CN114770380A - Bearing machining control method and method for determining grinding wheel feeding amount - Google Patents

Bearing machining control method and method for determining grinding wheel feeding amount Download PDF

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Publication number
CN114770380A
CN114770380A CN202210425353.0A CN202210425353A CN114770380A CN 114770380 A CN114770380 A CN 114770380A CN 202210425353 A CN202210425353 A CN 202210425353A CN 114770380 A CN114770380 A CN 114770380A
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groove
grinding wheel
curvature
distance
longitudinal
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CN114770380B (en
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尹延经
徐润润
韩涛
李文超
张振强
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Luoyang Bearing Research Institute Co Ltd
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Luoyang Bearing Research Institute Co Ltd
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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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/06—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding races, e.g. roller races
    • 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
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

The invention relates to a control method for bearing processing and a method for determining the feed amount of a grinding wheel, belonging to the technical field of bearing processing; a triangle is formed by equivalence of the groove curvature center, the groove curvature radius and the lock notch height in the primary processing process of bearing processing, and the transverse distance from the groove curvature center to the lock notch in the primary processing is calculated; a triangle is formed by equivalence of the height of the locking notch, the curvature center of the groove for the secondary processing of the preset bearing and the curvature radius of the groove, and the longitudinal distance from the curvature center of the groove for the secondary processing to the locking notch is calculated; and then calculating the longitudinal feeding amount of the grinding wheel according to the longitudinal distance from the groove curvature center of the secondary processing to the locking notch and the groove curvature radius of the primary processing. The invention can directly determine the longitudinal feeding of the grinding wheel according to the groove curvature radius of the primary processing, the height of the locking notch, the preset groove curvature radius of the secondary processing and the transverse feeding amount of the grinding wheel for processing, and ensures that the cross section of the processed groove is in a complete arc curve so as to reduce the workload of the grinding process.

Description

Control method for bearing machining and method for determining feed amount of grinding wheel
Technical Field
The invention relates to a control method for bearing machining and a method for determining the feed amount of a grinding wheel, and belongs to the technical field of bearing machining.
Background
In the bearing processing process, the channel grinding is an important link in the bearing processing process. The machining of the channel grinding is not completed in one step, secondary grinding is often needed, and multiple times of grinding are beneficial to reducing the deformation in the bearing machining process. However, during the secondary grinding, the channel position and the groove curvature radius cannot be completely consistent with the previous parameters, so that the phenomenon that the channel position and the groove curvature radius are changed is inevitable, and as a result, the cross-sectional shape of the channel is not a complete circular arc curve, but two or more circular arc curves. Further grinding is required to ensure that the channel section is shaped as a complete circular arc curve, which results in increased grinding workload.
Disclosure of Invention
The invention aims to provide a bearing machining control method and a method for determining the feed amount of a grinding wheel, which are used for solving the problem of workload increase caused by the existence of multiple sections of circular arcs in the secondary channel grinding process.
In order to achieve the purpose, the scheme and the beneficial effects of the invention comprise:
the invention discloses a method for determining the feed amount of a grinding wheel in bearing processing, which comprises the following steps:
1) acquiring a first groove curvature radius, a lock notch high point position and a first groove curvature center of a bearing during primary processing;
2) the transverse distance from the curvature center of the first groove to the high point of the locking notch is taken as a first transverse distance, and the longitudinal distance from the curvature center of the first groove to the high point of the locking notch is taken as a first longitudinal distance; determining a first longitudinal distance according to the curvature radius of the first groove and the position of the high point of the locking notch, and determining a first transverse distance according to the first longitudinal distance and the curvature radius of the first groove;
3) acquiring the curvature radius of a second groove of the bearing to be machined, which is subjected to secondary machining after primary machining, and acquiring the transverse feeding amount of the grinding wheel when the bearing to be machined is subjected to secondary machining; presetting a second groove curvature center of the bearing to be machined, wherein the transverse distance from the second groove curvature center to the high point of the locking notch is a second transverse distance, and the longitudinal distance from the second groove curvature center to the high point of the locking notch is a second longitudinal distance; determining a second transverse distance according to the first transverse distance and the transverse feeding amount of the grinding wheel, and determining a second longitudinal distance according to the second transverse distance and the curvature radius of the second groove;
4) and (3) enabling the position of the lock notch high point during the secondary processing to coincide with the position of the lock notch high point during the primary processing, and calculating the difference value between the first longitudinal distance and the second longitudinal distance, wherein the difference value is the longitudinal feeding amount of the grinding wheel.
