CN108890403B - Magnetic grinding disc, equipment and method for finishing rolling surface of cylindrical roller - Google Patents

Magnetic grinding disc, equipment and method for finishing rolling surface of cylindrical roller Download PDF

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Publication number
CN108890403B
CN108890403B CN201810850351.XA CN201810850351A CN108890403B CN 108890403 B CN108890403 B CN 108890403B CN 201810850351 A CN201810850351 A CN 201810850351A CN 108890403 B CN108890403 B CN 108890403B
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grinding disc
grinding
roller
linear groove
disc
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CN108890403A (en
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任成祖
李新
陈洋
张云辉
靳新民
闫传滨
张婧
刘伟峰
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Tianjin University
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Tianjin University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/34—Accessories

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

The invention discloses grinding equipment and a magnetic grinding disc kit for finishing the rolling surface of a cylindrical roller made of ferromagnetic materials. The grinding device comprises a host machine, a magnetic grinding disc kit and a roller circulation disc external system. The host machine comprises a base, a stand column, a cross beam, a sliding table, an upper tray, a lower tray, an axial loading device and a main shaft device. The roller circulation off-disc system comprises a roller collecting mechanism, a roller demagnetizing device, a roller conveying and finishing system and a roller feeding mechanism. The magnetic abrasive disk assembly includes a pair of first and second abrasive disks that are coaxial and are oppositely disposed on their front faces. The front surface of the first grinding disc comprises a group of linear grooves which are radially distributed on the base surface (right circular conical surface) of the first grinding disc, the front surface of the second grinding disc is the working surface (right circular conical surface) of the second grinding disc, and the annular magnetic structure is embedded in the second grinding disc base body. The grinding device has the capability of finishing the rolling surfaces of cylindrical rollers made of large quantities of ferromagnetic materials.

Description

Magnetic grinding disc, equipment and method for finishing rolling surface of cylindrical roller
Technical Field
The invention relates to a magnetic grinding disc kit, grinding equipment and a grinding method for finishing the rolling surface of a cylindrical roller made of ferromagnetic materials (such as GCr15, G20CrNi2MoA, cr4Mo4V and the like), and belongs to the technical field of precision machining of bearing rolling bodies.
Background
Cylindrical roller bearings are widely used in various rotary machines. The shape accuracy and dimensional uniformity of the rolling surface of the cylindrical roller, which is one of the important parts of the cylindrical roller bearing, have an important influence on the performance of the bearing. At present, the known processing technological processes of the cylindrical roller rolling surface include blank forming (turning or cold heading or rolling), rough machining (soft grinding rolling surface), heat treatment, semi-finishing (hard grinding rolling surface) and finish machining. The main process method of the known cylindrical roller rolling surface finish machining is superfinishing.
Superfinishing is a finishing process that utilizes fine-grained oilstones as abrasive tools, the oilstones applying relatively low pressure to the workpiece processing surface and performing high-speed micro-amplitude reciprocating vibration and low-speed feed motion along the workpiece processing surface, thereby achieving micro-cutting. Currently, the finishing of the rolling surface of the cylindrical roller mostly adopts a centerless penetrating superfinishing method. The processing part of the equipment consists of a pair of counter-inclined superfinishing guide rollers and a superfinishing head (or a group of superfinishing heads) provided with oilstones, the cylindrical rollers are supported and driven by the guide rollers, and perform rotary motion and low-speed feeding motion along a track which is matched with the plain line of the rolling surface of the cylindrical rollers, the superfinishing head presses the oilstones to the rolling surface of the cylindrical rollers under lower pressure, and simultaneously the oilstones perform high-speed micro reciprocating vibration along the plain line of the rolling surface of the cylindrical rollers, so that the finish processing is performed on the rolling surface of the cylindrical rollers. In the coreless through-type superfinishing process, the same batch of cylindrical rollers sequentially pass through the machining zone and are subjected to the oilstone superfinishing.
In addition, there is a centreless cut-in superfinishing method, the processing part of the equipment is composed of a pair of superfinishing guide rollers which are arranged in parallel and a superfinishing head (or a group of superfinishing heads) which is provided with oilstones, the cylindrical rollers are supported by the guide rollers and driven to rotate, the superfinishing head presses the oilstones to the rolling surface of the cylindrical rollers under lower pressure, and meanwhile, the superfinishing head carries out low-speed feeding motion and high-speed micro-amplitude reciprocating vibration along a track which is suitable for the element line of the rolling surface of the cylindrical rollers, so as to finish the rolling surface of the cylindrical rollers. In the centerless plunge superfinishing process, cylindrical rollers of the same batch enter the machining area one by one and undergo oilstone superfinishing.
The two cylindrical roller rolling surface superfinishing methods have the following two technical defects: on one hand, the change of the abrasion states of the oilstone and the guide roller along with time in the processing process is not beneficial to the improvement of the shape precision and the dimensional precision of the rolling surface of the cylindrical roller; on the other hand, since the superfinishing equipment processes only a single (or a few) cylindrical roller at a time, the amount of material removed from the rolling surface of the processed cylindrical roller is hardly affected by the difference in diameter of the rolling surface of the cylindrical roller in the same batch, and therefore it is difficult to effectively improve the diameter dispersion of the rolling surface of the processed cylindrical roller by the superfinishing equipment. The technical defects in the two aspects lead to the limitation of improvement of the shape precision and the dimensional consistency of the rolling surface of the processed cylindrical roller.
The device (equipment) and method related to the finishing of the rolling surface of the cylindrical roller at the present stage also comprise the following steps:
chinese patent publication No. CN102476350a: the utility model discloses a cylindrical roller external diameter centerless grinding processingequipment, including two cast iron grinding rolls of radius one big one little, there is the interval between the grinding rolls, installs the feed chute above the interval, is provided with the top board above the feed chute, and the top board top adds and is equipped with the pressurization weight, and the contact surface of top board and roller is convex. The linear speeds of the two grinding rollers are different, so that relative sliding is generated between the cylindrical roller and the grinding rollers. Adjusting the angle of the small grinding roller in the vertical and horizontal directions can drive the roller to feed along the axial direction. The grinding roller drives the cylindrical roller and simultaneously grinds the surface of the roller.
Chinese patent publication No. CN204736036U: a processing device for grinding the outer circular surface of a precise cylindrical roller is disclosed. The method is characterized in that: the processing device comprises an air cylinder, a support frame, a grinding tool bottom plate, a grinding tool, driving rollers and a base, wherein the two driving rollers are parallel to the symmetrical central plane of the processing device, the left end of one driving roller is tilted upwards in a vertical plane to form 1-5 degrees with a horizontal plane, and the right end of the other driving roller is tilted downwards in the vertical plane to form 1-5 degrees with the horizontal plane; the surfaces of the two driving rollers are coated with damping coating to increase friction coefficient. The grinding apparatus is fixed on the grinding apparatus bottom plate, applys the process pressure through the cylinder, and the cylinder is installed on the support frame, and support frame and drive roller are installed on the base. When in processing, the cylindrical rollers are arranged at one end of the driving rollers, tangential force generated by the two driving rollers enables the cylindrical rollers to rotate around the central shaft, generated axial force enables the cylindrical rollers to feed through along the central shaft, and the grinding tool is used for processing the cylindrical surfaces of the rollers.
The two devices all adopt two driving rollers to support and drive the cylindrical roller to advance, a grinding tool is arranged above the cylindrical roller perpendicular to the advancing direction of the cylindrical roller to process the cylindrical surface of the cylindrical roller, and all the cylindrical rollers sequentially pass through a processing area during processing. Such devices have the same two-way technical drawbacks as superfinishing equipment.
Chinese patent publication No. CN104608046a: the invention discloses an ultraprecise processing method of a cylindrical surface of a bearing cylindrical roller, which is characterized by comprising the following steps of: grinding the cylindrical roller to be processed by adopting double-plane cylindrical part excircle ultra-precision processing equipment; the adopted double-plane cylindrical part excircle ultra-precision machining equipment comprises: the upper grinding disc, the lower grinding disc, the outer gear ring, the eccentric wheel and the retainer are concentrically arranged, and are driven independently; a plurality of workpiece clamping slots are formed in the surface of the disc-shaped retainer, and the slots are radially distributed; the rotating shaft of the retainer is arranged concentrically with the center of the eccentric wheel, and the center of the retainer and the axle center of the eccentric wheel have offset distance; the retainer is matched with the gear of the outer gear ring, and the retainer is driven by the outer gear ring and the eccentric wheel simultaneously. Before grinding, placing the cylindrical roller in a slot hole of a retainer, and applying a downward pressure on an upper grinding disc; the workpiece is positioned between the upper grinding disc and the lower grinding disc and is contacted with the upper grinding disc and the lower grinding disc; the upper grinding disc, the lower grinding disc, the outer gear ring and the eccentric wheel are driven to rotate, and the workpiece moves in a rolling mode under the driving of the upper grinding disc and the lower grinding disc and simultaneously moves in a cycloid mode around the upper grinding disc and the lower grinding disc under the driving of the retainer.
Chinese patent publication No. CN103522166a: the invention discloses a cylindrical part excircle processing method based on upper disc eccentric pressurization, which is characterized in that: the processing device of the processing method comprises an upper grinding disc, a retainer and a lower grinding disc. The upper grinding disc is positioned above the lower grinding disc, the retainer is positioned between the upper grinding disc and the lower grinding disc, the rotating shaft of the retainer and the rotating shaft of the lower grinding disc are coaxially arranged, and a certain offset exists between the rotating shaft of the upper grinding disc and the rotating shaft of the retainer. During processing, the loading device acts on the cylindrical part eccentrically through the upper grinding disc, and the outer circle of the cylindrical part is processed through the plane cooperation abrasive of the upper grinding disc and the lower grinding disc.
