A polishing device for roughcast of power machinery

Abstract

The present invention discloses a polishing device for power machinery blank parts, which relates to the technical field of polishing devices. In the present invention, the bottom plate is adjusted in the slider groove, so as to adjust the distance between the two fitting rollers, so that the two fitting rollers are closely attached to the outside of the main journal or crankpin of different sizes, and the abrasive belt is closely attached to the outer surface of the main journal or crankpin. Moreover, the fitting rollers are movably installed in the adjusting bottom plate to adapt to the main journal or crankpin of different diameters and shapes, and process crankshafts of various specifications. After the distance between the fitting rollers is precisely adjusted, they can be closely attached to the outside of the main journal or crankpin. The tight attachment ensures that the abrasive belt can apply pressure evenly, thus achieving a more uniform and effective polishing effect, being able to contact the main journal or crankpin more fully, reducing the risk of excessive local pressure or uneven grinding caused by too large a gap during the polishing process, helping to protect the surface of the crankshaft, and reducing damage and defects.

Description

Technical Field

[0001] The invention relates to the technical field of polishing devices, in particular to a polishing device for a power machinery blank. Background Art

[0002] The crankshaft blank polishing device is a device specially used for surface polishing of crankshaft blanks. The polishing belt is used to remove burrs, oxide scales, machining lines and other defects on the crankshaft surface through mechanical movement to improve the surface finish and precision of the crankshaft. The polishing belt is used to directly contact the crankshaft surface for polishing. The polishing belt can be selected from different materials and particle sizes as needed to meet different polishing requirements. Through polishing, burrs, oxide scales and other defects on the crankshaft surface can be removed, making the crankshaft surface smoother and flatter, and improving the surface finish. This helps to reduce friction and wear of the crankshaft during operation and extend its service life.

[0003] The main journals or crank pins on the existing crankshafts are not on the same horizontal line, which makes it inconvenient to grind the main journals or crank pins. The polishing belt cannot evenly fit the crankshaft surface during the polishing process, resulting in over-polishing in some areas and under-polishing in some areas, which makes the crankshaft surface uneven in finish. The polishing belt cannot adjust its movement trajectory according to the diameters of the main journals and crank pins, resulting in deviations in the geometric dimensions of the polished crankshaft, such as roundness and cylindricity, which affects the accuracy and interchangeability of the crankshaft. The polishing belt cannot evenly fit the crankshaft surface during the polishing process, resulting in uneven wear of the belt, which shortens the service life of the belt. The uneven surface finish of the crankshaft and the deviation in geometric dimensions will increase the friction resistance, thereby increasing the energy consumption and wear of the engine. Summary of the invention

[0004] Aiming at the problem that the existing crankshaft has a curved shape and is inconvenient for fully automatic polishing and grinding of the crankshaft in various aspects, the present invention provides a polishing device for a power machinery blank.

[0005] In order to achieve the purpose of fully automatic fitting polishing and grinding of the main journal or crank pin of the crankshaft, the present invention is implemented through the following technical scheme: a polishing device for a power machinery blank, comprising a polishing and grinding device and a polishing and grinding cavity opened inside the polishing and grinding device, wherein an angle deflection assembly, an extrusion assembly and two polishing and grinding assemblies are installed inside the polishing and grinding device, and the angle deflection assembly and the extrusion assembly are used together to fix crankshafts of different sizes;

[0006] The two polishing and grinding components each include four laminating systems 1 and four laminating systems 2, and four sanding belts are installed on the outer surfaces of the two polishing and grinding components;

[0007] The fitting system 1 includes two adjusting hydraulic presses and a lifting plate. The two adjusting hydraulic presses are installed inside the polishing and grinding assembly. A lifting plate is commonly installed on the outer surface of the output ends of the two adjusting hydraulic presses. Two tensioning rollers are movably installed on the bottom surface of the lifting plate.

[0008] The fitting system 2 includes two slider grooves and two limiting sliders. The two slider grooves are opened inside the lifting plate. The two limiting sliders are correspondingly movably installed at the inner wall of the slider grooves. Adjusting bottom plates are installed on one end surface of the two limiting sliders. The outer surface of the adjusting bottom plates is in movable contact with the inner wall of the slider grooves. Fitting rollers are movably installed inside the two adjusting bottom plates.

[0009] The outer surfaces of the tensioning rollers and the outer surfaces of the fitting rollers are both in movable contact with the inner surface of the abrasive belt. The tensioning rollers are used to adjust one side of the abrasive belt for planar grinding. The fitting rollers are used to adjust the fitting degree of the abrasive belt fitting the surface of the crankshaft.

