A light ball machine for roundness grinding of finished steel ball

Abstract

The present application belongs to the field of grinding processing equipment, and proposes a light ball machine for finished steel ball roundness grinding processing, which comprises a machine body, a steel ball chute, a grinding disc system, a pressurizing system and a transmission system. The grinding disc system comprises a lower grinding disc and an upper grinding disc. The lower grinding disc comprises a plurality of lower grinding rings arranged concentrically, and the top surface of the lower grinding ring is provided with a lower groove. The bottom of the lower grinding disc is provided with a rotating disc. The upper grinding disc comprises a plurality of upper grinding rings arranged concentrically, and the bottom surface of the upper grinding ring is provided with an upper groove corresponding to the lower groove. The top of the upper grinding disc is provided with a pressurizing disc connected with the pressurizing system. The pressurizing disc is provided with a detection port near the ball outlet. The detection port is provided with an online balance detection device. The online balance detection device comprises a plurality of detectors dynamically contacting the back surface of the upper grinding ring. The present application has the advantages of reasonable design, good consistency of processing roundness, favorable finished product rate, low equipment cost, high comprehensive utilization rate and suitability for large-scale promotion.

Description

Technical Field

[0001] This invention belongs to the field of grinding equipment, and particularly relates to a polishing machine for grinding the roundness of finished steel balls. Background Technology

[0002] Grinding bearing steel balls is one of the core processes in bearing manufacturing. Its purpose is to achieve extremely high dimensional accuracy, roundness, surface roughness, and geometric consistency in the steel balls, thereby ensuring the bearing's rotational accuracy, lifespan, and reliability. In the roundness grinding process, a double-disc polishing machine is generally used to treat the surface of the steel balls.

[0003] Existing ball milling machines focus on the principle of frictional cutting through the rotation and revolution of steel balls. They mainly consist of a main frame, grinding disc system, transmission system, pressurization system, lubrication and cooling system, and control system. The grinding disc system includes a lower grinding disc and an upper grinding disc; the lower disc is the driving disc, and the upper disc is the pressure disc. Since most grinding disc systems only groove the lower disc while leaving the upper disc flat, although the grinding objective is achieved, the roundness consistency needs improvement. Secondly, grinding discs that have been in use for a certain period will experience varying degrees of reduced self-sharpening on their surface. Besides periodic re-grinding (e.g., every 900-2000 hours), problems are often difficult to detect promptly, leading to delayed discovery, reduced yield, and a necessary extension of the processing cycle. Furthermore, it is sometimes necessary to re-groove the grinding disc. Once re-grooved, all grooves need to be treated; otherwise, the roundness of the final steel balls will vary significantly, making re-grooving costly. Summary of the Invention

[0004] This invention addresses the technical problems existing in the aforementioned ball milling machines by proposing a ball milling machine for grinding the roundness of finished steel balls that is rationally designed, has good consistency in roundness, helps ensure yield, reduces equipment costs, and has a high overall utilization rate.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A ball grinding machine for grinding the roundness of finished steel balls is provided, comprising a machine body, a steel ball chute on the machine body, a grinding disc system on the inner side of the steel ball chute, a pressure system and a transmission system respectively arranged above and below the grinding disc system, the grinding disc system including a lower grinding disc and an upper grinding disc, the lower grinding disc including multiple concentrically arranged lower grinding rings, the top surface of the lower grinding rings having a lower groove, and a turntable at the bottom of the lower grinding disc, the upper grinding disc including multiple concentrically arranged upper grinding rings, the bottom surface of the upper grinding rings having an upper groove corresponding to the lower groove, a pressure plate connected to the pressure system at the top of the upper grinding disc, the pressure plate having a ball inlet and a ball outlet, a detection port near the ball outlet on the pressure plate, and an online balance detection device at the detection port, the online balance detection device including multiple detectors dynamically contacting and cooperating with the back of the upper grinding rings.

[0006] Preferably, the lower grinding ring has at least three radially distributed threading holes on its ring surface. Each threading hole has a threading plate that radially connects to adjacent lower grinding rings. The threading plate has connecting bolts connecting the lower grinding disc and the turntable near its two ends. The turntable has a positioning groove that mates with the lower grinding ring.

