A motor shaft grinding device with defect detection function

Abstract

The present invention discloses a motor shaft grinding device with a defect detection function, which relates to the field of grinding technology. The motor shaft grinding device comprises a frame, a grinding wheel, a guide wheel and a support mechanism. The frame is provided with a guide rail, a first bracket and a second bracket. The grinding wheel is rotatably connected to the first bracket, the guide wheel is rotatably connected to the second bracket, the second bracket is slidably connected to the guide rail, and the support mechanism is tightly connected to the second bracket. The support mechanism is used to adjust the height of the workpiece. The workpiece is supported by the support mechanism and the guide wheel, and the grinding wheel is used for grinding, so that the workpiece is tightly pressed on the guide wheel by the cutting force, the axis of the guide wheel has an inclination angle relative to the axis of the grinding wheel, and the guide wheel rotates at a low speed to drive the workpiece to rotate by friction.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a motor shaft grinding device with a defect detection function. Background Art

[0002] Centerless grinder (also called centerless grinding machine) is a mechanical device used for precision machining of metal workpieces. Its working principle is to grind the workpiece in a centerless support state between the grinding wheel and the guide wheel. The grinding wheel actually performs the grinding work, and the adjusting wheel controls the rotation of the workpiece and the feed speed of the workpiece, thereby achieving a high-precision machining effect. Centerless grinders are widely used in the manufacturing industry, especially for the machining of parts that require high-precision surfaces, such as bearings, ball bearings, shaft parts, etc.

[0003] In the actual centerless grinding process, the main factors affecting the external cylindrical roundness error include the workpiece center height, guide wheel inclination, guide wheel dresser inclination, etc. The workpiece center height refers to the distance from the workpiece center to the line connecting the guide wheel and the grinding wheel center; when the workpiece center is on the line connecting the guide wheel and the grinding wheel center, the workpiece center height is a positive value, otherwise it is a negative value. The workpiece center height is the most important geometric parameter affecting the external cylindrical roundness error of centerless grinding. Its size directly affects the grinding accuracy and force conditions of the workpiece, and has a huge impact on whether the workpiece can be ground stably and reliably. Under normal circumstances, the center of the workpiece must be higher than the center line connecting the grinding wheel and the guide wheel. Therefore, controlling the workpiece center height within a suitable distance is conducive to improving the grinding effect.

[0004] The existing guide plate is directly installed on the machine tool base. When the operator adjusts the height of the guide plate, he needs to manually adjust the position and height of the guide plate repeatedly, and the adjustment amount depends entirely on experience. When the operator makes adjustments, it is not only time-consuming and laborious, but the adjustment amount cannot be quantified, the adjustment accuracy is low, and the adjustment difficulty is relatively large. Summary of the invention

[0005] The purpose of the present invention is to provide a motor shaft grinding device with a defect detection function to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: the motor shaft grinding equipment includes a frame, a grinding wheel, a guide wheel and a supporting mechanism, the frame is provided with a guide rail, a first bracket and a second bracket, the grinding wheel is rotatably connected to the first bracket, the guide wheel is rotatably connected to the second bracket, the second bracket is slidably connected to the guide rail, the supporting mechanism is fastened to the second bracket, and the supporting mechanism is used to adjust the height of the workpiece.

[0007] The workpiece to be ground in this application is a motor shaft, which is ground by centerless grinding. The frame is placed on the ground to provide support, and the workpiece to be ground is supplied to the support mechanism through the corresponding feeding mechanism. The feeding mechanism is a conventional design in the field of automation and will not be described in detail here. During centerless grinding, the center of the workpiece must be higher than the center line of the grinding wheel and the guide wheel, so that the contact points between the workpiece and the grinding wheel and the guide wheel are asymmetrical, so that some raised surfaces on the workpiece can be gradually rounded during multiple rotations. The workpiece is supported by the support mechanism and the guide wheel, and ground by the grinding wheel, so that the workpiece is tightly pressed against the guide wheel by the cutting force. The axis of the guide wheel has an inclination angle relative to the axis of the grinding wheel, and the guide wheel rotates at a low speed to drive the workpiece to rotate by friction. Due to the existence of the inclination angle, the speed V at the contact point between the guide wheel and the workpiece is oblique, which can be divided into two speed components: one causes the workpiece to rotate, and the other causes the workpiece to produce an axial feed motion.