The beneficial effects of the above technical scheme are: the method for determining the grinding wheel feed amount during bearing machining provided by the invention directly determines the longitudinal feed amount of the grinding wheel according to the groove curvature radius of primary machining, the locking notch high point, the preset groove curvature radius of secondary machining and the transverse feed amount of the grinding wheel. And calculating the longitudinal feeding amount of the grinding wheel under the condition that the high points of the locking notch of the primary processing and the locking notch of the secondary processing are the same, and carrying out secondary processing on the bearing by using the longitudinal feeding amount to completely grind off the section of the channel of the primary processing, so that the section of the channel of the secondary processing is in a complete arc curve, and the workload of the grinding process is reduced.
Further, in the step 2), the first lateral distance is calculated by the following formula:
Figure BDA0003608273930000021
wherein l1Is a first transverse distance, R1Is the radius of curvature of the first groove, t1Is the height of the locking notch.
The beneficial effects of the above technical scheme are: the quantitative relation among the first transverse distance, the first groove curvature radius and the locking notch height during one-time processing is established through the triangular pythagorean theorem, and the calculation is simpler and quicker.
Further, in the step 3), the second longitudinal distance is calculated by the following formula:
Figure BDA0003608273930000022
wherein l2Is a second longitudinal distance, R2Is the radius of curvature of the second groove, R1Is the radius of curvature of the first groove, t1And a is the transverse feeding amount of the grinding wheel, namely the height of the locking notch.
The beneficial effects of the above technical scheme are: the quantitative relation among the second longitudinal distance, the second groove curvature and the fore shaft height during secondary processing is established through the triangular pythagorean theorem, and the longitudinal distance from the groove curvature center to the fore shaft height during secondary processing can be rapidly calculated.
Further, the longitudinal feeding amount of the grinding wheel is calculated by the following formula:
Figure BDA0003608273930000023
wherein b is the longitudinal feed of the grinding wheel.
The beneficial effects of the above technical scheme are: the acquired workpiece parameters of primary processing and the preset workpiece parameters of secondary processing are input into a mathematical expression for calculating the longitudinal feeding amount, and the longitudinal feeding amount of the grinding wheel during secondary processing can be accurately obtained only by simple mathematical calculation, so that the calculation is simple, and the workload of bearing processing is greatly reduced.
Further, determining a first groove bottom diameter according to the first groove curvature radius, and determining a second groove bottom diameter according to the second groove curvature radius; calculating the difference value of the first groove bottom diameter and the second groove bottom diameter according to the longitudinal feeding amount of the grinding wheel by the following formula:
Δ＝2(b+R2-R1)
wherein Δ is the difference between the first trench bottom diameter and the second trench bottom diameter.
