Method for calculating deformation of ring part during induction quenching

Abstract

The application provides a kind of ring induction quenching deformation calculation method, it is related to ring processing technical field;Ring induction quenching deformation calculation method includes: marking several groups of mark groups on the outside of ring, each group of mark groups includes first mark point and second mark point;Select standard point on ring;Before and after induction quenching of ring, respectively with preset speed rotates ring, respectively obtains the deformation of ring at each first mark point and each second mark point before and after induction quenching, forms deformation group before induction quenching and deformation group after induction quenching;According to deformation group before induction quenching and deformation group after induction quenching, obtain the deformation before induction quenching and the deformation after induction quenching of ring;According to the deformation before induction quenching and the deformation after induction quenching of ring, calculate ring induction quenching deformation;The ring induction quenching deformation calculation method of the application is convenient for controlling the deformation of ring induction quenching.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ring piece machining, and in particular to a method for calculating the deformation amount of a ring piece after induction quenching. BACKGROUND

[0002] A shield machine is widely used in the fields of tunnels and railways, and a large number of ring pieces such as compression rings and floating rings exist in the main bearing of the shield machine. The ring pieces need to be heat treated to improve mechanical properties such as strength and wear resistance. Induction quenching is mostly used for the heat treatment of the ring pieces. Induction quenching is a method of rapidly heating the surface of a part in the form of eddy current according to the skin effect of alternating current, and then quenching, by using the principle of electromagnetic induction to cut the magnetic force lines in the alternating magnetic field to generate an induced current on the surface of the part.

[0003] When the related technology adopts the induction quenching method to heat the ring piece, the ring piece is prone to deformation during induction quenching because the ring piece in the shield machine is large in size and thin in wall thickness. During the induction quenching process, the heating effect is affected by parameters such as the voltage used by the inductor, the current frequency of the inductor and the distance between the ring piece and the inductor, so it is inconvenient to adjust the corresponding parameters after quenching deformation, thereby making it inconvenient to control the deformation amount of the ring piece. SUMMARY

[0004] The application provides a method for calculating the deformation amount of a ring piece after induction quenching, to solve the technical problem that the related technology is inconvenient to adjust the corresponding parameters after quenching deformation, thereby making it inconvenient to control the deformation amount of the ring piece.

[0005] The application provides a method for calculating the deformation amount of a ring piece after induction quenching, comprising:

[0006] A plurality of groups of marks are marked on the outer side surface of the ring piece, each group of marks comprising a first mark point and a second mark point, and the first mark point and the second mark point are distributed symmetrically about the center of the ring piece;

[0007] A standard point is selected on the ring piece;

[0008] The ring piece is rotated at a preset speed before and after induction quenching, respectively, and the deformation amounts of the ring piece at each first mark point and each second mark point before induction quenching are obtained according to the positions of each first mark point and each second mark point relative to the standard point, to form a deformation amount group before induction quenching, and the deformation amounts of the ring piece at each first mark point and each second mark point after induction quenching are obtained, to form a deformation amount group after induction quenching;

[0009] According to the deformation amount group before induction quenching and the deformation amount group after induction quenching, the deformation amount before induction quenching and the deformation amount after induction quenching of the ring piece are obtained.

[0010] According to the deformation amount before induction quenching and the deformation amount after induction quenching of the ring piece, the induction quenching deformation amount of the ring piece is calculated.

[0011] In some embodiments, the obtaining, according to the positions of each of the first mark points and each of the second mark points relative to the standard point, the deformation amount of the ring piece at each of the first mark points and each of the second mark points before induction quenching and after induction quenching, respectively, to form the deformation amount group before induction quenching and the deformation amount group after induction quenching, comprises:

[0012] The first runout values of each of the first mark points and each of the second mark points relative to the standard point are obtained, and the same positive integer is added to each of the first runout values to form the second runout values of each of the first mark points and each of the second mark points, wherein the second runout values are positive numbers:

[0013] The rotation angles of each of the first mark points and each of the second mark points relative to the standard point are obtained;

[0014] The second runout values before induction quenching and the rotation angles form the deformation amount group before induction quenching;

[0015] The second runout values after induction quenching and the rotation angles form the deformation amount group after induction quenching.

