Prestress clamping device

Abstract

The utility model belongs to the technical field of manufacturing tools, and discloses a prestress clamping device. The prestress clamping device comprises a rack, a prestress adjusting assembly and a fixing assembly. The prestress adjusting assembly is arranged in the middle of the rack and comprises a supporting piece and an adjusting piece, the supporting piece is used for abutting against the side, close to the rack, of the workpiece, the adjusting piece is arranged between the rack and the supporting piece, and the adjusting piece can adjust prestress applied to the workpiece by the supporting piece. Fixing assemblies are arranged at the two ends of the rack and used for fixing the two ends, in the length direction, of the workpiece. The prestress clamping device disclosed by the utility model can simply and efficiently apply different prestressing forces to a workpiece without preparing various different prestress clamping devices according to different prestressing forces, so that the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing tooling, in particular to a prestressed clamping device. Background Art

[0002] Shot peening technology is a special processing method that uses high-speed spherical projectiles to spray the surface layer of the workpiece to cause it to produce plastic deformation. This technology is mainly used for the forming of large integral wall panels. Its application in the field of aerospace flight technology can effectively improve the performance of aircraft, making the aircraft have outstanding advantages such as high structural efficiency, aerodynamic shape and good air tightness. It is an important way to achieve weight reduction and overall performance improvement of aircraft structure. In shot peening forming technology, prestressed shot peening forming is a special method. It first elastically pre-bends the plate on the prestressed fixture, and then shot peens the tensile surface of the plate. This method helps to extend the sprayed material, while deepening the depth of the compressive stress layer and increasing the average value of the residual compressive stress in the compressive stress layer, thereby ensuring that the plate can be formed in the required direction.

[0003] In the prior art, less consideration is given to applying prestress to the workpiece during shot peening. Even if prestress is applied, different prestress clamping devices are required to provide different prestresses to the workpiece. This makes the prestress clamping device in the prior art complex in structure and requires a large number of prestress clamping devices, thereby increasing the manufacturing cost. Utility Model Content

[0004] The utility model aims to provide a prestressed clamping device, so as to simply and efficiently apply prestresses of different sizes to a workpiece.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A prestressed clamping device, comprising:

[0007] frame;

[0008] A prestress adjustment component is arranged in the middle of the frame, the prestress adjustment component comprises a support member and an adjustment member, one side of the support member can abut against a side of the workpiece close to the frame, the adjustment member is arranged between the frame and the support member, and the adjustment member can adjust the prestress applied by the support member to the workpiece;

[0009] A fixing assembly is provided at both ends of the frame, and is used to clamp and fix the two ends of the workpiece along the length direction.

[0010] Preferably, the adjusting member comprises an adjusting pad, and the prestress applied by the supporting member to the workpiece is adjusted by changing the thickness of the adjusting pad between the supporting member and the frame.

[0011] Preferably, the support member is a support rod, the support rod extends along the width direction of the workpiece, and a peripheral wall of the support rod abuts against the workpiece.

[0012] Preferably, the prestressed pressure adjustment assembly further comprises a connecting component, both ends of the support rod are connected to the frame via the connecting component, and the height of the support rod on the connecting component is adjustable.

[0013] Preferably, the connecting component comprises a first threaded rod and a nut, both ends of the support rod are provided with connecting holes, the first threaded rod is fixed to the frame after passing through the connecting holes, and the height of the support rod on the first threaded rod is adjustable;

[0014] A side of the support rod close to the frame is set as an abutment plane, the adjustment pad is arranged between the frame and the abutment plane, the end surface of the connecting hole at one end away from the frame is set as a locking plane, the nut is screwed to the end of the first threaded rod away from the frame, and the nut abuts against the locking plane to lock the support rod to the frame.

[0015] Preferably, the fixing assembly includes a fixing seat and a fixing part, wherein one end of the fixing seat away from the prestressed pressure adjusting assembly is connected to the frame, and the fixing part is movably provided on one end of the fixing seat close to the prestressed pressure adjusting assembly, and moving the fixing part can make the fixing part abut against the workpiece to be fixed or disengaged from the abutment to release the fixation.