[0007] Preferably, the bottom surfaces of the innermost and outermost lower grinding rings among the multiple lower grinding rings are provided with a threading groove that corresponds radially to the threading hole. The connecting bolt includes a stud that is fixedly connected to the threading groove. The threading plate is provided with a connecting hole that mates with the stud. A lock nut is provided at the bottom of the stud.

[0008] Preferably, the online balance detection device includes a mounting base, on the side of which are provided support feet and positioning bolts for connection to the pressure plate. The detectors are divided into three groups and radially distributed below the mounting base with the center of the pressure plate as the center. On the side of the mounting base away from the pressure plate, there are three light emitters corresponding to the three groups of detectors. On the side of the mounting base near the pressure plate, there is a convex lens. On the side of the convex lens facing away from the mounting base, there is a receiver. The convex lens is used to refract the light emitted by the light emitters to the receiver. The detector includes a through hole corresponding to the light path emitted by the light emitter.

[0009] Preferably, in the three groups of detectors, every three detectors correspond to one upper grinding ring, and the circle containing the three detectors is concentric with the pressure plate.

[0010] Preferably, the detector includes a light-shielding plate, a detection head is provided at the bottom of the light-shielding plate, a floating rod is provided at the top of the light-shielding plate, a locking head is provided at the top of the floating rod, the locking head cooperates with a mounting hole provided inside the mounting base, and a floating spring is provided on the outside of the floating rod to cooperate with it.

[0011] Preferably, the receiver includes a side plate with a horizontal bar on it, and an imaging plate is provided at the end of the horizontal bar facing the convex lens.

[0012] Preferably, the light emitter is mounted on a crescent plate, the side of the crescent plate is provided with a mounting joint, the top of the crescent plate is provided with a first connecting plate, the first connecting plate mates with a first connecting port provided inside the mounting base, and the mounting base is provided with a first screw connecting the first connecting plate and the first connecting port.

[0013] Preferably, the top of the convex lens is provided with a second connecting plate, which cooperates with a second connecting port provided inside the mounting base, and the mounting base is provided with a second screw connecting the second connecting plate and the second connecting port.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] This invention provides a ball-grinding machine for grinding the roundness of finished steel balls. The upper and lower grinding discs are respectively equipped with upper and lower grooves, which helps improve the roundness consistency of the ground steel balls. The upper and lower grinding discs employ a lower and upper grinding ring design, facilitating the replacement and grooving of individual rings, thus improving the overall utilization rate of the equipment and reducing workshop costs. An online balancing detection device allows for online monitoring of the working conditions of the upper and lower grinding discs, enabling timely identification of problems and adjustment of the grinding disc system, thereby reducing the scrap rate. This invention features a reasonable design, good roundness consistency, ensures high yield, reduces equipment costs, and has a high overall utilization rate, making it suitable for large-scale promotion. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a ball milling machine used for grinding the roundness of finished steel balls;

[0018] Figure 2 This is a front view of a ball milling machine used for grinding the roundness of finished steel balls;

[0019] Figure 3 for Figure 2 A cross-sectional view along the HH direction of a ball milling machine used for grinding the roundness of finished steel balls;

[0020] Figure 4 A top view of a ball milling machine for grinding the roundness of finished steel balls;

[0021] Figure 5 A three-dimensional view of the grinding disc system;

[0022] Figure 6 This is an exploded view of the grinding disc system;

[0023] Figure 7 This is an exploded view of the lower millstone;

[0024] Figure 8 This is a bottom view of the lower grinding disc;

[0025] Figure 9 An exploded view of the online balance detection device;

[0026] Figure 10 This is a bottom view of the online balance detection device;

[0027] Figure 11 A three-dimensional view of the detector;

[0028] In the above figures:

[0029] 1. Machine body; 2. Steel ball chute; 3. Grinding disc system; 31. Lower grinding disc; 311. Lower grinding ring; 312. Lower groove; 313. Belt threading hole; 314. Belt threading groove; 32. Upper grinding disc; 321. Upper grinding ring; 322. Upper groove; 33. Turntable; 331. Positioning groove; 34. Pressure plate; 341. Ball inlet; 342. Ball outlet; 343. Detection port; 35. Belt threading plate; 36. Connecting bolt; 361. Stud; 362. Locking nut; 4. Pressurization system; 5. Transmission system; 6. Online balance detection device; 1. Detector; 611. Through hole; 612. Light shield; 613. Detector head; 614. Floating rod; 615. Clip; 616. Floating spring; 62. Mounting base; 621. First connection port; 622. Second connection port; 623. Mounting hole; 63. Support foot; 64. Positioning bolt; 65. Light emitter; 66. Convex lens; 661. Second connecting plate; 67. Receiver; 671. Side plate; 672. Horizontal rod; 673. Imaging plate; 68. Crescent plate; 681. Mounting connector; 682. First connecting plate. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0031] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0032] Examples, such as Figures 1-11 As shown, the present invention provides a ball grinding machine for grinding the roundness of finished steel balls, comprising a machine body 1, a steel ball chute 2 provided on the machine body 1, a grinding disc system 3 provided on the inner side of the steel ball chute 2, a pressure system 4 and a transmission system 5 respectively provided above and below the grinding disc system 3, and the grinding disc system 3 including a lower grinding disc 31 and an upper grinding disc 32. The upper grinding disc 32 is a fixed disc, and the lower grinding disc 31 is a driving disc, which is connected to the transmission system 5, and the transmission system 5 inputs power to the driving disc. The middle of the pressure system 4 is a fixed shaft that passes through the grinding disc system 3. The upper half of the fixed shaft is provided with a lead screw thread. Above the grinding disc system 3, a lead screw thread sleeve that is adjustable in height with the fixed shaft is provided. The lead screw thread sleeve is rotatably engaged with the top of the grinding disc system 3. The relative distance between the top of the grinding disc system 3 and the top of the pressure system 4 can be adjusted by adjusting the lead screw thread sleeve. This controls the grinding surface gap of the grinding disc system 3. The steel ball workpiece falls from the upper station into the steel ball chute 2, moves from the chute 2 towards the ball inlet 341, and the ground steel ball overflows from the ball outlet 342. A coolant / grinding fluid system (as in the prior art) is provided above the grinding disc system 3 to supply coolant / grinding fluid to the ball inlet 341 during grinding. A coolant / grinding fluid recovery tank is provided at the bottom of the machine body 1 for centralized processing and reuse. Based on this, to improve the grinding efficiency of bearing steel ball workpieces, this invention proposes improvements to the grinding disc system 3 and provides an online detection function for the new system, facilitating timely maintenance and reducing the scrap rate.

[0033] Specifically, the lower grinding disc 31 provided by the present invention includes a plurality of concentrically arranged lower grinding rings 311, the top surface of the lower grinding rings 311 is provided with a lower groove 312, the bottom of the lower grinding disc 31 is provided with a turntable 33, the upper grinding disc 32 includes a plurality of concentrically arranged upper grinding rings 321, the bottom surface of the upper grinding rings 321 is provided with an upper groove 322 corresponding to the lower groove 312, the top of the upper grinding disc 32 is provided with a pressure plate 34 connected to the pressure system 4, the pressure plate 34 is provided with an inlet 341 and an outlet 342, the pressure plate 34 is provided with a detection port 343 near the outlet 342, the detection port 343 is provided with an online balance detection device 6, the online balance detection device 6 includes a plurality of detectors 61 that dynamically contact and cooperate with the back of the upper grinding rings 321.

[0034] In this invention, the turntable 33 serves two purposes: firstly, it mounts the lower grinding disc 31, providing a stable mounting surface for the lower grinding disc 31; secondly, it connects to the transmission system 5. For example, a hollow bushing is provided at the center of the turntable 33, and a reduction gear ring system is provided outside the hollow bushing. The reduction gear system is a partial structure of the transmission system 5, thereby ensuring that the turntable 33 and the lower grinding disc 31 can rotate synchronously and continuously. The upper grinding disc 32 has an upper groove 322, the center trajectory of which is C-shaped. The opening of the C-shape is connected to the ball inlet 341 and the ball outlet 34. The ball inlet 341 and the ball outlet 342 are separated to ensure that the steel ball can effectively enter the steel ball chute 2 from the ball outlet 342 after completing one round of grinding. The lower grinding disc 31 has a lower groove 312. One lower groove 312 and one upper groove 322 correspond to form a grinding path. The steel ball entering the upper groove 322 and the lower groove 312 from the ball inlet 341 completes one round of grinding with the rotation of the lower grinding disc 31. This helps to improve the roundness consistency of the ground steel ball, improve grinding efficiency, and shorten the grinding cycle.