[0008] Furthermore, the support mechanism includes a guide column, an upper slider, a lower slider, a screw rod, a detection assembly, an adjustment assembly and a transmission assembly. The guide column is fastened to the second bracket, the upper slider is slidably connected to the guide column, the lower slider is slidably connected to the upper slider, the screw rod is transmission-connected to the lower slider, the detection assembly is fastened to the upper slider, the detection assembly is used to detect the center of the workpiece, the adjustment assembly and the transmission assembly are fastened to the guide column, the adjustment assembly is connected to the detection assembly through a pipeline, the transmission assembly is connected to the adjustment assembly through a pipeline, and the transmission assembly is transmission-connected to the screw rod.

[0009] The guide column is fixed on the second bracket to provide guidance for the upper slider. The contact surface of the upper slider and the lower slider is an inclined surface with a certain angle. After the detection component detects the center position of the workpiece, it drives the transmission component to move through the adjustment component, and then drives the screw to rotate, thereby driving the lower slider to move left and right along the screw. The upper slider linked with the lower slider will move up and down along the guide column. The displacement conversion ratio can be controlled by the angle design between the upper slider and the lower slider, and the horizontal movement distance of the lower slider driven by the screw is controllable. Therefore, the lifting amount of the upper slider is controllable, that is, the support mechanism can automatically adjust the height between the center of the workpiece and the center line connecting the grinding wheel and the guide wheel according to workpieces of different diameters, thereby ensuring the grinding effect.

[0010] Furthermore, a dovetail groove is provided on the upper slider, and a guide block is provided on the lower slider, and the guide block is slidably connected to the dovetail groove.

[0011] The guide block cooperates with the dovetail groove to ensure the stability of movement between the upper slider and the lower slider.

[0012] Furthermore, an inclined surface is provided on the upper slider, and the detection component includes a support block, a T-shaped slider and a support spring. The support block is tightly connected to the upper slider, and a V-shaped surface and a movable groove are provided on the support block. The plane of the V-shaped surface close to the upper slider is parallel to the inclined surface. The T-shaped slider is slidably connected to the movable groove, and the protrusion of the T-shaped slider passes through the support block. One end of the support spring is tightly connected to the bottom end of the T-shaped slider, and the other end of the support spring is tightly connected to the inner wall of the movable groove. The movable groove is connected to the adjustment component pipeline, and hydraulic oil is filled in the movable groove.

[0013] The inclined surface on the upper slider can make the workpiece during grinding be tightly pressed against the guide wheel under the action of the cutting force, thereby ensuring stability during grinding; when the workpiece is placed on the V-shaped surface on the support block, because the workpiece is cylindrical, the V-shaped surface can play a self-centering role, thereby automatically determining the center of the workpiece, and the protrusion of the T-shaped slider is located at the center of the V-shaped surface, so that when workpieces of different diameters are placed on the support block, a standard size of workpiece is pre-set. When the workpiece of standard size is placed on the V-shaped surface, it will drive the T-shaped slider to move down along the movable groove, the support spring is compressed by force, and the adjustment component and the transmission component do not move under the standard state; if the size of the workpiece is smaller than the standard size, under the guidance of the V-shaped surface, the distance that the workpiece drives the T-shaped slider to move down along the movable groove will become longer, and the hydraulic oil in the movable groove will be pressed into the adjustment component to drive the adjustment component to move; if the size of the workpiece is larger than the standard size, the T-shaped slider moves up along the movable groove driven by the elastic force of the support spring, the relative volume of the movable groove increases, and the hydraulic oil is sucked back.

[0014] Furthermore, the adjustment component includes a shell, a first piston, an iron core, a second piston and a repelling magnet. The shell is tightly connected to the guide column, and an adjustment chamber is provided in the shell. The adjustment chamber is connected to the movable groove pipeline, the first piston is slidably connected to the adjustment chamber, the iron core is tightly connected to the first piston, the second piston is slidably connected to the adjustment chamber, the repelling magnet is tightly connected to the second piston, the repelling magnet and the iron core are arranged facing each other, a coil is wound around the adjustment chamber, the coil is connected to an external power supply, the iron core is inserted into the coil to form an electromagnet, the facing ends of the electromagnet and the repelling magnet are the same magnetic poles, a section of the chamber in the adjustment chamber close to the second piston is filled with hydraulic oil, and an adjustment spring is provided on the end of the second piston away from the coil.

