Automatic shot peening device for crankshaft

Abstract

The utility model discrum automatic shot blasting device, through shot blasting chamber support and removal slide support parallel setting, removal slide passes through the slider and is in the guide rail, and the guide rail is equipped with rack and removal slide motor gear connection, and shot blasting chamber is in shot blasting chamber support, and the roller way parallel guide rail, and the parallel roller way of many roots autorotation axis and is in bearing seat, and the autorotation axis is equipped with the protective sleeve on, and the discrum support circle can be dismantled and is in the protective sleeve, and the autorotation axis both ends install double chain wheel and pass through the chain connection, and autorotation axis motor is connected with at least one autorotation axis. One end of removal apron is connected with removal slide, and the other end is located on the roller way, and removal apron top is in shot gun angle pivot support, and shot gun angle pivot passes through bearing and clamping device and is installed on shot gun angle pivot support, and shot gun passes through the ring and removal apron and is installed in removal apron bottom, and shot gun angle pivot one end installs hand wheel. The device can realize the comprehensive shot blasting treatment to different length discrum, and improve the surface quality and production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing equipment for shot peening in crankshaft machining, and specifically relates to an automatic shot peening device for crankshafts. Background Technology

[0002] In crankshaft machining, shot blasting is a crucial step in improving the surface quality and performance of the crankshaft. However, existing crankshaft-specific shot blasting machines have several problems: their four blasting heads are fixed in position, and adjusting the directional sleeve cannot meet the shot blasting needs of more than thirty types of crankshafts with lengths ranging from 450 to 1200 mm; for crankshafts longer than 900 mm, the gap between the balance blocks at both ends is too small for the steel shot to directly reach, and the amount of rebounding steel shot is insufficient to completely blast the area, resulting in poor shot blasting effect, affecting product quality, increasing shot blasting time, and reducing production efficiency. Furthermore, partially blasted crankshafts require additional time from shot blasting personnel and forklift operators, increasing production costs. Moreover, crankshaft-specific shot blasting machines are large rotary tables with two internal and external stations; crankshaft burrs fall onto the screen at the bottom of the shot blasting chamber, requiring cleaning twice daily, otherwise clogging the screen and preventing steel shot from flowing into the return spiral, eventually causing the large rotary table to jam. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides an automatic shot peening device for crankshafts. Its purpose is to achieve comprehensive shot peening treatment of crankshafts of different lengths, ensure crankshaft surface quality, improve production efficiency, reduce shot peening time caused by incomplete local peening, reduce production costs, and effectively solve the problem of frequent equipment maintenance and the problems existing in the current crankshaft shot peening equipment when processing crankshafts of different lengths and structures.

[0004] To achieve the above objectives, the specific solution of this utility model is as follows:

[0005] The automatic shot peening device for crankshaft includes a movable slide bracket, a shot peening chamber bracket, a guide rail, a slider, a movable slide, a rack, a shot peening chamber, a roller conveyor, a movable cover plate, a rotating shaft, a rotating shaft bearing seat, a protective sleeve, a crankshaft support disc, a spray gun angle rotating shaft, a spray gun angle rotating shaft bracket, a spray gun angle rotating shaft clamping device, and a spray gun angle rotating shaft handwheel.

[0006] The shot peening chamber support and the movable slide support are arranged in parallel. The top two sides of the movable slide support are respectively provided with guide rails. The movable slide is mounted on the guide rails by a slider. A rack is provided between the two guide rails. The rack is mounted on a rack mounting beam. The two ends of the rack mounting beam are respectively mounted on the movable slide support.

[0007] The shot peening chamber is mounted on a shot peening chamber support. Two roller conveyors are parallel to the guide rails and are mounted on both sides of the shot peening chamber. Multiple rotating shafts are parallel to the roller conveyors, and both ends of the rotating shafts extend out of the shot peening chamber and are mounted on rotating shaft bearing seats. The rotating shaft bearing seats are mounted on both sides of the shot peening chamber. Each rotating shaft is fitted with a protective sleeve. Two crankshaft support discs are detachably mounted on the protective sleeves. Each rotating shaft has a double sprocket mounted at both ends, and the double sprockets are connected by a chain. The two crankshaft support discs are mounted on the protective sleeves by screw and nut assemblies, and the distance between the two crankshaft support discs is adjustable according to the length of the crankshaft.