[0016] In some embodiments, the obtaining, according to the deformation amount group before induction quenching and the deformation amount group after induction quenching, the deformation amount before induction quenching and the deformation amount after induction quenching of the ring piece, comprises:

[0017] A polar coordinate system is established with the second runout values and the rotation angles, and each of the first mark points and each of the second mark points are sequentially connected to form a polygon, wherein the polar coordinate system takes the standard point as a coordinate origin;

[0018] The absolute value of the difference between two second runout values in the same mark group is calculated to obtain a third runout value;

[0019] The first mark point and the second mark point in the first two digits of the larger value in the third runout value are connected to form a first straight line and a second straight line;

[0020] The first straight line and the second straight line are respectively vertically bisected to form a first vertical bisector and a second vertical bisector;

[0021] The distance between the intersection point of the first perpendicular bisector and the second perpendicular bisector and the coordinate origin is calculated to obtain the deformation before induction hardening of the ring and the deformation after induction hardening of the ring.

[0022] In some embodiments, the calculating the deformation after induction hardening of the ring according to the deformation before induction hardening of the ring and the deformation after induction hardening of the ring comprises:

[0023] The deformation after induction hardening of the ring S is calculated according to the following formula:

[0024]

[0025] The coordinate value of the intersection point of the first perpendicular bisector and the second perpendicular bisector on the polar coordinate system before induction hardening of the ring is ;

[0026] Wherein, is the polar radius of the intersection point of the first perpendicular bisector and the second perpendicular bisector on the polar coordinate system before induction hardening of the ring, is the polar angle of the intersection point of the first perpendicular bisector and the second perpendicular bisector on the polar coordinate system before induction hardening of the ring;

[0027] The coordinate value of the intersection point of the first perpendicular bisector and the second perpendicular bisector on the polar coordinate system after induction hardening of the ring is ;

[0028] Wherein, is the polar radius of the intersection point of the first perpendicular bisector and the second perpendicular bisector on the polar coordinate system after induction hardening of the ring, is the polar angle of the intersection point of the first perpendicular bisector and the second perpendicular bisector on the polar coordinate system after induction hardening of the ring.

[0029] In some embodiments, the marking a plurality of groups of marking groups on the outer side surface of the ring comprises:

[0030] Marking a plurality of groups of the marking groups on the same circumference of the outer side surface of the ring.

[0031] In some embodiments, the marking a plurality of groups of marking groups on the outer side surface of the ring comprises:

[0032] Marking at least six groups of the marking groups on the outer side surface of the ring.

[0033] In some embodiments, the rotating the ring at a preset speed comprises:

[0034] Placing the ring on a rotating table of an induction hardening machine, and the ring rotates with the rotating table.

[0035] wherein the rotation speed of the rotating table is 1 -3 The rotation speed is an angular velocity.

[0036] In some embodiments, the selecting the standard point on the ring includes:

[0037] Selecting the standard point on the ring which is located at the same circumference as the mark group.

[0038] In some embodiments, the obtaining the first run-out value of each of the first mark point and each of the second mark point relative to the standard point includes:

[0039] Obtaining the first run-out value of each of the first mark point and each of the second mark point relative to the standard point by using a dial indicator.

