Vibration equipment for improving fatigue strength of shaft parts

Abstract

The utility model relates to the technical field of machining, in particular to vibration equipment for improving fatigue strength of shaft parts, which comprises an oil tank, a water tank, a PLC (programmable logic controller) control cabinet assembly, an outer frame and a chassis, the parts are placed in a hopper main body, grinding materials are added into the hopper main body, and a vibration mechanism is started to drive the hopper main body to vibrate. The hopper body vibrates evenly through buffering of the spring assembly, grinding materials rotate in the hopper body in one direction, the vibration motor on the side face of the hopper body enables the hopper body and the grinding materials placed in the hopper body to vibrate in the axial direction through high-frequency vibration in the axial direction (the left-right direction), and therefore the grinding materials rotate in one direction and vibrate in the left-right direction in the hopper body. Through the movement, the part and the grinding material are fully rubbed, microscopic grinding lines on the surface of the part are broken, when the roughness of the part after grinding is Ra0.4, the surface roughness of the part can reach Ra0.2-Ra0.3 after the part is vibrated and polished for one hour through the hopper body, and the effect of improving the surface roughness of the part is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a vibration device for improving the fatigue strength of shaft parts. Background Art

[0002] Traditional finishing involves clamping or placing parts in abrasives, and relying on equipment to drive the product to rotate so that the abrasives and the product surface continuously rub against each other. This can only remove surface burrs and improve the surface roughness of the product, but cannot interrupt the surface grinding lines or increase the surface compressive stress of the product. Currently, finishing equipment at home and abroad only clamps parts and rubs them against the abrasives through rotation, which can only remove burrs and improve surface roughness. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the shortcomings of the existing technology, the utility model provides a vibration device for improving the fatigue strength of shaft parts, which solves the technical problem that the existing finishing equipment can only remove burrs and improve surface roughness by clamping parts and rubbing them with abrasives through rotation.

[0005] (2) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A vibration device for improving the fatigue strength of shaft parts includes an oil tank, a water tank and a PLC control cabinet assembly, an oil pump is installed on the top surface of the oil tank, a water pump is installed on the top surface of the water tank, and the device includes an outer frame and a chassis, the chassis is fixedly connected to the bottom of the outer frame, a vibration mechanism is provided on the chassis, a grinding mechanism is provided above the vibration mechanism, a protection mechanism is provided on the top surface of the outer frame, and four water spray pipes are fixedly connected to the outer frame, the vibration mechanism includes a spring assembly, a first motor, a belt coupling, a second coupling, a bearing base and a balance block, the grinding mechanism includes a vibration motor, a hopper body and a counterweight block, and the protection mechanism includes a crank arm, an oil cylinder, a protection cover and a hinge.

[0008] Preferably: twelve spring assemblies are fixedly installed on the top surface of the chassis, the spring assemblies are divided into six groups, each group has two spring assemblies, the output end of the first motor is fixedly connected to a belt coupling, a bearing base is provided at the end of the belt coupling away from the first motor, a transmission shaft is rotatably connected in the bearing base, the transmission shaft is connected to the belt coupling, a balancing block is fixedly connected at the connection between the transmission shaft and the bearing base, a second coupling is provided on the side of the transmission shaft away from the bearing base, the number of bearing bases is three, the transmission shaft is rotatably connected to the three bearing bases, the number of balancing blocks is four, and the number of second couplings is six.

[0009] Preferably, one end of the hopper body is fixedly connected to the vibration motor, two counterweights are provided on a side of the hopper body away from the vibration motor, and abrasive is provided in the hopper body.

[0010] Preferably, the bottom surface of the hopper body is fixedly connected to the three bearing bases.

[0011] Preferably, the bottom surface of the hopper body is fixedly connected to the twelve spring assemblies, and the transmission shaft, the bearing base, the balancing block and the second coupling are all located in the middle of the six groups of spring assemblies.

[0012] Preferably, the side walls at the top of the outer frame are fixedly connected to two hinges, and the two hinges are fixedly connected to protective covers.

