A shot blasting device for surface strengthening of a crankshaft

Abstract

The utility model discloses a kind of shot blasting device of elbow shaft surface strengthening treatment, it is related to shot blasting device technical field, including processing bin, the top of the processing bin is fixedly connected with energy supply bin, the bottom of the processing bin is fixedly connected with collection bin, the top of the processing bin is clamped with inclined pre-filter screen by opening mouth, the cavity of the processing bin is fixedly connected with clamping disc between two ends by transmission mechanism, two ends The clamping disc position corresponds, the lateral wall of the processing bin is fixedly connected with shot blasting collection Roots blower.The processing bin provided by the utility model is based on the basis of facilitating overall uniform shot blasting treatment of elbow shaft to improve strengthening effect, while strengthening filtration separation function when recycling to avoid causing blockage, to solve the problems, such as shot blasting dead angle, poor strengthening effect in the processing of traditional elbow shaft shot blasting device, single filter screen of recovery system is difficult to separate impurities, causes nozzle failure, channel blockage, low efficiency.

Description

Technical Field

[0001] This utility model relates to the field of shot peening equipment technology, and specifically to a shot peening equipment for surface strengthening treatment of a crank shaft. Background Technology

[0002] The shot peening device for crankshaft surface strengthening treatment is a specialized device that uses high-speed shot to impact the surface of the crankshaft to improve its surface stress state, increase hardness and fatigue life.

[0003] A search revealed the following publication (announcement) number: CN213624260U, entitled: "A Circulating Shot Peening Device," comprising a housing, a feeding mechanism at the top of the housing, a first connecting pipe connected to the bottom of the feeding mechanism, and an impeller connected to the bottom of the first connecting pipe, with multiple shot peening ports formed on the outer circumference of the impeller. In this invention, by rotating the two impeller blades on the adjusting rod and moving them to a suitable position, they are connected via a rod and a hole, thereby fixing the position of the impeller blades. This creates openings of different sizes between the two impeller blades, thus adjusting the amount and power of shot peening.

[0004] The above technical solution has the following shortcomings;

[0005] In the above-mentioned solutions, the shot peening nozzles are mostly fixed or only move linearly during actual use. However, the crankshaft has multiple bends and shaft sections of different diameters, making it difficult for the nozzles to adapt to its complex shape. This easily leads to shot peening dead zones at bends and shaft section transition areas, resulting in insufficient reinforcement layer thickness and uneven hardness in these areas. This affects the fatigue strength and lifespan of the crankshaft and cannot meet the requirements of high-precision transmission fields. Furthermore, traditional shot peening recovery systems use a single filter screen, resulting in a high degree of mixing between the shot and impurities such as oxide scale and metal debris. This makes efficient classification and separation difficult, and fine impurities easily circulate with the shot, causing nozzle blockage and wear, scratching the crankshaft surface, and the accumulation of impurities can also block the recovery channel, requiring frequent shutdowns for cleaning, reducing operating efficiency and increasing maintenance costs. Utility Model Content

[0006] In view of the problems existing in the shot peening device for surface strengthening treatment of crank shafts, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a shot peening device for strengthening the surface of a crank shaft, which solves the problems of shot peening dead angles, poor strengthening effect, and difficulty in separating impurities by a single filter screen in the recovery system, leading to nozzle failure, channel blockage, and low efficiency in traditional crank shaft shot peening devices.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A shot peening device for surface strengthening treatment of a crankshaft includes a treatment chamber, a power supply chamber fixedly connected to the top of the treatment chamber, a collection chamber fixedly connected to the bottom of the treatment chamber, an inclined pre-filter screen clamped to the top of the treatment chamber through an opening, a clamping plate fixedly connected between the two ends of the cavity of the treatment chamber through a transmission mechanism, the clamping plates at the two ends being positioned correspondingly, a shot peening collection Roots blower fixedly connected to the side wall of the treatment chamber, an inlet pipe end of the shot peening collection Roots blower fixedly connected to an suction plate, and the suction plate being fixedly connected to the outlet of the collection chamber.