[0040] In some embodiments, before the marking a plurality of mark groups on the outer surface of the ring, the method further includes:

[0041] Coarsely machining the ring to make the ovality of the ring less than or equal to 0.02mm

[0042] The application provides a method for calculating the deformation of a ring after induction quenching. When the deformation of the ring after induction quenching needs to be controlled, the deformation before the induction quenching of the ring is obtained according to the positions of each first mark point and each second mark point relative to a standard point before the induction quenching of the ring, the parameters such as the voltage used by an inductor, the current frequency of the inductor and the distance between the ring and the inductor are kept unchanged, the ring is quenched, the deformation after the induction quenching of the ring is obtained according to the positions of each first mark point and each second mark point relative to the standard point after the induction quenching of the ring, and the deformation of the ring after the induction quenching is calculated according to the deformation before the induction quenching of the ring and the deformation after the induction quenching of the ring. After the parameters such as the voltage used by the inductor, the current frequency of the inductor or the distance between the ring and the inductor are adjusted, the deformation of the ring after the induction quenching is calculated again according to the deformation before the induction quenching of the ring and the deformation after the induction quenching of the ring. The influence of the parameters on the deformation of the ring can be known by comparing the deformations of the ring before and after the adjustment of the parameters, the parameters affecting the induction quenching are adjusted, so that the deformation of the ring is controlled by the parameters, the deformation of each mark group on the ring can be known by calculating the deformation after the induction quenching of the ring, so that the workload of the correction of the deformation of the corresponding positions of the mark groups on the ring is reduced, and the efficiency of the correction of the ring is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application.

[0044] Figure 1 A simple flowchart of a calculation method of a deformation amount of a ring piece after induction quenching provided for an embodiment of the application;

[0045] Figure 2 A polar coordinate system constructed by a second runout value and a rotation angle before induction quenching of a ring piece for a calculation method of a deformation amount of a ring piece after induction quenching provided for an embodiment of the application;

[0046] Figure 3 A polar coordinate system constructed by a second runout value and a rotation angle after induction quenching of a ring piece for a calculation method of a deformation amount of a ring piece after induction quenching provided for an embodiment of the application.

[0047] The specific embodiments of the application have been shown by the above-described drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the application in any way, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals represent like elements, unless the context of use indicates otherwise. The following description of exemplary embodiments is not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] As described in the background, when the related art adopts the induction quenching method to heat the ring piece, because the size of the ring piece in the shield machine is large and the wall thickness is thin, the ring piece is prone to deformation during induction quenching. During the induction quenching process, the voltage size used by the inductor of the induction quenching, the current frequency of the inductor, and the distance between the ring piece and the inductor, etc. affect the heating effect, which makes it inconvenient to adjust the corresponding parameters after quenching deformation, thereby making it inconvenient to control the deformation amount of the ring piece.

[0050] To solve the above technical problems, the embodiment of the present application provides a method for calculating the deformation of a ring after induction quenching. Before the ring is induction quenched, the parameters affecting the induction quenching, such as the voltage used by the inductor, the current frequency of the inductor, and the distance between the ring and the inductor, are kept unchanged. According to the second run-out value and the rotation angle of the ring before induction quenching, the first two digits of the third run-out value in each marker group are selected, and the deformation of the ring before induction quenching is calculated by constructing a polar coordinate system. After the ring is induction quenched, according to the second run-out value and the rotation angle of the ring after induction quenching, the first two digits of the third run-out value in each marker group are selected, and the deformation of the ring after induction quenching is calculated by constructing a polar coordinate system. By adjusting the parameters, the deformation of the ring after induction quenching is calculated according to the deformation of the ring before induction quenching and the deformation of the ring after induction quenching.

[0051] By adjusting the parameters affecting the induction quenching, such as the voltage used by the inductor, the current frequency of the inductor, or the distance between the ring and the inductor, the deformation of the ring after induction quenching is calculated again according to the second run-out value and the rotation angle of the ring before induction quenching. After the ring is induction quenched, according to the second run-out value and the rotation angle of the ring after induction quenching, the first two digits of the third run-out value in each marker group are selected, and the deformation of the ring after induction quenching is calculated by constructing a polar coordinate system. By adjusting the parameters, the deformation of the ring after induction quenching is calculated according to the deformation of the ring before induction quenching and the deformation of the ring after induction quenching. By comparing the deformation of the ring after induction quenching before and after adjusting the parameters, the influence of each parameter on the deformation of the ring can be determined, which facilitates the adjustment of each parameter affecting the induction quenching, thereby facilitating the control of the deformation of the ring by each parameter. After the deformation of the ring occurs during induction quenching, the deformation of each marker group on the ring can be determined by calculating the deformation, thereby reducing the workload of correcting the deformation of the corresponding position of the marker group on the ring, and improving the efficiency of correcting the ring.