[0015] Under the standard state, the iron core is inserted into the coil to form an electromagnet. According to the principle of like repels like, under the action of magnetic force, the repelling magnet maintains a certain distance from the electromagnet; when the size of the workpiece is smaller than the standard size, the distance that the T-type slider moves down along the active groove will become longer, and the hydraulic oil in the active groove will be pressed into the adjusting chamber, thereby driving the first piston and the iron core to move along the adjusting chamber toward the coil. The distance that the iron core is inserted into the coil becomes longer, and the magnetic force of the electromagnet formed increases, which will drive the second piston to move away from the iron core. The adjusting spring is compressed and the hydraulic oil in the adjusting chamber is pressed into the transmission assembly, thereby driving the transmission assembly to move; when the size of the workpiece is larger than the standard size, the T-type slider moves up along the active groove driven by the elastic force of the supporting spring, the relative volume of the active groove increases, and the hydraulic oil is sucked back, thereby driving the first piston and the iron core to move along the adjusting chamber away from the coil. The distance that the iron core is inserted into the coil becomes shorter, and the magnetic force of the electromagnet formed decreases. Under the action of the elastic force of the adjusting spring, the second piston will move toward the iron core and suck the hydraulic oil in the adjusting chamber back.

[0016] Furthermore, the transmission assembly includes a protective shell, a transmission gear, a rack and a return spring. A guide groove is provided in the protective shell. The rack is slidably connected to the guide groove. The guide groove is connected to the adjusting chamber pipeline. The transmission gear is meshed with the rack. The transmission gear is rotatably connected to the protective shell. One end of the return spring is fastened to the rack, and the other end of the return spring is fastened to the inner wall of the guide groove. The transmission gear is transmission-connected to the screw rod.

[0017] The screw rod rotates counterclockwise, the upper slider rises, the screw rod rotates clockwise, and the upper slider descends; if the size of the workpiece is smaller than the standard size, the hydraulic oil in the adjusting chamber is pressed into the guide groove under the action of the second piston, driving the rack to slide to one side along the guide groove, the return spring is compressed, the transmission gear rotates counterclockwise, and then drives the screw rod to rotate counterclockwise, the upper slider rises, and thus drives the workpiece to rise; if the size of the workpiece is larger than the standard size, the hydraulic oil in the adjusting chamber is sucked back under the action of the second piston, and under the elastic force of the return spring, drives the rack to slide to the other side along the guide groove, the transmission gear rotates clockwise, and then drives the screw rod to rotate clockwise, the upper slider descends, and thus drives the workpiece to descend; that is, it realizes the automatic adjustment of the center height of the workpiece according to workpieces of different sizes, so that the center of the workpiece is always higher than the suitable height of the center line connecting the grinding wheel and the guide wheel, thereby ensuring the grinding quality.

[0018] Furthermore, an ultrasonic flaw detector is provided on the upper slider, and a detection end of the ultrasonic flaw detector faces the workpiece.

[0019] Because the upper slider is in contact with the workpiece, the ultrasonic flaw detector on the upper slider can detect flaws in the polished workpiece, thereby performing real-time detection of defects in the workpiece.

[0020] Furthermore, the first bracket and the second bracket have built-in power equipment, and the power equipment is used to drive the grinding wheel and the guide wheel to rotate.

[0021] The power device can be a motor, etc., which is used to drive the grinding wheel and the guide wheel to rotate, thereby grinding the workpiece.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The ultrasonic flaw detector on the upper slider can detect the flaws of the polished workpiece, thereby detecting the defects of the workpiece in real time.