[0010] Further, both of the two polishing and grinding assemblies include a moving system. Two lifting systems are installed on the outer surface of the two moving systems. Two polishing and grinding systems are installed on the top surfaces of the four lifting systems. The moving system includes a hydraulic press 2 and a moving bottom plate. The moving bottom plate is installed on the inner wall of the polishing and grinding chamber. The hydraulic press 2 is installed on the top surface of the moving bottom plate. A limiting groove is opened inside the moving bottom plate. A base plate is installed on the outer surface of the output end of the hydraulic press 2. The outer surface of the base plate is in movable contact with the inner wall of the limiting groove.

[0011] Further, the lifting system includes a hydraulic press 3 and a lifting platform. The hydraulic press 3 is installed on the top surface of the base plate. The lifting platform is installed on the outer surface of the output end of the hydraulic press 3. A limiting column 2 is installed on the bottom surface of the lifting platform. The outer surface of the limiting column 2 is in movable contact with the inside of the base plate.

[0012] Further, the polishing and grinding system includes a grinding frame and a motor 2. The grinding frame is installed on the top surface of the lifting platform. The motor 2 is installed on the inner surface of the grinding frame. A rotating shaft 2 is installed on the outer surface of the output end of the motor 2. A driving transmission wheel is installed on the outer surface of the rotating shaft 2.

[0013] Further, a driving shaft is movably installed inside the grinding frame. A driven shaft is movably installed inside the grinding frame. A driven transmission wheel is installed on the outer surface of the driving shaft. A belt is commonly installed on the outer surfaces of the driving transmission wheel and the driven transmission wheel. Grooves are opened on both end surfaces of the grinding frame.

[0014] Furthermore, one end surface of the adjusting hydraulic press is fixedly connected to the outer surface of the grinding frame. The first fitting system further includes four clamping cavities and four clamping plates. The four clamping cavities are formed inside the grinding frame, and the four clamping plates are installed on the outer surface of the lifting plate. The outer surface of the clamping plate is in movable contact with the inner wall of the clamping cavity. Limit posts III are installed at the inner walls of the four clamping cavities, and the outer surface of the limit post III is in movable contact with the inside of the clamping plate.

[0015] Furthermore, the second fitting system further includes an adjusting motor and a rotating shaft III. The adjusting motor is installed at the lower part of the lifting plate, the rotating shaft III is installed on the outer surface of the output end of the adjusting motor, one end surface of the rotating shaft III extends into the inside of the lifting plate, a gear ring is installed on the outer surface of the rotating shaft III, and gear racks are installed on one end surfaces of the two limit sliders. The outer surfaces of the two gear racks are meshed with the outer surface of the gear ring.

[0016] Furthermore, the angle deflection assembly includes a motor I and a rotating shaft I. The motor I is installed on the outer surface of the polishing and grinding device, the rotating shaft I is installed on the outer surface of the output end of the motor I, a turntable is installed on one end surface of the rotating shaft I, the outer surface of the turntable is in movable contact with the inside of the polishing and grinding device, and a triangular chuck is installed on one end surface of the turntable.

[0017] Furthermore, the extrusion assembly includes a hydraulic press I and a moving plate. The hydraulic press I is installed on the outer surface of the polishing and grinding device, the moving plate is installed on the outer surface of the output end of the hydraulic press I, a connecting column is installed on one end surface of the moving plate, two limit posts I are installed on one end surface of the moving plate, the outer surfaces of the two limit posts I are in movable contact with the inside of the polishing and grinding device, and a top post is movably installed inside the connecting column.

[0018] The present invention has the following beneficial effects:

[0019] For the power mechanical blank polishing device, the adjusting base plate moves in the slider groove, thereby adjusting the distance between the two fitting rollers, so that the two fitting rollers are closely attached to the outer sides of the main journal or crankpin of different sizes, making the sand belt closely attached to the outer surface of the main journal or crankpin. Moreover, the fitting rollers are movably installed in the adjusting base plate, which can adapt to the main journal or crankpin of different diameters and shapes, and process crankshafts of various specifications. After the distance between the fitting rollers is precisely adjusted, they can be closely attached to the outer side of the main journal or crankpin. The close attachment ensures that the sand belt can apply pressure evenly, thereby achieving a more uniform and effective polishing and grinding effect, being able to contact the main journal or crankpin more fully, reducing the risk of excessive local pressure or uneven grinding caused by too large a gap during the polishing and grinding process, helping to protect the surface of the crankshaft, and reducing damage and defects.