Chinese patent publication No. CN105798765a: the invention discloses a four-plane reciprocating cylindrical roller grinding method and a device, which are characterized in that: the frame is internally provided with a mounting frame driven by a power source to rotate, and the circumferential outer wall of the mounting frame is provided with a plurality of mounting grooves for mounting cylindrical rollers; and a grinding plate which is in sliding fit with the cylindrical roller is correspondingly arranged on the frame and the mounting frame. When the grinding device is used, the cylindrical rollers are arranged on the mounting frame, and the plurality of cylindrical rollers in the grinding plate are ground simultaneously by rotating the mounting frame.
The three devices (equipment) can process a plurality of cylindrical parts simultaneously, and the cylindrical parts with larger diameters have larger removal amount of the cylindrical surface materials, thereby being beneficial to the improvement of the dimensional consistency. However, such devices (facilities) do not have high volume production capacity due to the closed nature of their processing devices (facilities).
Chinese patent publication nos. CN104493689a and CN104493684a: a cylindrical part double-disc straight groove grinding disc, grinding equipment and a grinding method are disclosed, wherein the equipment comprises a workpiece propelling device, a workpiece conveying device and a grinding disc device. The grinding disc device comprises a first grinding disc and a second grinding disc, the two grinding discs rotate relatively, the working surface of the first grinding disc is a plane, a group of radial straight grooves are formed in the surface of the second grinding disc, which is opposite to the first grinding disc, the two side surfaces of each straight groove are working surfaces of the second grinding disc, the cross section outline of each working surface of each second grinding disc is arc-shaped or V-shaped with an arc, and the value range of an included angle between a normal plane at the contact point of a workpiece to be machined and the straight groove or the midpoint of the contact arc and the reference surface of each straight groove is 30-60 degrees; the workpiece pushing device is arranged in a central through hole of the second grinding disc and comprises a main body, and a plurality of pushing mechanisms and storage tanks which are arranged on the main body. Under the pressure and grinding lubrication conditions of the grinding processing, the friction coefficient between the working face material of the first grinding disc and the material of the workpiece to be processed is larger than that between the working face material of the second grinding disc and the material of the workpiece to be processed, so that the spin of the workpiece to be processed in the grinding processing is ensured.
When the equipment is used for grinding the cylindrical surface of the cylindrical roller, on one hand, the cylindrical roller can circulate inside and outside the grinding disc, and the equipment has the capacity of mass production; on the other hand, in the grinding processing area, the device can simultaneously carry out comparative processing on a large number of cylindrical rollers, so that more cylindrical surface materials of the cylindrical rollers with larger diameters are removed, and the improvement of the uniformity of the cylindrical surface dimensions of the cylindrical rollers is facilitated.
However, with the conventional double-disk straight groove polishing disk, the number of straight grooves which can be provided in the second polishing disk is small due to the restriction of the diameter of the central through hole of the second polishing disk. The improvement scheme is as follows: the working surface of the first grinding disc is a conical surface, and a group of radial straight grooves are arranged on the surface of the second grinding disc opposite to the working surface (conical surface) of the first grinding disc. On the one hand, under the condition that the outer diameter of the second grinding disc and the length of the straight grooves are fixed, the diameter of the central through hole can be increased by adjusting the cone apex angle of the conical surface of the first grinding disc, so that the number of the straight grooves on the second grinding disc is increased. With the increase of the number of the straight grooves on the second grinding disc, the number of the cylindrical rollers participating in the grinding process is increased, and the grinding process efficiency and the size consistency of the cylindrical surfaces of the cylindrical rollers can be improved. On the other hand, compared with a plane grinding disc, the conical surface grinding disc has the advantage of self-centering, and is more beneficial to improving the uniformity of the cylindrical surface dimension of the cylindrical roller.
Further, the condition that the workpiece to be processed realizes spin in the grinding processing is guaranteed that the friction coefficient between the working face material of the first grinding disc and the workpiece to be processed is larger than that between the working face material of the second grinding disc and the workpiece to be processed under the pressure of the grinding processing and the grinding lubrication condition, and the matching of the working face materials of the first grinding disc and the second grinding disc which can meet the condition of the friction system and have good grinding performance is difficult to select in the actual grinding processing. The improvement scheme is as follows: a magnetic structure is disposed within the interior of the first abrasive disk to form a magnetic field adjacent the working surface of the first abrasive disk. The magnetic field intensity of the magnetic structure is adjusted, so that the first grinding disc working face generates strong enough magnetic attraction force to the processed cylindrical roller of the ferromagnetic material, and the sliding friction driving moment generated by the rotation of the processed cylindrical roller of the ferromagnetic material around the self axis of the processed cylindrical roller of the ferromagnetic material is larger than the sliding friction resistance moment generated by the rotation of the second grinding disc working face around the self axis of the processed cylindrical roller of the ferromagnetic material, so that the processed cylindrical roller of the ferromagnetic material is driven to continuously rotate around the self axis.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a magnetic grinding disc kit, grinding equipment and a grinding method for finishing the cylindrical roller rolling surface of ferromagnetic materials such as GCr15, G20CrNi2MoA, cr4Mo4V and the like, wherein the grinding equipment provided with the magnetic grinding disc kit has the finishing capability of the cylindrical roller rolling surface of a large quantity of ferromagnetic materials, can realize the high-point material removal, the low-point material removal and the material removal of the cylindrical roller rolling surface with larger diameter and the material removal of the cylindrical roller rolling surface with smaller diameter, thereby improving the shape precision and the size consistency of the cylindrical roller rolling surface of the ferromagnetic materials, improving the processing efficiency of the cylindrical roller rolling surface of the ferromagnetic materials and reducing the processing cost.
In order to solve the technical problems, the magnetic grinding disc kit for finishing the rolling surface of the cylindrical roller made of ferromagnetic materials comprises a pair of first grinding discs and second grinding discs which are coaxial, wherein the front surfaces of the first grinding discs and the front surfaces of the second grinding discs are oppositely arranged;
the front surface of the first grinding disc comprises a group of radial linear grooves and transition surfaces connected with the adjacent linear grooves; the surface of the linear groove comprises a linear groove working surface which is contacted with the rolling surface of the cylindrical roller to be processed during grinding processing and a non-working surface which is not contacted with the rolling surface of the cylindrical roller to be processed; the linear groove working surface is arranged on a linear groove scanning surface, and the linear groove scanning surface is a constant-section scanning surface; the scanning path of the linear groove scanning surface is a straight line, and the generatrix of the linear groove scanning surface is in the normal section of the linear groove; in the straight line groove normal section, the normal section outline of the straight line groove scanning surface is an arc with the curvature radius equal to that of the rolling surface of the processed cylindrical roller; the scanning path of the linear groove scanning surface passes through the curvature center of the normal section outline, and the scanning path is a linear groove baseline; all the linear groove base lines are distributed on a right conical surface, the right conical surface is a first grinding disc base surface, the axis of the first grinding disc base surface is a first grinding disc axis, and the cone apex angle of the first grinding disc base surface is 2 alpha;
The linear groove base line is arranged in the first grinding disc shaft section, and the first grinding disc shaft section containing the linear groove base line is the center plane of the linear groove working surface; placing the processed cylindrical roller in the linear groove as a reference object, and enabling the rolling surface of the processed cylindrical roller to be in surface contact with the linear groove working surface, wherein the axis of the processed cylindrical roller is in the central plane of the linear groove working surface, and the axis of the processed cylindrical roller is overlapped with the linear groove base line; during grinding, the axis of the cylindrical roller to be machined is in the central plane of the linear groove working surface, the rolling surface of the cylindrical roller to be machined is in surface contact with the linear groove working surface, and the axis of the cylindrical roller to be machined is overlapped with the linear groove base line;
the front surface of the second grinding disc is a right conical surface and is also a second grinding disc working surface, the axis of the second grinding disc working surface is a second grinding disc axis, the cone apex angle of the second grinding disc working surface is 2β, and 2α+2β=360°;
when 2α=2β=180°, the first grinding disc axis is perpendicular to the first grinding disc base surface, the second grinding disc axis is perpendicular to the second grinding disc working surface, and there is a case where the linear groove base line is not within the first grinding disc shaft section in addition to the linear groove base line being within the first grinding disc shaft section; when the linear groove base line is not in the first grinding disc shaft section, the central plane of the linear groove working surface is a plane which comprises the linear groove base line and is parallel to the first grinding disc shaft line;
The second grinding disc substrate is made of magnetic conductive materials, and an annular magnetic structure is embedded in the second grinding disc substrate so as to form a magnetic field near the working surface of the second grinding disc along the direction of a section line of the shaft section of the working surface of the second grinding disc; a group of annular band-shaped or spiral band-shaped non-magnetic conductive materials are embedded in the second grinding disc working surface so as to increase the magnetic resistance of the second grinding disc working surface along the axis section sectional line direction of the second grinding disc working surface; the magnetic conductive material of the second grinding disc substrate and the embedded annular band-shaped or spiral band-shaped non-magnetic conductive material are tightly connected and jointly form the second grinding disc working surface, so that the second grinding disc working surface has the adsorption capacity on the processed cylindrical roller made of ferromagnetic materials.
Further, each linear groove inlet of the first grinding disc is positioned at the outer edge of the first grinding disc, and each linear groove outlet of the first grinding disc is positioned at the inner edge of the first grinding disc; or each linear groove inlet of the first grinding disc is positioned at the inner edge of the first grinding disc, and each linear groove outlet of the first grinding disc is positioned at the outer edge of the first grinding disc.