[0010] An electric guide rail is fixedly connected inside the processing chamber. A support arm is fixedly connected to the moving end of the electric guide rail. An L-shaped support plate is fixedly connected to the side wall of the support arm. A shot peening nozzle is fixedly connected to one end surface of the L-shaped support plate through an opening. An energy supply mechanism is provided inside the energy supply chamber. Impurity adsorption plates are fixedly connected to the side walls of both ends of the collection chamber through openings. Separation and interception nets are fixedly connected to the side walls of the impurity adsorption plates at both ends through openings. A negative pressure fan is fixedly connected to one end of the collection chamber. A separation and filtration mechanism is provided between the negative pressure fan and the impurity adsorption plates at both ends. A display controller is fixedly connected to the side wall of the collection chamber.

[0011] Preferably, the transmission mechanism includes a motor, a hydraulic rod, and a rotating support block. The motor is fixedly connected to one side wall of the processing chamber, and the hydraulic rod is fixedly connected to the other side wall of the processing chamber. One end of the hydraulic rod passes through the side wall of the processing chamber and is rotatably connected to the rotating support block. The other end of the motor passes through the side wall of the processing chamber and is fixedly connected to the side wall of the corresponding clamping plate. The side wall of the rotating support block is fixedly connected to the side wall of the corresponding clamping plate.

[0012] Preferably, the power supply mechanism includes a storage bin, a feeding bin, a control valve, and a compressed gas control valve. The storage bin is fixedly connected to the top of the power supply bin, and the feeding bin is fixedly connected to the bottom of the power supply bin. A control valve is fixedly connected between the feeding bin and the storage bin. A compressed gas control valve is fixedly connected to the side wall of the feeding bin. The output pipe end of the feeding bin is fixedly connected to the input port of the shot peening nozzle, and the output pipe end of the shot peening collecting Roots blower is fixedly connected to the inlet of the storage bin.

[0013] Preferably, the separation and filtration mechanism includes a separation chamber, an inclined filter screen, and a connecting pipe. The separation chamber is fixedly connected to the side wall of the collection chamber, and the inclined filter screen is fixedly connected to the cavity of the separation chamber. The top inlet and bottom outlet of the separation chamber are both fixedly connected to the connecting pipe, and the other ends of the connecting pipes are respectively fixedly connected to the air outlet of the corresponding impurity adsorption plate or the air inlet of the negative pressure fan.

[0014] Preferably, the surfaces of the clamping discs at both ends are fixedly connected with rubber anti-slip protective pads.

[0015] Furthermore, one end of the separation chamber has a threaded chip discharge port at its bottom, and a sealing cap is threadedly connected to it.

[0016] Preferably, the inner wall surface and the outer peripheral surface of the outlet end of the shot peening nozzle are coated with a tungsten carbide-based wear-resistant coating, the inner wall surface of the treatment chamber and the surface of the guide rail slider of the electric guide rail are coated with an epoxy resin anti-corrosion coating, and the mesh surface of the separation interception net and the inclined filter net are coated with a polytetrafluoroethylene non-stick coating.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] 1. This utility model utilizes an electric guide rail to drive the shot peening nozzle to move axially along a crank shaft. In conjunction with the motor in the transmission mechanism, the clamping plate and the crank shaft are rotated, achieving shot peening of the entire surface of the crank shaft. The hydraulic rod can be adapted to crank shafts of different lengths. The rotating support block avoids rotational jamming, and the clamping plate ensures that the crank shaft does not deviate. This effectively eliminates the shot peening dead zones of traditional devices, significantly improves the surface strengthening uniformity of the crank shaft, and ensures stable strengthening quality.

[0019] 2. This utility model utilizes an inclined pre-filter to initially filter large particles of impurities, an impurity adsorption plate to adsorb fine dust, and a separation interception net to intercept medium-sized impurities. Then, the impurities are further separated by the separation chamber and the inclined filter in the separation filtration mechanism, achieving efficient layered separation of shot blasting, impurities, and dust. This avoids impurities clogging the nozzle and channels. The installed shot blasting collection Roots blower transports the pure shot back to the storage silo for recycling. The shot blasting recovery rate and material utilization rate are significantly improved, reducing waste and the risk of equipment failure.