[0024] 2. If the size of the workpiece is smaller than the standard size, the hydraulic oil in the adjusting chamber is pressed into the guide groove under the action of the second piston, driving the rack to slide to one side along the guide groove, the reset spring is compressed, the transmission gear rotates counterclockwise, and then drives the lead screw to rotate counterclockwise, the upper slider rises, and thus drives the workpiece to rise; if the size of the workpiece is larger than the standard size, the hydraulic oil in the adjusting chamber is sucked back under the action of the second piston, and under the elastic force of the reset spring, drives the rack to slide to the other side along the guide groove, the transmission gear rotates clockwise, and then drives the lead screw to rotate clockwise, the upper slider descends, and thus drives the workpiece to descend; that is, the center height of the workpiece is automatically adjusted according to workpieces of different sizes, so that the center of the workpiece is always higher than the center line connecting the grinding wheel and the guide wheel to a suitable height, thereby ensuring the grinding quality.

[0025] 3. The ratio of displacement conversion can be controlled by designing the angle between the upper slider and the lower slider, and the horizontal movement distance of the lower slider driven by the screw is controllable, so the lifting amount of the upper slider is controllable, that is, the support mechanism can automatically adjust the height between the center of the workpiece and the center line of the grinding wheel and the guide wheel according to workpieces of different diameters, thereby ensuring the grinding effect, and replacing manual adjustment with automatic drive, thereby improving the adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the support mechanism of the present invention;

[0028] Figure 3 for Figure 2 A local enlarged view of point A;

[0029] Figure 4 It is a schematic diagram of the upper slider and the lower slider of the present invention;

[0030] Figure 5 It is a partial cross-sectional view of the present invention;

[0031] Figure 6 for Figure 5 A magnified view of the B part;

[0032] Figure 7 for Figure 5 A magnified view of the C part;

[0033] Figure 8 for Figure 5 A magnified view of the D part;

[0034] Fig. 9 It is a schematic diagram of the action of the detection component of the present invention.

[0035] In the figure: 1-frame, 11-guide rail, 12-first bracket, 13-second bracket, 2-grinding wheel, 3-guide wheel, 4-support mechanism, 41-guide column, 42-upper slider, 421-dovetail groove, 422-inclined surface, 43-lower slider, 431-guide block, 44-screw rod, 45-detection component, 451-support block, 4511-V-shaped surface, 4512-movable groove, 452-T-type slider, 453-support spring, 46-adjustment component, 461-housing, 4611-adjustment chamber, 462-first piston, 463-iron core, 464-second piston, 465-repelling magnet, 466-coil, 467-adjustment spring, 47-transmission component, 471-protective shell, 4711-guide groove, 472-transmission gear, 473-rack, 474-reset spring, 5-ultrasonic flaw detector. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example: Figure 1-Figure 9 As shown, the present invention provides a technical solution for a motor shaft grinding equipment with a defect detection function, the motor shaft grinding equipment comprises a frame 1, a grinding wheel 2, a guide wheel 3 and a support mechanism 4, the frame 1 is provided with a guide rail 11, a first bracket 12 and a second bracket 13, the grinding wheel 2 is rotatably connected to the first bracket 12, the guide wheel 3 is rotatably connected to the second bracket 13, the second bracket 13 is slidably connected to the guide rail 11, the support mechanism 4 is fastened to the second bracket 13, and the support mechanism 4 is used to adjust the height of the workpiece.

[0038] The workpiece to be ground in this application is a motor shaft, which is ground by centerless grinding. The frame 1 is placed on the ground to provide support, and the workpiece to be ground is supplied to the support mechanism 4 through the corresponding feeding mechanism. The feeding mechanism is a conventional design in the field of automation and will not be described in detail here. During centerless grinding, the center of the workpiece must be higher than the center line of the grinding wheel 2 and the guide wheel 3, so that the contact points between the workpiece and the grinding wheel 2 and the guide wheel 3 are asymmetrical, so that some raised surfaces on the workpiece can be gradually rounded in multiple rotations. The workpiece is supported by the support mechanism 4 and the guide wheel 3, and the grinding wheel 2 is used for grinding, so that the workpiece is tightly pressed on the guide wheel 3 by the cutting force, and the axis of the guide wheel 3 has an inclination angle relative to the axis of the grinding wheel 2. The guide wheel 3 rotates at a low speed and drives the workpiece to rotate by friction. Due to the existence of the inclination angle, the speed V at the contact point between the guide wheel and the workpiece is oblique, which can be divided into two speed components: one to rotate the workpiece and the other to produce axial feed motion of the workpiece.