[0052] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0053] A method for calculating the deformation of a ring after induction quenching, comprising:

[0054] S101: Marking a plurality of marker groups on the outer side of the ring, each marker group comprising a first marker point and a second marker point, the first marker point and the second marker point being symmetrically distributed about the center of the ring;

[0055] S201: selecting a standard point on the ring piece;

[0056] S301: rotating the ring piece at a preset speed before and after induction quenching of the ring piece, and respectively acquiring, according to positions of each first mark point and each second mark point relative to the standard point, deformation amounts of the ring piece at each first mark point and each second mark point before the induction quenching, to form a deformation amount group before the induction quenching, and deformation amounts of the ring piece at each first mark point and each second mark point after the induction quenching, to form a deformation amount group after the induction quenching;

[0057] S401: acquiring deformation amounts before and after the induction quenching of the ring piece according to the deformation amount group before the induction quenching and the deformation amount group after the induction quenching;

[0058] S501: calculating an induction quenching deformation amount of the ring piece according to the deformation amounts before and after the induction quenching of the ring piece.

[0059] By adopting the above technical solution, when the deformation amount of the ring piece after the induction quenching needs to be controlled, the deformation amount group before the induction quenching of the ring piece is acquired according to the positions of each first mark point and each second mark point relative to the standard point, the voltage used by the inductor, the current frequency of the inductor, and the distance between the ring piece and the inductor are kept unchanged, the ring piece is quenched, the deformation amount group after the induction quenching of the ring piece is acquired according to the positions of each first mark point and each second mark point relative to the standard point after the quenching is completed, and the induction quenching deformation amount of the ring piece is calculated according to the deformation amounts before and after the induction quenching of the ring piece.

[0060] By adjusting the voltage used by the inductor, the current frequency of the inductor, or the distance between the ring piece and the inductor, and then calculating the induction quenching deformation amount of the ring piece according to the deformation amounts before and after the induction quenching of the ring piece, the influence of each parameter on the deformation amount of the ring piece can be known by comparing the deformation amounts of the ring piece before and after the adjustment of the parameters, the adjustment of each parameter during the induction quenching is facilitated, the deformation amount of the ring piece is controlled through each parameter, the deformation amount of each mark group on the ring piece can be known after the deformation of the ring piece during the induction quenching, the workload of correction after the deformation of the ring piece at positions corresponding to the mark groups is reduced, and the efficiency of the correction of the ring piece is improved.

[0061] According to the positions of each first mark point and each second mark point relative to the standard point, respectively acquiring deformation amounts of the ring piece at each first mark point and each second mark point before the induction quenching, to form a deformation amount group before the induction quenching, and deformation amounts of the ring piece at each first mark point and each second mark point after the induction quenching, to form a deformation amount group after the induction quenching, comprises:

[0062] S3011: Obtain the first runout values of the first marking points and the second marking points relative to the standard point, add the same positive integer to each first runout value to form the second runout values of the first marking points and the second marking points, wherein the second runout values are positive numbers:

[0063] S3012: Obtain the rotation angles of the first marking points and the second marking points relative to the standard point;

[0064] S3013: Sense the second runout values and the rotation angles before induction quenching to form a deformation amount group before induction quenching, and sense the second runout values and the rotation angles after induction quenching to form a deformation amount group after induction quenching.

[0065] In the embodiment, the rotation angle of the first marking point relative to the standard point is the included angle between the line connecting the first marking point and the center of the ring and the line connecting the standard point and the center of the ring, and the rotation angle of the second marking point relative to the standard point is the included angle between the line connecting the second marking point and the center of the ring and the line connecting the standard point and the center of the ring.