[0020] The polishing device for the rough workpiece of the power machinery synchronously raises through the tensioning rollers installed on the bottom surface of the lifting plate, loosening the abrasive belt outside the tensioning rollers. The fitting roller moves upward, changing the movement track of the abrasive belt outside the fitting roller. The mutual cooperation between the two fitting rollers and the main journal or crankpin enables the bottom surface of the main journal or crankpin to always be in close contact with the outside of the abrasive belt, changing the movement track of the abrasive belt for polishing and grinding, ensuring that the abrasive belt can evenly apply pressure to the surface of the crankshaft during the polishing and grinding process, and helping to achieve uniform grinding of the crankshaft surface.

[0021] The polishing device for the rough workpiece of the power machinery squeezes and fixes the other end face of the crankshaft through the ejector pin, thereby fixing crankshafts of different sizes for polishing and grinding. The combined use of the fixation of the three-jaw chuck and the extrusion of the ejector pin can ensure the stability of the crankshaft during the processing, prevent the influence of the crankshaft shaking on the polishing and grinding accuracy, thereby improving the polishing and grinding accuracy of the crankpin and main journal, being able to quickly fix crankshafts of different sizes, greatly shortening the preparation time during the processing, thereby improving the overall processing efficiency, and the turntable drives the three-jaw chuck and the crankshaft to perform directional angular deflection, and the crankshaft drives the ejector pin to perform directional angular deflection.

[0022] The polishing device for the rough workpiece of the power machinery realizes the replacement of the polishing and grinding parts of the main journal or crankpin through the mutual cooperation of the angle deflection component, the extrusion component and the two polishing and grinding components, and can evenly polish and grind each surface of the crankshaft, be able to accurately control the position, height and angle of the polishing and grinding, ensure the processing quality and consistency of the crankshaft surface, help to reduce surface flaws and defects, improve the overall performance of the crankshaft, and thus adapt to the polishing and grinding of different types of crankshafts.

[0023] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the polishing and grinding device of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the polishing and grinding device of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall structure of the angle deflection component of the present invention;

[0027] Figure 4 It is a schematic diagram of the overall structure of the extrusion component of the present invention;

[0028] Figure 5 It is a schematic diagram of the internal structure of the polishing and grinding component of the present invention;

[0029] Figure 6Schematic diagram of the overall structure of the mobile system and lifting system of the present invention;

[0030] Figure 7 Schematic diagram of the overall structure of the polishing and grinding system of the present invention;

[0031] Figure 8 Schematic diagram of the internal structure of the grinding frame of the present invention;

[0032] Figure 9 Schematic diagram of the overall structure of the first laminating system of the present invention;

[0033] Figure 10 Schematic diagram of the overall structure of the first laminating system of the present invention;

[0034] Figure 11 Schematic diagram of the internal structure of the second laminating system of the present invention.

[0035] In the figure: 1. Polishing and grinding device; 2. Angle deflection assembly; 201. Motor 1; 202. Rotating shaft 1; 203. Turntable; 204. Three-jaw chuck; 3. Extrusion assembly; 301. Hydraulic press 1; 302. Moving plate; 303. Limit post 1; 304. Connecting column; 305. Jacking post; 4. Polishing and grinding assembly; 401. Mobile system; 4011. Hydraulic press 2; 4012. Mobile bottom plate; 4013. Limit groove; 4014. Base plate; 402. Lifting system; 4021. Hydraulic press 3; 4022. Lifting platform; 4023. Limit post 2; 403. Polishing and grinding system; 4031. Grinding frame; 4032. Motor 2; 4033. Rotating shaft 2; 4034. Driving sprocket; 4035. Groove; 4036. Belt; 4037. Driven sprocket; 4038. Driving shaft; 4039. Driven shaft; 404. First laminating system; 4041. Adjusting hydraulic press; 4042. Lifting plate; 4043. Limit post 3; 4044. Clamping plate; 4045. Clamping cavity; 4046. Tensioning roller; 405. Second laminating system; 4051. Adjusting motor; 4052. Rotating shaft 3; 4053. Gear ring; 4054. Rack; 4055. Slide block groove; 4056. Limit slider; 4057. Adjusting bottom plate; 4058. Laminating roller; 5. Polishing and grinding cavity; 6. Abrasive belt. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred components or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Embodiment 1:

[0038] Please refer to Figures 1-11 , the embodiment of the present invention provides a technical solution: a polishing device for a power machinery blank, including a polishing and grinding device 1 and a polishing and grinding cavity 5 opened inside the polishing and grinding device 1. An angle deflection component 2, a pressing component 3, and two polishing and grinding components 4 are installed inside the polishing and grinding device 1. The angle deflection component 2 and the pressing component 3 are jointly used to fix crankshafts of different sizes;

[0039] The two polishing and grinding components 4 include four fitting systems one 404 and four fitting systems two 405. Four abrasive belts 6 are installed on the outer surfaces of the two polishing and grinding components 4;

[0040] The fitting system one 404 includes two adjusting hydraulic presses 4041 and a lifting plate 4042. The two adjusting hydraulic presses 4041 are installed inside the polishing and grinding assembly 4. A lifting plate 4042 is commonly installed on the outer surface of the output ends of the two adjusting hydraulic presses 4041. Two tensioning rollers 4046 are movably installed on the bottom surface of the lifting plate 4042. One end surface of the adjusting hydraulic press 4041 is fixedly connected to the outer surface of the grinding frame 4031. The fitting system one 404 further includes four clamping cavities 4045 and four clamping plates 4044. The four clamping cavities 4045 are opened inside the grinding frame 4031. The four clamping plates 4044 are installed on the outer surface of the lifting plate 4042. The outer surface of the clamping plate 4044 is in movable contact with the inner wall of the clamping cavity 4045. Limiting posts three 4043 are installed on the inner walls of the four clamping cavities 4045. The outer surface of the limiting post three 4043 is in movable contact with the inside of the clamping plate 4044. The lifting plate 4042 drives the adjusting bottom plate 4057 and the fitting roller 4058 to move upward, thereby changing the movement trajectory of the abrasive belt 6 on the outer side of the fitting roller 4058. And when the hydraulic press three 4021 works, the outer surface of the abrasive belt 6 can be pressed against the outer surface of the main journal or the crank pin. Through the mutual cooperation between the two fitting rollers 4058 and the main journal or the crank pin, the bottom surface of the main journal or the crank pin is always in close contact with the outer side of the abrasive belt 6. And through the mutual cooperation of synchronization, the movement trajectory of the abrasive belt 6 for polishing and grinding is changed. The close contact between the two fitting rollers 4058 and the main journal or the crank pin ensures that the abrasive belt 6 can evenly apply pressure to the surface of the crankshaft during the polishing and grinding process, which helps to achieve uniform grinding of the crankshaft surface, avoid surface quality differences caused by uneven pressure, and helps to improve the grinding accuracy of the crankshaft surface. Synchronously changing the movement trajectory of the abrasive belt 6 for polishing and grinding can flexibly adjust the grinding path and grinding intensity according to different processing requirements and workpiece shapes, improving the surface finish and roughness of the crankshaft surface;

[0041] The fitting system two 405 includes two slider grooves 4055 and two limit sliders 4056. The two slider grooves 4055 are opened inside the lifting plate 4042. The two limit sliders 4056 are correspondingly and movably installed at the inner walls of the slider grooves 4055. One-end surfaces of the two limit sliders 4056 are both installed with adjusting bottom plates 4057. The outer surfaces of the adjusting bottom plates 4057 are in movable contact with the inner walls of the slider grooves 4055. Fitting rollers 4058 are movably installed inside the two adjusting bottom plates 4057. The fitting system two 405 further includes an adjusting motor 4051 and a rotating shaft three 4052. The adjusting motor 4051 is installed at the lower part of the lifting plate 4042. The rotating shaft three 4052 is installed on the outer surface of the output end of the adjusting motor 4051. One-end surface of the rotating shaft three 4052 extends inside the lifting plate 4042. A gear ring 4053 is installed on the outer surface of the rotating shaft three 4052. One-end surfaces of the two limit sliders 4056 are both installed with gear racks 4054. The outer surfaces of the two gear racks 4054 are meshed with the outer surface of the gear ring 4053. The outer surfaces of the tensioning roller 4046 and the fitting roller 4058 are both in movable contact with the inner surface of the abrasive belt 6. The tensioning roller 4046 is used to adjust one side of the abrasive belt 6 for planar grinding. The fitting roller 4058 is used to adjust the fitting degree of the abrasive belt 6 against the surface of the crankshaft. The distance between the two fitting rollers 4058 is adjusted so that the two fitting rollers 4058 are tightly fitted outside the main journal or crankpin of different sizes, making the abrasive belt 6 tightly fit against the outer surface of the main journal or crankpin. Moreover, the fitting roller 4058 is movably installed inside the adjusting bottom plate 4057. By adjusting the distance between the fitting rollers 4058, it can adapt to main journals or crankpins of different diameters and shapes, can process crankshafts of various specifications, improves the versatility and use efficiency of the equipment. When the distance between the fitting rollers 4058 is precisely adjusted, it can be tightly fitted outside the main journal or crankpin. The tight fitting ensures that the abrasive belt 6 can apply pressure evenly, thereby achieving a more uniform and effective polishing and grinding effect, can contact the main journal or crankpin more fully, reduces the waste of the abrasive belt 6. The fitting roller 4058 can be tightly fitted against the main journal or crankpin, reducing the risk of excessive local pressure or uneven grinding caused by too large a gap during the polishing and grinding process, helping to protect the surface of the crankshaft and reducing damage and defects. Embodiment Two:

[0042] Please refer to Figures 1-7, an embodiment of the present invention provides a technical solution: a power mechanical blank polishing device, including a polishing and grinding device 1 and a polishing and grinding chamber 5 opened inside the polishing and grinding device 1. The two polishing and grinding components 4 include a moving system 401. Two lifting systems 402 are installed on the outer surface of the two moving systems 401. Two polishing and grinding systems 403 are installed on the top surfaces of the four lifting systems 402. The moving system 401 includes a second hydraulic press 4011 and a moving bottom plate 4012. The moving bottom plate 4012 is installed on the inner wall of the polishing and grinding chamber 5. The second hydraulic press 4011 is installed on the top surface of the moving bottom plate 4012. A limiting groove 4013 is opened inside the moving bottom plate 4012. A base plate 4014 is installed on the outer surface of the output end of the second hydraulic press 4011. The outer surface of the base plate 4014 is in movable contact with the inner wall of the limiting groove 4013. The lifting system 402 includes a third hydraulic press 4021 and a lifting platform 4022. The third hydraulic press 4021 is installed on the top surface of the base plate 4014. The lifting platform 4022 is installed on the outer surface of the output end of the third hydraulic press 4021. A second limiting column 4023 is installed on the bottom surface of the lifting platform 4022. The outer surface of the second limiting column 4023 is in movable contact with the inside of the base plate 4014. The polishing and grinding system 403 includes a grinding frame 4031 and a second motor 4032. The grinding frame 4031 is installed on the top surface of the lifting platform 4022. The second motor 4032 is installed on the inner surface of the grinding frame 4031. A second rotating shaft 4033 is installed on the outer surface of the output end of the second motor 4032. A driving transmission wheel 4034 is installed on the outer surface of the second rotating shaft 4033. A driving shaft 4038 is movably installed inside the grinding frame 4031. A driven shaft 4039 is movably installed inside the grinding frame 4031. A driven transmission wheel 4037 is installed on the outer surface of the driving shaft 4038. A belt 4036 is jointly movably installed on the outer surfaces of the driving transmission wheel 4034 and the driven transmission wheel 4037. Grooves 4035 are opened on both end surfaces of the grinding frame 4031. By controlling the second hydraulic press 4011 through a controller, the second hydraulic press 4011 drives the base plate 4014 to move in the limiting groove 4013 inside the moving bottom plate 4012, and the third hydraulic press 4021 controls the height of the grinding frame 4031 and the abrasive belt 6. The two cooperate with each other to replace the polished and ground parts of the main journal or crankpin. Moreover, the two polishing and grinding components 4 cooperate with the angle deflection component 2, and can evenly polish and grind each surface of the crankshaft, accurately control the position, height and angle of polishing and grinding, ensure the machining quality and consistency of the crankshaft surface, help reduce surface flaws and defects, improve the overall performance of the crankshaft, and thus adapt to the polishing and grinding of different types of crankshafts.