[0039] The supporting mechanism 4 comprises a guide column 41, an upper slider 42, a lower slider 43, a screw 44, a detection assembly 45, an adjustment assembly 46 and a transmission assembly 47. The guide column 41 is fastened to the second bracket 13, the upper slider 42 is slidably connected to the guide column 41, the lower slider 43 is slidably connected to the upper slider 42, the screw 44 is transmission-connected to the lower slider 43, the detection assembly 45 is fastened to the upper slider 42, the detection assembly 45 is used to detect the center of the workpiece, the adjustment assembly 46 and the transmission assembly 47 are fastened to the guide column 41, the adjustment assembly 46 is connected to the detection assembly 45 through a pipeline, the transmission assembly 47 is connected to the adjustment assembly 46 through a pipeline, and the transmission assembly 47 is transmission-connected to the screw 44.

[0040] The guide column 41 is fixed on the second bracket 13 to provide guidance for the upper slider 42. The contact surface between the upper slider 42 and the lower slider 43 is an inclined surface with a certain angle. After detecting the center position of the workpiece, the detection component 45 drives the transmission component 47 to move through the adjustment component 46, and then drives the screw rod 44 to rotate, thereby driving the lower slider 43 to move left and right along the screw rod 44. The upper slider 42 linked with the lower slider 43 will move up and down along the guide column 41. The displacement conversion ratio can be controlled by the angle design between the upper slider 42 and the lower slider 43, and the horizontal movement distance of the lower slider 43 driven by the screw rod 44 is controllable. Therefore, the lifting amount of the upper slider 42 is controllable, that is, the support mechanism 4 can automatically adjust the height between the center of the workpiece and the center line connecting the grinding wheel 2 and the guide wheel 3 according to the workpieces of different diameters, thereby ensuring the grinding effect.

[0041] The upper slider 42 is provided with a dovetail groove 421 , and the lower slider 43 is provided with a guide block 431 , and the guide block 431 is slidably connected to the dovetail groove 421 .

[0042] The guide block 431 cooperates with the dovetail groove 421 to ensure the stability of movement between the upper slider 42 and the lower slider 43 .

[0043] An inclined surface 422 is provided on the upper slider 42, and the detection component 45 includes a support block 451, a T-shaped slider 452 and a support spring 453. The support block 451 is tightly connected to the upper slider 42, and a V-shaped surface 4511 and a movable groove 4512 are provided on the support block 451. The side plane of the V-shaped surface 4511 close to the upper slider 42 is parallel to the inclined surface 422, the T-shaped slider 452 is slidably connected to the movable groove 4512, and the protrusion of the T-shaped slider 452 passes through the support block 451, one end of the support spring 453 is tightly connected to the bottom end of the T-shaped slider 452, and the other end of the support spring 453 is tightly connected to the inner wall of the movable groove 4512, the movable groove 4512 is connected to the pipeline of the adjustment component 46, and hydraulic oil is filled in the movable groove 4512.

[0044] The inclined surface 422 on the upper slider 42 can make the workpiece during grinding be tightly pressed against the guide wheel 3 under the action of the cutting force, thereby ensuring stability during grinding; when the workpiece is placed on the V-shaped surface 4511 on the support block 451, because the workpiece is cylindrical, the V-shaped surface 4511 can play a self-centering role, thereby automatically determining the center of the workpiece, and the protrusion of the T-shaped slider 452 is located at the center of the V-shaped surface 4511. In this way, when workpieces of different diameters are placed on the support block 451, a standard size of workpiece is pre-set. When the standard size workpiece is placed on the V-shaped surface 4511, it will drive the T-shaped slider 452 When the workpiece moves downward along the movable groove 4512, the support spring 453 is compressed, and the adjustment component 46 and the transmission component 47 do not move under the standard state; if the size of the workpiece is smaller than the standard size, under the guidance of the V-shaped surface 4511, the workpiece drives the T-shaped slider 452 to move downward along the movable groove 4512. The distance will become longer, and the hydraulic oil in the movable groove 4512 will be pressed into the adjustment component 46 to drive the adjustment component 46 to move; if the size of the workpiece is larger than the standard size, the T-shaped slider 452 moves upward along the movable groove 4512 driven by the elastic force of the support spring 453, the relative volume of the movable groove 4512 increases, and the hydraulic oil is sucked back.