The invention also provides a bearing machining control method, which comprises the following steps:
a, acquiring a first groove curvature radius, a lock notch high point position and a first groove curvature center of a bearing during primary processing;
b, taking the transverse distance from the curvature center of the first groove to the high point of the lock opening as a first transverse distance, and taking the longitudinal distance from the curvature center of the first groove to the high point of the lock opening as a first longitudinal distance; determining a first longitudinal distance according to the curvature radius of the first groove and the position of the high point of the locking notch, and determining a first transverse distance according to the first longitudinal distance and the curvature radius of the first groove;
c, acquiring the curvature radius of a second groove of the bearing to be machined after primary machining and secondary machining, and acquiring the transverse feeding amount of the grinding wheel when the bearing to be machined is machined again; presetting a second groove curvature center of the bearing to be processed, wherein the transverse distance from the second groove curvature center to the high point of the locking notch is a second transverse distance, and the longitudinal distance from the second groove curvature center to the high point of the locking notch is a second longitudinal distance; determining a second transverse distance according to the first transverse distance and the transverse feeding amount of the grinding wheel, and determining a second longitudinal distance according to the second transverse distance and the curvature radius of the second groove;
d, enabling the position of the high point of the locking notch in the secondary machining to coincide with the position of the high point of the locking notch in the primary machining, and calculating the difference between the first longitudinal distance and the second longitudinal distance, wherein the difference is the longitudinal feeding amount of the grinding wheel;
and E, controlling the grinding wheel to machine the bearing according to the longitudinal feeding amount and the transverse feeding amount of the grinding wheel, judging whether the machined bearing channel reaches the set machining standard or not after machining again, and repeating the steps A to D to machine again if the machined bearing channel does not reach the set machining standard.
The beneficial effects of the above technical scheme are: the control method for bearing machining provided by the invention directly determines the longitudinal feed amount of the grinding wheel according to the groove curvature radius of primary machining, the high point of the locking notch, the preset groove curvature radius of secondary machining and the transverse feed amount of the grinding wheel. And calculating the longitudinal feeding amount of the grinding wheel under the condition that the locking notch high points of the primary processing and the secondary processing are the same, and carrying out secondary processing on the bearing by using the longitudinal feeding amount to completely grind off the channel section of the primary processing so that the channel section of the secondary processing is in a complete arc curve shape to reduce the workload of the grinding process.
Further, in the step B, the first transverse distance is calculated by the following formula:
Figure BDA0003608273930000041
wherein l1Is a first transverse distance, R1Is the radius of curvature of the first groove, t1Is the height of the locking notch.
Further, in the step C, the second longitudinal distance is calculated by the following formula:
Figure BDA0003608273930000042
wherein l2Is a second longitudinal distance, R2Is the second groove radius of curvature, R1Is the radius of curvature of the first groove, t1And a is the transverse feeding amount of the grinding wheel, wherein the locking notch height is shown in the specification.
Further, the longitudinal feeding amount of the grinding wheel is calculated by the following formula:
Figure BDA0003608273930000043
wherein b is the longitudinal feed of the grinding wheel.
Further, determining a first groove bottom diameter according to the first groove curvature radius, and determining a second groove bottom diameter according to the second groove curvature radius; calculating the difference value of the first groove bottom diameter and the second groove bottom diameter according to the longitudinal feeding amount of the grinding wheel by the following formula:
Δ＝2(b+R2-R1)
wherein Δ is the difference between the first trench bottom diameter and the second trench bottom diameter.
Drawings
FIG. 1 is a schematic diagram of bearing groove change during secondary grinding in the method embodiment;
FIG. 2 is a schematic diagram illustrating the change of the displacement of the grinding wheel during the secondary grinding in the method embodiment;
FIG. 3 is a schematic diagram of the final channel state after the secondary grinding in the method embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
Method embodiment to determine the grinding wheel feed:
the invention provides a method for determining the feed amount of a grinding wheel in bearing processing, wherein during groove grinding, the groove positions and the groove curvature radii of the first grinding and the second grinding are correspondingly different, and in order to avoid the situation that the groove interface shape is not a complete arc curve caused by two times of grinding, the longitudinal feed amount of the grinding wheel is calculated when the groove positions or the groove curvature radii are changed, so that the integrity of the bearing during groove grinding is ensured, and the production can be guided in the bearing groove grinding process.
Specifically, the method for controlling the grinding amount in bearing machining provided by the invention comprises the following steps:
1) and determining the machining parameters during grinding.
As shown in fig. 1, the curve of the groove when the bearing is ground for the first time is an arc line AB; after the second grinding, the arc line CDB in the figure corresponds to the condition that the cross section of the channel is in the shape of two arc curves; and after the second grinding, the section shape of the channel is a complete arc curve corresponding to an arc line EB in the graph. Determining the groove curvature radius R of the bearing channel in the first grinding process according to the process file or the actual processing parameters1Radius of curvature R of groove at second grinding2。
2) Determining the transverse feeding amount a of the grinding wheel.
