Prestressed strengthening shot blasting tooling
By applying a controllable static load to the suspension springs using a prestressed shot blasting fixture, the problem of insufficient static load on the suspension springs during shot blasting is solved, resulting in a more effective distribution of residual compressive stress and improving the lifespan of the springs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG LIANMEI SPRING CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-14
AI Technical Summary
In the prior art, high-stress suspension springs fail to be effectively subjected to static loads during shot blasting, resulting in insufficient residual compressive stress in critical parts, shortened fatigue life, and increased risk of early failure.
A prestressed shot blasting fixture is designed. By connecting the upper and lower bases, the spring is clamped between the upper and lower pressure plates. A controllable static load is applied to simulate the maximum working load of the spring in actual service, forming a residual compressive stress field that is closer to the service conditions.
The fatigue life of suspension springs is improved by simulating actual working loads during shot blasting, resulting in a more effective distribution of residual compressive stress and extending the service life of the springs.
Smart Images
Figure CN224488788U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a prestressed shot blasting fixture, belonging to the field of spring processing technology. Background Technology
[0002] Suspension springs are a crucial component of automotive suspension systems, and shot blasting is necessary during manufacturing. However, for high-stress suspension springs, normal shot blasting does not apply a static load, resulting in a mismatch between the strengthening effect and the actual working stress requirements. This leads to insufficient residual compressive stress in critical areas, shortened fatigue life, and an increased risk of early failure. Utility Model Content
[0003] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a prestressed shot blasting fixture that applies a controllable and specific static load to the spring. This static load is used to simulate the maximum working load that the spring bears in actual service, so that the spring is strengthened under working stress. The resulting residual compressive stress field is closer to the ideal distribution under service conditions, which more effectively offsets the working stress and improves the life of the spring.
[0004] The prestressed shot blasting fixture of this utility model includes an upper base and a lower base. The upper base is provided with an upper pressure plate, and a connecting column is fixed in the center of the upper pressure plate. The lower base is provided with a lower pressure plate, and a connecting pipe adapted to the connecting column is provided in the center of the lower pressure plate. The upper base and the lower base are detachably connected.
[0005] The technical solution of this utility model is to provide a prestressed shot blasting fixture. When blasting a spring, the upper base and the lower base are connected, and the spring is clamped between the upper pressure plate and the lower pressure plate. A controllable and specific static load is applied to the spring to simulate the maximum working load that the spring will bear in actual service.
[0006] Preferably, the connecting column is provided with a through hole A, and the connecting pipe is provided with a through hole B. The through holes A and B are used to connect the upper base and the lower base.
[0007] Preferably, the upper pressure plate is provided with a positioning ring A, and the lower pressure plate is provided with a positioning ring B. The positioning ring A and the positioning ring B are adapted to the end ring of the spring to be processed, and are used to position the spring and prevent it from shifting.
[0008] Preferably, the upper and lower pressure plates have circular cross-sections, and their diameters are larger than the outer diameter of the spring end ring to be processed.
[0009] Preferably, after the upper base and the lower base are connected, the load applied to the spring by the upper pressure plate and the lower pressure plate is equal to the maximum working load that the spring bears in actual service.
[0010] The advantages of this utility model compared with the prior art are:
[0011] The prestressed shot blasting fixture described in this utility model connects the upper and lower bases during shot blasting of springs, clamps the spring between the upper and lower pressure plates, and applies a controllable and specific static load to the spring to simulate the maximum working load that the spring bears in actual service. This strengthens the spring under working stress, and the resulting residual compressive stress field is closer to the ideal distribution under service conditions, more effectively offsetting the working stress and improving the life of the spring. Attached Figure Description
[0012] Figure 1 This is a schematic diagram showing the state of this utility model in use;
[0013] Figure 2 This is a structural diagram of the upper base;
[0014] Figure 3 This is a structural diagram of the lower base.