When in grinding processing, under the constraint of the linear groove working surface of the first grinding disc, the rolling surface of the processed cylindrical roller is in line contact with the working surface of the second grinding disc; the cylindrical roller to be processed has only a rotational movement degree about its own axis and a translational movement degree along the linear groove base line.
During grinding, cylindrical rollers to be processed are fully distributed in each linear groove of the first grinding disc along the linear groove base line. Definition: the area formed by the surrounding of the linear groove working surface of the first grinding disc and the working surface of the second grinding disc is a grinding processing area.
The invention also provides grinding equipment for finishing the rolling surface of the cylindrical roller made of ferromagnetic materials, which comprises a host machine, a roller circulation disc external system and a magnetic grinding disc kit;
the host comprises a base, an upright post, a cross beam, a sliding table, an upper tray, a lower tray, an axial loading device and a main shaft device;
the base, the upright posts and the cross beams form a frame of the host; the upright post also plays a role in guiding the sliding table to move up and down.
The first grinding disc of the magnetic grinding disc kit is connected with the lower tray, and the second grinding disc of the magnetic grinding disc kit is connected with the upper tray;
The main shaft device is arranged on the sliding table, and drives the second grinding disc to rotate around the axis of the second grinding disc through the upper tray connected with the main shaft device; the lower tray is mounted on the base;
the sliding table is connected with the cross beam through the axial loading device; the upright post can also serve as a guide component to provide a guide function for the sliding table to move linearly along the axis of the second grinding disc; the sliding table is driven by the axial loading device, and under the constraint of the upright post or other guide components, the sliding table, the main shaft device, the upper tray connected with the main shaft device and the second grinding disc connected with the upper tray move linearly along the axis of the second grinding disc;
the roller circulation outside-disc system comprises a roller collecting mechanism, a roller demagnetizing device, a roller conveying and finishing system and a roller feeding mechanism;
the roller collecting mechanism is arranged at each linear groove outlet of the first grinding disc and is used for collecting processed cylindrical rollers which leave the grinding processing area from each linear groove outlet;
the roller conveying and arranging system is used for conveying the processed cylindrical rollers from the roller collecting mechanism to the roller feeding mechanism and adjusting the axes of the processed cylindrical rollers to the direction required by the roller feeding mechanism;
Each linear groove of the first grinding disc is provided with a roller feeding mechanism, and the roller feeding mechanisms are respectively arranged at the inlets of the linear grooves of the first grinding disc and are used for pushing the processed cylindrical rollers into the inlets of the linear grooves of the first grinding disc and providing thrust for the linear feeding movement of the processed cylindrical rollers along the base lines of the linear grooves;
when in grinding processing, the processed cylindrical rollers enter a grinding processing area from each linear groove inlet of the first grinding disc, leave the grinding processing area from each linear groove outlet of the first grinding disc, and enter each linear groove inlet of the first grinding disc sequentially through the roller collecting mechanism, the roller conveying and sorting system and the roller feeding mechanism to form a cycle of linear feeding of the processed cylindrical rollers between the first grinding disc and the second grinding disc along a linear groove baseline and collecting, conveying, sorting and feeding through a roller circulating disc external system; the path of the circulation outside the magnetic grinding disc kit is from each linear groove outlet of the first grinding disc, sequentially passes through the roller collecting mechanism, the roller conveying and sorting system and the roller feeding mechanism, enters each linear groove inlet of the first grinding disc, and is defined as a roller circulation disc outer path;
The roller demagnetizing device is arranged in the roller conveying finishing system or before the roller conveying finishing system in the outer path of the roller circulating disc and is used for demagnetizing the processed cylindrical roller made of ferromagnetic materials and magnetized by the magnetic field of the annular magnetic structure in the second grinding disc matrix;
during grinding, the second grinding disc rotates around the axis; the sliding table approaches to the first grinding disc along the axis of the second grinding disc along with an upper tray connected with the sliding table and a second grinding disc connected with the upper tray under the constraint of the upright post or other guide components, and working pressure is applied to the processed cylindrical rollers distributed in each linear groove of the first grinding disc.
Further, during grinding, the magnetic field intensity of the annular magnetic structure is adjusted, so that the sliding friction driving moment generated by the rotation of the second grinding disc working face around the axis of the ferromagnetic cylindrical roller to be processed is larger than the sliding friction resistance moment generated by the rotation of the linear groove working face of the first grinding disc around the axis of the ferromagnetic cylindrical roller to be processed, and the ferromagnetic cylindrical roller to be processed is driven to continuously rotate around the axis of the first grinding disc.
The invention also provides a grinding method for finishing the rolling surface of the cylindrical roller made of ferromagnetic materials by using the grinding equipment, which comprises the following steps:
the method comprises the steps that firstly, a second grinding disc approaches to a first grinding disc along the axis of the second grinding disc until a space of each grinding processing area formed by the surrounding of a linear groove working surface of the first grinding disc and a linear groove working surface of the second grinding disc can only accommodate a row of processed cylindrical rollers along the direction of a linear groove base line;
step two, the axis of the second grinding coil rotates at a low speed of 1-10 rpm relative to the first grinding disc;
step three, starting a roller demagnetizing device, a roller conveying and finishing system and a roller feeding mechanism; the conveying speed and the finishing speed of the roller conveying and finishing system are adjusted to be matched with the feeding speed of the roller feeding mechanism, so that the processed cylindrical rollers continuously enter the grinding processing area from each linear groove inlet of the first grinding disc under the action of the roller feeding mechanism, do linear feeding motion along a linear groove base line, penetrate through the linear grooves and leave the grinding processing area from each linear groove outlet of the first grinding disc through the roller conveying and finishing system; the processed cylindrical rollers leaving the grinding processing area enter the grinding processing area from each linear groove inlet of the first grinding disc sequentially under the action of the roller feeding mechanism after the original sequence is disturbed through the roller collecting mechanism, the roller demagnetizing device and the roller conveying and sorting system, so that the linear feeding of the processed cylindrical rollers between the first grinding disc and the second grinding disc along the linear groove base line and the circulation of collecting, conveying, sorting and feeding through the roller circulation disc external system are established;
Step four, adjusting the rotation speed of the second grinding disc to 15-60 rpm working rotation speed, adjusting the feeding speed of the roller feeding mechanism to the working feeding speed to match with the working rotation speed of the second grinding disc, and adjusting the conveying speed and the finishing speed of the roller conveying and finishing system to ensure that the stock of the processed cylindrical rollers in the roller collecting mechanism, the roller conveying and finishing system and the roller feeding mechanism in the system outside the roller circulating disc is matched and circulated smoothly and orderly;
fifthly, filling grinding liquid into the grinding processing area;
step six, the annular magnetic structure in the second grinding disc matrix enters a working state; the second grinding disc approaches to the first grinding disc along the axis of the second grinding disc, so that the rolling surface of the processed cylindrical roller in the grinding processing area is respectively in surface contact with the linear groove working surface of the first grinding disc and in line contact with the working surface of the second grinding disc, and an initial working pressure of 0.5-2N is applied to each processed cylindrical roller distributed in the grinding processing area according to the average of each processed cylindrical roller; the magnetic field intensity of the annular magnetic structure is adjusted, so that the sliding friction driving moment generated by the rotation of the processed cylindrical roller of the ferromagnetic material of the working face of the second grinding disc around the axis of the processed cylindrical roller is larger than the sliding friction resistance moment generated by the rotation of the processed cylindrical roller of the ferromagnetic material of the working face of the linear groove of the first grinding disc around the axis of the processed cylindrical roller, and the processed cylindrical roller of the ferromagnetic material is driven to continuously rotate around the axis of the processed cylindrical roller; meanwhile, the processed cylindrical roller makes linear feeding movement along the linear groove base line of the first grinding disc under the action of the roller feeding mechanism; the rolling surface of the processed cylindrical roller starts to be subjected to the grinding processing of the linear groove working surface of the first grinding disc and the working surface of the second grinding disc;
Step seven, along with stable operation of the grinding process, gradually increasing the working pressure of each processed cylindrical roller distributed in the grinding processing area H to 2-50N of normal working pressure; the processed cylindrical roller keeps the contact relation with the linear groove working surface of the first grinding disc and the working surface of the second grinding disc, the continuous rotation motion around the self axis and the linear feeding motion along the linear groove base line, and the rolling surface of the processed cylindrical roller continuously undergoes the grinding processing of the linear groove working surface of the first grinding disc and the working surface of the second grinding disc;
step eight, performing spot check on the cylindrical roller to be processed after a period of grinding cycle according to different grinding processes; when the surface quality, the shape precision and the size consistency of the rolling surface of the processed cylindrical roller which is subjected to the spot check do not meet the technical requirements, continuing the grinding processing of the step; when the surface quality, the shape precision and the size consistency of the rolling surface of the processed cylindrical roller of the spot check meet the technical requirements, entering a step nine;
step nine, gradually reducing the working pressure and finally reaching zero; stopping the operation of the roller conveying and finishing system and the roller feeding mechanism, and adjusting the rotating speed of the second grinding disc to zero; the annular magnetic structure is switched to a non-working state, and the roller demagnetizing device is stopped; stopping filling the grinding processing area with the grinding liquid; the second abrasive disk is retracted along its axis to the inactive position; and finishing the grinding processing.
Before the first grinding disc and the second grinding disc are used for the first time, the linear groove working surface of the first grinding disc and the working surface of the second grinding disc are ground by utilizing the processed cylindrical rollers made of ferromagnetic materials with the same geometric parameters; the running-in method is the same as the grinding method of the cylindrical roller to be processed; performing spot check on the machined cylindrical roller which participates in running-in, and when the surface quality, the shape precision and the size consistency of the rolling surface of the machined cylindrical roller which are subjected to spot check meet the technical requirements, entering a step nine in the running-in process, and finishing running-in; otherwise, continuing to step eight.
