second support slider extends into the circular middle cavity. The length of the second support slider is greater than the length of the second support arm. A rotating wheel is rotatably installed in the circular middle cavity. The rotating wheel is divided into a first sector part and a second sector part. The radius of the first sector part is greater than the radius of the second sector part. The outer side surface of the first sector part abuts and cooperates with the inner ends of the first support slider and the second support slider. The angle of the first sector part is 90 - 270 degrees.

[0005] Preferably, the first support slider is connected with a first connecting piece extending downward, the second support slider is connected with a second connecting piece extending downward, the middle of the rotating wheel is connected with a third connecting piece extending downward, a first spring is connected between the first connecting piece and the third connecting piece, and a second spring is connected between the first connecting piece and the third connecting piece.

[0006] Preferably, a first slider baffle for preventing the first support slider from loosening downward is installed at the lower end of the first support arm. The first slider baffle is provided with a first long hole, and the first connecting piece movably passes through the first long hole; a second slider baffle for preventing the second support slider from loosening downward is installed at the lower end of the second support arm. The second slider baffle is provided with a second long hole, and the second connecting piece movably passes through the second long hole.

[0007] Preferably, convex arc surfaces are provided at the inner ends of the first support slider and the second support slider, and a curved surface with a natural transition is provided at the connection between the outer side surfaces of the first sector portion and the second sector portion.

[0008] Preferably, an annular groove is provided at the upper edge portion of the circular middle cavity. The upper end of the rotating wheel is integrally connected to a disc, and the disc is rotatably installed within the annular groove.

[0009] Preferably, a retaining cover plate for preventing the rotating wheel from loosening upward is connected to the lower end of the rotating wheel. The third connecting piece passes through the retaining cover plate and locks the retaining cover plate.

[0010] Preferably, the retaining cover plate is a circular retaining cover plate. The diameter of the retaining cover plate is larger than the inner diameter of the circular middle cavity, and there is a gap between the retaining cover plate and the lower side of the base.

[0011] Preferably, the rotating wheel and the disc are provided with a connecting mechanism for connecting an external driving mechanism, and the position of the connecting mechanism is offset from the central axis of the rotating wheel.

[0012] Preferably, retaining pieces are respectively installed on the upper sides of the outermost ends of the first support arm, the second support arm, the third support arm and the fourth support arm by screws, and one end of the retaining piece extends outward from the outermost end of the first support arm, the second support arm, the third support arm or the fourth support arm.

[0013] The beneficial effects of the present utility model are as follows: The present utility model can place the overall anti-deformation sandblasting protection tooling inside both ends of a square tube-shaped workpiece. By using the rotating wheel to adjust the length dimensions of the first anti-deformation support arm group and the second anti-deformation support arm group, the first anti-deformation support arm group can support a pair of inner sidewalls of the square tube-shaped workpiece outward, and the second anti-deformation support arm group can support the other pair of inner sidewalls of the square tube-shaped workpiece outward; Since the first support arm is provided with a first chute penetrating the first support arm along the X-axis direction, a first support slider is slidably installed inside the first chute, the inner end of the first support slider extends into the circular middle cavity, the length of the first support slider is greater than the length of the first support arm, the second support arm is provided with a second chute penetrating the second support arm along the Y-axis direction, a second support slider is slidably installed inside the second chute, the inner end of the second support slider extends into the circular middle cavity, the length of the second support slider is greater than the length of the second support arm, the rotating wheel is rotatably installed inside the circular middle cavity, the radius of the first sector part of the rotating wheel is greater than the radius of the second sector part, the outer side surface of the first sector part abuts and cooperates with the inner ends of the first support slider and the second support slider, and the angle of the first sector part is 90 - 270 degrees; Therefore, when the anti-deformation sandblasting protection tooling needs to be inserted into both ends of the square tube-shaped workpiece, the rotating wheel can be rotated to a set first angle so that the second sector part faces the inner ends of the first support slider and the second support slider. At this time, the first support slider and the second support slider can slide inward for a certain distance, and the overall length dimensions of the first anti-deformation support arm group and the second anti-deformation support arm group are smaller, and the anti-deformation sandblasting protection tooling can be smoothly inserted into both ends of the square tube-shaped workpiece; When it is necessary to use the first anti-deformation support arm group to support a pair of inner sidewalls of the square tube-shaped workpiece outward and use the second anti-deformation support arm group to support the other pair of inner sidewalls of the square tube-shaped workpiece outward, the rotating wheel can be rotated to a set second angle so that the first sector part faces the inner ends of the first support slider and the second support slider. At this time, the first support slider and the second support slider slide outward for a certain distance under the abutting action of the first sector part, and the overall length dimensions of the first anti-deformation support arm group and the second anti-deformation support arm group become larger. Furthermore, the first anti-deformation support arm group forms an outward support force on a pair of inner sidewalls of the square tube-shaped workpiece, and the second anti-deformation support arm group also forms an outward support force on the other pair of inner sidewalls of the square tube-shaped workpiece, thereby preventing the problem that the two ends of the square tube-shaped workpiece are sunken and deformed inward during the sandblasting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a square tube-shaped workpiece.