[0015] In the diagram: 1. Upper base; 11. Connecting column; 111. Through hole A; 12. Positioning ring A; 13. Upper pressure plate; 2. Spring; 3. Bolt; 4. Lower base; 41. Connecting pipe; 411. Through hole B; 42. Positioning ring B; 43. Lower pressure plate. Detailed Implementation
[0016] The present invention will be further described below with reference to specific embodiments.
[0017] However, the description of this utility model is only a structural or even functional description of the embodiments, and the scope of the present utility model is not limited by the embodiments described herein.
[0018] For example, multiple embodiments may have various modifications and forms, and it should be understood that the scope of this utility model includes equivalents that can realize the technical concept.
[0019] like Figures 1-3 As shown, this embodiment is achieved through the following technical solution: it includes an upper base 1 and a lower base 4. The upper base 1 is provided with an upper pressure plate 13, and a connecting column 11 is fixed in the center of the upper pressure plate 13. The lower base 4 is provided with a lower pressure plate 43, and a connecting pipe 41 adapted to the connecting column 11 is provided in the center of the lower pressure plate 43. The upper base 1 and the lower base 4 are detachably connected.
[0020] In this embodiment, the connecting column 11 has a through hole A111, and the connecting pipe 41 has a through hole B411. Through holes A111 and B411 are used to connect the upper base 1 and the lower base 4. The upper pressure plate 13 has a positioning ring A12, and the lower pressure plate 43 has a positioning ring B42. Positioning rings A12 and B42 are adapted to the end ring of the spring to be processed, used to position the spring and prevent its displacement. The upper pressure plate 13 and the lower pressure plate 43 have circular cross-sections, and their diameters are larger than the outer diameter of the end ring of the spring to be processed. After the upper base 1 and the lower base 4 are connected, the load applied to the spring by the upper pressure plate 13 and the lower pressure plate 43 is equal to the maximum working load that the spring will bear in actual service.
[0021] The method of using this utility model is as follows:
[0022] 1. Place the lower base 4 on the testing machine, put the spring 2 on the lower base 4, and position it by the positioning ring B42;
[0023] 2. Insert the connecting post 11 of the upper base into the connecting tube 41, making sure that the through hole A111 and the through hole B411 are on the same side when inserting.
[0024] 3. Compress spring 2 and tooling with the testing machine until through hole A111 and through hole B411 are coaxial. At this time, pass bolt 3 through through hole A111 and through hole B411 to connect upper base 1 and lower base 4.
[0025] 4. Place the connected tooling and spring 2 into the shot blasting machine for shot blasting.
[0026] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.
Claims
1. A prestressed shot blasting fixture, characterized in that, It includes an upper base (1) and a lower base (4). The upper base (1) is provided with an upper pressure plate (13), and a connecting column (11) is fixed in the center of the upper pressure plate (13). The lower base (4) is provided with a lower pressure plate (43), and a connecting pipe (41) adapted to the connecting column (11) is provided in the center of the lower pressure plate (43). The upper base (1) and the lower base (4) are detachably connected.
2. The prestressed shot blasting fixture according to claim 1, characterized in that, The connecting column (11) is provided with a through hole A (111), and the connecting pipe (41) is provided with a through hole B (411).
3. The prestressed shot blasting fixture according to claim 1, characterized in that, The upper pressure plate (13) is provided with a positioning ring A (12), and the lower pressure plate (43) is provided with a positioning ring B (42). The positioning ring A (12) and the positioning ring B (42) are adapted to the end ring of the spring to be processed.
4. The prestressed shot blasting fixture according to claim 1, characterized in that, The upper pressure plate (13) and the lower pressure plate (43) have circular cross-sections, and their diameters are larger than the outer diameter of the spring end ring to be processed.
5. The prestressed shot blasting fixture according to claim 4, characterized in that, After the upper base (1) and the lower base (4) are connected, the load applied to the spring by the upper pressure plate (13) and the lower pressure plate (43) is equal to the maximum working load that the spring bears in actual service.