As shown in fig. 2, at the time of the second grinding, the infeed amount a of the grinding wheel is determined from the process file or the actual machining parameters.
3) And calculating the longitudinal feeding amount b of the grinding wheel.
In order to ensure the integrity of the groove shape, the grinding wheel needs to be moved longitudinally by the longitudinal feeding amount b on the basis of the previous movement. As shown in FIG. 3, the high point of the locking notch of the first grinding is B point in the figure, and the locking notch is highThe degree is the distance from the point B to the lowest point of the arc AB, namely the height of the locking opening is t1. The high point of the locking notch of the second grinding is also the point B in the figure, the height of the locking notch is the distance from the point B to the lowest point of the arc line EB, namely the height of the locking notch is t2. At the time of the first grinding, the center O of the circle is known as the center of curvature of the groove, and the radius of curvature of the groove is known; during the second grinding, the curvature radius of the groove of the second grinding is known according to engineering practice, although on the theoretical basis, under the condition that the radius is known, the curvature center of the groove of the second grinding, namely O' can be correspondingly calculated, and then the longitudinal feeding amount b of the grinding wheel can be calculated. However, calculating the center of curvature of the groove once every grinding time the grinding wheel needs to be moved brings a large amount of calculation, and is not suitable for engineering practice.
When the longitudinal feed amount b of the grinding wheel is calculated, the processing parameters during the first grinding are respectively corresponding to a geometric figure, namely Rt delta OFB. The radius of curvature R of the groove in the first grinding can be directly determined according to the processing parameters in the first grinding1And a height t of the locking notch1Therefore, in Rt Δ OFB, the length OF is the difference between the radius at the first grinding and the notch height, and the length OF OB is the value OF the groove curvature radius at the first grinding, and thus in Rt Δ OFB, the length OF BF can be calculated by the following formula according to the pythagorean theorem.
lOF＝R1-t1
lOB＝R1
Figure BDA0003608273930000061
Therefore, the temperature of the molten steel is increased,
Figure BDA0003608273930000062
during the second grinding, the transverse feeding amount a of the grinding wheel is known, so that the position of the straight line where O' G is located can be determined; the lock notch high point B during the second grinding is the same as the lock notch high point B during the first grinding, and the length of BF determined during the first grinding is usedThe position and the length of the BG can be determined; then according to the curvature radius R of the groove in the second grinding2If known, Rt Δ O 'GB can be determined, and the length of O' G can be calculated, so as to determine the longitudinal feed amount b of the grinding wheel. The longitudinal feed b calculated according to Rt Delta O' GB can ensure that the bearing channel still has a complete circular arc curve after the second grinding, namely an arc line EB. Therefore, in Rt Δ O 'GB, the length of O' G can be calculated by the following formula according to the pythagorean theorem.
lBG＝lBF+a
lO′B＝R2
Figure BDA0003608273930000063
Therefore, the temperature of the molten steel is controlled,
Figure BDA0003608273930000064
the longitudinal feed b of the grinding wheel is R1-t1-lO′GI.e. by
Figure BDA0003608273930000065
According to the longitudinal feed amount of the grinding wheel, the reduction amount delta of the new groove bottom diameter of the second grinding to the original groove bottom diameter of the first grinding is 2(b + R)2-R1)。
In this embodiment, the longitudinal direction represents the direction in which the diameter of the bearing ring moves, that is, the direction along the diameter of the grinding wheel; the lateral direction refers to the direction of movement along the axis of the grinding wheel. For bearings, the motion of the grinding wheel is in two-dimensional coordinates, i.e., there is only in-plane motion, and there is no motion (outward or inward) relative to the z-axis direction outside the xy-axis in fig. 3.