[0015] Figure 2 It is one of the overall structural schematic diagrams of the present utility model.

[0016] Figure 3 It is the other overall structural schematic diagram of the present utility model.

[0017] Figure 4 One of the schematic diagrams of the dispersion structure of the present utility model.

[0018] Figure 5 Another schematic diagram of the dispersion structure of the present utility model.

[0019] Figure 6 The bottom view structure diagram of the rotating wheel.

[0020] Figure 7 Schematic diagram of the present utility model placed inside the end of a square tube-shaped workpiece and supporting the inner wall outward. Specific embodiments

[0021] The structural principle and working principle of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] In the description of the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model. The terms "X-axis direction" and "Y-axis direction" refer to Figure 2 the directions indicated by the coordinate arrows in

[0023] Such as Figures 2 - 6As shown in the figure, the utility model relates to an anti-deformation sandblasting protection tooling with adjustable size, which includes a base 1. A circular middle cavity 11 is provided in the middle of the base 1. The outer periphery of the base 1 is integrally connected with a first support arm 2, a second support arm 3, a third support arm 4 and a fourth support arm 5 arranged in a "cross" shape. The first support arm 2 and the third support arm 4 are opposite in position and form a first anti-deformation support arm group along the X-axis direction. The first support arm 2 is provided with a first chute 21 penetrating the first support arm 2 along the X-axis direction. A first support slider 22 is slidably installed in the first chute 21. The inner end of the first support slider 22 extends into the circular middle cavity 11. The length of the first support slider 22 is greater than the length of the first support arm 2. The second support arm 3 and the fourth support arm 5 are opposite in position and form a second anti-deformation support arm group along the Y-axis direction. The second support arm 3 is provided with a second chute 31 penetrating the second support arm 3 along the Y-axis direction. A second support slider 32 is slidably installed in the second chute 31. The inner end of the second support slider 32 extends into the circular middle cavity 11. The length of the second support slider 32 is greater than the length of the second support arm 3. A rotating wheel 6 is rotatably installed in the circular middle cavity 11. The rotating wheel 6 is divided into a first sector part 61 and a second sector part 62. The radius of the first sector part 61 is greater than the radius of the second sector part 62. The outer side surface of the first sector part 61 abuts against the inner ends of the first support slider 22 and the second support slider 32. The angle of the first sector part 61 is 90-270 degrees. The difference between the radii of the first sector part 61 and the second sector part 62 is 1-50 mm, preferably 5-20 mm. With reference to Figure 1 and Figure 7, the utility model can place the whole reverse deformation sandblasting protection tooling inside both ends of the square tube-shaped workpiece 100. The length dimensions of the first reverse deformation support arm group and the second reverse deformation support arm group are adjusted by the rotating wheel 6, so that the first reverse deformation support arm group supports a pair of inner side walls of the square tube-shaped workpiece 100 outward, and the second reverse deformation support arm group supports the other pair of inner side walls of the square tube-shaped workpiece 100 outward; when the reverse deformation sandblasting protection tooling needs to be placed inside both ends of the square tube-shaped workpiece 100, the rotating wheel 6 can be rotated to a set first angle, so that the second sector part 62 faces the inner ends of the first support slider 22 and the second support slider 32. At this time, the first support slider 22 and the second support slider 32 can slide inward for a certain distance, and the overall length dimension of the first reverse deformation support arm group and the second reverse deformation support arm group is smaller, and the reverse deformation sandblasting protection tooling can be smoothly placed inside both ends of the square tube-shaped workpiece 100; when it is necessary to support a pair of inner side walls of the square tube-shaped workpiece 100 outward by the first reverse deformation support arm group and support the other pair of inner side walls of the square tube-shaped workpiece 100 outward by the second reverse deformation support arm group, the rotating wheel 6 can be rotated to a set second angle, so that the first sector part 61 faces the inner ends of the first support slider 22 and the second support slider 32. At this time, the first support slider 22 and the second support slider 32 slide outward for a certain distance under the abutting action of the first sector part 61, and the overall length dimension of the first reverse deformation support arm group and the second reverse deformation support arm group becomes larger, so that the first reverse deformation support arm group forms an outward supporting force on a pair of inner side walls of the square tube-shaped workpiece 100, and the second reverse deformation support arm group also forms an outward supporting force on the other pair of inner side walls of the square tube-shaped workpiece 100, thereby preventing the square tube-shaped workpiece 100 from having the problem of inward concave deformation at both ends during the sandblasting process.