[0035] Furthermore, the upper grinding disc 32 provided by the present invention adopts a concentric upper grinding ring 321 design, and the lower grinding ring 311 adopts a concentric lower grinding ring 311 design, which facilitates the replacement and grooving of individual rings, reduces workshop costs, and helps improve the overall utilization rate of the equipment. Matching the grinding disc system 3 with the concentric ring design, the online balance detection device 6 provided by the present invention can perform online detection of the working conditions of the upper grinding disc 32 and the lower grinding disc 31, which helps to promptly determine the location of the problem and adjust the grinding disc system 3, avoiding the situation where the scrap rate increases sharply due to delayed detection. Targeted replacement and repair of the problematic locations helps to improve the overall utilization rate of the equipment.

[0036] To improve the uniformity of movement of all lower grinding rings 311, the lower grinding ring 311 provided by the present invention has at least three radially distributed threading holes 313 on its ring surface. Threading plates 35 are provided in the threading holes 313 to connect adjacent lower grinding rings 311 radially. The threading plates 35 are provided with connecting bolts 36 connecting the lower grinding disc 31 and the turntable 33 near their two ends. The turntable 33 is provided with positioning grooves 331 that cooperate with the lower grinding rings 311. The threading hole 313 is a rectangular hole, and the threading plate 35 is a profile that fits the rectangular hole surface to surface. The threading plate 35 radially penetrates all the lower grinding rings 311 and is distributed radially to achieve uniform force distribution. The radial connection of the threading plate 35 can prevent circumferential displacement and staggered floating of adjacent lower grinding rings 311. At the same time, the annular part formed by the other lower grinding rings 311 except for the innermost and outermost rings fits with the positioning groove 331. The positioning groove 331 is used to ensure the concentricity of rotation of all lower grinding rings 311, which is beneficial to ensuring the grinding quality of the steel ball and preventing the steel ball from being impacted and eroded between adjacent lower grinding rings 311. In addition, the fixing effect of the connecting bolts 36 can effectively ensure the assembly reliability of all lower grinding rings 311, so that the lower grinding disc 31 and the turntable 33 have high rotational synchronization, which is beneficial to improving the continuous grinding operation efficiency of this equipment.

[0037] Similar to the lower grinding disc 31, the upper grinding ring 321 provided by the present invention has at least three radially distributed threading holes 313 on its annular surface. Threading plates 35 are radially connected to adjacent upper grinding rings 321 within the threading holes 313. Bolts connecting the upper grinding disc 32 and the pressure plate 34 are provided near both ends of the threading plates 35. The tops of the bolts extend to the upper outer side of the pressure plate 34, and the bottom surface of the pressure plate 34 has an annular groove that mates with the upper grinding rings 321. All the upper grinding rings 321 can be mounted on the bottom of the pressure plate 34 through the connection of the threading plates and bolts, facilitating the adjustment of the height of the pressure plate 34 by the pressure system 4. Furthermore, the bottom surfaces of the upper grinding rings 321 can be kept at the same level, effectively ensuring the concentricity of the upper grooves 322. While ensuring a reasonable grinding amount, the threading plates maintain a small loose fit clearance with the upper grinding rings to provide a small safety float clearance. The correspondence between the upper grinding disc 32 and the lower grinding disc 31 can form a stable, reliable and complete grinding path to ensure the roundness consistency of the processed bearing steel balls.