[0043] The angle deflection assembly 2 includes a first motor 201 and a first rotating shaft 202. The first motor 201 is installed on the outer surface of the polishing and grinding device 1, and the first rotating shaft 202 is installed on the outer surface of the output end of the first motor 201. A turntable 203 is installed on one end surface of the first rotating shaft 202, and the outer surface of the turntable 203 is in movable contact with the inside of the polishing and grinding device 1. A triangular chuck 204 is installed on one end surface of the turntable 203. The extrusion assembly 3 includes a first hydraulic press 301 and a moving plate 302. The first hydraulic press 301 is installed on the outer surface of the polishing and grinding device 1, and the moving plate 302 is installed on the outer surface of the output end of the first hydraulic press 301. A connecting column 304 is installed on one end surface of the moving plate 302, and two first limiting columns 303 are installed on one end surface of the moving plate 302. The outer surfaces of the two first limiting columns 303 are in movable contact with the inside of the polishing and grinding device 1. A top column 305 is movably installed inside the connecting column 304, so as to fix crankshafts of different sizes for polishing and grinding. The cooperation between the fixation of the triangular chuck 204 and the extrusion of the top column 305 can ensure the stability of the crankshaft during the processing, prevent the shaking of the crankshaft from affecting the polishing and grinding accuracy, thereby improving the polishing and grinding accuracy of the crankpin and the main journal, being able to quickly fix crankshafts of different sizes, greatly shortening the preparation time during the processing, and thus improving the overall processing efficiency.

[0044] The working process of the present invention: When it is necessary to polish and grind the crankpins of different crankshafts, first fix one end surface of the crankshaft on the triangular chuck 204, and then control the first hydraulic press 301 to work through the controller. The hydraulic rod drives the moving plate 302 and the two first limiting columns 303 to push. The two first limiting columns 303 limit the moving direction of the moving plate, so that the moving plate 302 stably drives the top column 305 to extrude and fix the other end surface of the crankshaft, so as to fix crankshafts of different sizes for polishing and grinding. The cooperation between the fixation of the triangular chuck 204 and the extrusion of the top column 305 can ensure the stability of the crankshaft during the processing, prevent the shaking of the crankshaft from affecting the polishing and grinding accuracy, thereby improving the polishing and grinding accuracy of the crankpin and the main journal, being able to quickly fix crankshafts of different sizes, greatly shortening the preparation time during the processing, and thus improving the overall processing efficiency.

[0045] The motor 201 is controlled by a controller to operate. The motor 201 drives the rotating shaft 202 to rotate. The rotating shaft 202 stably drives the turntable 203 to rotate inside the polishing and grinding device 1. The turntable 203 drives the triangular chuck 204 and the crankshaft to deflect at a fixed angle. The crankshaft drives the ejector pin 305 to deflect at a fixed angle. The ejector pin 305 rotates inside the connecting column 304, thus facilitating the driving of the crankshaft to deflect at a fixed angle. By deflecting the crankshaft at a fixed angle, it ensures that all surfaces of the crankpin and the main journal above the crankshaft can be fully and evenly polished and ground, improving the overall machining quality of the crankshaft. The fixed-angle deflection enables the polishing and grinding tool to accurately align different parts of the crankpin and the main journal, reducing machining errors caused by position deviation, contributing to improving the dimensional accuracy and shape accuracy of the crankshaft. Comprehensive polishing and grinding can significantly improve the surface finish and roughness of the crankshaft, reducing surface defects and flaws, and contributing to improving the wear resistance, fatigue resistance and service life of the crankshaft.

[0046] When it is necessary to polish and grind the main journal or crankpin first, the controller controls the operation of the first motor 201 to rotate the crankshaft at a fixed angle. Then, the controller controls the operation of several third hydraulic presses 4021. The third hydraulic presses 4021 drive the lifting platform 4022 and the second limiting column 4023 to move up and down. The second limiting column 4023 moves up and down inside the base plate 4014, thereby adjusting the height of the grinding frame 4031 and the abrasive belt 6. The controller controls the operation of the adjusting hydraulic press 4041. The adjusting hydraulic press 4041 drives the lifting plate 4042 and the four clamping plates 4044 to move up and down. The outer surface of the clamping plate 4044 is in movable contact with the inner wall of the clamping cavity 4045, and the inside of the clamping plate 4044 is in movable contact with the outer surface of the third limiting column 4043, so that the lifting plate 4042 moves up and down stably. When the lifting plate 4042 moves upward, the tensioning roller 4046 installed on the bottom surface of the lifting plate 4042 rises synchronously, loosening the abrasive belt 6 on the outer side of the tensioning roller 4046. Moreover, the lifting plate 4042 drives the adjusting bottom plate 4057 and the fitting roller 4058 to move upward, thereby changing the movement trajectory of the abrasive belt 6 on the outer side of the fitting roller 4058. When the third hydraulic press 4021 operates, the outer surface of the abrasive belt 6 can be pressed against the outer surface of the main journal or crankpin. Through the mutual cooperation between the two fitting rollers 4058 and the main journal or crankpin, the bottom surface of the main journal or crankpin is always in close contact with the outer side of the abrasive belt 6. And through the mutual cooperation of synchronization, the movement trajectory of the abrasive belt 6 for polishing and grinding is changed. The close contact between the two fitting rollers 4058 and the main journal or crankpin ensures that the abrasive belt 6 can evenly apply pressure to the surface of the crankshaft during the polishing and grinding process, which helps to achieve uniform grinding of the crankshaft surface, avoid surface quality differences caused by uneven pressure, and helps to improve the grinding accuracy of the crankshaft surface. Synchronously changing the movement trajectory of the abrasive belt 6 for polishing and grinding can flexibly adjust the grinding path and grinding intensity according to different processing requirements and workpiece shapes, improving the surface finish and roughness of the crankshaft surface.