[0066] By adopting the technical scheme, the first runout values of the first marking points and the second marking points are recorded, and the same positive integer is added to the first runout values to form the second runout values of the first marking points and the second marking points, so that the first marking points and the second marking points are positive numbers, thereby facilitating the calculation of the deformation amounts of the ring before induction quenching and after induction quenching by using the positive second runout values. When the second runout values are larger, the deformation amounts of the first marking points and the second marking points are larger, and the position of the maximum deformation of the ring is determined by the second runout values, thereby facilitating the control of the deformation amount of the ring.

[0067] According to the deformation amount group before induction quenching and the deformation amount group after induction quenching, the deformation amounts of the ring before induction quenching and after induction quenching are obtained, including:

[0068] S4011: Establish a polar coordinate system with the second runout values and the rotation angles, and sequentially connect the first marking points and the second marking points to form a polygon, wherein the polar coordinate system takes the standard point as the coordinate origin;

[0069] S4012: Calculate the absolute value of the difference between two second runout values in the same marking group to obtain a third runout value;

[0070] S4013: Connect the first marking point and the second marking point in the first two digits of the larger value in the third runout value to form a first straight line and a second straight line;

[0071] S4014: Perpendicularly bisect the first straight line and the second straight line respectively to form a first perpendicular bisector and a second perpendicular bisector;

[0072] S4015: Calculate the distance between the intersection of the first and second perpendicular bisectors and the origin of the coordinate system to obtain the deformation of the ring before induction hardening and the deformation after induction hardening.

[0073] In this embodiment, a polar coordinate system is established using CAD software based on the second runout value and rotation angle.

[0074] By adopting the above technical solution, the first and second marker points among the two largest third jump values ​​are selected to form a first straight line and a second straight line. The first and second perpendicular bisectors of the first and second straight lines are then drawn. The intersection of the first and second perpendicular bisectors is the center point of the polygon formed by connecting the first and second marker points in the polar coordinate system. The distance between the center point of the polygon and the origin is the magnitude of the deformation of the ring before and after induction hardening. By constructing a polar coordinate system to find the center point of the polygon, it is not necessary to calculate all the data, which facilitates the calculation of the deformation of the ring before and after induction hardening, thus making it easier to calculate the deformation of the ring during induction hardening.

[0075] The deformation of the ring during induction hardening is calculated based on the deformation before and after induction hardening, including:

[0076] S51: Calculate the deformation S of the ring after induction hardening according to the following formula:

[0077]

[0078] The coordinates of the intersection of the first and second perpendicular bisectors of the ring before induction hardening in the polar coordinate system are: ;

[0079] in, Let be the polar radius in the polar coordinate system of the intersection point of the first and second perpendicular bisectors before induction hardening of the ring. The polar angle in the polar coordinate system is the intersection of the first and second perpendicular bisectors of the ring before induction hardening.

[0080] The coordinates of the intersection of the first and second perpendicular bisectors of the ring in the polar coordinate system after induction hardening are: ;

[0081] in, Let be the polar radius in the polar coordinate system of the intersection point of the first and second perpendicular bisectors after induction hardening of the ring. Let be the polar angle in the polar coordinate system at the intersection of the first and second perpendicular bisectors after induction hardening of the ring.

[0082] By adopting the technical scheme, the position of the intersection of the first perpendicular bisector and the second perpendicular bisector is determined by using the polar coordinate system, so that the deformation amount before and after the ring part is induction hardened is calculated, and the distance between the center points of the polygons formed in the polar coordinate system before and after the ring part is induction hardened is calculated directly by using the distance formula between the two coordinate points in the polar coordinate system, so that the deformation amount of the ring part during induction hardening is calculated.

[0083] A plurality of groups of markers are marked on the outer side surface of the ring part, including:

[0084] A plurality of groups of markers are marked on the same circumference of the outer side surface of the ring part.