[0038] Since the thickness of the lower grinding disc 31 is limited and the gap between adjacent lower grooves 312 should not be too large, in order to provide a reliable connection with the turntable 33 and not damage the grinding surface integrity of the lower groove 312, the bottom surfaces of the innermost and outermost lower grinding rings 311 provided by the present invention are provided with a belt groove 314 that corresponds radially to the belt hole 313. The connecting bolt 36 includes a stud 361 that is fixedly connected to the belt groove 314. The belt plate 35 is provided with a connecting hole that mates with the stud 361. A locking nut 362 is provided at the bottom of the stud 361. In this way, the threading groove 314 provides sufficient radial threading path for the threading plate 35, and the two radially aligned studs 361 serve as positioning elements for the threading plate 35. The innermost and outermost lower grinding rings 311 press down on the turntable 33 from top to bottom. The studs 361 are concealed and welded to the bottom of the lower grinding rings 311, with the top not protruding and the bottom protruding through the turntable 33. They are fixed by locking nuts 362, thus achieving a concealed fixed connection. This ensures the assembly reliability of the lower grinding rings 311, the threading plate 35, and the turntable 33, as well as the integrity of the grinding surface of the lower groove, which is beneficial to ensuring the grinding quality.

[0039] To improve the online detection performance of the grinding disc system 3, the online balancing detection device 6 provided by the present invention can detect the real-time operating conditions of the lower grinding disc 31 and the upper grinding disc 32. Specifically, the online balancing detection device 6 includes a mounting base 62, on the side of which are provided support feet 63 and positioning bolts 64 connected to the pressure plate 34. Detectors 61 are divided into three groups and radially distributed below the mounting base 62 with the center of the pressure plate 34 as the center. On the side of the mounting base 62 away from the pressure plate 34, there are three light emitters 65 corresponding one-to-one with the three groups of detectors 61. On the side of the mounting base 62 near the pressure plate 34, there is a convex lens 66. On the side of the convex lens 66 facing away from the mounting base 62, there is a receiver 67. The convex lens 66 is used to refract the light emitted by the light emitter 65 to the receiver 67. The detector 61 includes a through hole 611 corresponding to the light path emitted by the light emitter 65. The support foot 63 is a hollow tube welded to the upper grinding disc 32, providing a support node for the mounting base 62. The mounting base 62 is fixed to the horizontal support provided by the support foot 63 using positioning bolts 64. The mounting base 62 has a hollow structure, mainly consisting of irregularly shaped holes spaced apart from the three sets of detectors 61. These irregularly shaped holes allow the interaction between the light and the detectors 61 to be displayed in an open environment, facilitating workers or intelligent acquisition equipment to obtain the detection status of the detectors 61. Furthermore, each set of detectors 61 contains at least n-2 pairs of grooves, mainly corresponding to the other upper grinding rings 321 except for the outermost and innermost ones. The three light emitters 65 simultaneously emit three sets of light to the three sets of detectors 61. Without interference, the three sets of light can effectively pass through the through holes 611 of the corresponding sets of detectors 61 and be refracted by the convex lens 66 to the same position on the receiver 67. The endpoint of the light is a circular range to provide a margin of error.

[0040] Furthermore, if the actual aperture of the light on the receiver 67 deviates from the target circle on the receiver 67 and changes continuously, then the problem with the lower grinding disc 31 is used to determine the direction; if the light on the receiver 67 is a holographic design spot, then the problem with the upper grinding disc 32 is used to determine the direction; by using 3 sets of detection light, the accuracy of direction determination can be improved.

[0041] In the three sets of detectors 61 provided by this invention, every three detectors 61 correspond to one upper grinding ring 321, and the circle containing the three detectors 61 is concentric with the pressure plate 34. Three rigid points define a circle, and the concentricity of this circle with the pressure plate 34 ensures that the direction of the light rays' impact points points towards the axis of the pressure plate 34. Since the imaging position provided by the receiver 67 is on the outer periphery of the pressure plate 34, a convex lens 66 with a spindle-shaped cross-section can be used to ensure that the three light spots on the same circle fall on the same target point. This triple impact ensures that the brightness of the target point meets the requirements for naked-eye observation. Furthermore, the degree of deviation of the detectors 61 on the same circle from the three detection rays provides a reference for determining the distance of the node where the upper grinding ring 321 has a problem.