[0020] 3. This utility model utilizes a display controller to monitor key parameters such as shot peening pressure and guide rail position in real time, facilitating precise control by operators. A rubber anti-slip protective pad protects the crankshaft surface from scratches, while the threaded chip discharge port and sealing cap facilitate impurity cleaning and prevent dust leakage. Functional coatings such as tungsten carbide-based wear-resistant coating and epoxy resin anti-corrosion coating enhance the wear resistance and corrosion resistance of components, extending the device's service life and ensuring a clean working environment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front sectional view of the present invention;

[0024] Figure 3 This is a side sectional view of the present invention;

[0025] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of part A.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Processing bin; 2. Power supply bin; 3. Collection bin; 4. Inclined pre-filter; 5. Clamping disc; 6. Shot peening collection Roots blower; 7. Suction plate; 8. Electric guide rail; 9. Support arm; 10. L-shaped support plate; 11. Shot peening nozzle; 12. Impurity adsorption plate; 13. Separation and interception net; 14. Negative pressure fan; 15. Display controller; 16. Motor; 17. Hydraulic rod; 18. Rotating support block; 19. Storage bin; 20. Feeding bin; 21. Control valve; 22. Compressed gas control valve; 23. Separation bin; 24. Inclined filter; 25. Connecting pipe; 26. Rubber anti-slip protective pad; 27. Threaded chip discharge port; 28. Sealing cover. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model discloses a shot peening device for surface strengthening treatment of crank shafts.

[0030] This utility model provides, for example Figures 1-4 The shot peening device for surface strengthening treatment of a crankshaft shown includes a treatment chamber 1, a power supply chamber 2 fixedly connected to the top of the treatment chamber 1, a collection chamber 3 fixedly connected to the bottom of the treatment chamber 1, an inclined pre-filter 4 clamped to the top of the treatment chamber 1 through an opening, a clamping plate 5 fixedly connected between the two ends of the cavity of the treatment chamber 1 through a transmission mechanism, the clamping plates 5 at the two ends are correspondingly positioned, a shot peening collection Roots blower 6 fixedly connected to the side wall of the treatment chamber 1, an suction plate 7 fixedly connected to the inlet pipe end of the shot peening collection Roots blower 6, and the suction plate 7 and the outlet of the collection chamber 3 fixedly connected.