[0016] Preferably, a fixing plate is provided at one end of the fixing seat close to the prestressed adjustment component, a moving space is reserved between the fixing plate and the frame, the fixing part is movably provided on the fixing plate, the fixing part extends into the moving space and moves in a direction close to the workpiece so as to abut and fix with the workpiece, and the fixing part moves in a direction away from the workpiece so as to disengage from the abutment and release the fixation.

[0017] Preferably, the fixing member includes a second threaded rod and a clamping portion, a first threaded hole is provided on the fixing plate, the second threaded rod is threadedly engaged with the first threaded hole and extends into the movable space to be connected to the clamping portion, and the clamping portion is used to abut against the workpiece.

[0018] Preferably, the frame is provided with a positioning contour line and a limit block, the positioning contour line is used to position the outer contour of the workpiece, and the two ends of the positioning contour line along the length direction extend to the fixing assembly, for limiting the displacement of the workpiece on the frame along the length direction; the limit block is provided on one side of the positioning contour line along the width direction, for limiting the displacement of the workpiece on the frame along the width direction.

[0019] Preferably, a receiving groove is provided on the frame, the receiving groove is provided between the two fixing components, the prestressed pressure adjusting component is provided in the middle position of the receiving groove, and the depth of the receiving groove is greater than or equal to the thickness of the supporting member.

[0020] Beneficial effects:

[0021] The utility model provides a prestressed clamping device, which comprises a frame, a prestressed adjusting component and a fixing component. The prestressed adjusting component is arranged in the middle of the frame and comprises a supporting member and an adjusting member. One side of the supporting member can abut against a side of a workpiece close to the frame. The adjusting member is arranged between the frame and the supporting member and can adjust the prestressed force applied by the supporting member to the workpiece. The fixing components are arranged at both ends of the frame for fixing both ends of the workpiece. The prestressed clamping device can be used to simply and efficiently apply prestressed forces of different sizes to the workpiece without the need to prepare a variety of different prestressed clamping devices according to different sizes of prestressed forces, thereby reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the prestressed clamping device provided by the utility model;

[0023] Figure 2 It is a schematic diagram of a prestress adjustment component of the prestress clamping device provided by the utility model;

[0024] Figure 3 It is a schematic diagram of a fixing assembly of a prestressed clamping device provided by the utility model;

[0025] Figure 4 It is a schematic diagram of a frame of a prestressed clamping device provided by the utility model;

[0026] Figure 5 It is a schematic diagram of the prestressed clamping device provided by the utility model after a cover is installed.

[0027] In the figure:

[0028] 1-frame; 11-accommodating slot; 12-limiting block; 13-lifting ring; 14-cover;

[0029] 21-support rod; 22-adjusting pad; 23-first threaded rod; 24-nut; 25-locking plane;

[0030] 3-fixing assembly; 31-pressing portion; 32-second threaded rod; 33-fixing seat; 34-fixing plate. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] like Figure 1-Figure 4As shown, this embodiment provides a prestressed clamping device, which includes a frame 1, a prestressed adjustment component and a fixing component 3. The prestressed adjustment component is arranged in the middle of the frame 1, and the prestressed adjustment component includes a support member and an adjustment member, one side of the support member can abut against the side of the workpiece close to the frame 1, and the adjustment member is arranged between the frame 1 and the support member, and the adjustment member can adjust the prestress applied by the support member to the workpiece. The fixing components 3 are arranged at both ends of the frame 1, and the fixing components 3 are used to clamp and fix the two ends of the workpiece along the length direction.