[0047] Moreover, the controller controls the regulating motor 4051 to operate. The regulating motor 4051 drives the third rotating shaft 4052 to perform a rotating motion. The third rotating shaft 4052 drives the gear ring 4053 to perform a rotating motion. The outer surface of the gear ring 4053 meshes with the outer surfaces of the two gear racks 4054. The gear ring 4053 drives the two gear racks 4054 to move towards each other. The two gear racks 4054 correspondingly drive the limit sliders 4056 to move within the slider grooves 4055. The two limit sliders 4056 correspondingly drive the regulating bottom plate 4057 to stably move within the slider grooves 4055, thereby adjusting the distance between the two fitting rollers 4058, enabling the two fitting rollers 4058 to closely fit on the outer sides of the main journal or crankpin of different sizes, causing the abrasive belt 6 to closely fit on the outer surface of the main journal or crankpin. Moreover, the fitting rollers 4058 are movably installed within the regulating bottom plate 4057. By adjusting the distance between the fitting rollers 4058, it can adapt to the main journal or crankpin of different diameters and shapes, can process crankshafts of various specifications, improving the versatility and usage efficiency of the equipment. When the distance between the fitting rollers 4058 is precisely adjusted, it can closely fit on the outer side of the main journal or crankpin. The tight fit ensures that the abrasive belt 6 can apply pressure evenly, thereby achieving a more uniform and effective polishing and grinding effect, being able to contact the main journal or crankpin more fully, reducing the waste of the abrasive belt 6. The fitting rollers 4058 can closely fit the main journal or crankpin, reducing the risk of excessive local pressure or uneven grinding caused by too large a gap during the polishing and grinding process, helping to protect the surface of the crankshaft, reducing damage and defects.

[0048] The controller controls the second motor 4032 to operate. The second motor 4032 drives the second rotating shaft 4033 to perform a rotating motion. The second rotating shaft 4033 drives the driving transmission wheel 4034 to perform a rotating motion. The driving transmission wheel 4034 drives the driven transmission wheel 4037 to perform a rotating motion through the belt 4036. The driven transmission wheel 4037 drives the driving shaft 4038 to perform a rotating motion. The driving shaft 4038 thereby drives the abrasive belt 6 to perform a rotating motion. The controller controls the second hydraulic press 4011. The second hydraulic press 4011 drives the base plate 4014 to move within the limit groove 4013 of the moving bottom plate 4012, and controls the height of the grinding frame 4031 and the abrasive belt 6 together with the third hydraulic press 4021. The two cooperate with each other to replace the polishing and grinding area of the main journal or crankpin. Moreover, the two sets of polishing and grinding assemblies 4 cooperate with the angle deflection assembly 2, and can evenly polish and grind each surface of the crankshaft, being able to precisely control the position, height, and angle of the polishing and grinding, ensuring the machining quality and consistency of the crankshaft surface, helping to reduce surface flaws and defects, improving the overall performance of the crankshaft, and thus adapting to the polishing and grinding of different types of crankshafts.