[0024] As Figures 2 - 6 shown, the first support slider 22 is connected with a first connecting piece 23 extending downward, the second support slider 32 is connected with a second connecting piece 33 extending downward, the middle of the rotating wheel 6 is connected with a third connecting piece 63 extending downward, a first spring 24 is connected between the first connecting piece 22 and the third connecting piece 63, and a second spring 34 is connected between the first connecting piece 22 and the third connecting piece 63. By arranging the first spring 24 and the second spring 34, when the rotating wheel 6 rotates to the set first angle, that is, when the second sector part 62 of the rotating wheel 6 faces the first support slider 22 and the second support slider 32, the first spring 24 can automatically pull the first support slider 22 to slide inward, and the second spring 34 can automatically pull the second support slider 32 to slide inward.

[0025] As Figures 2 - 6As shown, a first slider baffle 25 for preventing the first supporting slider 22 from being loosened downward is installed at the lower end of the first supporting arm 2, the first slider baffle 25 is provided with a first long hole 26, and the first connecting member 23 movably passes through the first long hole 26; a second slider baffle 35 for preventing the second supporting slider 32 from being loosened downward is installed at the lower end of the second supporting arm 3, the second slider baffle 35 is provided with a second long hole 36, and the second connecting member 33 movably passes through the second long hole 36. The first slider baffle 25 is fixedly connected to the first supporting arm 2 by screws, and the second slider baffle 35 is also fixedly connected to the second supporting arm 3 by screws.

[0026] like Figures 2 - 6 As shown, the inner ends of the first supporting slider 22 and the second supporting slider 32 are both provided with convex arc surfaces 27, 37, and the connection between the outer side surface of the first fan-shaped portion 61 and the outer side surface of the second fan-shaped portion 62 is provided with a naturally transitioned curved surface 64; during the rotation of the rotating wheel 6, when the inner end of the first supporting slider 22 or the second supporting slider 22 slides to the connection transition point between the outer side surfaces of the first fan-shaped portion 61 and the second fan-shaped portion 62, the convex arc surfaces 27, 37 of the first supporting slider 22 or the second supporting slider 22 can slide and cooperate with the curved surface 64 of the rotating wheel 6 to achieve a natural transition.