[0031] An electric guide rail 8 is fixedly connected inside the cavity of the processing chamber 1. A support arm 9 is fixedly connected to the moving end of the electric guide rail 8. An L-shaped support plate 10 is fixedly connected to the side wall of the support arm 9. A shot peening nozzle 11 is fixedly connected to one end of the L-shaped support plate 10 through an opening. An energy supply mechanism is provided inside the cavity of the power supply chamber 2. Impurity adsorption plates 12 are fixedly connected to the side walls of both ends of the cavity of the collection chamber 3 through openings. Separation and interception nets 13 are fixedly connected to the side walls of the impurity adsorption plates 12 through openings. A negative pressure fan 14 is fixedly connected to one end of the cavity of the collection chamber 3. A separation and filtration mechanism is provided between the negative pressure fan 14 and the impurity adsorption plates 12. A display controller 15 is fixedly connected to the side wall of the collection chamber 3. The processing chamber 1 provides a sealed working space for shot peening of the crank shaft, preventing shot splatter and dust leakage and ensuring a clean working environment. The power supply chamber 2 provides installation and protection space for the shot peening supply system, ensuring stable operation of the power supply components. The collection chamber 3 centrally recovers shot and impurities, preventing material spillage and contamination. The inclined pre-filter 4 pre-filters large particles generated during shot peening, preventing them from entering the subsequent recovery channel and causing blockages. The clamping plate 5 securely holds the crank shaft, ensuring no displacement during shot peening and improving strengthening uniformity. The shot peening collection Roots blower 6 provides strong suction, significantly improving the shot recovery rate and reducing... To minimize material waste, the suction plate 7 increases the suction area, ensuring efficient intake of shot and impurities from the collection chamber 3 and preventing residue. The electric guide rail 8 drives the shot peening nozzle 11 to move axially along the crankshaft, achieving full surface coverage of the crankshaft with the help of a transmission mechanism. The support arm 9 and L-shaped support plate 10 provide stable support for the shot peening nozzle 11, ensuring precise spray angle. The shot peening nozzle 11 propels the shot at high speed onto the crankshaft surface for surface strengthening. A power supply mechanism continuously supplies shot and compressed gas to the shot peening nozzle 11, ensuring stable spray intensity. The impurity adsorption plate 12 adsorbs and recovers fine dust from the material, improving shot purity and efficiency. The set separation and interception net 13 intercepts medium-sized impurities to prevent them from entering the negative pressure fan 14 and causing damage. The set negative pressure fan 14 provides power for impurity adsorption and separation, ensuring stable airflow in the collection chamber 3. The set separation and filtration mechanism achieves efficient separation of shot peening, impurities, and dust, avoiding nozzle clogging. The set display controller 15 displays parameters such as shot peening pressure, guide rail position, and fan speed in real time, facilitating precise control by operators. Through the "moving spray + multi-stage separation" design, it solves the problems of shot peening dead angles, poor strengthening effect, and nozzle failure, channel blockage, and low efficiency caused by the single filter screen of the recovery system, which is difficult to separate impurities.

[0032] To achieve stable clamping and rotation of the crankshaft and eliminate shot peening dead zones, such as Figure 1 and 2As shown, the transmission mechanism includes a motor 16, a hydraulic rod 17, and a rotating support block 18. The motor 16 is fixedly connected to one side wall of the processing chamber 1, and the hydraulic rod 17 is fixedly connected to the other side wall of the processing chamber 1. One end of the hydraulic rod 17 passes through the side wall of the processing chamber 1 and is rotatably connected to the rotating support block 18. The other end of the motor 16 passes through the side wall of the processing chamber 1 and is fixedly connected to the side wall of the corresponding clamping plate 5. The side wall of the rotating support block 18 is fixedly connected to the side wall of the corresponding clamping plate 5. The motor 16 drives the clamping plate 5 to slowly rotate the crank shaft, which, together with the electric guide rail 8, achieves 360° shot peening of the crank shaft without dead angles. The hydraulic rod 17 can adjust the clamping distance according to the length of the crank shaft to adapt to crank shafts of different lengths. The rotating support block 18 ensures that the clamping plate 5 rotates synchronously with the crank shaft, avoiding rotation jamming that leads to uneven strengthening and improving the surface strengthening consistency of the crank shaft.

[0033] To provide a stable supply of shot and gas to the shot peening nozzle and ensure the peening effect, such as Figure 2 and 3 As shown, the power supply mechanism includes a storage bin 19, a feeding bin 20, a control valve 21, and a compressed gas control valve 22. The storage bin 19 is fixedly connected to the top of the cavity of the power supply bin 2, and the feeding bin 20 is fixedly connected to the bottom of the cavity of the power supply bin 2. The control valve 21 is fixedly connected between the feeding bin 20 and the storage bin 19. The compressed gas control valve 22 is fixedly connected to the side wall of the feeding bin 20. The output pipe end of the feeding bin 20 is fixedly connected to the input port of the shot peening nozzle 11. The output pipe end of the shot peening collection Roots blower 6 is connected to the storage bin 19. The inlet is fixedly connected, and the storage bin 19 stores a sufficient amount of shot to meet the needs of continuous operation. The feeding bin 20 mixes the shot with compressed gas to ensure uniform shot delivery. The control valve 21 adjusts the shot supply to adapt to different strengthening requirements. The compressed gas control valve 22 controls the injection pressure to ensure stable shot impact strength. The shot collection Roots blower 6 transports the recovered shot back to the storage bin 19, realizing shot recycling and significantly improving material utilization.