[0045] The adjusting assembly 46 comprises a housing 461, a first piston 462, an iron core 463, a second piston 464 and a repelling magnet 465. The housing 461 is fastened to the guide column 41. An adjusting chamber 4611 is provided in the housing 461. The adjusting chamber 4611 is connected to the movable groove 4512 by a pipeline. The first piston 462 is slidably connected to the adjusting chamber 4611. The iron core 463 is fastened to the first piston 462. The second piston 464 is slidably connected to the adjusting chamber 4611. The repelling magnet 465 is fastened to the first piston 462. The second piston 464 is slidably connected to the adjusting chamber 4611. Iron 465 is firmly connected to the second piston 464, the repelling magnet 465 and the iron core 463 are arranged opposite to each other, a coil 466 is wound around the adjusting chamber 4611, the coil 466 is connected to an external power supply, the iron core 463 is inserted into the coil 466 to form an electromagnet, and the facing ends of the electromagnet and the repelling magnet 465 are the same magnetic poles. Hydraulic oil is filled in a chamber near the second piston 464 in the adjusting chamber 4611, and an adjusting spring 467 is provided on the end of the second piston 464 away from the coil 466.

[0046] Under the standard state, the iron core 463 is inserted into the coil 466 to form an electromagnet. According to the principle of like repels like, under the action of magnetic force, the repelling magnet 465 maintains a certain distance from the electromagnet. When the size of the workpiece is smaller than the standard size, the distance that the T-shaped slider 452 moves downward along the movable groove 4512 will become longer, and the hydraulic oil in the movable groove 4512 will be pressed into the adjusting chamber 4611, thereby driving the first piston 462 and the iron core 463 to move along the adjusting chamber 4611 toward the coil 466. The distance that the iron core 463 is inserted into the coil 466 becomes longer, and the magnetic force of the formed electromagnet increases, which will drive the second piston 464 to move away from the iron core 463, and the adjusting spring 467 is compressed. The hydraulic oil in the regulating chamber 4611 is pressed into the transmission assembly 47 to drive the transmission assembly 47 to move; when the size of the workpiece is larger than the standard size, the T-shaped slider 452 moves upward along the movable groove 4512 driven by the elastic force of the support spring 453, the relative volume of the movable groove 4512 increases, and the hydraulic oil is sucked back, thereby driving the first piston 462 and the iron core 463 to move along the regulating chamber 4611 away from the coil 466, the distance between the iron core 463 inserted into the coil 466 becomes shorter, and the magnetic force of the formed electromagnet is reduced. Under the action of the elastic force of the regulating spring 467, the second piston 464 will move toward the iron core 463 to suck the hydraulic oil in the regulating chamber 4611 back.

[0047] The transmission assembly 47 includes a protective shell 471, a transmission gear 472, a rack 473 and a return spring 474. A guide groove 4711 is provided in the protective shell 471. The rack 473 is slidingly connected to the guide groove 4711. The guide groove 4711 is connected to the pipe of the adjustment chamber 4611. The transmission gear 472 is meshed with the rack 473. The transmission gear 472 is rotatably connected to the protective shell 471. One end of the return spring 474 is fastened to the rack 473, and the other end of the return spring 474 is fastened to the inner wall of the guide groove 4711. The transmission gear 472 is transmission-connected to the screw rod 44.

