A method for testing the intensity of peening by opposite spraying and an opposite spraying fixture

Abstract

The present invention discloses a method for testing the intensity of opposite spraying shot peening and an opposite spraying fixture. The testing method is to adjust two shot peening test pieces mounted on the opposite spraying fixture in a plane and ensure that the spraying distances of the two shot peening test pieces to the opposite spraying nozzles are the same as those in actual opposite spraying. Then, the opposite spraying shot peening equipment is moved along a straight path parallel to this plane to complete the intensity test of the two shot peening test pieces in one shot peening program. The opposite spraying fixture includes a base, a support frame, and a base. A rotating shaft is provided on the base, and the support frame is rotatably connected to the rotating shaft. The base includes a first base and a second base. The first base is rotatably connected to the first end of the support frame, and the second base is rotatably connected to the second end of the support frame. One shot peening test piece is respectively mounted on the first base and the second base. The present invention can complete the symmetrical shot peening intensity test of two shot peening test pieces by executing one opposite spraying program, and solves the problem of cumbersome operation existing in the existing testing method.

Description

Technical Field

[0001] The present invention belongs to the technical field of surface treatment, and particularly relates to a method for testing the intensity of opposite spraying shot peening and a fixture for opposite spraying. Background Art

[0002] The current opposite spraying shot peening equipment adopts a single robot to control a double-nozzle structure, and the two nozzles are fixed by a bracket, as Figure 1 shown. Since the relative positions and angles of the two nozzles cannot be changed, in order to ensure the symmetry of shot peening on the front and back of the blade, the blade needs to be placed at the symmetric center of the two nozzles for shot peening, that is, Figure 1 the spraying distance dimensions L1 = L2 in the left figure of

[0003] Before formally performing opposite spraying shot peening on the blade, it is necessary to test the shot peening intensity to ensure that the effect of opposite spraying meets the expectations. Currently, generally, shot peening specimens are used for testing, that is, the nozzle is used to perform shot peening on the single-sided surface of the shot peening specimen. Since the shot peening specimen after being shot will undergo one-way bending, the bending deformation degree of the shot peening specimen can be measured to judge whether the shot peening intensities of the two nozzles during opposite spraying shot peening are the same, that is, two shot peening specimens respectively reflect the shot peening intensities of the two opposite spraying nozzles.

[0004] Since what needs to be observed is the one-sided bending deformation degree of the shot peening specimen, the shot peening specimen is installed on the specimen fixture during the shot peening intensity test, with one surface receiving shot peening and the other surface being blocked. At this time, in order to ensure that the shot peening specimen can simulate the actual opposite spraying effect, the distance from the shot peened surface of the shot peening specimen to the nozzle must be the same as the distance from the blade surface to the nozzle during actual opposite spraying, which leads to the thickness of the specimen fixture for clamping the shot peening specimen having to be considered. As Figure 2 and Figure 3 show, the thickness of the specimen fixture is significantly greater than that of the shot peening specimen, so shot peening specimens cannot be installed on both sides of the specimen fixture at the same time. As Figure 1 shown in the right figure of

[0005] (1) Two shot peening specimens need to be installed on two specimen fixtures respectively and then tested twice. The two tests mean that the opposite spraying shot peening equipment needs to move twice (i.e., call the shot peening program twice), and the shot peening intensity test can only be completed in two times. Only one shot peening specimen can be tested on each moving path;

[0006] (2)When switching the fixtures for two test pieces, in order to ensure that the spraying distance from the shot peening test piece to the nozzle is the same as that in the actual opposed spraying, it needs to be adjusted twice. That is, adjust the spraying distance once during the first test and adjust the spraying distance again during the second test. The operation is very cumbersome. When there are many blade specifications, the workload is very large. Summary of the Invention

[0007] The present invention aims to provide an opposed spraying shot peening strength test method and an opposed spraying fixture, which solve the problem of cumbersome operation caused by the need to strike the test pieces of the opposed spraying fixture twice by the opposed spraying shot peening equipment when testing the shot peening strength, and can realize the symmetric shot peening strength test of two shot peening test pieces by executing one opposed spraying program.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] An opposed spraying shot peening strength test method includes a first nozzle and a second nozzle symmetrically arranged in a first plane for opposed spraying, and the first nozzle and the second nozzle move simultaneously along a first straight path, and the first straight path is perpendicular to the first plane.