[0013] Preferably, the protective cover is fixedly connected to the two crank arms, the two crank arms are rotatably connected to the output ends of the two oil cylinders respectively, and a fixing seat is provided at one end of the two oil cylinders away from the crank arms, and the fixing seat is installed on the bottom surface.

[0014] Preferably, the PLC control cabinet assembly is electrically connected to the vibration motor, the first motor, the oil tank and the water tank; an oil pipe is provided between the oil tank and the oil cylinder; and a water pipe is provided between the water tank and the four water spray pipes.

[0015] (3) Beneficial effects

[0016] 1. Place the parts inside the hopper body and add abrasives inside the hopper body. When the parts are processed, first start the vibration mechanism through the PLC control cabinet assembly. The vibration mechanism drives the hopper body to vibrate, and the spring assembly is used to buffer the hopper body to make it vibrate evenly, so that the abrasive rotates in one direction inside the hopper body. The vibration motor on the side of the hopper body causes the hopper body and the abrasive placed inside to vibrate axially through high-frequency vibration in the axial direction (left and right direction). In this way, the abrasive rotates in one direction and vibrates left and right in the hopper body. Through such movement, the parts and the abrasive are fully rubbed, interrupting the microscopic grinding lines on the surface of the parts and forming irregular matte lines similar to "ice flowers" on the surface of the product. When the roughness of the parts after grinding is Ra0.4, after 1 hour of vibration finishing of the hopper body, the surface roughness of the parts can reach Ra0.2-Ra0.3, so that this application has the effect of improving the surface roughness of the parts.

[0017] 2. After the high-frequency vibration and grinding of the hopper body and the abrasive inside it, not only the surface compressive stress of the parts can be increased, but also the fatigue strength of the product can be improved, thereby increasing the service life of the product, so that this application has the effect of increasing the service life of the parts.

[0018] 3. Since irregular textures are formed on the surface of the parts after grinding, the oil storage capacity of the parts surface is improved and the lubrication effect is better, so that this application has the ability to improve the oil storage and lubrication effect of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 This is the overall structural diagram of the device of the utility model;

[0021] Figure 2 This is a structural diagram of the main body of the device of the utility model;

[0022] Figure 3 This is a structural diagram of the grinding mechanism of the present utility model;

[0023] Figure 4 This is a structural diagram of the chassis and spring assembly of the utility model;

[0024] Figure 5 This is a side structural diagram of the overall device of the present utility model.

[0025] Legend: 1. Oil tank; 2. Water tank; 3. Crank arm; 4. Oil cylinder; 5. Vibration motor; 6. Protective cover; 7. Outer frame; 8. Hinge; 9. Hopper body; 10. Counterweight; 11. Spring assembly; 12. Chassis; 13. Balance block; 14. Bearing base; 15. Water spray pipe; 16. Second coupling; 17. Belt coupling; 18. First motor; 19. PLC control cabinet assembly; 20. Drive shaft. DETAILED DESCRIPTION

[0026] The embodiments of the present application provide a vibration device for improving the fatigue strength of shaft parts, thereby effectively solving the problem that existing finishing equipment can only remove burrs and improve surface roughness by clamping parts and rubbing them against abrasives through rotation.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the existing finishing equipment can only remove burrs and improve surface roughness by clamping the parts and rotating and rubbing them with abrasives. The overall idea is as follows:

[0028] In response to the problems existing in the prior art, the utility model provides a vibration device for improving the fatigue strength of shaft parts, including an oil tank 1, a water tank 2 and a PLC control cabinet assembly 19, an oil pump is installed on the top surface of the oil tank 1, and a water pump is installed on the top surface of the water tank 2. It includes an outer frame 7 and a chassis 12, the chassis 12 is fixedly connected to the bottom of the outer frame 7, a vibration mechanism is provided on the chassis 12, a grinding mechanism is provided above the vibration mechanism, a protection mechanism is provided on the top surface of the outer frame 7, four water pipes 15 are fixedly connected to the outer frame 7, the vibration mechanism includes a spring assembly 11, a first motor 18, a belt coupling 17, a second coupling 16, a bearing base 14 and a balance block 13, the grinding mechanism includes a vibration motor 5, a hopper body 9 and a counterweight block 10, and the protection mechanism includes a crank arm 3, an oil cylinder 4, a protective cover 6 and a hinge 8.