[0048] The screw rod 44 rotates counterclockwise, and the upper slider 42 rises. The screw rod 44 rotates clockwise, and the upper slider 42 falls. If the size of the workpiece is smaller than the standard size, the hydraulic oil in the adjusting chamber 4611 is pressed into the guide groove 4711 under the action of the second piston 464, driving the rack 473 to slide along the guide groove 4711 to one side, the return spring 474 is compressed, and the transmission gear 472 rotates counterclockwise, thereby driving the screw rod 44 to rotate counterclockwise, and the upper slider 42 rises, thereby driving the workpiece to rise. If the size of the workpiece is larger than the standard size, the hydraulic oil in the adjusting chamber 4611 is pressed into the guide groove 4711 under the action of the second piston 464, and the rack 473 slides to one side along the guide groove 4711. The return spring 474 is compressed, and the transmission gear 472 rotates counterclockwise, thereby driving the screw rod 44 to rotate counterclockwise, and the upper slider 42 rises, thereby driving the workpiece to rise. The hydraulic oil in the adjusting chamber 4611 is sucked back under the action of the second piston 464, and the rack 473 is driven to slide to the other side along the guide groove 4711 under the elastic force of the return spring 474, and the transmission gear 472 rotates clockwise, thereby driving the screw rod 44 to rotate clockwise, and the upper slider 42 descends, thereby driving the workpiece to descend; that is, the center height of the workpiece is automatically adjusted according to the workpieces of different sizes, so that the center of the workpiece is always higher than the center connection height of the grinding wheel 2 and the guide wheel 3, thereby ensuring the grinding quality.

[0049] An ultrasonic flaw detector 5 is disposed on the upper slider 42 , and a detection end of the ultrasonic flaw detector 5 faces the workpiece.

[0050] Because the upper slider 42 is in contact with the workpiece, the ultrasonic flaw detector 5 on the upper slider 42 can perform flaw detection on the polished workpiece, thereby performing real-time detection of defects in the workpiece.

[0051] The first bracket 12 and the second bracket 13 have built-in power devices, which are used to drive the grinding wheel 2 and the guide wheel 3 to rotate.

[0052] The power device can be a motor, etc., which is used to drive the grinding wheel 2 and the guide wheel 3 to rotate, so as to grind the workpiece.

[0053] Working principle of the present invention: when the size of the workpiece is smaller than the standard size, the distance that the T-shaped slider 452 moves downward along the movable groove 4512 will become longer, and the hydraulic oil in the movable groove 4512 will be pressed into the adjusting chamber 4611, thereby driving the first piston 462 and the iron core 463 to move along the adjusting chamber 4611 toward the coil 466, and the distance that the iron core 463 is inserted into the coil 466 becomes longer, and the magnetic force of the composed electromagnet increases, which will drive the second piston 464 to move away from the iron core 463, and the adjusting spring 467 is compressed, and the hydraulic oil in the adjusting chamber 4611 is pressed into the guide groove 4711, driving the rack 473 to slide to one side along the guide groove 4711, and the return spring 474 is compressed, and the transmission gear 472 rotates counterclockwise, thereby driving the lead screw 44 to rotate counterclockwise, and the upper slider 42 rises, thereby driving the workpiece upward. When the size of the workpiece is larger than the standard size, the T-shaped slider 452 moves up along the movable groove 4512 under the elastic force of the support spring 453, the relative volume of the movable groove 4512 increases, and the hydraulic oil is sucked back, thereby driving the first piston 462 and the iron core 463 to move along the adjusting chamber 4611 away from the coil 466, the distance between the iron core 463 inserted into the coil 466 becomes shorter, and the magnetic force of the composed electromagnet is reduced. Under the elastic force of the adjusting spring 467, the second piston 464 will move toward the iron core 463, sucking back the hydraulic oil in the adjusting chamber 4611, and under the elastic force of the reset spring 474, the rack 473 is driven to slide to the other side along the guide groove 4711, and the transmission gear 472 rotates clockwise, thereby driving the screw rod 44 to rotate clockwise, and the upper slider 42 descends, thereby driving the workpiece to descend.