[0036] Specifically, when the prestressing adjustment component needs to apply prestress to the workpiece, the side of the support member away from the frame 1 abuts against the side of the workpiece close to the frame 1, that is, the support member provides a support force to the middle of the workpiece away from the frame 1. At the same time, when the support member supports the middle of the workpiece to provide support force for it, the fixing component 3 clamps and fixes the two ends of the workpiece along the length direction, which causes the workpiece, which is originally a planar structure, to deform, and the workpiece is deformed into an arc surface with two ends close to the frame 1 and the middle away from the frame 1. When the adjustment member is used to adjust the prestress applied to the workpiece, the distance between the side of the support member away from the frame 1 and the frame 1 will be changed. When the distance between the side of the support member away from the frame 1 and the frame 1 is farther, the prestress applied to the workpiece by the prestressing clamping device is greater, and the deformation of the workpiece is greater; when the distance between the side of the support member away from the frame 1 and the frame 1 is closer, the prestress applied to the workpiece by the prestressing clamping device is smaller, and the deformation of the workpiece is smaller. Exemplarily, the workpiece is a shot peening test piece, which can be used to measure and evaluate the effect of shot peening.

[0037] like Figure 2As shown, in this embodiment, the adjusting member includes an adjusting pad 22, and the prestress applied by the supporting member to the workpiece is adjusted by changing the thickness of the adjusting pad 22 between the supporting member and the frame 1. Specifically, the thickness of the adjusting pad 22 between the supporting member and the frame 1 can be changed by replacing the adjusting pad 22 with different thicknesses; or by changing the number of adjusting pads 22 stacked between the supporting member and the frame 1; or by changing the number of adjusting pads 22 stacked between the supporting member and the frame 1 while replacing the adjusting pads 22 with different thicknesses. Further, the adjusting pad 22 is made of a rigid material, and only one adjusting pad 22 is arranged between the supporting member and the frame 1, and one side surface of the adjusting pad 22 abuts against the frame 1, and the other side surface abuts against the supporting member. The thickness of the adjusting pad 22 between the supporting member and the frame 1 is changed by replacing a single adjusting pad 22 with different thicknesses. The side of the support member close to the frame 1 is set as an abutment plane, and the adjustment pad 22 is set between the frame 1 and the abutment plane. The abutment plane is in contact with the upper surface of the adjustment pad 22, and the lower surface of the adjustment pad 22 is in contact with the surface of the frame 1, so that the support member can provide uniform support force for the workpiece along the width direction. The upper surface of the adjustment pad 22 is in contact with the abutment plane, and the lower surface of the adjustment pad 22 is in contact with the surface of the frame 1, so that the adjustment pad 22 is stably set between the support member and the frame 1, and the reaction force generated when the support member applies prestress to the workpiece is prevented from causing the adjustment pad 22 to fall out and affect the effect of prestress application. That is, the adjustment pad 22 provides a supporting force for the support member away from the frame 1, and when the support member applies prestress to the workpiece, it is prevented from displacing the support member in the direction close to the frame 1, thereby causing the prestress applied to the workpiece to change. In some other embodiments, the adjustment member can be a micro-electric lifting platform or a nut screw lifting device arranged between the support member and the frame 1.

[0038] Specifically, in order to apply different prestresses to the workpiece, it is necessary to change the thickness of the adjustment pad 22. The symbol g represents the thickness of the adjustment pad 22. The thickness g of the adjustment pad is calculated as follows: first, find out the elastic modulus E and yield strength σS of the raw material according to the material manual. The different prestress strengths σ actually applied can be set as percentage values ​​of the yield strength σS. Specifically, the prestress strength is less than or equal to the yield strength. Then determine the bending span b and the material thickness t, and finally use the formula Calculate the arc height value h corresponding to each different parameter. Assuming that the groove depth of the receiving groove 11 is c and the height of the support rod 21 is d, the arc height value h=g+dc, and the thickness of the adjustment pad g=h+cd. Furthermore, when formulating the shot peening test piece plan, the material thickness t of the test piece is usually determined according to the thickness of the part to be manufactured, and the thickness g of the adjustment pad 22 is calculated according to the different applied prestress strengths σ. When the shot peening distance, flow rate, and angle are determined, the reasonable shot peening pressure and machine tool speed are determined according to the coverage rate through the test piece test spraying method, so as to formulate a shot peening matrix plan. After the test piece is shot peened, the arc height of the measuring point on the test piece is measured by measuring tools such as an arc height meter, so as to create a test piece shot peening database.