[0008] One end of the movable cover plate is connected to one end of the movable slide plate, and the other end of the movable cover plate is located on the roller conveyor. Spray gun angle shaft brackets are respectively installed on both sides of the top of the movable cover plate. The two ends of the two spray gun angle shafts are respectively installed on the spray gun angle shaft brackets through bearings. A spray gun angle shaft clamping device is provided between the two spray gun angle shaft brackets. The spray gun angle shaft is clamped through the spray gun angle shaft clamping device. A ring is provided on the spray gun angle shaft. The spray gun passes through the ring and the movable cover plate and is installed at the bottom of the movable cover plate. A spray gun angle shaft handwheel is installed at one end of each spray gun angle shaft.

[0009] Furthermore, it includes a shot blasting machine and a dust collector, wherein the shot blasting machine is connected to a shot blasting gun, a dust collection pipe is provided on one side of the shot blasting chamber, and the dust collector is connected to the dust collection pipe.

[0010] Furthermore, it also includes a PLC control system, which comprises a PLC controller, a frequency converter, contactors, relays, a touch screen, proximity switches for the initial and stop positions, buttons, an incremental encoder, a moving slide motor, a spindle motor, and a power supply. The frequency converter, contactors, relays, touch screen, proximity switches for the initial and stop positions, buttons, incremental encoder, shot peening machine, and dust collector are respectively connected to the PLC controller. The frequency converter and contactors are respectively connected to the relays. The moving slide motor is connected to the frequency converter, and the incremental encoder is connected to... An encoder coupling is installed at the end of the rotor shaft of the mobile skateboard motor. The self-rotating shaft motor is connected to a contactor. Proximity switch sensors for the initial position and the stop position are installed at both ends of each guide rail. The mobile skateboard motor is installed on the top of the mobile skateboard, and the drive gear of the mobile skateboard motor passes through the mobile skateboard and meshes with the rack. A single sprocket is installed on the self-rotating shaft motor. The single sprocket is connected to a double sprocket on at least one self-rotating shaft through a chain. The power supply provides the working voltage for the PLC controller, relays, frequency converters, contactors, proximity switch sensors, touch screen, buttons, mobile skateboard motor, and self-rotating shaft motor.

[0011] Furthermore, the spray gun angle shaft clamping device includes a fixed bracket, a fixed clamping plate, and a movable clamping plate. The two fixed clamping plates are respectively installed on one side of the fixed bracket, and the other side of the fixed bracket is respectively provided with a pin ear. One end of each movable clamping plate is installed on the pin ear by a pin and a locking pin, and the other end of each movable clamping plate is connected to each fixed clamping plate by a screw and nut assembly. The two spray gun angle shafts are respectively clamped between the fixed clamping plate and the movable clamping plate, and the two movable clamping plates are respectively provided with an arc-shaped groove adapted to the spray gun angle shaft, and the arc-shaped groove is provided with wear-resistant rubber.

[0012] Furthermore, the shot peening chamber includes a connecting frame, a rotating shaft support frame, a shot hopper, a hopper disc, and a hopper cylinder. The connecting frame is U-shaped. The rotating shaft support frame is installed on the top of the connecting frame. Each rotating shaft has its two ends extending out of the rotating shaft support frame and installed on a rotating shaft bearing seat. The two rotating shaft bearing seats are symmetrically installed on both sides of the connecting frame. The shot hopper is installed at the bottom of the connecting frame. The shot hopper is formed by connecting a hopper side plate and a hopper bottom plate to form an inverted trapezoid. The hopper disc is installed on the top of the hopper cylinder, and the bottom of the hopper cylinder is installed on the hopper bottom plate. The rotating shaft motor is installed on the shot peening chamber bracket.