[0085] By adopting the technical scheme, the first and second marker points on the same circumference of the ring part are selected, so that the accuracy of measuring the first run-out value is improved; in the embodiment, the adjacent first marker points are selected in the unequal spacing manner; in other embodiments, the adjacent first marker points can also be selected in the equal spacing manner.

[0086] A plurality of groups of markers are marked on the outer side surface of the ring part, including:

[0087] At least six groups of markers are marked on the outer side surface of the ring part.

[0088] By adopting the technical scheme, the six groups of markers are selected, so that the polygon in the polar coordinate system is determined, and thus the center point of the polygon in the polar coordinate system is determined.

[0089] In other embodiments, the number of groups of markers selected on the outer side surface of the ring part can be adjusted adaptively according to needs, for example, three groups of markers or twelve groups of markers are selected.

[0090] The ring part is rotated at a preset speed, including:

[0091] The ring part is placed on the rotating table of the induction hardening machine tool, and the ring part rotates with the rotating table, wherein the rotating speed of the rotating table is 1° / s-3° / s, and the rotating speed is an angular velocity.

[0092] By adopting the technical scheme, the quenching machine tool mainly consists of a bed, a sliding table, a clamping and rotating mechanism, a cooling system, a quenching liquid circulating system, an electrical control system and the like; the quenching machine tool is generally a single station (a double-station quenching machine tool can be used for small-diameter workpieces); the quenching machine tool has two major types of vertical and horizontal types in terms of structure, and a user can select a quenching machine tool according to a quenching process; for special parts or special processes, a special quenching machine tool can be designed and manufactured according to the heating process requirements.

[0093] The quenching machine tool is a prior art, and its specific structure is not described in detail in the embodiment.

[0094] In other embodiments, the rotation speed of the rotating table can be adjusted adaptively as needed.

[0095] By placing the ring on the rotating table, the deformation of the ring during induction quenching is calculated according to the rotation angle of the first mark point and the second mark point, the first runout value, the second runout value and the third runout value of each mark group, and the data of the rotating table of the quenching machine is irrelevant. In the case of deviation between the center of the ring and the center of the rotating table, the deformation of the ring during induction quenching can also be calculated, thereby preventing the deviation of the placement of the ring from causing deviation in the calculation of the deformation of the ring during induction quenching.

[0096] The standard points on the ring include:

[0097] The standard points on the ring are located on the same circumference as the mark groups.

[0098] By adopting the above technical solution, by selecting the standard points on the same circumference as the mark groups, the positions of the first mark points and the second mark points relative to the standard points are prevented from deviating, which facilitates the calculation of the first runout value of each first mark point and each second mark point according to the standard points, and improves the accuracy of the calculation of the deformation of the ring before and after induction quenching.

[0099] The first runout value of each first mark point and each second mark point relative to the standard point includes:

[0100] The first runout value of each first mark point and each second mark point relative to the standard point is obtained by a dial gauge.

[0101] By adopting the above technical solution, by abutting the pointer of the dial gauge on the outer side surface of the ring, the ring can drive the pointer to move towards the inside and outside of the dial gauge when rotating, and the runout value of the pointer on the dial gauge is recorded as the first runout value of each first mark point and each second mark point.

[0102] Before marking a plurality of mark groups on the outer side surface of the ring, it includes:

[0103] The ring is roughly machined so that the ovality of the ring is less than or equal to 0.02mm.

[0104] By adopting the above technical solution, the ring is roughly machined, thereby preventing the ring from being deformed too much due to machining, indirectly reducing the deformation of the ring during induction quenching, and thereby indirectly improving the calculation accuracy of the deformation of the ring during induction quenching.

[0105] The following will be further described in conjunction with specific embodiments:

[0106] Six mark groups (a total of six first mark points and six second mark points) are taken on the ring.

[0107] Wherein the points 1, 2, 3, 4, 5 and 6 are the first marking points, the points 7, 8, 9, 10, 11 and 12 are the second marking points, the marking points 1 and 7, 2 and 8, 3 and 9, 4 and 10, 5 and 11 and 6 and 12 are respectively the same marking group, and the ring is rotated at a preset speed of 2° / s.