[0049] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0050] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A polishing device for power machinery blanks, comprising a polishing and grinding device and a polishing and grinding cavity opened inside the polishing and grinding device, characterized in that: The polishing and grinding device includes an angle deflection component, a pressing component, and two polishing and grinding components. The angle deflection component and the pressing component are jointly used to fix crankshafts of different sizes; Both of the two polishing and grinding components include four fitting systems I and four fitting systems II. Four abrasive belts are installed on the outer surfaces of the two polishing and grinding components. Both of the two polishing and grinding components also include a moving system. Two lifting systems are installed on the outer surfaces of the two moving systems. Two polishing and grinding systems are installed on the top surfaces of the four lifting systems. The lifting system includes a hydraulic press III and a lifting platform. The polishing and grinding system includes a grinding frame and a motor II. The grinding frame is installed on the top surface of the lifting platform. The motor II is installed on the inner surface of the grinding frame. A rotating shaft II is installed on the outer surface of the output end of the motor II. A driving transmission wheel is installed on the outer surface of the rotating shaft II; The fitting system I includes two adjusting hydraulic presses and a lifting plate. The two adjusting hydraulic presses are installed inside the polishing and grinding component. A lifting plate is jointly installed on the outer surfaces of the output ends of the two adjusting hydraulic presses. Two tensioning rollers are movably installed on the bottom surface of the lifting plate. One surface of the adjusting hydraulic press is fixedly connected to the outer surface of the grinding frame. The fitting system I also includes four clamping cavities and four clamping plates. The four clamping cavities are opened inside the grinding frame. The four clamping plates are installed on the outer surface of the lifting plate. The outer surface of the clamping plate is in movable contact with the inner wall of the clamping cavity. Three limiting posts are installed on the inner wall of each of the four clamping cavities. The outer surface of the three limiting posts is in movable contact with the inside of the clamping plate; The fitting system II includes two slider grooves and two limiting sliders. The two slider grooves are opened inside the lifting plate. The two limiting sliders are correspondingly and movably installed on the inner walls of the slider grooves. An adjusting bottom plate is installed on one surface of each of the two limiting sliders. The outer surface of the adjusting bottom plate is in movable contact with the inner wall of the slider groove. A fitting roller is movably installed inside each of the two adjusting bottom plates. The fitting system II also includes an adjusting motor and a rotating shaft III. The adjusting motor is installed at the lower part of the lifting plate. The rotating shaft III is installed on the outer surface of the output end of the adjusting motor. One surface of the rotating shaft III extends into the inside of the lifting plate. A gear ring is installed on the outer surface of the rotating shaft III. A gear bar is installed on one surface of each of the two limiting sliders. The outer surfaces of the two gear bars are meshed with the outer surface of the gear ring; The outer surfaces of the tensioning roller and the fitting roller are both in movable contact with the inner surface of the abrasive belt. The tensioning roller is used to adjust one side of the abrasive belt for planar grinding. The fitting roller is used to adjust the fitting degree of the abrasive belt to the surface of the crankshaft.

2. The power machinery blank polishing device according to claim 1, wherein: The moving system includes a hydraulic press II and a moving bottom plate. The moving bottom plate is installed on the inner wall of the polishing and grinding cavity. The hydraulic press II is installed on the top surface of the moving bottom plate. A limiting groove is opened inside the moving bottom plate. A base plate is installed on the outer surface of the output end of the hydraulic press II. The outer surface of the base plate is in movable contact with the inner wall of the limiting groove.

3. The power mechanical blank polishing device according to claim 2, characterized in that: The hydraulic press three is installed on the top surface of the base plate. The lifting platform is installed on the outer surface of the output end of the hydraulic press three. A second limiting column is installed on the bottom surface of the lifting platform, and the outer surface of the second limiting column is in movable contact with the inside of the base plate.

4. The power mechanical blank polishing device according to claim 3, wherein: A driving shaft is movably installed inside the grinding frame. A driven shaft is movably installed inside the grinding frame. A driven transmission wheel is installed on the outer surface of the driving shaft. A belt is jointly and movably installed on the outer surfaces of the driving transmission wheel and the driven transmission wheel. Grooves are formed on both end surfaces of the grinding frame.

5. The power mechanical blank polishing device according to claim 1, wherein: The angle deflection assembly includes a first motor and a first rotating shaft. The first motor is installed on the outer surface of the polishing and grinding device. The first rotating shaft is installed on the outer surface of the output end of the first motor. A turntable is installed on one end surface of the first rotating shaft. The outer surface of the turntable is in movable contact with the inside of the polishing and grinding device. A triangular chuck is installed on one end surface of the turntable.

6. The power mechanical blank polishing device according to claim 1, characterized in that: The extrusion assembly includes a first hydraulic press and a moving plate. The first hydraulic press is installed on the outer surface of the polishing and grinding device. The moving plate is installed on the outer surface of the output end of the first hydraulic press. A connecting column is installed on one end surface of the moving plate. Two first limiting columns are installed on one end surface of the moving plate. The outer surfaces of the two first limiting columns are in movable contact with the inside of the polishing and grinding device. A top column is movably installed inside the connecting column.

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