[0013] Furthermore, the roller conveyor includes a roller frame, roller shafts, bearing sleeves, rollers, and locking rings. The roller frame is rectangular, and multiple bearing sleeves are arranged in a linear array within the roller frame. Each bearing sleeve contains a bearing. Multiple rollers are connected to roller shafts, and each roller shaft passes through a bearing and is connected to a locking ring. The top surface of the roller is 0.5 mm higher than the top surface of the self-rotating shaft support frame.

[0014] Furthermore, the two crankshaft support discs are respectively mounted on the protective sleeve by screw and nut assemblies, and the distance between the two crankshaft support discs is adjusted according to the length of the crankshaft.

[0015] Advantages of this utility model

[0016] This invention relates to an automatic crankshaft shot peening device that enables comprehensive shot peening of crankshafts of varying lengths, ensuring surface quality, improving production efficiency, and reducing shot peening time caused by incomplete local peening. It also reduces the additional time required for shot peening personnel and forklifts due to incomplete local peening, thus lowering production costs. Furthermore, the automatic shot peening device removes 95% of the burrs from the crankshaft before it is transferred to a dedicated crankshaft shot peening machine. This effectively solves the problem of screen clogging in the dedicated crankshaft shot peening machine, prevents the large turntable from jamming, and improves the stability and reliability of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the automatic shot peening device for crankshafts according to this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below.

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of an existing mobile skateboard motor.

[0020] Figure 4 for Figure 1 A schematic diagram of the shot peening chamber.

[0021] Figure 5 for Figure 4 A schematic diagram of the structure viewed from below.

[0022] Figure 6 for Figure 4 A schematic diagram of the structure on the left side.

[0023] Figure 7 for Figure 4 A schematic diagram of the connecting frame in the middle.

[0024] Figure 8 for Figure 1 A schematic diagram of the structure of the spray gun angle rotating shaft clamping device.

[0025] Figure 9 for Figure 8 A top-view structural diagram.

[0026] Figure 10 for Figure 8 A schematic diagram of the structure of the spray gun angle rotating shaft.

[0027] Figure 11 for Figure 1 A schematic diagram of the structure of the intermediate roller conveyor.

[0028] Figure 12 for Figure 11 A top-view structural diagram.

[0029] Figure 13 for Figure 1 Wiring diagram of the electrical control system.

[0030] Figure 14 for Figure 1 The circuit diagram of the self-rotating shaft motor control circuit.

[0031] In the picture:

[0032] 1. Mobile slide bracket; 2. Shot peening chamber bracket; 3. Mobile slide motor; 301. Drive gear shaft; 302. Bearing housing; 303. Motor support; 304. Coupling; 305. Gear reducer; 306. Angular contact ball bearing; 307. Nut; 308. Locking washer; 309. Flat key; 310. Encoder coupling sleeve; 311. Drive gear; 4. Incremental encoder; 5. Spray gun; 6. Mobile cover plate; 7. Rotating shaft motor; 8. Shot peening chamber; 801. Connecting frame; 802. Rotating shaft support frame; 803. Shot hopper; 804. Bucket side plate; 805. Bucket bottom plate; 806. Bucket cylinder; 807. Bucket bottom disc; 9. Moving slide plate; 10. Rack; 11. Rack mounting beam; 12. Guide rail; 13. Rotation shaft; 14. Slider; 15. Spray gun angle shaft handwheel; 16. Spray gun angle shaft clamping device; 161. Fixed bracket; 162. Fixed clamping plate; 163. Moving clamping plate; 164. Pin lug; 165. Pin; 166. Locking pin; 167. Arc groove; 168. Wear-resistant rubber; 169. Screw and nut assembly; 17. Crankshaft support disc;

[0033] 18. Roller conveyor; 181. Roller conveyor frame; 182. Roller; 183. Roller shaft; 184. Locking ring; 185. Bearing sleeve; 19. Self-rotating shaft bearing; 20. Chain; 21. Protective sleeve; 22. Double sprocket; 23. Dust removal duct; 24. Spray wall angle pivot; 25. Spray gun angle pivot bracket; 26. Dust collector; 27. Crankshaft-specific shot blasting machine; 28. Loading and unloading robot; 29. ​​Crankshaft production line. Detailed Implementation

[0034] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. It should be noted that the specific embodiments are not intended to limit the scope of the present invention.