[0042] To further determine the radial position of the grinding disc system 3, the detector 61 provided by this invention can detect grinding rings at different radial positions. The detector 61 includes a light-shielding plate 612, which provides an effective landing area for light. A detection head 613 is provided at the bottom of the light-shielding plate 612, and a floating rod 614 is provided at the top of the light-shielding plate 612. A locking head 615 is provided at the top of the floating rod 614, and the locking head 615 cooperates with a mounting hole 623 located inside the mounting base 62. The longitudinal section of the mounting hole 623 is crescent-shaped. A floating spring 616 is provided on the outer side of the floating rod 614 and is fitted therewith. The bottom of the floating spring 616 rests against the shoulder of the floating rod 614, and the top of the floating spring 616 rests against the back of the mounting hole 623. The rod body of the floating rod 614 is located in the middle of the mounting hole 623, and the clip 615 at the top of the floating rod 614 is located at the inner top of the mounting hole 623. When the probe head 613 receives significant pressure from the upper grinding disc 32 at the corresponding position, it can generate a corresponding up-and-down movement tendency. The floating spring 616 is used to give the probe head 613 corresponding sensitivity and detection stroke. If the probe head 613 floats with the jumping of the upper grinding ring 321, it can directly change the intersection position of the through hole 611 and the light. By observing the landing point of the light on the detector 61 in different radial directions, the direction of judgment is determined by the problem at the corresponding position of the upper grinding ring 321. In this way, the online balance detection device 6 can provide a reference for workers to judge the real-time working condition of the grinding system 3, which is convenient for providing a basis for judgment. It also facilitates the targeted replacement and repair of the corresponding upper grinding disc 32 and lower grinding disc 31, and appropriate replacement of the standard threading plate 35, so as to avoid the threading plate 35 from undergoing large deformation after long-term service, which would directly affect the grinding condition.

[0043] The receiver 67 provided by the present invention can be a smart screen, which can send the received target points to the control system for fault diagnosis. Alternatively, the receiver 67 can be a non-smart design, such as the receiver 67 including a side plate 671, on which a horizontal rod 672 is provided, and an imaging plate 673 is provided at the end of the horizontal rod 672 facing the convex lens 66. The imaging plate 673 is provided with a reference normal projection target ring, which facilitates manual judgment of faults in the grinding disc system 3.

[0044] To improve the operational stability of the light emitter 65, the light emitter 65 provided by this invention is mounted on a crescent plate 68. A mounting connector 681 is provided on the side of the crescent plate 68, and a first connecting plate 682 is provided on the top of the crescent plate 68. The first connecting plate 682 mates with a first connecting port 621 located inside a mounting base 62. A first screw is provided on the mounting base 62 to connect the first connecting plate 682 and the first connecting port 621. The first connecting plate 682 is integrally fixed to the crescent plate 68, and the position of the mounting base 62 can be locked by the first screw. Three light emitters 65 are evenly arranged on the side of the crescent plate 68 via the mounting connectors 681. The crescent plate 68 provides a recessed travel / distance for the light emitters 65 to horizontally correspond to the through-hole 611 of the detector 61, thereby providing effective detection light and landing spot. Similar to the lower grinding disc 31, the thickness of the innermost and outermost rings of the upper grinding disc 32 is less than the thickness of its middle portion. The upper grinding ring 321 at the thicker position of the upper grinding disc 32 is used to cooperate with the annular groove opened on the lower surface of the pressure plate 34 to ensure the concentricity of the upper grinding ring 321. The two arc surfaces of the hydraulic plate cooperate with the inner arc surface of the detection port 343 and the outer peripheral surface of the second to last upper grinding ring 321, respectively. This provides a corresponding clamping position for the crescent plate 68, thereby providing a reliable emission foundation for the transmitter, especially ensuring that the light emitted under normal operating conditions falls on the receiver 67.