By utilizing the calculation formula of the longitudinal feed amount b of the grinding wheel, which is determined by the invention, when the channel grinding is carried out, the longitudinal feed amount of the grinding wheel, which is still in a complete channel shape during the secondary grinding, can be directly calculated by obtaining the channel curvature radius of the primary channel grinding, the height of the locking notch, the channel curvature radius of the secondary channel grinding and the transverse feed amount of the grinding wheel.
When the inner ring of a certain angular contact ball bearing is ground by using the method, the curvature radius of the groove of the bearing channel is 2.86mm during the first grinding, and the height of the locking notch is 0.2 mm. The radius of curvature of the groove during the second grinding is 2.88mm, and the transverse feed amount of the grinding wheel is 0.1 mm.
In order to ensure the complete groove shape of the channel after secondary processing, the grinding wheel needs longitudinal feeding b.
Figure BDA0003608273930000071
At this time, the lock notch high point of the second grinding overlaps the lock notch high point of the first grinding, and the amount of decrease in the new groove bottom diameter of the second grinding from the original groove bottom diameter of the first grinding is 2 × (0.019+2.88-2.86) ═ 0.078 mm. Accordingly, the relevant grinding parameters for ensuring the integrity of the groove shape can be determined, namely, the grinding wheel needs to continuously move downwards by 0.019mm on the basis of the radial displacement of the first groove grinding, or the diameter of the newly formed groove bottom is ensured to be reduced by 0.078mm at least on the basis of the diameter of the groove bottom formed by the first groove grinding.
The embodiment of the control method comprises the following steps:
the invention also provides a control method for processing the bearing, according to the grinding wheel longitudinal feed amount determined by the method for determining the grinding wheel feed amount by processing the bearing provided by the invention, the grinding wheel is controlled to move longitudinally to process and grind the bearing, whether the bearing channel reaches the set processing standard or not is judged after processing, namely whether the channel curvature radius of the bearing reaches the required set value or not and whether the channel section is a complete arc line or not is judged, if not, the longitudinal feed amount of the grinding wheel is recalculated, and the processing is carried out again. The method for determining the grinding wheel feed amount by bearing machining is already described in the method embodiment, and is not described in detail herein.

Claims (10)

1. A method for determining the feed amount of a grinding wheel in bearing machining is characterized by comprising the following steps:
1) acquiring a first groove curvature radius, a lock notch high point position and a first groove curvature center of a bearing during primary processing;
2) the transverse distance from the curvature center of the first groove to the high point of the lock opening is taken as a first transverse distance, and the longitudinal distance from the curvature center of the first groove to the high point of the lock opening is taken as a first longitudinal distance; determining a first longitudinal distance according to the curvature radius of the first groove and the position of the high point of the locking notch, and determining a first transverse distance according to the first longitudinal distance and the curvature radius of the first groove;
3) acquiring the curvature radius of a second groove of the bearing subjected to secondary processing after primary processing, and acquiring the transverse feeding amount of the grinding wheel during secondary processing of the bearing; presetting a second groove curvature center of the bearing to be machined, wherein the transverse distance from the second groove curvature center to the high point of the locking notch is a second transverse distance, and the longitudinal distance from the second groove curvature center to the high point of the locking notch is a second longitudinal distance; determining a second transverse distance according to the first transverse distance and the transverse feeding amount of the grinding wheel, and determining a second longitudinal distance according to the second transverse distance and the curvature radius of the second groove;
4) and (4) enabling the position of the high point of the locking notch in the secondary processing to coincide with the position of the high point of the locking notch in the primary processing, and calculating the difference between the first longitudinal distance and the second longitudinal distance, wherein the difference is the longitudinal feeding amount of the grinding wheel.
2. The method for determining the feeding amount of the grinding wheel in the bearing machining process according to claim 1, wherein in the step 2), the first transverse distance is calculated by the following formula:
Figure FDA0003608273920000011
wherein l1Is a first transverse distance, R1Is the radius of curvature of the first groove, t1Is the height of the locking notch.