Compared with the prior art, the invention has the beneficial effects that:
in the grinding process, in each grinding processing area formed by encircling the linear groove working face of the first grinding disc and the linear groove working face of the second grinding disc, the rolling surface of the processed cylindrical roller is respectively in surface contact with the linear groove working face of the first grinding disc and in line contact with the linear groove working face of the second grinding disc, the processed cylindrical roller rotates around the axis of the processed cylindrical roller under the friction drive of the working face of the second grinding disc, and the rolling surface of the processed cylindrical roller and the linear groove working face of the first grinding disc relatively slide, so that the grinding processing of the rolling surface of the processed cylindrical roller is realized. The material removal of the rolling surface is directly related to the contact stress of the rolling surface and the linear groove working surface, when the rolling surface of the processed cylindrical roller with larger diameter or the high point of the rolling surface of the processed cylindrical roller is contacted with the linear groove working surface, the contact stress of the rolling surface and the linear groove working surface is larger, and the material removal amount of the rolling surface at the contact position is larger; when the rolling surface of the machined cylindrical roller of smaller diameter or the low point of the rolling surface of the machined cylindrical roller is in contact with the linear groove working surface, the contact stress of the rolling surface and the linear groove working surface is smaller, and the material removal amount of the rolling surface at the contact is smaller. Therefore, the high-point material is removed more, the low-point material is removed less on the rolling surface of the cylindrical roller, the material is removed more on the rolling surface of the cylindrical roller with larger diameter, and the material is removed less on the rolling surface of the cylindrical roller with smaller diameter.
Due to the open design of the linear groove of the first grinding disc, the linear feeding of the processed cylindrical rollers between the first grinding disc and the second grinding disc along the linear groove base line and the circulation of collecting, conveying, arranging and feeding through the roller circulation disc external system exist in the grinding processing, and the original sequence of the processed cylindrical rollers can be disturbed when the processed cylindrical rollers pass through the roller circulation disc external system.
On the one hand, the open design of the linear grooves of the first grinding disc is very suitable for the finish machining of the rolling surfaces of large-batch cylindrical rollers; on the other hand, the above-mentioned characteristic "high point material is removed more and low point material is removed less from the rolling surface of the cylindrical roller, material is removed more from the rolling surface of the cylindrical roller having a larger diameter and material is removed less from the rolling surface of the cylindrical roller having a smaller diameter" is allowed to spread to the whole processing lot by the order of the cylindrical rollers to be processed which are disturbed when the outside-disk system is circulated by the rollers, so that the shape accuracy and dimensional uniformity of the rolling surface of the cylindrical roller of the whole lot can be improved; in still another aspect, ten or more to tens of cylindrical rollers to be processed are distributed in each grinding processing area formed by surrounding the linear groove working surface of the first grinding disc and the working surface of the second grinding disc, and hundreds or even thousands of cylindrical rollers to be processed participate in grinding in a plurality of grinding processing areas between the first grinding disc and the second grinding disc, so that the processing efficiency of the rolling surface of the cylindrical rollers can be improved, and the processing cost is reduced.
Furthermore, due to the conical design of the base surface of the first grinding disc, in particular when the linear groove inlets are provided at the outer edge of the first grinding disc, more, longer linear grooves can be designed on the front surface of the first grinding disc, i.e. a greater number of cylindrical rollers to be processed can simultaneously participate in the grinding.
Further, due to the arrangement of the magnetic structure in the second grinding disc, the magnetic attraction force of the second grinding disc working face to the processed cylindrical roller of the ferromagnetic material is introduced into the force balance system of the processed cylindrical roller of the ferromagnetic material, and is independent of the working pressure applied to the processed cylindrical roller of the ferromagnetic material by the relative approach of the first grinding disc and the second grinding disc during grinding, so that the sliding friction driving moment generated by the condition that the second grinding disc working face rotates around the axis of the processed cylindrical roller of the ferromagnetic material is larger than the sliding friction resistance moment generated by the linear groove working face of the first grinding disc rotating around the axis of the processed cylindrical roller of the ferromagnetic material can be realized more easily.
Drawings
FIG. 1 is a schematic view of a magnetic abrasive disk package of the present invention;
FIG. 2 (a) is a schematic view showing the contact relationship between the rolling surface of the cylindrical roller to be processed and the working surface of the linear groove of the first grinding disc;
FIG. 2 (b) is a schematic view of the three-dimensional structure of a cylindrical roller being processed;
FIG. 2 (c) is a schematic view of the scanning profile of the linear groove scanning surface of the first polishing disc of the present invention;
FIG. 3 is a schematic view of a first abrasive disk base surface of the present invention;
FIG. 4 (a) is a schematic view showing the structure of a second grinding disc and the contact relationship between a cylindrical roller to be processed and the working surface of the second grinding disc;
fig. 4 (b) is an enlarged view of the portion E in fig. 4 (a);
FIG. 5 is a schematic view showing the distribution of the cylindrical roller to be processed between the linear groove and the working face of the second grinding disc in the grinding state of the present invention;
FIG. 6 (a) is a schematic view of the magnetic structure of the second abrasive disk of the present invention and the distribution of magnetic fields near the working surface of the second abrasive disk;
fig. 6 (b) is an enlarged view of the F portion in fig. 6 (a), showing a schematic view of a processed cylindrical roller in which magnetic lines of force preferentially pass through ferromagnetic material in the vicinity of the working surface of the second polishing pad;
FIG. 7 is a schematic diagram of a mainframe of the polishing apparatus of the present invention;
FIG. 8 is a schematic view of a cycle of cylindrical rollers being processed of the grinding apparatus of the present invention;
fig. 9 is a schematic view showing the circulation of the cylindrical roller to be processed inside and outside the magnetic polishing disc set in the state of polishing processing according to the present invention.
In the figure:
11-a base;
12-stand columns;
13-a cross beam;
14-a sliding table;
15-upper tray;
16-a lower tray;
17-axial loading means;
18-a spindle device;
2-a magnetic abrasive disk kit;
21-a first abrasive disk;
211-a first abrasive disk front face;
2111-straight grooves;
21111-linear groove face;
21112-center plane;
21113-linear groove scan surface;
211131-normal cross-sectional profile;
21114-straight line trench cross section;
21116—linear groove baseline;
21118-linear trench entrance;
21119-linear trench outlet;
2112-transition surfaces connecting adjacent linear grooves;
212-a first abrasive disk mounting surface;
213-a first abrasive disk axis;
214-a first abrasive disk base surface;
2141—an axial section cut-line of the first abrasive disk base surface;
215-first abrasive disk shaft cross section;
22-a second abrasive disk;
220-a second abrasive disk substrate;
221-a second abrasive disk working surface;
2210—an axial section cut-line of the working surface of the second grinding disc;
222-a second abrasive disk mounting surface;
223-second abrasive disk axis;
225-a second abrasive disk shaft section;
226-ring magnetic structure;
227-magnetic field;
228-a non-magnetically permeable material;
3-a cylindrical roller to be processed;
31-axis;
32-a rolling surface;
41-a roller collection mechanism;
42-roller demagnetizing device;
43-roller conveying finishing system;
45-roller feed mechanism;
451-roller feed channels;
4511-roller feed channel locating surface;
A. distal points of the normal cross-sectional profile of the B-linear groove scanning surface on both sides of the center plane;
alpha is the cone apex half angle of the base surface of the first grinding disc;
the half angle of the cone apex of the working surface of the beta-second grinding disc;
θ 1 、θ 2 -the central angles of the distal points of the normal cross-sectional profile of the linear groove scan surface on both sides of the central plane;
d-embedding depth of the non-magnetic conductive material;
s-embedding pitch or pitch of the non-magnetic conductive material;
t-thickness of the non-magnetically permeable material.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings. The embodiments described by referring to the drawings are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention. The dimensions, materials, shapes, relative arrangements, and the like of the constituent parts described in the following embodiments are not limited to those described specifically.
The invention provides a magnetic grinding disc kit for finishing a cylindrical roller rolling surface of a ferromagnetic material (such as GCr15, G20CrNi2MoA, cr4Mo4V and the like), which comprises a pair of first grinding discs 21 and second grinding discs 22 which are coaxial, wherein a first grinding disc front surface 211 is opposite to a second grinding disc front surface 221, as shown in fig. 1, reference numeral 213 is a first grinding disc axis, and reference numeral 223 is a second grinding disc axis.
The first grinding disc mounting surface 212 and the second grinding disc mounting surface 222 are opposite to the first grinding disc front surface 211 and the second grinding disc front surface 221 respectively, and the first grinding disc 21 and the second grinding disc 22 are connected with corresponding mounting foundations on the grinding device through the respective mounting surfaces respectively.
The first abrasive disk front surface 211 includes a set (not less than 3) of radially-distributed linear grooves 2111 and a transition surface 2112 connecting adjacent linear grooves.
As shown in fig. 2 (a), the surface of the linear groove 2111 includes a linear groove working surface 21111 which comes into contact with the rolling surface 32 of the cylindrical roller 3 to be processed at the time of grinding processing and a non-working surface (not shown) which does not come into contact with the rolling surface 32 of the cylindrical roller to be processed. Fig. 2 (b) shows a three-dimensional structure of the cylindrical roller 3 to be processed.