[0034] To achieve efficient separation of shot peening, impurities, and dust, and to prevent secondary pollution, such as Figure 1 , 2As shown in Figure 4, the separation and filtration mechanism includes a separation chamber 23, an inclined filter screen 24, and a connecting pipe 25. The separation chamber 23 is fixedly connected to the side wall of the collection chamber 3. The inclined filter screen 24 is fixedly connected to the cavity of the separation chamber 23. The top inlet and bottom outlet of the separation chamber 23 are both fixedly connected to the connecting pipe 25. The other ends of the connecting pipes 25 are fixedly connected to the air outlet of the corresponding impurity adsorption plate 12 or the air inlet of the negative pressure fan 14, respectively. The separation chamber 23 provides an independent space for the separation operation, preventing impurities from flowing back to the collection chamber 3. The inclined filter screen 24 further filters the fine impurities in the shot peening, significantly improving the shot peening purity. At the same time, the inclined structure facilitates the sliding of impurities. The connecting pipe 25 ensures stable airflow and material flow, avoids blockage, and ensures separation efficiency.

[0035] To protect the crankshaft surface from scratches and to enhance clamping friction, such as Figure 2 As shown, rubber anti-slip protective pads 26 are fixedly connected to the surfaces of the clamping discs 5 at both ends. The rubber anti-slip protective pads 26 can buffer the clamping force and avoid damage or scratches to the surface of the crank shaft, thus significantly improving the product qualification rate. The rubber material has high friction, which prevents the crank shaft from slipping when rotating and ensures rotational stability.

[0036] To facilitate the removal of impurities and ensure the sealing of the separation chamber, such as Figure 1 , 2 As shown in Figure 4, one end of the separation chamber 23 has a threaded chip discharge port 27 at its bottom, and a sealing cover 28 is threadedly connected to it. The threaded chip discharge port 27 facilitates the regular cleaning of impurities accumulated in the separation chamber 23, significantly improving cleaning efficiency. The sealing cover 28 is threadedly connected to achieve a tight seal, preventing dust leakage and ensuring a clean working environment.

[0037] To improve the wear resistance, corrosion resistance, and anti-adhesion properties of key components and extend their service life, such as... Figures 2-4 As shown, the inner wall surface and the outer peripheral surface of the outlet end of the shot peening nozzle 11 are coated with a tungsten carbide-based wear-resistant coating. The inner wall surface of the treatment chamber 1 and the surface of the guide rail slider of the electric guide rail 8 are coated with an epoxy resin anti-corrosion coating. The mesh surface of the separation interception net 13 and the inclined filter net 24 are coated with a polytetrafluoroethylene non-stick coating. The tungsten carbide-based wear-resistant coating significantly improves the wear resistance of the shot peening nozzle 11, resisting the high-speed impact and wear of the shot. The epoxy resin anti-corrosion coating prevents the inner wall of the treatment chamber 1 and the guide rail slider from rusting, significantly extending the service life. The polytetrafluoroethylene non-stick coating prevents impurities from sticking to the filter screen surface, reducing the frequency of filter screen cleaning and ensuring long-term stable filtration effect.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A shot peening apparatus for surface strengthening treatment of a crank shaft, comprising a treatment chamber (1), characterized in that, The top of the processing chamber (1) is fixedly connected to the power supply chamber (2), the bottom of the processing chamber (1) is fixedly connected to the collection chamber (3), the top of the processing chamber (1) is clamped with an inclined pre-filter (4) through an opening, the two ends of the cavity of the processing chamber (1) are fixedly connected to a clamping plate (5) through a transmission mechanism, the two ends of the clamping plate (5) are in corresponding positions, the side wall of the processing chamber (1) is fixedly connected to a shot peening collection Roots blower (6), the inlet pipe end of the shot peening collection Roots blower (6) is fixedly connected to a suction plate (7), and the suction plate (7) and the outlet of the collection chamber (3) are fixedly connected; An electric guide rail (8) is fixedly connected inside the cavity of the processing chamber (1). A support arm (9) is fixedly connected to the moving end of the electric guide rail (8). An L-shaped support plate (10) is fixedly connected to the side wall of the support arm (9). A shot peening nozzle (11) is fixedly connected to one end surface of the L-shaped support plate (10) through an opening. An energy supply mechanism is provided inside the cavity of the power supply chamber (2). Impurity adsorption plates (12) are fixedly connected to the side walls of both ends of the cavity of the collection chamber (3) through openings. Separation and interception nets (13) are fixedly connected to the side walls of the impurity adsorption plates (12) at both ends through openings. A negative pressure fan (14) is fixedly connected to one end of the cavity of the collection chamber (3). A separation and filtration mechanism is provided between the negative pressure fan (14) and the impurity adsorption plates (12) at both ends. A display controller (15) is fixedly connected to the side wall of the collection chamber (3).