[0035] like Figures 1 to 14 As shown, the automatic crankshaft shot peening device provided in this specific embodiment includes a movable slide bracket 1, a shot peening chamber bracket 2, a guide rail 12, a slider 14, a movable slide 9, a rack 10, a movable slide motor 3, a shot peening chamber 8, a roller conveyor 18, a movable cover plate 6, a protective sleeve 22, a rotating shaft 13, a rotating shaft bearing seat 19, a rotating shaft motor 7, a crankshaft support disc 17, a spray gun angle rotating shaft 24, a spray gun angle rotating shaft bracket 25, a spray gun angle rotating shaft clamping device 16, a spray gun angle rotating shaft handwheel 15, and a PLC control system.

[0036] The PLC controller selected is Siemens PLC200SMART, model 288-1SR60-0AA0.

[0037] The power supply is a 24V switching power supply, model ABL2REM24065K.

[0038] The selected relay is model RXM2LB2BD.

[0039] The product model of the touch screen is 6AV6648-0CE11-3AX0.

[0040] The product model of the button is ZB2-BE101C.

[0041] The product model of the contactor is LC1 NO9 01.

[0042] The product model of the frequency converter is Siemens MM420.

[0043] The product model of the proximity switch sensor is E2B-M18LN16-WZ-B1-PNP.

[0044] The incremental encoder is SICK's DBS36E-S3EK 360.

[0045] The mobile skateboard motor can be selected from a combination of a Shengbang 400W (3-10 speed ratio) vertical motor and a gear reducer, or it can be selected from... Figure 3 The mobile skateboard motor 3 shown includes a drive gear shaft 301, a bearing housing 302, a motor support 303, a coupling 304, a gear reducer 305, an angular contact ball bearing 306, a nut 307, a locking washer 308, a flat key 309, an encoder coupling sleeve 310, and a drive gear 311. The gear reducer motor 305 is connected to the top of the motor support 303 by screws. The drive gear shaft 301 is mounted in the bearing housing 302 via the angular contact ball bearing 306. A retaining washer 308 and a nut 307 are fitted onto the top of the drive gear shaft 301, and it is connected to the coupling 304 via a flat key 309. The output shaft of the gear reducer 305 is connected to the drive gear shaft 301 via the coupling 304. The bearing housing 302 is fastened to the bottom of the motor support 303 with screws. The bottom of the drive gear shaft 301 is connected to the drive gear 311, which meshes with the rack 11 mounted on the movable sliding bracket 1, so that the movable sliding plate motor 3 controls the movable sliding plate 9 to perform linear motion.

[0046] The self-rotating shaft motor 7 is a motor and reducer assembly with product model DRN80M4+S57 or DRN80M4 / DB1.

[0047] The shot peening chamber support 1 and the movable slide plate support 2 are arranged in parallel. The top two sides of the movable slide plate support 1 are respectively provided with guide rails 12. The movable slide plate 9 is mounted on the guide rails 12 through the slider 14. A rack 10 is provided between the two guide rails 12. The rack 10 is mounted on the rack mounting beam 11. The two ends of the rack mounting beam 11 are respectively mounted on the movable slide plate support 1. The movable slide plate motor 3 is mounted on the top of the movable slide plate 9, and the drive gear 311 of the movable slide plate motor 3 passes through the movable slide plate 9 and meshes with the rack 10, so that when the movable slide plate motor 3 rotates, it drives the movable slide plate 9 to move in a straight line to the left or right along the rack.