As shown in fig. 2 (a), the linear groove working surface 21111 is on a linear groove scanning surface 21113, and the linear groove scanning surface 21113 is a constant cross-section scanning surface; the scan path of the linear channel scan surface 21113 is linear, and the generatrix (i.e., scan profile) of the linear channel scan surface 21113 is within the linear channel normal section 21114. The straight-line trench normal section 21114 is a plane perpendicular to the scanning path (straight line) of the straight-line trench 21111.
As shown in fig. 2 (a) and 2 (c), in the straight-groove normal section 21114, the normal section contour 211131 of the straight-groove scanning surface 21113 (i.e., the scanning contour in the straight-groove normal section 21114) is an arc having a radius of curvature equal to the radius of curvature of the rolling surface 32 of the cylindrical roller to be processed, and the scanning path of the straight-groove scanning surface 21113 is defined by passing through the center of curvature of the normal section contour 211131: the scan path (straight line) is a straight line trench baseline 21116.
The specific meaning of the straight line groove scanning surface 21113 being a constant section scanning surface is: the normal cross-sectional profile 211131 of the linear channel scan surface 21113 remains unchanged within the linear channel normal cross-section 21114 at different locations of the linear channel baseline 21116.
It will be appreciated that the relationship of the linear groove scanning surface 21113 and the linear groove working surface 21111 thereon according to the present invention is: the linear channel scan surface 21113 defines the shape, location and boundaries of the linear channel work surface 21111, the linear channel scan surface 21113 being a continuous surface; the linear groove working surface 21111 and the corresponding linear groove scanning surface 21113 have the same shape, position and boundary, and the linear groove working surface 21111 may be discontinuous without affecting the contact relationship between the cylindrical roller 3 and the linear groove working surface 21111 and without affecting the grinding uniformity of the rolling surface 32 of the cylindrical roller.
As shown in fig. 3, all the linear groove baselines 21116 are distributed on a right circular cone, defining: the right conical surface is a first grinding disc base surface 214, and the axis of the first grinding disc base surface 214 is a first grinding disc axis 213.
Definition: the cone apex angle 2α of the first grinding disc base surface 214 is an included angle of the axis section line 2141 of the first grinding disc base surface located at the solid side of the first grinding disc 21 in the first grinding disc axis section 215, and the reference symbol α is a cone apex half angle of the first grinding disc base surface 214.
The first abrasive disk base surface 21116 defines within the first abrasive disk shaft section 215: the first abrasive disk shaft section 215 containing the linear groove baseline 21116 is the center plane 21112 of the linear groove working surface 21111. As shown in fig. 2 (c), in the straight-line groove normal section 21114, the normal section contour 211131 of the straight-line groove scanning surface 21113 where the straight-line groove working surface 21111 is located has the central angles θ of the distal points a and B on both sides of the center plane 21112 1 ≤90°、θ 2 ≤90°。
The axis 31 of the cylindrical roller to be processed is positioned in the center plane 21112 of the linear groove working surface 21111 by placing the cylindrical roller to be processed 3 as a reference in the linear groove 2111 and bringing the rolling surface 32 of the cylindrical roller to be processed into surface contact with the linear groove working surface 21111, and the axis 31 of the cylindrical roller to be processed coincides with the linear groove base line 21116. In the grinding process, the axis 31 of the cylindrical roller to be machined is in the center plane 21112 of the linear groove working surface, the rolling surface 32 of the cylindrical roller to be machined is in surface contact with the linear groove working surface 21111, and the axis 31 of the cylindrical roller to be machined is superposed on the linear groove base line 21116. See fig. 3.
During the polishing process, the cylindrical roller 3 to be processed sequentially enters the linear grooves 2111 from the respective linear groove inlets 21118 of the first polishing disk, passes through the linear grooves 2111 and exits the linear grooves 2111 from the respective corresponding linear groove outlets 21119, see fig. 9.
Each linear groove inlet 21118 of the first polishing disc is provided at the outer edge of the first polishing disc 21, and each linear groove outlet 21119 of the first polishing disc is provided at the inner edge of the first polishing disc 21. Or each linear groove inlet 21118 of the first grinding disc is arranged at the inner edge of the first grinding disc 21, and each linear groove outlet 21119 of the first grinding disc is arranged at the outer edge of the first grinding disc 21. It is recommended that each linear groove inlet 21118 of the first grinding disc is provided at the outer edge of the first grinding disc 21, and each linear groove outlet 21119 of the first grinding disc is provided at the inner edge of the first grinding disc 21, see fig. 9.
It is recommended that all of the linear grooves 2111 be uniformly distributed about the first grinding disk axis 213.
As shown in fig. 1 and fig. 4 (a), the front surface of the second grinding disc is a right circular conical surface, the right circular conical surface is a second grinding disc working surface 221, and the axis of the second grinding disc working surface 221 is a second grinding disc axis 223. Definition: the cone apex angle 2β of the second polishing disc working surface 221 is an angle formed by the axis section cross-section 2210 of the second polishing disc working surface located on the solid side of the second polishing disc 22 in the second polishing disc axis section 225. Reference numeral β is the cone apex half angle of the second abrasive disk working surface 221.
The cone apex angle 2β of the second grinding disc working surface 221 and the cone apex angle 2α of the first grinding disc base surface 214 satisfy the relationship:
2α+2β＝360°
in the polishing process, under the constraint of the linear groove working surface 21111 of the first polishing pad, as shown in fig. 4 (a) and 4 (b), the portion E of fig. 4 (a) is enlarged in fig. 4 (b), and the rolling surface 32 of the cylindrical roller to be processed is in line contact (tangential contact) with the second polishing pad working surface 221 while being in surface contact with the linear groove working surface 21111 of the first polishing pad. The cylindrical roller 3 to be processed has only a rotational movement degree about its own axis 31 and a translational movement degree along the linear groove base line 21116.
When 2α=2β=180°, the first and second grinding disc base surfaces 214, 221 are both planar; the first abrasive disk axis 213 is perpendicular to the first abrasive disk base surface 214, the second abrasive disk axis 223 is perpendicular to the second abrasive disk working surface 221, and there are cases where the linear groove baseline 21116 is not within the first abrasive disk shaft section 215 in addition to the linear groove baseline 21116 being within the first abrasive disk shaft section 215. When the linear groove baseline 21116 is not within the first grinding disc axial section 215, the center plane 21112 of the linear groove working face is a plane that contains the linear groove baseline 21116 and is parallel to the first grinding disc axis 213, and when grinding is performed, the axis 31 of the machined cylindrical roller is not within the first grinding disc axial section 215 and the second grinding disc axial section 225.
As shown in fig. 5, in the polishing process, the cylindrical rollers 3 to be processed are fully distributed along the linear groove base lines 21116 in each linear groove 2111 of the first polishing disk. Definition: the area surrounded by the linear groove working surface 21111 of the first polishing pad and the working surface 221 of the second polishing pad is a polishing area.
As shown in fig. 6 (a) and 6 (b), fig. 6 (b) shows an enlargement of the F portion of fig. 6 (a), the second polishing pad body 220 is made of a magnetically conductive material, and an annular magnetic structure 226 is embedded in the second polishing pad body 220 to form a magnetic field 227 near the second polishing pad working surface 221 along the axis cross-section 2210 of the second polishing pad working surface. A set of annular band-shaped (or spiral band-shaped) non-magnetically permeable materials 228 are embedded on the second abrasive disc working surface 221 to increase the magnetic resistance of the second abrasive disc working surface 221 along the axis cross-section 2210 of the second abrasive disc working surface. The magnetically permeable material of the second abrasive disk substrate 220 and the embedded annular band (or spiral band) of non-magnetically permeable material 228 are tightly connected and together form the second abrasive disk working surface 221. The thickness t, the embedding depth d and the spacing (or pitch) s of the annular band-shaped (or spiral band-shaped) non-magnetic conductive material 228 are required to meet the requirements of the second grinding disc working surface 221 on structural strength and rigidity; on the other hand, it should be ensured that the magnetic field 227 in the vicinity of the second polishing pad working surface 221 preferentially passes through the cylindrical roller 3 to be processed of ferromagnetic material which is in contact with the second polishing pad working surface 221 during polishing.
The annular magnetic structure 226 inside the second grinding disc substrate may be an electromagnetic structure or an electrically controlled permanent magnetic structure.
The magnetic conductive material is a soft magnetic material with higher magnetic permeability, such as soft iron, low carbon steel, soft magnetic alloy, etc., and the non-magnetic conductive material 228 is a non-ferromagnetic material, such as a colored metal, austenitic stainless steel, etc.
The invention also provides grinding equipment for finishing the rolling surface of the cylindrical roller made of ferromagnetic materials, which comprises a main machine, a roller circulation disc external system and the magnetic grinding disc suite 2, as shown in figure 7.
The main machine comprises a base 11, upright posts 12, a cross beam 13, a sliding table 14, an upper tray 15, a lower tray 16, an axial loading device 17 and a main shaft device 18.
The base 11, the upright 12 and the cross beam 13 form a frame of the host.
The first grinding disc 21 of the magnetic grinding disc set 2 is connected with the lower tray 16, and the second grinding disc 22 of the magnetic grinding disc set 2 is connected with the upper tray 15.
The spindle device 18 is mounted on the slide table 14 and drives the second grinding disc 22 to rotate around its axis by means of an upper tray 15 connected thereto. The lower tray 16 is mounted on the base 11, and the first grinding tray 21 and the lower tray 16 do not rotate. An electrically conductive slip ring is mounted on the spindle of the spindle device 18 for driving the second polishing disc 22 to rotate, for supplying power to the annular magnetic structure 226 inside the second polishing disc base in a rotated state.