[0010] Step 1: Symmetrically arrange the shot-peened surfaces of the first shot peening test piece and the second shot peening test piece in a second plane, and the second plane is perpendicular to the first plane. The non-shot-peened surfaces of the first shot peening test piece and the second shot peening test piece are shielded by a fixture.

[0011] Step 2: Adjust the position of the second plane so that the spraying distance from the shot-peened surface of the first shot peening test piece in the second plane to the first nozzle is equal to the spraying distance from the shot-peened surface of the second shot peening test piece to the second nozzle, and keep the positions of the first shot peening test piece and the second shot peening test piece unchanged.

[0012] Step 3: Simultaneously start the first nozzle and the second nozzle and move along the first straight path. During the movement, when the shot-peened surface of the first shot peening test piece receives shot peening treatment by the first nozzle, the second nozzle performs shot peening on the fixture of the first shot peening test piece. When the shot-peened surface of the second shot peening test piece receives shot peening treatment by the second nozzle, the first nozzle performs shot peening on the fixture of the second shot peening test piece.

[0013] As an option, in the above Step 2, the method for adjusting the position of the second plane includes rotation, translation, or a combination of rotation and translation.

[0014] A shot peening opposed spraying fixture for the opposed spraying of two shot peening test pieces includes:

[0015] A base, on which a rotating shaft is provided;

[0016] A support frame, which is rotatably connected to the rotating shaft;

[0017] Base, the base includes a first base and a second base. The first base is rotatably connected to the first end of the support frame, and the second base is rotatably connected to the second end of the support frame. The surface of the first base is provided with a first shot peening coupon clamping surface, and the surface of the second base is provided with a second shot peening coupon clamping surface. The first end and the second end of the support frame are respectively located on both sides of the plane where the rotating shaft is located.

[0018] As an option,

[0019] The rotating shaft is a screw rod, and one end of the screw rod is connected to the base;

[0020] A threaded hole is formed in the support frame, and the support frame is sleeved on the screw rod through the threaded hole.

[0021] As an option, the shot peening opposed spraying fixture further includes a locking structure. The locking structure includes a notch, a locking lug and a locking screw. Among them,

[0022] The notch is formed in the support frame, and the notch extends along the axis direction of the threaded hole and intersects with the threaded hole;

[0023] There are two locking lugs. One end of the two locking lugs is connected to the surface of the support frame, and the two locking lugs are respectively located on both sides of the plane where the notch is located. A first threaded hole is formed in the locking lug, and the axis of the first threaded hole is perpendicular to the notch;

[0024] The locking screw is simultaneously connected to the first threaded holes of the two locking lugs.

[0025] As an option, the shot peening opposed spraying fixture further includes a positioning nut. The positioning nut is sleeved on the screw rod and is located between the support frame and the base.

[0026] As an option, through holes penetrating the base are formed in the base;

[0027] A second threaded hole is formed at each of the first end and the second end of the support frame;

[0028] The base is connected to the support frame through fixing screws inserted into its own through holes.

[0029] As an option, compression screws are arranged on both the first shot peening coupon clamping surface and the second shot peening coupon clamping surface.

[0030] Compared with the prior art, when the shot peening equipment is a double-nozzle opposed spraying structure symmetrically arranged in the same plane, the shot peening opposed spraying fixture and the opposed spraying shot peening intensity testing method of the present invention can ensure that the shot-peened surfaces of the two shot peening coupons are in the same plane, and realize shot peening of two shot peening coupons at one time. At the same time, the shot peening opposed spraying fixture of the present invention can be adjusted in 3 different directions, making it suitable for shot peening of test pieces of more complex structure parts. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the structure of the opposed-jet nozzle and the existing shot peening intensity test method;

[0032] Figure 2 and Figure 3 is a schematic diagram of the base of the standard specimen fixture;

[0033] Figure 4 is a schematic diagram of the degree-of-freedom state of the shot peening opposed-jet fixture in the present invention;

[0034] Figure 5 is a schematic diagram of the base and screw of the shot peening opposed-jet fixture in the present invention;

[0035] Figure 6 is a schematic diagram of the support frame of the shot peening opposed-jet fixture in the present invention;

[0036] Figure 7 is a schematic diagram of the base of the shot peening opposed-jet fixture in the present invention;

[0037] Figure 8 is a schematic diagram of the process of the shot peening opposed-jet intensity test method in the present invention;

[0038] In the figure, 1 - base; 2 - support frame; 3 - base; 4 - screw; 5 - positioning nut; 6 - locking screw; 7 - fixing screw; 8 - pressing screw; 9 - shot peening specimen; 10 - first nozzle; 11 - second nozzle; 12 - nozzle moving direction; 13 - spraying distance; 14 - surface being peened. Specific Embodiment

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above technical idea of the present invention, all modifications, substitutions, and changes made according to ordinary technical knowledge and conventional means in the art are included in the scope of the present invention.