[0029] Twelve spring assemblies 11 are fixedly installed on the top surface of the chassis 12. The spring assemblies 11 include springs and spring seats. The spring assemblies 11 are divided into six groups, and each group of spring assemblies 11 has two. The output end of the first motor 18 is fixedly connected to a belt coupling 17. A bearing base 14 is provided at the end of the belt coupling 17 away from the first motor 18. A transmission shaft 20 is rotatably connected in the bearing base 14. The transmission shaft 20 is connected to the belt coupling 17. A balancing block 13 is fixedly connected at the connection between the transmission shaft 20 and the bearing base 14. A second coupling 16 is provided on the side of the transmission shaft 20 away from the bearing base 14 of the balancing block 13. There are three bearing bases 14, and the transmission shaft 20 is rotatably connected to the three bearing bases 14. The number of balancing blocks 13 is four, and the number of second couplings 16 is six.

[0030] One end of the hopper body 9 is fixedly connected to the vibration motor 5 . Two counterweights 10 are provided on a side of the hopper body 9 away from the vibration motor 5 . Abrasive is provided in the hopper body 9 .

[0031] The bottom surface of the hopper body 9 is fixedly connected to three bearing bases 14 .

[0032] The bottom surface of the hopper body 9 is fixedly connected to the twelve spring assemblies 11 , and the transmission shaft 20 , the bearing base 14 , the balancing block 13 and the second coupling 16 are all located in the middle of the six groups of spring assemblies 11 .

[0033] The side walls at the top of the outer frame 7 are fixedly connected to two hinges 8 , and the two hinges 8 are fixedly connected to the protective cover 6 .

[0034] The protective cover 6 is fixedly connected to the two crank arms 3, and the two crank arms 3 are rotatably connected to the output ends of the two oil cylinders 4 respectively. The ends of the two oil cylinders 4 away from the crank arms 3 are both provided with fixed seats, which are installed on the bottom surface.

[0035] The PLC control cabinet assembly 19 is electrically connected to the vibration motor 5 , the first motor 18 , the oil tank 1 and the water tank 2 . An oil pipe is provided between the oil tank 1 and the oil cylinder 4 , and a water pipe is provided between the water tank 2 and the four water spray pipes 15 .

[0036] The parts are placed inside the hopper body 9, and abrasives are added to the hopper body 9. When the parts are processed, the vibration mechanism is first started through the PLC control cabinet assembly 19. The vibration mechanism drives the hopper body 9 to vibrate, and the spring component 11 is used to buffer the hopper body 9 to make it vibrate evenly, so that the abrasive rotates in one direction in the hopper body 9. The vibration motor 5 on the side of the hopper body 9 causes the hopper body 9 and the abrasive placed inside it to vibrate axially through high-frequency vibration in the axial direction (left and right direction). In this way, the abrasive rotates in one direction and vibrates left and right in the hopper body 9. Through such movement, the parts and the abrasive are fully rubbed, the microscopic grinding lines on the surface of the parts are interrupted, and irregular matte lines similar to "ice flowers" are formed on the surface of the product. When the roughness of the parts after grinding is Ra0.4, after being vibrated and polished by the hopper body 9 for 1 hour, the surface roughness of the parts can reach Ra0.2-Ra0.3, so that the present application has the effect of improving the surface roughness of the parts.