2. The shot peening device for surface strengthening treatment of a crank shaft according to claim 1, characterized in that, The transmission mechanism includes a motor (16), a hydraulic rod (17), and a rotating support block (18). The motor (16) is fixedly connected to one side wall of the processing chamber (1), and the hydraulic rod (17) is fixedly connected to the other side wall of the processing chamber (1). One end of the hydraulic rod (17) passes through the side wall of the processing chamber (1) and is rotatably connected to the rotating support block (18). The other end of the motor (16) passes through the side wall of the processing chamber (1) and is fixedly connected to the side wall of the corresponding clamping plate (5). The side wall of the rotating support block (18) is fixedly connected to the side wall of the corresponding clamping plate (5).

3. The shot peening device for surface strengthening treatment of a crank shaft according to claim 1, characterized in that, The power supply mechanism includes a storage bin (19), a feeding bin (20), a control valve (21), and a compressed gas control valve (22). The storage bin (19) is fixedly connected to the top of the cavity of the power supply bin (2), and the feeding bin (20) is fixedly connected to the bottom of the cavity of the power supply bin (2). The control valve (21) is fixedly connected between the feeding bin (20) and the storage bin (19). The compressed gas control valve (22) is fixedly connected to the side wall of the feeding bin (20). The output pipe end of the feeding bin (20) is fixedly connected to the input port of the shot peening nozzle (11), and the output pipe end of the shot peening collecting Roots blower (6) is fixedly connected to the inlet of the storage bin (19).

4. The shot peening device for surface strengthening treatment of a crank shaft according to claim 1, characterized in that, The separation and filtration mechanism includes a separation chamber (23), an inclined filter screen (24), and a connecting pipe (25). The separation chamber (23) is fixedly connected to the side wall of the collection chamber (3). The inclined filter screen (24) is fixedly connected to the cavity of the separation chamber (23). The top inlet and bottom outlet of the separation chamber (23) are both fixedly connected to the connecting pipe (25). The other ends of the connecting pipes (25) are fixedly connected to the air outlet of the corresponding impurity adsorption plate (12) or the air inlet of the negative pressure fan (14), respectively.

5. The shot peening device for surface strengthening treatment of a crank shaft according to claim 1, characterized in that, Rubber anti-slip protective pads (26) are fixedly connected to the surfaces of the clamping discs (5) at both ends.

6. The shot peening device for surface strengthening treatment of a crank shaft according to claim 4, characterized in that, The bottom of one end of the separation chamber (23) is provided with a threaded chip discharge port (27) and a sealing cap (28) is threadedly connected to it.

7. The shot peening device for surface strengthening treatment of a crank shaft according to claim 1, characterized in that, The inner wall surface and the outer peripheral surface of the outlet end of the shot peening nozzle (11) are coated with a tungsten carbide-based wear-resistant coating. The inner wall surface of the treatment chamber (1) and the surface of the guide rail slider of the electric guide rail (8) are coated with an epoxy resin anti-corrosion coating. The mesh surface of the separation interception net (13) and the inclined filter net (24) is coated with a polytetrafluoroethylene non-stick coating.

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