[0027] like Figures 2 - 7 As shown, the upper edge of the circular cavity 11 is provided with an annular groove 12, and the upper end of the rotating wheel 6 is integrally connected to the disc 65, and the disc 65 is rotatably installed in the annular groove 12. The diameter of the disc 65 is larger than the maximum diameter of the rotating wheel 6. By providing the annular groove 12 and the disc 65, the rotating wheel 6 can be prevented from being loosened downward in the circular cavity 11 of the base 1. The upper side of the disc 65 is also provided with a plurality of arrows, sizes or scales to indicate the rotation position and size of the rotating wheel 6.

[0028] like Figures 2 - 6 As shown, the lower end of the rotating wheel 6 is connected with a blocking cover plate 8 for preventing the rotating wheel 6 from loosening upwards, and the third connecting member 63 passes through the blocking cover plate 8 and locks the blocking cover plate 8. The blocking cover plate 8 is a circular blocking cover plate, and the diameter of the blocking cover plate 8 is larger than the inner diameter of the circular middle cavity 11. There is a relatively narrow gap between the blocking cover plate 8 and the lower side of the base 1. The method for setting the gap is to make the height of the rotating wheel 6 slightly larger than the height of the circular middle cavity 11. The gap can reduce the contact between the upper side of the blocking cover plate 8 and the lower side of the base 1, so as to reduce friction and improve the flexibility of rotation.

[0029] like Figure 2 , Figures 4 - 6As shown, the rotating wheel 6 and the disc 65 are provided with hexagon socket holes 66 for connecting an external driving mechanism, and the position of the hexagon socket hole 66 deviates from the central axis of the rotating wheel. When it is necessary to rotate the rotating wheel 6, an external hexagon wrench (not shown in the figure) is inserted into the hexagon socket hole 66 of the rotating wheel 6, and the rotating wheel 6 can be rotated by pulling the external hexagon wrench, and the operation is very convenient; in addition, the hexagon socket hole 66 deviates from the central axis of the rotating wheel, which can make the rotating wheel 6 easier to rotate. It should be noted that the present invention is not limited to providing the hexagon socket hole 66 on the rotating wheel 6 and the disc 65, and other connecting mechanisms can also be provided, such as rectangular holes, triangular holes, connecting columns, connecting buckles, etc. The external driving mechanism is not limited to the external hexagon wrench, and any driving mechanism that can connect the connecting mechanism and drive the rotating wheel 6 to rotate can be used.

[0030] As a preferred embodiment of the present invention, the angle of the first sector portion 61 of the rotating wheel 6 is 120 - 240 degrees, more preferably 170 - 200 degrees, so that the rotating wheel 6 can rotate more stably within the circular middle cavity 11 of the base 1.

[0031] As Figures 2 - 5 , Figure 7 shown, on the upper sides of the outermost ends of the first support arm 2, the second support arm 3, the third support arm 4, and the fourth support arm 5, retaining plates 9 are respectively installed by screws, and one end of the retaining plate 9 extends outwards beyond the outermost end of the first support arm 2, the second support arm 3, the third support arm 4, or the fourth support arm 5. Preferably, the retaining plate 9 is a circular retaining plate. The purpose of setting the retaining plate 9 is to block and position when the anti-deformation sandblasting protection tooling is inserted into the end of the square tubular workpiece 100, referring to Figure 7 , to prevent the anti-deformation sandblasting protection tooling from entering too deep into the square tubular workpiece 100.

[0032] Combined with reference to Figures 1 - 7 , a method of using the adjustable-size anti-deformation sandblasting protection tooling of the present invention includes the following method steps:

[0033] S1. Rotate the rotating wheel 6 within the circular middle cavity 11 of the base 1 to a set first angle, so that the second sector portion of the rotating wheel 6 faces the inner ends of the first support slider 22 and the second support slider 32;

[0034] S2. Pull the first support slider 22 to slide inwards along the first chute 21. Stop sliding after the outer side of the first support slider 22 contacts the outer side of the second sector portion 62 of the rotating wheel 6. Pull the second support slider 32 to slide inwards along the second chute 31. Stop sliding after the outer side of the first support slider 22 contacts the outer side of the second sector portion 62 of the rotating wheel 6. In this step, the pulling force for the first support slider 22 to slide inwards is preferably provided by the first spring 24, and the pulling force for the second support slider 32 to slide inwards is preferably provided by the second spring 34.