The sliding table 14 is connected to the cross beam 13 via the axial loading device 17. The upright 12 may also act as a guide member to provide a guide for the linear movement of the table 14 along the second abrasive disk axis 223. The sliding table 14 is driven by the axial loading device 17 to linearly move along the second grinding disc axis 223 along with the main shaft device 18 thereon, the upper tray 15 connected with the main shaft device 18, and the second grinding disc 22 connected with the upper tray 15 under the constraint of the upright post 12 or other guiding components.
As shown in fig. 8 and 9, the roller circulation off-disc system includes a roller collection mechanism 41, a roller demagnetizing device 42, a roller conveying finishing system 43, and a roller feed mechanism 45.
The roller collecting mechanism 41 is provided at each of the linear groove outlets 21119 of the first grinding disk for collecting the cylindrical rollers 3 to be processed which leave the grinding processing area from each of the linear groove outlets 21119.
The roller conveying and sorting system 43 is used for conveying the cylindrical rollers 3 to be processed from the roller collecting mechanism 41 to the roller feeding mechanism 45 and adjusting the axis 31 of the cylindrical rollers to be processed to the direction required by the roller feeding mechanism 45.
Each linear groove 2111 of the first grinding wheel is provided with a roller feeding mechanism 45, and the roller feeding mechanism 45 is respectively installed at each linear groove inlet 21118 of the first grinding wheel and is used for pushing the cylindrical roller 3 to be processed into each linear groove inlet 21118 of the first grinding wheel and providing pushing force for the linear feeding motion of the cylindrical roller 3 to be processed along each linear groove base line 21116.
As shown in fig. 9, the second polishing pad 22 rotates around its axis during polishing; the slide table 14 approaches the first grinding wheel 21 along the second grinding wheel axis 223 with the upper tray 15 connected thereto and the second grinding wheel 22 connected thereto under the constraint of the upright 12 or other guide member, and applies working pressure to the cylindrical rollers 3 to be processed distributed in the respective linear grooves 2111 of the first grinding wheel.
The roller feed mechanism 45 has a roller feed channel 451 disposed therein, and at either linear channel entrance 21118, a roller feed channel locating surface 4511 is a continuation of the linear channel work surface 21111 within the roller feed mechanism 45. During the process of entering the machined cylindrical roller 3 into the linear groove inlet 21118, the axis 31 of the machined cylindrical roller 3 coincides with the linear groove base line 21116 with the positioning support of the roller feed passage positioning surface 4511. The processed cylindrical roller 3 enters the linear groove inlet 21118 of the first grinding disk by pushing of the roller feed mechanism 45 via the roller feed passage 451.
On the one hand, the cylindrical roller 3 to be processed continuously rotates around its own axis 31 under the drive of the sliding friction driving torque of the second grinding disc working face 221; on the other hand, the cylindrical roller 3 to be processed continuously enters the grinding area from each linear groove inlet 21118 of the first grinding disk by the roller feeding mechanism 45, moves in a linear feed along the linear groove base line 21116, passes through the linear groove 2111, and leaves the grinding area from each linear groove outlet 21119 of the first grinding disk, thereby completing one grinding process. The cylindrical rollers 3 leaving the grinding area enter the grinding area from the linear groove inlets 21118 of the first grinding disc sequentially under the action of the roller feeding mechanism 45 again after the original sequence is disturbed through the roller collecting mechanism 41, the roller demagnetizing device 42 and the roller conveying and arranging system 43, and the whole grinding process is repeated continuously until the surface quality, the shape precision and the size consistency of the rolling surface 32 of the cylindrical rollers to be processed meet the technical requirements, and the finishing process is finished.
As shown in fig. 9, during the polishing process, the cylindrical rollers 3 to be processed enter the polishing region from the respective linear groove inlets 21118 of the first polishing plate, leave the polishing region from the respective linear groove outlets 21119 of the first polishing plate, and enter the respective linear groove inlets 21118 of the first polishing plate sequentially through the roller collecting mechanism 41, the roller conveying and finishing system 43 and the roller feeding mechanism 45 from the respective linear groove outlets 21119 of the first polishing plate, thereby forming a cycle of linear feeding of the cylindrical rollers 3 to be processed between the first polishing plate 21 and the second polishing plate 22 along the linear groove base line 21116 and collecting, conveying, finishing and feeding through the roller circulating system outside the polishing plate. The path of the circulation outside the magnetic grinding disc kit 2 is from each linear groove outlet 21119 of the first grinding disc, sequentially through the roller collection mechanism 41, the roller conveying finishing system 43 and the roller feeding mechanism 45, and into each linear groove inlet 21118 of the first grinding disc, and the path is defined as a roller circulation disc outer path.
As shown in fig. 8 and 9, the roller demagnetizing device 42 is disposed in the roller conveying finishing system 43 in the outer path of the roller circulation disk or before the roller conveying finishing system 43 for demagnetizing the processed cylindrical rollers 3 of ferromagnetic material magnetized by the magnetic field of the annular magnetic structure 226 inside the second grinding disk base body so as to avoid agglomeration of the processed cylindrical rollers 3 of ferromagnetic material when passing through the roller conveying finishing system 43.
As shown in fig. 6 (a) and 6 (b) and 7, during the polishing process, the magnetic field strength of the annular magnetic structure 226 is adjusted to form a sufficiently strong magnetic field 227 near the second polishing disc working surface 221, and the second polishing disc working surface 221 generates a sufficiently strong magnetic attraction force on the cylindrical roller 3 to be processed made of ferromagnetic material, so that the sliding friction driving moment generated by the rotation of the second polishing disc working surface 221 on the cylindrical roller 3 to be processed made of ferromagnetic material around the self axis 31 is larger than the sliding friction resistance moment generated by the rotation of the linear groove working surface 21111 of the first polishing disc on the cylindrical roller 3 to be processed made of ferromagnetic material around the self axis 31, thereby driving the cylindrical roller 3 to be processed to continuously rotate around the self axis 31.
When the annular magnetic structure 226 in the second polishing disc substrate is in a non-operating state, the magnetic field near the second polishing disc working surface 221 is lost or weakened, and the magnetic attraction force generated by the second polishing disc working surface 221 on the machined cylindrical roller 3 made of ferromagnetic material is lost or weakened.
In the implementation of the invention, a free abrasive grain grinding mode or a fixed abrasive grain grinding mode can be adopted.
The linear groove work surface 21111 of the first abrasive disk is made of a bonded abrasive grain material when it is being ground with bonded abrasive grains.
It will be appreciated that the features described above and below may be used not only in combination as described in the examples, but also in other combinations or alone without exceeding the scope of the invention.
When the grinding equipment is adopted to grind the rolling surface of the cylindrical roller made of ferromagnetic materials, the grinding method comprises the following steps:
step one, the second grinding disc is driven to approach the first grinding disc along the axis thereof until the rolling surface 32 of the cylindrical roller to be processed in the grinding processing area approaches to be in surface contact with the linear groove working surface 21111 of the first grinding disc and in line contact with the second grinding disc working surface 21, namely, the space of each grinding processing area formed by the linear groove working surface 21111 of the first grinding disc and the second grinding disc working surface 221 can be used for accommodating only one row of cylindrical rollers 3 to be processed along the direction of the linear groove base line 21116.
And step two, driving the second grinding disc 22 to rotate at a low speed relative to the first grinding disc 21 around the axis of the second grinding disc, wherein the rotation speed is 1-10 rpm according to the outer diameter size of the second grinding disc 22.
Step three, starting a roller demagnetizing device 42, a roller conveying and finishing system 43 and a roller feeding mechanism 45; the conveying speed and the finishing speed of the roller conveying finishing system 43 are adjusted to be matched with the conveying speed of the roller conveying mechanism 45, so that the cylindrical rollers 3 to be processed continuously enter the grinding processing area from each linear groove inlet 21118 of the first grinding disc under the action of the roller conveying mechanism 45, do linear feeding motion along the linear groove base line 21116, pass through the linear groove 2111 and leave the grinding processing area from each linear groove outlet 21119 of the first grinding disc through the roller conveying finishing system; the cylindrical rollers 3 leaving the grinding processing area are sequentially introduced into the grinding processing area from the linear groove inlets 21118 of the first grinding disk again under the action of the roller feed mechanism 45 after the original sequence is disturbed through the roller collecting mechanism 41, the roller demagnetizing device 42 and the roller conveying and sorting system 43, so that the linear feeding of the cylindrical rollers 3 between the first grinding disk 21 and the second grinding disk 22 along the linear groove base line 21116 and the collection, conveying, sorting and feeding cycle through the roller circulating off-disk system are established.
Fourth, the rotation speed of the second grinding disc 22 is adjusted to the working rotation speed, the feeding speed of the roller feeding mechanism 45 is adjusted to the working feeding speed according to the working rotation speed of 15-60 rpm of the outer diameter size of the second grinding disc 22 to match the working rotation speed of the second grinding disc 22, and the conveying speed and the finishing speed of the roller conveying finishing system 43 are adjusted, so that the stock of the cylindrical rollers 3 to be processed in the outer system of the roller circulating disc, the roller conveying finishing system 43 and the roller feeding mechanism 45 are matched and circulated smoothly and orderly.
And fifthly, filling grinding liquid into the grinding processing area.