[0039] Specifically, in the present embodiment, the support member is a support rod 21, and the support rod 21 extends along the width direction of the workpiece, and the peripheral wall of the support rod 21 abuts against the workpiece. Specifically, the length of the support rod 21 is greater than the width of the workpiece and both ends of the support rod 21 do not contact the workpiece, so that when the workpiece contacts the support rod 21, the workpiece is uniformly stressed along the width direction. Furthermore, the surface of the support rod 21 close to the workpiece is an arc-shaped surface. When the support rod applies prestress to the workpiece, the workpiece deforms and fits the support rod. At this time, the contact surface between the support rod 21 and the workpiece is an arc-shaped surface, which increases the force area between the support rod 21 and the workpiece, makes the surface of the workpiece uniformly stressed, and prevents the support rod 21 from having edges and corners that damage the workpiece. In some other embodiments, the support member can be a plurality of support balls arranged in parallel.

[0040] The prestress adjustment assembly in this embodiment also includes a connecting component, and both ends of the support rod 21 are connected to the frame 1 through the connecting component, and the height of the support rod 21 on the connecting component is adjustable. Specifically, the support rod 21 changes the distance between the support rod 21 and the frame 1 by adjusting the height on the connecting component, and the higher the height of the support rod 21 on the connecting component, the farther the support rod 21 is from the frame 1, and replacing the adjustment pad that matches the distance between the support rod 21 and the frame 1 can make the prestress applied by the support rod 21 to the workpiece greater; the lower the height of the support rod 21 on the connecting component, the closer the distance between the support rod 21 and the frame 1 is, and replacing the adjustment pad that matches the distance between the support rod 21 and the frame 1 can make the prestress applied by the support rod to the workpiece smaller.

[0041] The connection component in this embodiment includes a first threaded rod 23 and a nut 24. Both ends of the support rod 21 are provided with connection holes. The first threaded rod 23 is fixed to the frame 1 after passing through the connection holes. The height of the support rod 21 on the first threaded rod 23 is adjustable. The end surface of the connection hole away from the frame 1 is provided as a locking plane 25. The nut 24 is screwed to the end of the first threaded rod 23 away from the frame 1. The nut 24 abuts against the locking plane 25 to lock the support rod 21 to the frame 1. Specifically, when using the prestressing adjustment force assembly to apply different prestresses to the workpiece, first move the support rod 21 along the height direction of the first threaded rod 23 and away from the frame 1; then place the adjustment pad 22 of the corresponding thickness between the support rod 21 and the frame 1; then move the support rod 21 along the height direction of the first threaded rod 23 and close to the frame 1 until it abuts against the adjustment pad 22; after the support rod 21 abuts against the adjustment pad 22, tighten the nut 24 so that the nut 24 abuts against the locking plane 25, and lock the support rod 21 on the frame 1; finally, place the workpiece on the prestressing clamping device so that the prestressing adjustment assembly provides prestress for the workpiece. Furthermore, the end of the first threaded rod 23 close to the frame 1 is also provided with a thread, the frame 1 is provided with a corresponding threaded hole, and the first threaded rod 23 is screwed and fixed on the frame 1. In some other embodiments, the first threaded rod 23 can also be welded and fixed on the frame 1.

[0042] like Figure 3 As shown, in this embodiment, the fixing assembly 3 includes a fixing seat 33 and a fixing member, and one end of the fixing seat 33 away from the prestressing adjustment assembly is connected to the frame 1, and one end of the fixing seat 33 close to the prestressing adjustment assembly is movably provided with a fixing member, and the moving fixing member can make the fixing member abut against the workpiece to be fixed or disengaged from the abutment to release the fixation. Specifically, after the workpiece is placed on the prestressing clamping device, the two ends of the workpiece along the length direction are located on the movement path when the fixing member moves toward the frame 1, and the moving fixing member moves toward the frame 1 so that the fixing member abuts against the two ends of the workpiece along the length direction. When the prestressing clamping device is required to provide prestress to the workpiece, the support rod 21 lifts the workpiece, and after the fixing member abuts against the two ends of the workpiece along the length direction, the fixing member is further moved to deform the workpiece, and then the two ends of the workpiece along the length direction are pressed tightly against the surface of the frame 1 by the fixing member, that is, the fixing member and the surface of the frame 1 clamp the workpiece together.