[0048] The shot peening chamber 8 is mounted on the shot peening chamber support 2. The roller conveyor 18 is a non-powered roller conveyor. The roller conveyor 18 includes a roller frame 181, roller shafts 183, bearing sleeves 185, rollers 182, and locking rings 184. The roller frame 181 is rectangular and made of steel. Multiple bearing sleeves 185 are arranged in a linear array inside the roller frame 181. Each bearing sleeve 185 contains a bearing. Multiple rollers 182 are connected to roller shafts 183 respectively. Each roller shaft 183 passes through the bearing and is connected to the locking ring 184. The top surface of the roller 182 is 0.5mm higher than the top surface of the self-rotating shaft support frame 802 to ensure that the moving cover plate 9 does not come into contact with the shot peening chamber 8 during movement, thus preventing steel shot from splashing.

[0049] Two roller conveyors 18 are parallel to the guide rails 12 and are installed on both sides of the shot peening chamber 8. In this embodiment, three rotating shafts 13 are provided, each parallel to the roller conveyors 18, with both ends of the three rotating shafts 13 extending out of the shot peening chamber 8 and mounted on rotating shaft bearing seats 19. The rotating shaft bearing seats 19 are installed on both sides of the shot peening chamber 8. Each rotating shaft 13 has a protective sleeve 22 connected to both ends by a key. Each protective sleeve 22 has a crankshaft support disc 17 installed on both sides to support the rotation of the crankshaft 30. Each rotating shaft 13 has a double sprocket 22 installed at both ends, and the double sprockets 22 are connected to each other by a chain 20. A single sprocket is installed on the rotating shaft motor 7, and the single sprocket is connected to the double sprocket 22 on at least one rotating shaft 13 by a chain. A dust collection pipe 23 for connecting to a dust collector is provided on one side of the shot peening chamber 8. Specifically, the shot peening chamber 8 includes a connecting frame 801, a rotation shaft support frame 802, a shot hopper 803, a hopper disc 806, and a hopper cylinder 807. The connecting frame 801 is a U-shaped frame. The rotation shaft support frame 802 is installed on the top of the connecting frame 801. Each rotation shaft 13 has its two ends passing through the rotation shaft support frame 802 and installed on the rotation shaft bearing seats 19. The two rotation shaft bearing seats 19 are symmetrically installed on both sides of the connecting frame 801. The shot hopper 803 is installed at the bottom of the connecting frame 801. The shot hopper 803 is formed by connecting the hopper side plate 804 and the hopper bottom plate 805 to form an inverted trapezoid. The hopper disc 807 is installed on the top of the hopper cylinder 806. The bottom of the hopper cylinder 806 is installed on the hopper bottom plate 805. The rotation shaft motor 7 is installed on one side of the shot peening chamber bracket 2.

[0050] One end of the movable cover plate 6 is connected to one end of the movable slide plate 9 by screws, and the other end of the movable cover plate 6 is located on the roller conveyor 18. Spray gun angle shaft brackets 25 are respectively installed on both sides of the top of the movable cover plate 6. The two ends of the two spray gun angle shafts 24 are respectively installed on the spray gun angle shaft brackets 25 by bearings. A spray gun angle shaft clamping device 16 is provided between the two spray gun angle shaft brackets 25. The spray gun angle shaft 24 is clamped through and clamped on the spray gun angle shaft clamping device 16. The spray gun angle shaft clamping device 16 is used to clamp and fix the spray gun angle shaft 24 whose angle has been adjusted. Specifically, the spray gun angle shaft clamping device 16 includes a fixed bracket 161, a fixed clamping plate 162, and a movable clamping plate 163. The two fixed clamping plates 162 are respectively installed on one side of the fixed bracket 161, and the other side of the fixed bracket 161 is respectively provided with a pin ear 164. One end of each movable clamping plate 163 is installed on the pin ear 164 through a pin 165 and a locking pin 166, and the other end of each movable clamping plate 163 is connected to each fixed clamping plate 162 through a screw and nut assembly 169. The two spray gun angle shafts 24 are respectively clamped between the fixed clamping plate 162 and the movable clamping plate 163, and the two movable clamping plates 163 are respectively provided with arc-shaped grooves 167 adapted to the spray gun angle shafts. Wear-resistant adhesive 168 is bonded in the arc-shaped grooves 167 to increase the friction between the spray gun angle shaft clamping device 16 and the spray gun angle shaft 24 and prevent shaking during operation.