Step six, the annular magnetic structure 226 in the second grinding disc matrix enters a working state; the second grinding wheel 22 is further moved toward the first grinding wheel 21 along its axis so that the rolling surfaces 32 of the machined cylindrical rollers in the grinding processing area are brought into surface contact with the linear groove work surfaces 21111 of the first grinding wheel and into line contact with the second grinding wheel work surfaces 221, respectively, and an initial working pressure is applied to the machined cylindrical rollers 3 distributed in the grinding processing area, the initial working pressure being 0.5 to 2N per machined cylindrical roller on average, depending on the diameter size of the machined cylindrical rollers 3. The magnetic field intensity of the annular magnetic structure 226 is adjusted so that the sliding friction driving moment generated by the rotation of the working surface 221 of the second grinding disc on the cylindrical roller 3 which is made of ferromagnetic material around the self axis 31 is larger than the sliding friction resistance moment generated by the rotation of the working surface 21111 of the linear groove of the first grinding disc on the cylindrical roller 3 which is made of ferromagnetic material around the self axis 31, thereby driving the cylindrical roller 3 which is made of ferromagnetic material to continuously rotate around the self axis 31; at the same time, the cylindrical roller 3 to be processed makes a linear feed motion along the linear groove base line 21116 of the first grinding disk by the roller feed mechanism 45. The rolling surface 32 of the machined cylindrical roller starts to undergo the grinding process of the linear groove work surface 21111 of the first grinding disk and the second grinding disk work surface 221.
And step seven, along with stable operation of the grinding processing process, gradually increasing the working pressure of the cylindrical rollers 3 to be processed distributed in the grinding processing area to the normal working pressure, and averaging 2-50N of each cylindrical roller to be processed according to the diameter size of the cylindrical rollers 3 to be processed. The cylindrical roller 3 to be processed maintains the contact relation with the linear groove work surface 21111 of the first grinding disk and the second grinding disk work surface 221 of step six, the continuous rotational movement about the own axis 31, and the linear feeding movement along the linear groove base line 21116 of the first grinding disk, and its rolling surface 32 continues to undergo the grinding process of the linear groove work surface 21111 of the first grinding disk and the second grinding disk work surface 221.
Step eight, performing spot check on the cylindrical roller 3 to be processed after a period of grinding cycle according to different grinding processes; when the surface quality, shape accuracy and dimensional consistency of the rolling surface 32 of the machined cylindrical roller to be subjected to the spot inspection do not meet the technical requirements, continuing the grinding machining of the step; when the surface quality, shape accuracy and dimensional uniformity of the rolling surface 32 of the machined cylindrical roller to be spot inspected meet the specifications, step nine is entered.
Step nine, gradually reducing the working pressure and finally reaching zero; stopping the operation of the roller conveying finishing system 43 and the roller feeding mechanism 45, and adjusting the rotation speed of the second grinding disc 2 to zero; the annular magnetic structure 226 is switched to a non-working state to stop the roller demagnetizing device 42; stopping filling the grinding processing area with the grinding liquid; the second abrasive disk 22 is driven back along its axis to the rest position. The cylindrical rollers 3 to be processed everywhere in the cycle are collected, and the grinding process ends.
It will be appreciated that the steps and sequences described above may be combined not only as described in the examples, but also in other combinations without departing from the scope of the invention.
The linear groove working surface 21111 of the first grinding disk and the second grinding disk working surface 221 which are processed by the parameter design for the specific cylindrical roller 3 to be processed inevitably have manufacturing errors, and the first grinding disk 21 and the second grinding disk 22 also have installation errors when installed on the grinding apparatus. These manufacturing errors and mounting errors may cause a difference in contact state of the machined cylindrical roller 3 with the linear groove work surface 21111 of the first grinding disk and the second grinding disk work surface 221 at the time of grinding processing from ideal.
In order to reduce such a difference, it is recommended that the linear groove working surface 21111 of the first polishing disk and the second polishing disk working surface 221 be run-in by the cylindrical rollers 3 to be processed of ferromagnetic material of the same geometric parameters before the first polishing disk 21 and the second polishing disk 22 are used for the first time. The running-in method is the same as the grinding method of the cylindrical roller 3 to be processed; performing spot check on the machined cylindrical roller 3 which participates in running-in, and when the surface quality, shape precision and size consistency of the rolling surface 32 of the machined cylindrical roller of the spot check reach technical requirements, entering a running-in process into a step nine, and finishing running-in; otherwise, continuing to step eight.
The magnetic grinding disc kit, the grinding equipment and the grinding method provided by the invention are not limited to the finish machining of the rolling surface of the cylindrical roller made of ferromagnetic materials, but can be also used for the finish machining of the outer diameter surface of the cylindrical part made of ferromagnetic materials with the straight plain line characteristic of the cylindrical roller, such as a rolling pin, and the like, and the range of the magnetic grinding disc kit, the grinding equipment and the grinding method is not beyond the range of the invention.

Claims (6)

1. A magnetic grinding disc kit for finishing a cylindrical roller rolling surface of ferromagnetic material, comprising a pair of coaxial first grinding discs (21) and second grinding discs (22), the front faces (211) of the first grinding discs being arranged opposite to the front faces of the second grinding discs, characterized in that:
The first grinding disc front surface (211) comprises a group of radial linear grooves (2111) and transition surfaces (2112) connecting adjacent linear grooves;
a linear groove working surface (21111) which is in contact with a rolling surface (32) of a cylindrical roller (3) to be processed during grinding is formed on a linear groove scanning surface (21113), and the linear groove scanning surface (21113) is a constant cross-section scanning surface; the scanning path of the linear groove scanning surface (21113) is a straight line, and a generatrix of the linear groove scanning surface (21113) is in a linear groove normal section (21114); in the straight-line groove normal section (21114), the normal section outline (211131) of the straight-line groove scanning surface (21113) is an arc of which the radius of curvature is equal to that of the rolling surface (32) of the cylindrical roller to be processed;
-a scanning path of the linear groove scanning surface (21113) passes through a center of curvature of the normal cross-sectional profile (211131), the scanning path being a linear groove baseline (21116); all the linear groove base lines (21116) are distributed on a right circular conical surface, the right circular conical surface is a first grinding disc base surface (214), the axis of the first grinding disc base surface (214) is a first grinding disc axis (213), and the cone apex angle of the first grinding disc base surface (214) is ；
The linear groove base line (21116) is in a first grinding disc shaft section (215), and the first grinding disc shaft section (215) containing the linear groove base line (21116) is a central plane (21112) of the linear groove working surface (21111); placing the cylindrical roller (3) to be processed as a reference object in the linear groove (2111), and enabling the rolling surface (32) of the cylindrical roller to be processed to be in surface contact with the linear groove working surface (21111), wherein the axis (31) of the cylindrical roller to be processed is in the central plane (21112) of the linear groove working surface (21111), and the axis (31) of the cylindrical roller to be processed is overlapped with the linear groove base line (21116);
the front surface of the second grinding disc is a right conical surface and is also a second grinding disc working surface (221), the axis of the second grinding disc working surface (221) is a second grinding disc axis (223), and the cone apex angle of the second grinding disc working surface (221) isAnd:
；
when (when)When the first grinding disc axis (213) is perpendicular to the first grinding disc base surface (214), the second grinding disc axis (223) is perpendicular to the second grinding disc working surface (221), and there is a case that the linear groove base line (21116) is not within the first grinding disc shaft section (215) in addition to the linear groove base line (21116) being within the first grinding disc shaft section (215); when the linear groove baseline (21116) is not within the first grinding disk shaft section (215), the central plane (21112) of the linear groove working surface (21111) is a plane containing the linear groove baseline (21116) and parallel to the first grinding disk axis (213);
The second grinding disc base body (220) is made of magnetic conduction materials, an annular magnetic structure (226) is embedded in the second grinding disc base body (220), and a group of annular band-shaped or spiral band-shaped non-magnetic conduction materials (228) are embedded on the second grinding disc working surface (221); the magnetic conductive material of the second grinding disc substrate (220) and the embedded annular band-shaped or spiral band-shaped non-magnetic conductive material (228) are tightly connected and jointly form the second grinding disc working surface (221).
2. A magnetic abrasive disc kit for finishing a cylindrical roller rolling surface of ferromagnetic material according to claim 1, characterized in that each linear groove inlet (21118) of the first abrasive disc is located at the outer edge of the first abrasive disc (21), each linear groove outlet (21119) of the first abrasive disc is located at the inner edge of the first abrasive disc (21); or each linear groove inlet (21118) of the first grinding disc is positioned at the inner edge of the first grinding disc (21), and each linear groove outlet (21119) of the first grinding disc is positioned at the outer edge of the first grinding disc (21).