[0043] Specifically, in the present embodiment, a fixing plate 34 is provided at one end of the fixing seat 33 close to the prestressed adjusting assembly, and a moving space is reserved between the fixing plate 34 and the frame 1. The fixing part is movably provided on the fixing plate 34. The fixing part extends into the moving space and moves in a direction close to the workpiece so as to abut and fix with the workpiece. The fixing part moves in a direction away from the workpiece so as to disengage from the abutment and release the fixation. Specifically, when it is necessary to apply prestress to the workpiece, the workpiece is first placed on the support rod 21 with the height adjusted. At this time, the workpiece is lifted by the support rod 21 and will not contact the frame 1 as a whole. The end of the workpiece along the length direction will be at a distance from the frame 1. Therefore, the fixing parts at both ends need to leave a clearance space between the upper surface of the frame 1 to avoid the end of the workpiece and facilitate the placement of the end of the workpiece. At the same time, there is a moving space between the fixing plate 34 and the frame 1 to facilitate the fixing parts to move in the moving space and away from the frame 1 when the workpiece is not installed, so as to form a clearance space between the fixing parts and the frame 1 for the placement of the workpiece; when the workpiece is placed on the support rod 21, the fixing parts move in the moving space in the direction close to the workpiece to abut and fix the workpiece and press the workpiece tightly against the frame 1. Further, when the workpiece is a shot peening test piece and the shot peening is completed, the fixing parts move in the direction away from the workpiece and separate from the shot peening test piece to facilitate the removal of the shot peening test piece.

[0044] Specifically, in this embodiment, the fixing member includes a second threaded rod 32 and a clamping portion 31, and a first threaded hole is provided on the fixing plate 34. After the second threaded rod 32 is threadedly matched with the first threaded hole, it extends into the moving space and is connected to the clamping portion 31, and the clamping portion 31 is used to abut against the workpiece. Specifically, by rotating the second threaded rod 32, the second threaded rod 32 is close to the frame 1 or away from the frame 1, so as to achieve the technical effect of clamping the fixed workpiece or releasing the clamping of the fixed workpiece. Further, a mounting hole is provided at one end of the fixing seat 33 away from the prestressed pressure adjustment component, and a corresponding fixing hole is provided at a corresponding position of the frame 1. The fixing seat 33 is screwed with the frame 1 after passing the screw through the mounting hole and the fixing seat 33 is fixed on the frame 1. Furthermore, a plurality of fixing components 3 are provided at each end of the prestressed pressure clamping device to control the workpiece together, and the plurality of fixing components 3 simultaneously control the workpiece along the width direction of the workpiece, thereby improving the degree of fixation of the workpiece. Specifically, three fixing components 3 are provided at both ends of the frame to control the workpiece.

[0045] like Figure 4As shown, in this embodiment, the frame 1 is provided with a positioning contour line and a limit block 12. The positioning contour line is used to locate the outer contour of the workpiece. The two ends of the positioning contour line along the length direction extend to the fixed assembly 3, which is used to limit the displacement of the workpiece on the frame 1 along the length direction; the limit block 12 is provided on one side of the positioning contour line along the width direction, which is used to limit the displacement of the workpiece on the frame 1 along the width direction. Specifically, when placing the workpiece, it is placed along the positioning contour line and one side of the workpiece along the width direction is abutted against the limit block 12. At the same time, since the two ends of the positioning contour line along the length direction are respectively abutted against the two fixed seats 33, the two ends of the workpiece along the length direction will not exceed the positioning contour line due to the limiting effect of the fixed seat 33. Furthermore, the limit blocks 12 are provided on both sides of the prestressed pressure adjustment assembly, so that when the workpiece abuts against the limit blocks 12, it will not deflect due to the torque generated.