[0051] A ring is provided on the spray gun angle shaft 13. The spray gun 5 passes through the ring and the movable cover plate 6 and is installed at the bottom of the movable cover plate 6. The purpose is to drive the movable slide plate 9 through the movable slide plate motor 3 to move the spray gun 5 installed at the bottom of the movable cover plate 6 towards the shot peening chamber 8 to the crankshaft that needs to be shot peened, so as to perform shot peening on the crankshaft that needs to be shot peened. Each spray gun angle shaft 13 is equipped with a spray gun angle shaft handwheel 15 at one end. The spray gun angle shaft 13 is adjusted by rotating the spray gun angle shaft 13 through the spray gun angle shaft handwheel 15.

[0052] The PLC control system includes a PLC controller, a frequency converter, contactors, relays, a touch screen, proximity switches, buttons, an incremental encoder, a moving slide motor, a self-rotating shaft motor, and a power supply. The frequency converter, contactors, relays, touch screen, proximity switches, and buttons are all connected to the PLC controller. The frequency converter and contactors are connected to the relays. The moving slide motor 3 is connected to the frequency converter, which is connected to the incremental encoder 4. The incremental encoder 4 is mounted on the end of the rotor shaft of the moving slide motor 3 via an encoder coupling sleeve 310. The incremental encoder 4 reads the rotation number signal of the moving slide motor 3 and feeds the signal back to the PLC controller. The PLC controller calculates the position of the moving slide based on the feedback signal to set the key shot peening positions of different crankshaft lengths 30. Based on the movement position information obtained from the incremental encoder, the PLC controller controls the frequency of the frequency converter to drive the moving slide motor 3 to stop the moving cover plate 6 for key shot peening. The self-rotating shaft motor 7 is connected to a contactor. Proximity switch sensors for the initial position and the stop position are installed at both ends of each guide rail 12. The power supply provides the working voltage for the PLC controller, relays, frequency converters, contactors, proximity switch sensors, touch screen, buttons, moving slide motor and self-rotating shaft motor respectively.

[0053] The touchscreen allows operators to set operating parameters for the shot peening device, such as the moving plate's speed, shot peening position, pause time, start shot peening position, pause position and time, and stop shot peening position. The touchscreen also provides start / stop buttons for controlling the shot peening device's operation and displaying the device's real-time status, such as the moving plate's position, the shot peening system's operating status, and the motor's speed.

[0054] The wiring of the electrical control section in this embodiment is as follows: Figure 13 As shown, the control circuit diagram of the self-rotating motor M2 is as follows: Figure 14 The diagram shows the connection methods of components including circuit breaker QFB, contactors KM1 and KM2, and thermal relays KA7 and KA8. Their connection methods, operating principles, and operating processes are all standard configurations. Further details will not be provided here.

[0055] Working principle:

[0056] Before use, connect the spray gun 5 to the shot blasting machine (not shown) via the spray pipe, connect the shot blasting machine and dust collector 26 to the PLC controller, and connect the dust collector 26 to the dust collection pipe 23. Set the shot blasting process parameters for different crankshaft numbers via the touch screen, select the crankshaft number to be shot blasted, and press the button. The PLC controller sends control commands to the frequency converter and contactor according to the shot blasting process parameters corresponding to the crankshaft number. Place the crankshaft to be shot blasted between the crankshaft support discs 17 of the adjacent rotating shaft 13. The PLC controller sends start commands to the contactor, frequency converter, and dust collector respectively. The contactor controls the rotating shaft motor 7 to start, and the chain conveyor... The rotating shaft 13 rotates, causing the crankshaft to rotate around its own axis; the frequency converter controls the start of the moving slide plate motor 3, which, through the meshing of the drive gear 311 and rack 10, drives the moving slide plate 9 to move linearly left or right along the guide rail 12. The moving slide plate 9 drives the moving cover plate 6 to move along the roller conveyor 18 to the shot peening position. During the movement, the incremental encoder 4 reads the number of rotations of the moving slide plate motor 33 and feeds the signal back to the PLC controller. The PLC controller calculates the position of the moving slide plate based on the feedback signal and adjusts the speed of the moving slide plate motor to control the moving cover plate to reach the shot peening position. At the same time, the dust collector removes dust during the shot peening process. Dust blasting operation; adjusting the spray gun angle shaft handwheel 15 drives the spray gun angle shaft 24 to rotate on the spray gun angle shaft bracket 15, changing the spray angle of the spray gun 5, so that the spray direction of the spray gun 5 is aligned with the part of the crankshaft to be shot blasted. The PLC controller controls the start of the shot blasting machine, so that the shot is sprayed out from the spray gun 5 to perform shot blasting on the crankshaft 30. At the same time, the incremental encoder 4 monitors the number of rotations of the moving slide motor 3 in real time and feeds the signal back to the PLC controller. The PLC controller calculates the position of the moving slide based on the feedback signal and adjusts the output frequency of the frequency converter to control the speed of the moving slide motor 3, so that the moving slide moves forward slowly; when the moving slide... The plate carrying the shot blasting gun reaches the crankshaft where shot blasting is required. The moving slide stops moving until the shot blasting time reaches the preset value. Then the moving slide continues to move slowly forward. When the moving slide moves forward to the proximity switch sensor at the stop position, the PLC controller controls the shot blasting machine to stop working and sends a command to the frequency converter to control the moving slide motor 3 to rotate in reverse, driving the moving slide 9 to return to the initial position along the guide rail 12, removing the moving cover plate 6. The PLC controller sends a command to control the self-rotating shaft motor 7 to stop working, stopping the rotation of the crankshaft 30. The shot-blasted crankshaft 30 is then taken out and transferred to the crankshaft-specific shot blasting machine for further processing.

Claims

1. An automatic shot peening device for crankshafts, characterized in that, Includes a movable slide bracket, shot peening chamber bracket, guide rail, slider, movable slide, rack, shot peening chamber, roller conveyor, movable cover plate, rotating shaft, rotating shaft bearing seat, protective sleeve, crankshaft support disc, spray gun angle rotating shaft, spray gun angle rotating shaft bracket, spray gun angle rotating shaft clamping device and spray gun angle rotating shaft handwheel; The shot peening chamber support and the movable slide support are arranged in parallel. The top two sides of the movable slide support are respectively provided with guide rails. The movable slide is mounted on the guide rails by a slider. A rack is provided between the two guide rails. The rack is mounted on a rack mounting beam. The two ends of the rack mounting beam are respectively mounted on the movable slide support. The shot peening chamber is mounted on a shot peening chamber support. Two roller conveyors are parallel to the guide rails and are mounted on both sides of the shot peening chamber. Multiple rotating shafts are parallel to the roller conveyors, and both ends of the rotating shafts extend out of the shot peening chamber and are mounted on rotating shaft bearing seats. The rotating shaft bearing seats are mounted on both sides of the shot peening chamber. Each rotating shaft is fitted with a protective sleeve. Two crankshaft support discs are detachably mounted on the protective sleeves. Each rotating shaft has a double sprocket mounted at both ends, and the double sprockets are connected by a chain. The two crankshaft support discs are mounted on the protective sleeves by screw and nut assemblies. One end of the movable cover plate is connected to one end of the movable slide plate, and the other end of the movable cover plate is located on the roller conveyor. Spray gun angle shaft brackets are respectively installed on both sides of the top of the movable cover plate. The two ends of the two spray gun angle shafts are respectively installed on the spray gun angle shaft brackets through bearings. A spray gun angle shaft clamping device is provided between the two spray gun angle shaft brackets. The spray gun angle shaft is clamped through the spray gun angle shaft clamping device. A ring is provided on the spray gun angle shaft. The spray gun passes through the ring and the movable cover plate and is installed at the bottom of the movable cover plate. A spray gun angle shaft handwheel is installed at one end of each spray gun angle shaft.