[0037] Working principle:

[0038] During processing, the first motor 18 is started to rotate through the PLC control cabinet assembly 19, driving the connected belt coupling 17, and the main shaft and the second coupling 16 and the balance block 13 are driven to rotate in the hole of the bearing base 14 through the belt coupling 17. The centrifugal force of the balance block 13 drives the bearing base 14 and the hopper body 9 to vibrate up and down at high frequency, and the spring assembly 11 is used to buffer it to make it vibrate evenly, so that the abrasive rotates in one direction in the hopper body 9, and the vibration motor 5 on the side of the hopper body 9 causes the hopper body 9 and the abrasive placed inside it to vibrate in the axial direction through high-frequency vibration in the axial direction (left and right direction). In this way, the abrasive rotates in one direction and vibrates left and right in the hopper body 9. Through such movement, the parts and the abrasive are fully rubbed, interrupting the microscopic grinding lines on the surface of the parts, and forming irregular matte lines similar to "ice flowers" on the surface of the product. When the roughness of the part product after grinding is Ra0.4, after the hopper body 9 is vibrated and polished for 1 hour, the surface roughness of the part product can reach Ra0.2-Ra0.3.

[0039] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A vibration device for improving the fatigue strength of shaft parts, comprising an oil tank (1), a water tank (2) and a PLC control cabinet assembly (19), characterized in that: The invention comprises an outer frame (7) and a chassis (12), wherein the chassis (12) is fixedly connected to the bottom of the outer frame (7), a vibration mechanism is provided on the chassis (12), a grinding mechanism is provided above the vibration mechanism, a protection mechanism is provided on the top surface of the outer frame (7), and a water spray pipe (15) is fixedly connected to the outer frame (7); The vibration mechanism includes a spring assembly (11), a first motor (18), a belt coupling (17), a second coupling (16), a bearing base (14) and a balancing block (13); The grinding mechanism includes a vibration motor (5), a hopper body (9) and a counterweight (10); The protection mechanism comprises a crank arm (3), an oil cylinder (4), a protection cover (6) and a hinge (8).

2. A vibration device for improving fatigue strength of shaft parts according to claim 1, characterized in that: Twelve spring assemblies (11) are fixedly installed on the top surface of the chassis (12); the output end of the first motor (18) is fixedly connected to a belt coupling (17); a bearing base (14) is provided at one end of the belt coupling (17) away from the first motor (18); a transmission shaft (20) is rotatably connected inside the bearing base (14); the transmission shaft (20) is connected to the belt coupling (17); a balancing block (13) is fixedly connected at the connection between the transmission shaft (20) and the bearing base (14); the transmission shaft (20) is provided with a second coupling (16); the number of the bearing bases (14) is three; the transmission shaft (20) is rotatably connected to the three bearing bases (14); the number of the balancing blocks (13) is four; and the number of the second couplings (16) is six.

3. A vibration device for improving fatigue strength of shaft parts according to claim 2, characterized in that: One end of the hopper body (9) is fixedly connected to the vibration motor (5), and two counterweights (10) are provided on the side of the hopper body (9) away from the vibration motor (5). Abrasive is provided in the hopper body (9).

4. A vibration device for improving fatigue strength of shaft parts according to claim 3, characterized in that: The bottom surface of the hopper body (9) is fixedly connected to three bearing bases (14).

5. A vibration device for improving fatigue strength of shaft parts as claimed in claim 4, characterized in that: The bottom surface of the hopper body (9) is fixedly connected to twelve spring assemblies (11), and the transmission shaft (20), bearing base (14), balance block (13) and second coupling (16) are all located in the middle of the six groups of spring assemblies (11).

6. The vibration device for improving fatigue strength of shaft parts according to claim 1, characterized in that: The side walls at the top of the outer frame (7) are fixedly connected to two hinges (8), and the two hinges (8) are fixedly connected to protective covers (6).

7. A vibration device for improving fatigue strength of shaft parts according to claim 6, characterized in that: The protective cover (6) is fixedly connected to the two crank arms (3), and the two crank arms (3) are rotatably connected to the output ends of the two oil cylinders (4) respectively. The ends of the two oil cylinders (4) away from the crank arms (3) are both provided with a fixing seat, and the fixing seat is installed on the bottom surface.

8. The vibration device for improving fatigue strength of shaft parts according to claim 7, characterized in that: The PLC control cabinet assembly (19) is electrically connected to the vibration motor (5), the first motor (18), the oil tank (1) and the water tank (2).

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