[0046] Specifically, in this embodiment, a receiving groove 11 is provided on the frame 1, and the receiving groove 11 is provided between the two fixing components 3, and the prestressing adjustment component is provided in the middle position of the receiving groove 11, and the depth of the receiving groove 11 is greater than or equal to the thickness of the support member. Specifically, when the adjustment pad 22 is not provided between the support rod 21 and the frame 1, the support rod 21 is located in the receiving groove 11 as a whole, and when the workpiece is provided in the prestressing clamping device, the workpiece contacts the end face of the receiving groove 11, that is, directly contacts the frame 1, and at this time, the support rod 21 is still located in the receiving groove 11 and will not contact the frame 1 and will not apply prestress to the workpiece. Therefore, the prestressing clamping device in this embodiment can also perform shot peening on the shot peening test piece without applying prestress, which expands the use range of the shot peening test piece, can obtain more complete shot peening process information, and is conducive to improving the quality control effect of the shot peening process. Furthermore, the four corners of the frame 1 are provided with lifting rings 13, which are screwed and fixed to the frame 1, so that the prestressed clamping device can be conveniently lifted and transported through the lifting rings 13 when being moved.

[0047] like Figure 5 As shown, the prestressed clamping device in this embodiment is also provided with a detachable cover 14. When the prestressed clamping device is not in use, the cover 14 is covered on the receiving groove 11 to prevent the external environment such as dust from affecting the prestressed adjustment component; when the prestressed clamping device is ready to be used, the cover 14 is removed to expose the prestressed adjustment component to the outside world.

[0048] Specifically, the steps of shot peening the non-prestressed test piece by the prestressed clamping device are as follows:

[0049] (1) Place the entire prestressed clamping device on a specific device through the lifting ring 13 and fix it.

[0050] (2) When no prestress is required, the adjustment pad 22 is removed, the support rod 21 is completely located in the receiving groove 11, and the test piece to be shot peened is directly placed above the prestress adjustment component and below the fixed component 3, and when placed, one side of the shot peening test piece is in contact with the limit block 12, and the other sides coincide with the positioning contour line.

[0051] (3) The six second threaded rods 32 are rotated uniformly by a tool so that the pressing portion 31 presses the shot peening test piece and clamps and fixes the shot peening test piece.

[0052] (4) Use tape to protect areas that do not require shot blasting.

[0053] (5) Start the equipment for shot peening.

[0054] (6) After shot peening, take out the shot peening test piece, measure the arc height at the measuring point and record the measured value.

[0055] (7) Repeat steps (2) to (6) until all the non-prestressed shot peening test pieces have been shot peened.

[0056] Furthermore, the steps of shot peening the prestressed test piece using the prestressed clamping device are as follows:

[0057] (1) Place the entire prestressed clamping tool on a specific device through the lifting ring 13 and fix it;

[0058] (2) When prestress is required, first place an adjustment pad 22 of corresponding height at the bottom of the support rod 21 according to the calculated lifting height, and place the shot peening test piece above the prestress adjustment component and below the fixed component 3. When placing the shot peening test piece, one side of the shot peening test piece is in contact with the limit block 12, and the orthographic projection of the other side on the frame 1 coincides with the positioning contour line.

[0059] (3) The six second threaded rods 32 are rotated uniformly by a tool, so that the clamping portion 31 abuts against the shot peening test piece and deforms both ends thereof until both ends of the shot peening test piece contact the upper surface of the frame 1, thereby clamping and fixing the shot peening test piece.

[0060] (4) Use tape to protect areas that do not require shot blasting.

[0061] (5) Start the equipment for shot peening.

[0062] (6) After shot peening, take out the shot peening test piece, measure the arc height at the measuring point and record the measured value.

[0063] (7) Repeat steps (2) to (6) until all the prestressed shot peening test pieces have been shot peened.