[0040] As Figure 8 shown, it is the shot peening opposed-jet intensity test method of the present invention. The shot peening opposed-jet device includes a first nozzle 10 and a second nozzle 11 symmetrically arranged in a first plane for opposed-jet, and the first nozzle 10 and the second nozzle 11 move simultaneously along a first straight path, and the first straight path is perpendicular to the first plane. Specifically, the shot peening opposed-jet intensity test method includes the following steps.

[0041] Step 1, arrange the surface being peened 14 of the first shot peening specimen and the surface being peened 14 of the second shot peening specimen symmetrically in a second plane ( Figure 8The planes drawn with dashed lines), and the second plane is perpendicular to the first plane. The non-blasted surfaces of the first shot peening specimen and the second shot peening specimen are shielded by fixtures;

[0042] Step 2: Adjust the position of the second plane so that the spraying distance 13 from the blasted surface 14 of the first shot peening specimen in the second plane to the first nozzle 10 ( Figure 8 as shown by the double-headed arrow in the figure) is equal to the spraying distance 13 from the blasted surface 14 of the second shot peening specimen to the second nozzle 11 ( Figure 8 as shown by the double-headed arrow in the figure), and keep the positions of the first shot peening specimen and the second shot peening specimen unchanged;

[0043] Step 3: Start the first nozzle 10 and the second nozzle 11 simultaneously and move along the first straight path ( Figure 8 the nozzle moving direction 12 in the figure, single-headed arrow). During the movement, when the blasted surface 14 of the first shot peening specimen receives shot peening treatment from the first nozzle 10, the second nozzle 11 performs shot peening on the fixture of the first shot peening specimen. When the blasted surface 14 of the second shot peening specimen receives shot peening treatment from the second nozzle 11, the first nozzle 10 performs shot peening on the fixture of the second shot peening specimen.

[0044] As Figures 4 to 7 shown, the base 3 part of the shot peening opposed fixture is still designed according to the requirements of the navigation mark, but the two bases 3 are arranged in a reverse offset manner, as Figure 4 and Figure 7 shown, ensuring that the blasted surfaces 14 of the two shot peening specimens 9 are in the same plane after clamping ( Figure 8 the plane drawn with the center line in the figure). When the opposed nozzles for shot peening ( Figure 8 the first nozzle 10 and the second nozzle 11 in the figure) perform shot peening, a single path (along Figure 8 the nozzle moving direction 12 in the figure) can complete the shot peening of the two shot peening specimens 9, thus ensuring that the spraying distances and spraying angles on both sides are the same.

[0045] The shot peening opposed fixture mainly consists of a base 1 with a screw 4, a support frame 2, and a base 3, as Figure 4As shown in the figure. The fixture is connected to the planetary turntable of the opposed shot peening equipment through two stepped holes on the base 1. The support frame 2 passes through the screw 4 and can rotate around the screw 4 to adjust the angle in the C-axis direction. At the same time, the Z-axis position is adjusted by rotating the positioning nut 5. After the position is adjusted, it is fixed by the locking screw 6. There are two bases 3 in total. The first base 3 is rotatably connected to the first end of the support frame 2, and the second base 3 is rotatably connected to the second end of the support frame 2. The first base 3 is provided with a first shot peening coupon clamping surface on its surface, and the second base 3 is provided with a second shot peening coupon clamping surface on its surface. The first end and the second end of the support frame 2 are respectively located on both sides of the plane where the screw 4 is located. The base 3 is connected to the support frame by a fixing screw 7 and can rotate around the fixing screw 7 to adjust the position in the A-axis direction. The shot peening coupon 9 is fixed on the surface of the base 3 by 4 round head pressing screws 8. The positioning nut 5 is installed on the screw 4 and is located at the lower end of the support frame 2, so as to adjust the position in the Z-axis direction. The two bases 3 in the shot peening opposed fixture enable the two shot peening coupons 9 to be located on the same plane of the fixture, and the spraying distances 13 from the two shot peening coupons 9 to the first nozzle 10 and the second nozzle 11 are the same through the adjustment in the A-axis, C-axis, and Z-axis directions. When the two opposed nozzles move along this plane, the two shot peening coupons 9 can be shot peened successively at one time.