2. The automatic shot peening device for crankshafts according to claim 1, characterized in that, It includes a shot blasting machine and a dust collector. The shot blasting machine is connected to a shot blasting gun, and a dust collection pipe is provided on one side of the shot blasting chamber. The dust collector is connected to the dust collection pipe.

3. The automatic shot peening device for crankshafts according to claim 2, characterized in that, It also includes a PLC control system, which comprises a PLC controller, a frequency converter, contactors, relays, a touch screen, proximity switches for initial and stop positions, buttons, an incremental encoder, a moving slide motor, a spindle motor, and a power supply. The frequency converter, contactors, relays, touch screen, proximity switches for initial and stop positions, buttons, incremental encoder, shot peening machine, and dust collector are respectively connected to the PLC controller. The frequency converter and contactors are respectively connected to the relays. The moving slide motor is connected to the frequency converter. The incremental encoder is programmed... The encoder coupling sleeve is installed at the end of the rotor shaft of the mobile skateboard motor. The self-rotating shaft motor is connected to the contactor. Proximity switch sensors for the initial position and the stop position are installed at both ends of each guide rail. The mobile skateboard motor is installed on the top of the mobile skateboard, and the drive gear of the mobile skateboard motor passes through the mobile skateboard and meshes with the rack. A single sprocket is installed on the self-rotating shaft motor. The single sprocket is connected to a double sprocket on at least one self-rotating shaft through a chain. The power supply provides the working voltage for the PLC controller, relays, frequency converters, contactors, proximity switch sensors, touch screen, buttons, mobile skateboard motor, and self-rotating shaft motor.

4. The automatic shot peening device for crankshafts according to claim 1, characterized in that, The spray gun angle shaft clamping device includes a fixed bracket, a fixed clamping plate, and a movable clamping plate. The two fixed clamping plates are respectively installed on one side of the fixed bracket, and the other side of the fixed bracket is respectively provided with a pin ear. One end of each movable clamping plate is installed on the pin ear by a pin and a locking pin, and the other end of each movable clamping plate is connected to each fixed clamping plate by a screw and nut assembly. The two spray gun angle shafts are respectively clamped between the fixed clamping plate and the movable clamping plate, and the two movable clamping plates are respectively provided with arc-shaped grooves adapted to the spray gun angle shafts, and wear-resistant rubber is provided in the arc-shaped grooves.

5. The automatic shot peening device for crankshafts according to claim 1, characterized in that, The shot peening chamber includes a connecting frame, a rotating shaft support frame, a shot hopper, a hopper disc, and a hopper cylinder. The connecting frame is U-shaped. The rotating shaft support frame is installed on the top of the connecting frame. Each rotating shaft has its two ends extending out of the rotating shaft support frame and installed on a rotating shaft bearing seat. The two rotating shaft bearing seats are symmetrically installed on both sides of the connecting frame. The shot hopper is installed at the bottom of the connecting frame. The shot hopper is formed by connecting a hopper side plate and a hopper bottom plate to form an inverted trapezoid. The hopper disc is installed on the top of the hopper cylinder, and the bottom of the hopper cylinder is installed on the hopper bottom plate. The rotating shaft motor is installed on the shot peening chamber bracket.

6. The automatic shot peening device for crankshafts according to claim 1, characterized in that, The roller conveyor includes a roller frame, roller shafts, bearing sleeves, rollers, and locking rings. The roller frame is rectangular, and multiple bearing sleeves are arranged in a linear array within the roller frame. Each bearing sleeve contains a bearing. Multiple rollers are connected to roller shafts, and each roller shaft passes through a bearing and is connected to a locking ring. The top surface of the roller is 0.5 mm higher than the top surface of the self-rotating shaft support frame.

7. The automatic shot peening device for crankshafts according to claim 1, characterized in that, The distance between the two crankshaft support disks is adjusted according to the length of the crankshaft.

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