3. The method for determining the grinding wheel feed amount in the bearing machining process according to claim 1, wherein in the step 3), the second longitudinal distance is calculated by the following formula:
Figure FDA0003608273920000012
wherein l2Is a second longitudinal distance, R2Is the second groove radius of curvature, R1Is the radius of curvature of the first groove, t1And a is the transverse feeding amount of the grinding wheel, wherein the locking notch height is shown in the specification.
4. A method of determining feed of grinding wheel for machining of bearings according to claim 2 or 3, characterized in that the longitudinal feed of the grinding wheel is calculated by the following formula:
Figure FDA0003608273920000021
wherein b is the longitudinal feed of the grinding wheel.
5. The method for determining wheel feed for bearing machining of claim 4 wherein a first groove bottom diameter is determined based on the first groove radius of curvature and a second groove bottom diameter is determined based on the second groove radius of curvature; calculating the difference value of the first groove bottom diameter and the second groove bottom diameter according to the longitudinal feeding amount of the grinding wheel by the following formula:
Δ＝2(b+R2-R1)
wherein Δ is the difference between the first trench bottom diameter and the second trench bottom diameter.
6. A control method for bearing machining is characterized by comprising the following steps:
a, acquiring a first groove curvature radius, a lock notch high point position and a first groove curvature center of a bearing during primary processing;
b, the transverse distance from the curvature center of the first groove to the high point of the locking notch is a first transverse distance, and the longitudinal distance from the curvature center of the first groove to the high point of the locking notch is a first longitudinal distance; determining a first longitudinal distance according to the curvature radius of the first groove and the position of the high point of the locking notch, and determining a first transverse distance according to the first longitudinal distance and the curvature radius of the first groove;
c, presetting the curvature radius of a second groove of the bearing to be machined for the second time after the bearing to be machined for the first time is machined for the second time, and acquiring the transverse feeding amount of the grinding wheel when the bearing to be machined is machined for the second time; presetting a second groove curvature center of the bearing to be processed, wherein the transverse distance from the second groove curvature center to the high point of the locking notch is a second transverse distance, and the longitudinal distance from the second groove curvature center to the high point of the locking notch is a second longitudinal distance; determining a second transverse distance according to the first transverse distance and the transverse feeding amount of the grinding wheel, and determining a second longitudinal distance according to the second transverse distance and the curvature radius of the second groove;
d, enabling the position of the high point of the locking notch in the secondary machining to coincide with the position of the high point of the locking notch in the primary machining, and calculating the difference between the first longitudinal distance and the second longitudinal distance, wherein the difference is the longitudinal feeding amount of the grinding wheel;
and E, controlling the grinding wheel to machine the bearing according to the longitudinal feeding amount and the transverse feeding amount of the grinding wheel, judging whether the machined bearing channel reaches the set machining standard or not after machining again, and repeating the steps A to D to machine again if the machined bearing channel does not reach the set machining standard.
7. The method of claim 6, wherein in step B, the first lateral distance is calculated by the following formula:
Figure FDA0003608273920000022
wherein l1Is a first transverse distance, R1Is the radius of curvature of the first groove, t1Is the height of the locking notch.
8. The control method for processing a bearing according to claim 6, wherein in the step C, the second longitudinal distance is calculated by the following formula:
Figure FDA0003608273920000031
wherein l2Is a second longitudinal distance, R2Is the second groove radius of curvature, R1Is the radius of curvature of the first groove, t1And a is the transverse feeding amount of the grinding wheel, namely the height of the locking notch.
9. A control method of bearing machining according to claim 7 or 8, wherein the longitudinal feed amount of the grinding wheel is calculated by the following formula:
Figure FDA0003608273920000032
wherein b is the longitudinal feed of the grinding wheel.
10. The control method of claim 9, wherein the first groove bottom diameter is determined based on the first groove radius of curvature, and the second groove bottom diameter is determined based on the second groove radius of curvature; calculating the difference value of the first groove bottom diameter and the second groove bottom diameter according to the longitudinal feeding amount of the grinding wheel by the following formula:
Δ＝2(b+R2-R1)
wherein Δ is the difference between the first trench bottom diameter and the second trench bottom diameter.
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