3. Grinding equipment for finishing the rolling surface of a cylindrical roller of ferromagnetic material, characterized by comprising a main machine, a roller circulation off-disc system and a magnetic grinding disc kit (2) for finishing the rolling surface of a cylindrical roller of ferromagnetic material according to claim 2;
The host comprises a base (11), an upright post (12), a cross beam (13), a sliding table (14), an upper tray (15), a lower tray (16), an axial loading device (17) and a main shaft device (18);
the base (11), the upright posts (12) and the cross beams (13) form a frame of the host;
the first grinding disc (21) of the magnetic grinding disc kit (2) is connected with the lower tray (16), and the second grinding disc (22) of the magnetic grinding disc kit (2) is connected with the upper tray (15);
the main shaft device (18) is arranged on the sliding table (14), and drives the second grinding disc (22) to rotate around the axis of the second grinding disc through the upper tray (15) connected with the main shaft device; the lower tray (16) is mounted on the base (11);
the sliding table (14) is connected with the cross beam (13) through the axial loading device (17); the upright (12) can serve as a guide component to provide a guide function for the sliding table (14) to move linearly along the second grinding disc axis (223); the sliding table (14) is driven by the axial loading device (17), and is constrained by the upright (12) or other guide components to linearly move along the second grinding disc axis (223) along with a main shaft device (18) on the sliding table, an upper tray (15) connected with the main shaft device (18) and a second grinding disc (22) connected with the upper tray (15);
The roller circulation off-disc system comprises a roller collecting mechanism (41), a roller demagnetizing device (42), a roller conveying and arranging system (43) and a roller feeding mechanism (45);
the roller collecting mechanism (41) is arranged at each linear groove outlet (21119) of the first grinding disc and is used for collecting the cylindrical rollers (3) to be processed, which leave the grinding processing area surrounded by the linear groove working surface (21111) of the first grinding disc and the second grinding disc working surface (221) from each linear groove outlet (21119);
the roller conveying and arranging system (43) is used for conveying the processed cylindrical rollers (3) from the roller collecting mechanism (41) to the roller feeding mechanism (45) and adjusting the axis (31) of the processed cylindrical rollers to the direction required by the roller feeding mechanism (45);
the processed cylindrical rollers (3) sequentially pass through the roller collecting mechanism (41), the roller conveying and sorting system (43) and the roller feeding mechanism (45) from each linear groove outlet (21119) of the first grinding disc, and the path entering each linear groove inlet (21118) of the first grinding disc is a roller circulation disc outer path; the roller demagnetizing device (42) is arranged in the roller conveying and finishing system (43) in the outer path of the roller circulating disc or before the roller conveying and finishing system (43) and is used for demagnetizing the processed cylindrical roller (3) of ferromagnetic material magnetized by the magnetic field of the annular magnetic structure (226) in the second grinding disc matrix;
The roller feeding mechanism (45) is respectively arranged at each linear groove inlet (21118) of the first grinding disc and is used for pushing the processed cylindrical roller (3) into each linear groove inlet (21118) of the first grinding disc and providing thrust for the linear feeding movement of the processed cylindrical roller (3) along each linear groove base line (21116);
during grinding, the second grinding disc (22) rotates around the axis; the sliding table (14) approaches the first grinding disc (21) along the second grinding disc axis (223) under the constraint of the upright (12) or other guide components, along with an upper tray (15) connected with the sliding table and a second grinding disc (22) connected with the upper tray, and applies working pressure to the processed cylindrical rollers (3) distributed in the linear grooves (2111) of the first grinding disc.
4. A grinding apparatus for finishing a cylindrical roller rolling surface of a ferromagnetic material according to claim 3, wherein during the grinding process, by adjusting the magnetic field strength of the annular magnetic structure (226) inside the second grinding disk base body in the magnetic grinding disk assembly (2), the sliding friction driving moment generated by the second grinding disk working face (221) for rotating the cylindrical roller (3) of the ferromagnetic material around the own axis (31) is larger than the sliding friction resistance moment generated by the linear groove working face (21111) of the first grinding disk for rotating the cylindrical roller (3) of the ferromagnetic material around the own axis (31), thereby driving the cylindrical roller (3) of the ferromagnetic material to continuously rotate around the own axis (31).
5. A grinding method for finishing a cylindrical roller rolling surface of a ferromagnetic material, characterized by using the grinding apparatus for finishing a cylindrical roller rolling surface of a ferromagnetic material as set forth in claim 3 or 4, and comprising the steps of:
the first step, the second grinding disc (22) approaches to the first grinding disc (21) along the axis of the second grinding disc until the space of each grinding processing area formed by the surrounding of the linear groove working surface (21111) of the first grinding disc and the working surface (221) of the second grinding disc can only accommodate a row of cylindrical rollers (3) to be processed along the direction of the linear groove base line (21116);
step two, the second grinding disc (22) rotates around the axis of the second grinding disc at a low speed of 1-10 rpm relative to the first grinding disc (21);
step three, starting a roller demagnetizing device (42), a roller conveying and tidying system (43) and a roller feeding mechanism (45); adjusting the conveying speed and the finishing speed of the roller conveying and finishing system (43) to be matched with the feeding speed of the roller feeding mechanism (45); thereby establishing a linear feeding of the processed cylindrical roller (3) between the first grinding disc (21) and the second grinding disc (22) along the linear groove base line (21116) and a cycle of collecting, conveying, arranging and feeding through a roller cycle off-disc system;
Step four, adjusting the rotation speed of the second grinding disc (22) to 15-60 rpm working rotation speed, adjusting the feeding speed of the roller feeding mechanism (45) to the working feeding speed to be matched with the working rotation speed of the second grinding disc (22), and adjusting the conveying speed and the finishing speed of the roller conveying finishing system (43) to ensure that the stock of the processed cylindrical rollers (3) in the outer system of the roller circulating disc is matched with the stock of the processed cylindrical rollers (41), the roller conveying finishing system (43) and the roller feeding mechanism (45) in sequence smoothly;
fifthly, filling grinding liquid into the grinding processing area;
step six, the annular magnetic structure (226) in the second grinding disc matrix enters a working state; the second grinding disc (22) is further approaching to the first grinding disc (21) along the axis of the second grinding disc, so that the rolling surface (32) of the cylindrical rollers to be processed in the grinding processing area is respectively in surface contact with the linear groove working surface (21111) of the first grinding disc and in line contact with the working surface (221) of the second grinding disc, and an initial working pressure of 0.5-2N is applied to each cylindrical roller to be processed distributed in the grinding processing area according to the average of each cylindrical roller to be processed; the magnetic field intensity of the annular magnetic structure (226) is adjusted, so that the sliding friction driving moment generated by the rotation of the working surface (221) of the second grinding disc on the processed cylindrical roller (3) made of ferromagnetic materials around the self axis (31) is larger than the sliding friction resistance moment generated by the rotation of the working surface (21111) of the linear groove of the first grinding disc on the processed cylindrical roller (3) made of ferromagnetic materials around the self axis (31), and the processed cylindrical roller (3) made of ferromagnetic materials is driven to continuously rotate around the self axis (31); simultaneously, the cylindrical roller (3) to be processed performs linear feeding motion along a linear groove base line (21116) of the first grinding disc under the pushing action of a roller feeding mechanism (45); whereby the rolling surface (32) of the cylindrical roller to be processed starts to undergo the grinding processing of the linear groove working surface (21111) of the first grinding disk and the second grinding disk working surface (221);
Step seven, along with stable operation of the grinding process, gradually increasing the working pressure of each cylindrical roller (3) to be processed distributed in the grinding processing area H to the normal working pressure of 2-50N; the cylindrical roller (3) to be processed maintains the contact relation between the linear groove working surface (21111) of the first grinding disc and the second grinding disc working surface (221) of the sixth step, the continuous rotation motion around the own axis (31) and the linear feeding motion along the linear groove base line (21116), and the rolling surface (32) thereof continuously undergoes the grinding processing of the linear groove working surface (21111) of the first grinding disc and the second grinding disc working surface (221);
step eight, after a period of grinding cycle, performing spot check on the processed cylindrical roller (3); when the surface quality, shape precision and size consistency of the rolling surface (32) of the processed cylindrical roller to be subjected to the spot inspection do not meet the technical requirements, continuing the grinding processing of the step; when the surface quality, the shape precision and the size consistency of the rolling surface (32) of the processed cylindrical roller to be subjected to the spot inspection meet the technical requirements, entering a step nine;
step nine, gradually reducing the working pressure and finally reaching zero; stopping the operation of the roller conveying and finishing system (43) and the roller feeding mechanism (45), and adjusting the rotating speed of the second grinding disc (22) to zero; the annular magnetic structure (226) is switched to a non-working state, and the roller demagnetizing device (42) is stopped; stopping filling the grinding processing area with the grinding liquid; the second abrasive disk (22) is retracted along its axis back into the inactive position; and finishing the grinding processing.
6. The grinding method for finishing the rolling surface of the cylindrical roller made of ferromagnetic material according to claim 5, characterized in that before the first grinding disc (21) and the second grinding disc (22) are used for the first time, the linear groove working surface (21111) of the first grinding disc and the second grinding disc working surface (221) are ground by the cylindrical roller (3) made of ferromagnetic material with the same geometric parameters; the running-in method is the same as the grinding method of the cylindrical roller (3) to be processed; performing spot check on the machined cylindrical roller (3) which participates in running-in, and when the surface quality, shape precision and size consistency of the rolling surface (32) of the machined cylindrical roller subjected to spot check meet the technical requirements, entering a running-in process into a step nine, and finishing running-in; otherwise, continuing to step eight.
CN201810850351.XA 2018-07-28 2018-07-28 Magnetic grinding disc, equipment and method for finishing rolling surface of cylindrical roller Active CN108890403B (en)

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JP2001025948A (en) * 1999-07-16 2001-01-30 Noritake Co Ltd Spherical grinding wheel
US6210259B1 (en) * 1999-11-08 2001-04-03 Vibro Finish Tech Inc. Method and apparatus for lapping of workpieces
CN101504036A (en) * 2008-10-30 2009-08-12 惠志强 Manufacture equipment and process for roller bearing spherical roller
CN102476350A (en) * 2010-11-29 2012-05-30 瓦房店鹏东轴承制造有限公司 Grinding processing device for cylindrical roller
CN209394483U (en) * 2018-07-28 2019-09-17 天津大学 Magnetically grinding disk and equipment for the finishing of cylindrical roller rolling surface

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202356A (en) * 1922-04-11 1923-08-13 Karl Oskar Leon Improvements in and relating to the manufacture of rollers for roller bearings
JP2001025948A (en) * 1999-07-16 2001-01-30 Noritake Co Ltd Spherical grinding wheel
US6210259B1 (en) * 1999-11-08 2001-04-03 Vibro Finish Tech Inc. Method and apparatus for lapping of workpieces
CN101504036A (en) * 2008-10-30 2009-08-12 惠志强 Manufacture equipment and process for roller bearing spherical roller
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CN209394483U (en) * 2018-07-28 2019-09-17 天津大学 Magnetically grinding disk and equipment for the finishing of cylindrical roller rolling surface

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