[0035] S3. Place the anti-deformation sandblasting protection device into the end of the square tube-shaped workpiece 100, and align the outer ends of the first support arm 2, the second support arm 3, the third support arm 4, and the fourth support arm 5 with the middle parts of the four inner side walls of the square tube-shaped workpiece 100 respectively. At this time, the overall length of the first anti-deformation support arm group is less than or equal to the distance between a pair of inner side walls of the square tube-shaped workpiece 100, and the overall length of the second anti-deformation support arm group is less than or equal to the distance between the other pair of inner side walls of the square tube-shaped workpiece 100. In this step, the overall length of the first anti-deformation support arm group is 1 - 40 mm less than the distance between a pair of inner side walls of the square tube-shaped workpiece 100, preferably 3 - 15 mm, and the overall length of the second anti-deformation support arm group is 1 - 40 mm less than the distance between the other pair of inner side walls of the square tube-shaped workpiece 100, preferably 3 - 15 mm.

[0036] S4. Rotate the rotating wheel 6 to a set second angle so that the first sector portion 61 of the rotating wheel 6 abuts against the inner ends of the first support slider 22 and the second support slider 32. During the rotation of the rotating wheel 6, the first sector portion 61 pushes the first support slider 22 and the second support slider 32 to move outwards by a distance equal to the difference in radius between the first sector portion 61 and the second sector portion 62. The outer ends of the first support slider 22 and the second support slider 32 are pushed outwards. At this time, the overall length of the first anti-deformation support arm group is greater than the distance between a pair of inner side walls of the square tube-shaped workpiece 100, and the overall length of the second anti-deformation support arm group is greater than the distance between a pair of inner side walls of the square tube-shaped workpiece 100. The first anti-deformation support arm group forms an outward support force on a pair of inner side walls of the square tube-shaped workpiece 100, and the second anti-deformation support arm group also forms an outward support force on the other pair of inner side walls of the square tube-shaped workpiece 100. In this step, the overall length of the first anti-deformation support arm group is 1 - 15 mm greater than the distance between a pair of inner side walls of the square tube-shaped workpiece 100, preferably 2 - 5 mm, and the overall length of the second anti-deformation support arm group is 1 - 15 mm greater than the distance between the other pair of inner side walls of the square tube-shaped workpiece 100, preferably 2 - 5 mm.

[0037] S5. Feed the square tube-shaped workpiece 100 and the anti-deformation sandblasting protection tooling into the sandblasting machine together. The sandblasting machine performs sandblasting operations on the outer sidewalls of the ends of the square tube-shaped workpiece 100. After the sandblasting operations stop, take out the square tube-shaped workpiece 100 and the anti-deformation sandblasting protection tooling together;

[0038] S6. Rotate the rotating wheel 6 to the set first angle again, so that the second sector portion 62 of the rotating wheel 6 faces the inner ends of the first support slider 22 and the second support slider 32;

[0039] S7. Pull the first support slider 22 to slide inward along the first chute 21. Stop sliding after the first support slider 22 contacts the outer side surface of the second sector portion 62 of the rotating wheel 6; Pull the second support slider 32 to slide inward along the second chute 31. Stop sliding after the first support slider 22 contacts the outer side surface of the second sector portion 62 of the rotating wheel 6; In this step, the pulling force for the first support slider 22 to slide inward is preferably provided by the first spring 24, and the pulling force for the second support slider 32 to slide inward is preferably provided by the second spring 34;

[0040] S8. Take out the anti-deformation sandblasting protection tooling from the end of the square tube-shaped workpiece 100.

[0041] It should be noted that when sandblasting operations need to be performed on one end of the square tube-shaped workpiece 100, one anti-deformation sandblasting protection tooling of the present invention is correspondingly used; when sandblasting operations need to be performed on both ends of the square tube-shaped workpiece 100, two anti-deformation sandblasting protection toolings of the present invention are correspondingly used.