[0046] When the shot peening equipment uses two nozzles in the same plane as the opposed spraying structure, the shot peening opposed fixture of the present invention can ensure that the shot-peened surfaces 14 of the two shot peening coupons 9 are in the same plane ( Figure 8 the dotted plane in the figure), as shown in Figure 8 the figure. When the symmetrically distributed first nozzle 10 and second nozzle 11 move along the Y direction (the nozzle moving direction 12), the spraying distances 13 sprayed on the two shot peening coupons 9 are the same, and the two shot peening coupons 9 on both sides of the opposed fixture can be shot peened by one shot peening strike. Further, as shown in Figure 4 the figure, since the shot peening opposed fixture can adjust in the A-axis, C-axis, and Z-axis directions at the same time, it can be applied to the shot peening of coupons of more complex structural parts.

Claims

1. A method for testing the intensity of impact peening by opposed spraying, comprising a first nozzle (10) and a second nozzle (11) symmetrically arranged in a first plane for opposed spraying, the first nozzle (10) and the second nozzle (11) moving simultaneously along a first straight path, the first straight path being perpendicular to the first plane, characterized in that: Step 1: The sprayed surfaces (14) of the first impact peening specimen and the second impact peening specimen are symmetrically arranged in a second plane, and the second plane is perpendicular to the first plane. The non-sprayed surfaces of the first impact peening specimen and the second impact peening specimen are shielded by jigs. Step 2: Adjust the position of the second plane so that the spraying distance (13) from the sprayed surface (14) of the first impact peening specimen in the second plane to the first nozzle (10) is equal to the spraying distance (13) from the sprayed surface (14) of the second impact peening specimen to the second nozzle (11), and keep the positions of the first impact peening specimen and the second impact peening specimen unchanged. Step 3: Simultaneously start the first nozzle (10) and the second nozzle (11) and move along the first straight path. During the movement, when the sprayed surface (14) of the first impact peening specimen receives impact peening treatment from the first nozzle (10), the second nozzle (11) performs impact peening on the jig of the first impact peening specimen; when the sprayed surface (14) of the second impact peening specimen receives impact peening treatment from the second nozzle (11), the first nozzle (10) performs impact peening on the jig of the second impact peening specimen.

2. The method for testing the intensity of impact peening according to claim 1, wherein: In the said Step 2, the method for adjusting the position of the second plane includes rotation, translation, or a combination of rotation and translation.

3. A counter-jet fixture, characterized in that: For the opposed spraying of two impact peening specimens (9), it includes a base (1), on which a rotating shaft is provided; a support frame (2), rotatably connected to the rotating shaft; a base (3), the base (3) includes a first base and a second base. The first base is rotatably connected to the first end of the support frame (2), and the second base is rotatably connected to the second end of the support frame (2). The surface of the first base is provided with a first impact peening specimen clamping surface, and the surface of the second base is provided with a second impact peening specimen clamping surface. The first end and the second end of the support frame (2) are respectively located on both sides of the plane where the rotating shaft is located.

4. The opposed spraying jig according to claim 3, characterized in that: the rotating shaft is a screw (4), and one end of the screw (4) is connected to the base (1); a threaded hole is provided on the support frame (2), and the support frame (2) is sleeved on the screw (4) through the threaded hole.

5. The opposed spraying fixture according to claim 4, characterized in that: It further includes a locking structure, the locking structure includes a notch, locking lugs, and a locking screw (6), wherein the notch is provided on the support frame (2), and the notch extends along the axis direction of the threaded hole and intersects with the threaded hole; there are two locking lugs, one end of the two locking lugs is connected to the surface of the support frame (2), and the two locking lugs are respectively located on both sides of the plane where the notch is located. A first threaded hole is provided on the locking lug, and the axis of the first threaded hole is perpendicular to the notch; the locking screw (6) is simultaneously connected to the first threaded holes of the two locking lugs.

6. The butt - spraying fixture according to claim 4, characterized in that: It further includes a positioning nut (5), and the positioning nut (5) is sleeved on the screw rod (4) and located between the support frame (2) and the base (1).

7. The opposed spraying fixture according to claim 3, wherein: a through hole penetrating the base (3) is formed in the base (3); a second threaded hole is formed at each of the first end and the second end of the support frame (2); the base (3) is connected to the support frame (2) by fixing screws (7) inserted into its own through hole; 8. The opposed spraying fixture according to claim 3, wherein: pressing screws (8) are arranged on both the first shot peening coupon clamping surface and the second shot peening coupon clamping surface.

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