[0064] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A prestressed clamping device, characterized in that: include: Rack (1); A prestress adjustment component is arranged in the middle of the frame (1), the prestress adjustment component comprises a support member and an adjustment member, one side of the support member can abut against a side of the workpiece close to the frame (1), the adjustment member is arranged between the frame (1) and the support member, and the adjustment member can adjust the prestress applied by the support member to the workpiece; A fixing assembly (3), wherein both ends of the frame (1) are provided with the fixing assembly (3), and the fixing assembly (3) is used to clamp and fix the two ends of the workpiece along the length direction.

2. The prestressed clamping device according to claim 1, characterized in that: The adjusting member comprises an adjusting pad (22), and the prestress applied by the supporting member to the workpiece is adjusted by changing the thickness of the adjusting pad (22) between the supporting member and the frame (1).

3. The prestressed clamping device according to claim 2, characterized in that: The support member is a support rod (21), the support rod (21) extends along the width direction of the workpiece, and the peripheral wall of the support rod (21) abuts against the workpiece.

4. The prestressed clamping device according to claim 3, characterized in that: The prestressed force adjustment assembly further comprises a connecting component, both ends of the support rod (21) are connected to the frame (1) via the connecting component, and the height of the support rod (21) on the connecting component is adjustable.

5. The prestressed clamping device according to claim 4, characterized in that: The connecting component comprises a first threaded rod (23) and a nut (24); both ends of the support rod (21) are provided with connecting holes; the first threaded rod (23) is fixed to the frame after passing through the connecting holes; and the height of the support rod (21) on the first threaded rod (23) is adjustable; A side of the support rod (21) close to the frame is arranged as an abutment plane, the adjustment pad (22) is arranged between the frame (1) and the abutment plane, an end surface of the connection hole at one end away from the frame (1) is arranged as a locking plane (25), the nut (24) is screwed to an end of the first threaded rod (23) away from the frame (1), and the nut (24) abuts against the locking plane (25) to lock the support rod (21) to the frame.

6. The prestressed clamping device according to claim 1, characterized in that: The fixing assembly comprises a fixing seat (33) and a fixing piece. The fixing seat (33) is connected to the frame at one end away from the prestressing force adjusting assembly. The fixing piece is movably provided at one end of the fixing seat (33) close to the prestressing force adjusting assembly. Moving the fixing piece can cause the fixing piece to abut against the workpiece to be fixed or to be disengaged from the abutment to be released.

7. The prestressed clamping device according to claim 6, characterized in that: A fixing plate (34) is provided at one end of the fixing seat (33) close to the prestressing force adjusting assembly, a moving space is reserved between the fixing plate (34) and the frame, the fixing member is movably arranged on the fixing plate (34), the fixing member extends into the moving space and moves in a direction close to the workpiece so as to abut and fix with the workpiece, and the fixing member moves in a direction away from the workpiece so as to be disengaged from the abutment and release the fixation of the workpiece.

8. The prestressed clamping device according to claim 7, characterized in that: The fixing member comprises a second threaded rod (32) and a clamping portion (31); a first threaded hole is provided on the fixing plate (34); the second threaded rod (32) is threadedly matched with the first threaded hole and extends into the moving space to be connected with the clamping portion (31); the clamping portion (31) is used to abut against the workpiece.

9. The prestressed clamping device according to any one of claims 1 to 8, characterized in that: The frame (1) is provided with a positioning contour line and a limit block (12); the positioning contour line is used to position the outer contour of the workpiece; both ends of the positioning contour line along the length direction extend to the fixing assembly (3) and are used to limit the displacement of the workpiece on the frame (1) along the length direction; the limit block (12) is provided on one side of the positioning contour line along the width direction and is used to limit the displacement of the workpiece on the frame (1) along the width direction.

10. The prestressed clamping device according to any one of claims 1 to 8, characterized in that: The frame (1) is provided with a receiving groove (11), the receiving groove (11) is provided between the two fixing components (3), the prestressing adjustment component is provided at a middle position of the receiving groove (11), and the depth of the receiving groove (11) is greater than or equal to the thickness of the supporting member.

Images