[0042] The above is only a preferred embodiment of the present invention. Any minor modifications, equivalent changes, and decorations made to the above embodiments based on the technical solution of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. An adjustable reverse deformation sandblasting protection tooling, characterized in that: It includes a base. A circular middle cavity is provided in the middle of the base. The outer periphery of the base is integrally connected with a first support arm, a second support arm, a third support arm and a fourth support arm arranged in a "cross" shape. The first support arm and the third support arm are opposite in position and form a first anti-deformation support arm group along the X-axis direction. The first support arm is provided with a first chute penetrating through the first support arm along the X-axis direction. A first support slider is slidably installed in the first chute. The inner end of the first support slider extends into the circular middle cavity. The length of the first support slider is greater than the length of the first support arm. The second support arm and the fourth support arm are opposite in position and form a second anti-deformation support arm group along the Y-axis direction. The second support arm is provided with a second chute penetrating through the second support arm along the Y-axis direction. A second support slider is slidably installed in the second chute. The inner end of the second support slider extends into the circular middle cavity. The length of the second support slider is greater than the length of the second support arm. A rotating wheel is rotatably installed in the circular middle cavity. The rotating wheel is divided into a first sector part and a second sector part. The radius of the first sector part is greater than the radius of the second sector part. The outer side surface of the first sector part abuts and cooperates with the inner ends of the first support slider and the second support slider. The angle of the first sector part is 90 - 270 degrees. The difference between the radii of the first sector part and the second sector part is 1 - 50 mm.

2. The adjustable-size anti-deformation sandblasting protection tooling according to claim 1, characterized in that: The first support slider is connected with a first connecting piece extending downward. The second support slider is connected with a second connecting piece extending downward. The middle of the rotating wheel is connected with a third connecting piece extending downward. A first spring is connected between the first connecting piece and the third connecting piece. A second spring is connected between the first connecting piece and the third connecting piece.

3. The adjustable-size anti-deformation sandblasting protection tooling according to claim 2, characterized in that: A first slider baffle for preventing the first support slider from loosening downward is installed at the lower end of the first support arm. The first slider baffle is provided with a first long hole. The first connecting piece movably passes through the first long hole. A second slider baffle for preventing the second support slider from loosening downward is installed at the lower end of the second support arm. The second slider baffle is provided with a second long hole. The second connecting piece movably passes through the second long hole.

4. The adjustable-size anti-deformation sandblasting protection tooling according to claim 2, wherein: Convex arc surfaces are provided at the inner ends of the first support slider and the second support slider. A curved surface with a natural transition is provided at the connection between the outer side surface of the first sector part and the outer side surface of the second sector part.

5. The adjustable-size anti-deformation sandblasting protection tooling according to claim 2, characterized in that: An annular groove is provided at the upper edge part of the circular middle cavity. The upper end of the rotating wheel is integrally connected to a disc. The disc is rotatably installed in the annular groove.

6. The adjustable-size anti-deformation sandblasting protection tooling according to claim 5, characterized in that: A retaining cover plate for preventing the rotating wheel from loosening upward is connected to the lower end of the rotating wheel. The third connecting piece passes through the retaining cover plate and locks the retaining cover plate.

7. The adjustable-size anti-deformation sandblasting protection tooling according to claim 6, wherein: The retaining cover plate is a circular retaining cover plate. The diameter of the retaining cover plate is greater than the inner diameter of the circular middle cavity. There is a gap between the retaining cover plate and the lower side of the base.

8. The adjustable-size anti-deformation sandblasting protection tooling according to claim 5, characterized in that: The rotating wheel and the disc are provided with a connecting mechanism for connecting an external driving mechanism. The position of the connecting mechanism deviates from the central axis of the rotating wheel.

9. The adjustable-size anti-deformation sandblasting protection tooling according to claim 1, characterized in that: Flap pieces are respectively installed on the upper sides of the outermost ends of the first support arm, the second support arm, the third support arm and the fourth support arm by screws, and one end of each flap piece extends outwards beyond the outermost end of the first support arm, the second support arm, the third support arm or the fourth support arm.

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