[0045] To improve the working stability of the convex lens 66, the top of the convex lens 66 provided by the present invention is provided with a second connecting plate 661. The second connecting plate 661 cooperates with a second connecting port 622 provided inside the mounting base 62. The mounting base 62 is provided with a second screw connecting the second connecting plate 661 and the second connecting port 622. The cross-section of the convex lens 66 is spindle-shaped, and its refractive index is affected by the material of the convex lens 66 itself. Therefore, a convex lens 66 with a corresponding refractive index is selected according to the center distance between the detection port 343 and the pressure plate 34 to ensure that three radially spaced detection rays can be refracted onto the receiver 67 under standard conditions, providing a reliable reference index for judging the working condition of the grinding disc system 3.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A ball grinding machine for grinding the roundness of finished steel balls, comprising a machine body, a steel ball chute provided on the machine body, a grinding disc system provided inside the steel ball chute, a pressure system and a transmission system respectively provided above and below the grinding disc system, the grinding disc system comprising a lower grinding disc and an upper grinding disc, characterized in that, The lower grinding disc includes multiple concentrically arranged lower grinding rings, each with a lower groove on its top surface. A turntable is located at the bottom of the lower grinding disc. The upper grinding disc includes multiple concentrically arranged upper grinding rings, each with an upper groove on its bottom surface corresponding to the lower groove. A pressure plate connected to a pressurization system is located at the top of the upper grinding disc. The pressure plate has an inlet and an outlet. A detection port is located near the outlet on the pressure plate. An online balance detection device is located at the detection port, comprising multiple detectors that dynamically contact and cooperate with the back of the upper grinding rings. At least three radially distributed threading holes are provided on the surface of each lower grinding ring. Threading plates radially connecting adjacent lower grinding rings are provided in each threading hole. The threading plate has connecting bolts near both ends to connect the lower grinding disc and the turntable. The turntable has positioning grooves that mate with the lower grinding ring. The online balancing detection device includes a mounting base. The side of the mounting base has support feet and positioning bolts that connect to the pressure plate. The detectors are divided into three groups and are radially distributed below the mounting base with the center of the pressure plate as the center. On the side of the mounting base away from the pressure plate, there are three light emitters that correspond one-to-one with the three groups of detectors. On the side of the mounting base near the pressure plate, there is a convex lens. On the side of the convex lens facing away from the mounting base, there is a receiver. The convex lens is used to refract the light emitted by the light emitters to the receiver. The detector includes a through hole corresponding to the light path emitted by the light emitter.

2. The ball grinding machine for grinding the roundness of finished steel balls according to claim 1, characterized in that, The bottom surfaces of the innermost and outermost lower grinding rings are provided with a threading groove that corresponds radially to the threading hole. The connecting bolt includes a stud that is fixedly connected to the threading groove. The threading plate is provided with a connecting hole that mates with the stud. A lock nut is provided at the bottom of the stud.

3. A ball grinding machine for grinding the roundness of finished steel balls according to claim 2, characterized in that, In the three groups of detectors, every three detectors correspond to one upper grinding ring, and the circles containing the three detectors are concentric with the pressure plate.

4. A ball grinding machine for grinding the roundness of finished steel balls according to claim 3, characterized in that, The detector includes a light-shielding plate, a detection head is provided at the bottom of the light-shielding plate, a floating rod is provided at the top of the light-shielding plate, a locking head is provided at the top of the floating rod, the locking head cooperates with the mounting hole provided inside the mounting base, and a floating spring is provided on the outside of the floating rod to cooperate with it.

5. A ball grinding machine for grinding the roundness of finished steel balls according to claim 4, characterized in that, The receiver includes a side plate, on which a horizontal rod is provided, and an imaging plate is provided at the end of the horizontal rod facing the convex lens.

6. A ball-grinding machine for grinding the roundness of finished steel balls according to claim 5, characterized in that, The light emitter is mounted on a crescent plate, the side of the crescent plate is provided with a mounting connector, the top of the crescent plate is provided with a first connecting plate, the first connecting plate is engaged with a first connecting port provided inside the mounting base, and the mounting base is provided with a first screw connecting the first connecting plate and the first connecting port.

7. A ball grinding machine for grinding the roundness of finished steel balls according to claim 6, characterized in that, The top of the convex lens is provided with a second connecting plate, which cooperates with a second connecting port provided inside the mounting base. The mounting base is provided with a second screw connecting the second connecting plate and the second connecting port.

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