[0054] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A motor shaft grinding device with defect detection function, characterized in that: The motor shaft grinding device comprises a frame (1), a grinding wheel (2), a guide wheel (3) and a support mechanism (4); the frame (1) is provided with a guide rail (11), a first bracket (12) and a second bracket (13); the grinding wheel (2) is rotatably connected to the first bracket (12); the guide wheel (3) is rotatably connected to the second bracket (13); the second bracket (13) is slidably connected to the guide rail (11); the support mechanism (4) is tightly connected to the second bracket (13); and the support mechanism (4) is used to adjust the height of a workpiece; The support mechanism (4) comprises a guide column (41), an upper slider (42), a lower slider (43), a screw (44), a detection assembly (45), an adjustment assembly (46) and a transmission assembly (47); the guide column (41) is fixedly connected to the second bracket (13); the upper slider (42) is slidably connected to the guide column (41); the lower slider (43) is slidably connected to the upper slider (42); the screw (44) is transmission-connected to the lower slider (43); the detection assembly (45) is fixedly connected to the upper slider (42); the detection assembly (45) is used to detect the center of a workpiece; the adjustment assembly (46) and the transmission assembly (47) are fixedly connected to the guide column (41); the adjustment assembly (46) is connected to the detection assembly (45) via a pipeline; the transmission assembly (47) is connected to the adjustment assembly (46) via a pipeline; and the transmission assembly (47) is transmission-connected to the screw (44); The upper slider (42) is provided with a dovetail groove (421), the lower slider (43) is provided with a guide block (431), and the guide block (431) is slidably connected to the dovetail groove (421); An ultrasonic flaw detector (5) is provided on the upper sliding block (42), and a detection end of the ultrasonic flaw detector (5) faces the workpiece.

2. The motor shaft grinding device with defect detection function according to claim 1 is characterized in that: The upper slider (42) is provided with an inclined surface (422), the detection assembly (45) comprises a support block (451), a T-shaped slider (452) and a support spring (453), the support block (451) is fastened to the upper slider (42), a V-shaped surface (4511) and a movable groove (4512) are provided on the support block (451), and a side plane of the V-shaped surface (4511) close to the upper slider (42) is parallel to the inclined surface (422), The T-shaped slider (452) is slidably connected to the movable groove (4512); a protruding portion of the T-shaped slider (452) penetrates the support block (451); one end of the support spring (453) is tightly connected to the bottom end of the T-shaped slider (452); the other end of the support spring (453) is tightly connected to the inner wall of the movable groove (4512); the movable groove (4512) is connected to a pipeline of the adjustment component (46); and hydraulic oil is filled in the movable groove (4512).

3. The motor shaft grinding device with defect detection function according to claim 2 is characterized in that: The regulating assembly (46) comprises a housing (461), a first piston (462), an iron core (463), a second piston (464) and a repelling magnet (465); the housing (461) is tightly connected to the guide column (41); an regulating chamber (4611) is provided in the housing (461); the regulating chamber (4611) is in communication with the movable groove (4512) via a pipeline; the first piston (462) is slidably connected to the regulating chamber (4611); the iron core (463) is tightly connected to the first piston (462); the second piston (464) is slidably connected to the regulating chamber (4611); The repelling magnet (465) is tightly connected to the second piston (464), and the repelling magnet (465) and the iron core (463) are arranged opposite to each other. A coil (466) is wound around the regulating chamber (4611), and the coil (466) is externally connected to a power source. The iron core (463) is inserted into the coil (466) to form an electromagnet. The facing ends of the electromagnet and the repelling magnet (465) are magnetic poles of the same name. A section of the regulating chamber (4611) close to the second piston (464) is filled with hydraulic oil, and an adjusting spring (467) is provided on the end of the second piston (464) away from the coil (466).

4. The motor shaft grinding device with defect detection function according to claim 3 is characterized in that: The transmission assembly (47) comprises a protective shell (471), a transmission gear (472), a rack (473) and a return spring (474); a guide groove (4711) is provided in the protective shell (471); the rack (473) is slidably connected to the guide groove (4711); the guide groove (4711) is communicated with a pipe of the adjustment chamber (4611); the transmission gear (472) is meshed with the rack (473); the transmission gear (472) is rotationally connected to the protective shell (471); one end of the return spring (474) is tightly connected to the rack (473); the other end of the return spring (474) is tightly connected to the inner wall of the guide groove (4711); and the transmission gear (472) is transmission-connected to the screw rod (44).

5. The motor shaft grinding device with defect detection function according to claim 1, characterized in that: The first bracket (12) and the second bracket (13) have built-in power equipment, and the power equipment is used to drive the grinding wheel (2) and the guide wheel (3) to rotate.

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