[0108] The rotation angle, the first runout value, the second runout value and the third runout value of each marking group of the ring before quenching are shown in Table 1.

[0109] Table 1 Rotation angle, first runout value, second runout value and third runout value of each marking group of the ring before quenching:

[0110]

[0111] It can be known from Table 1 that the first two groups with larger third runout value before induction quenching of the ring are group 3 and group 4.

[0112] Referring to Table 1, Figure 2 The second runout value and the rotation angle in the table are used to establish a polar coordinate system, and each first marking point and each second marking point are sequentially connected to form a polygon, the first straight line is formed by connecting the point 3 and the point 9, and the second straight line is formed by connecting the point 4 and the point 10, the first straight line and the second straight line are vertically bisected to form a first vertical bisector and a second vertical bisector.

[0113] The first vertical bisector and the second vertical bisector intersect at the point A (0.49, 98.4°) in the polar coordinate, and the distance between the point A (0.49, 98.4°) and the zero standard point (0.0) is the deformation amount before induction quenching of the ring.

[0114] When the ring is quenched by induction, the rotation angle, the first runout value, the second runout value and the third runout value of the points 1 to 12 of each marking group of the ring are recorded again, as shown in Table 2.

[0115] Table 2 Rotation angle, first runout value, second runout value and third runout value of each marking group of the ring after quenching:

[0116]

[0117] It can be known from Table 2 that the first two groups with larger third runout value after induction quenching of the ring are group 4 and group 5, and referring to Table 2, Figure 3The polar coordinate system is established with the second fluctuation value and the rotation angle in the table, and each first mark point and each second mark point are sequentially connected to form a polygon, the first straight line is formed by connecting point 4 and point 10, and the second straight line is formed by connecting point 5 and point 11, the first vertical bisector and the second vertical bisector are formed by vertically bisecting the first straight line and the second straight line, the first vertical bisector and the second vertical bisector intersect at point B (0.55, 131.1°) in the polar coordinate system, and the distance between point B (0.55, 131.1°) and the zero standard point (0.0) is the deformation amount after the ring part is inductively quenched. The deformation amount of the ring part after inductive quenching is calculated through the coordinate value (0.49, 98.4°) of the intersection point A of the first vertical bisector and the second vertical bisector in the polar coordinate system before inductive quenching of the ring part and the coordinate value (0.55, 131.1°) of the intersection point B of the first vertical bisector and the second vertical bisector in the polar coordinate system after inductive quenching of the ring part, that is, the distance between the intersection point A and the intersection point B.

[0118]

[0119] According to the above formula, it is known that the deformation amount of the ring part after inductive quenching is 0.298 under the premise that the parameters such as the voltage size used by the inductor, the current frequency of the inductor and the distance between the ring part and the inductor are not adjusted. At this time, the deformation amount of the ring part after inductive quenching is calculated again by adjusting the parameters such as the voltage size used by the inductor, the current frequency of the inductor or the distance between the ring part and the inductor alone. For example, the voltage of the inductor is adjusted alone. When the voltage of the inductor is increased, the deformation amount of the ring part after inductive quenching is calculated again according to the above steps. If the deformation amount of the ring part after inductive quenching after adjusting the parameters is greater than 0.298, it means that increasing the voltage of the inductor will increase the deformation amount of the ring part after inductive quenching. If the deformation amount of the ring part after inductive quenching after adjusting the parameters is less than 0.298, it means that increasing the voltage of the inductor will decrease the deformation amount of the ring part after inductive quenching. By adjusting different parameters respectively, the deformation amount of the ring part after inductive quenching can be controlled.

[0120] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0121] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is indicated only by the appended claims.

Claims

1. A method of calculating the amount of induction quenching distortion of a ring, characterized by, The method comprises the following steps: Marking a plurality of groups of marks on the outer side of a ring, each group of marks comprising a first mark point and a second mark point, the first mark point and the second mark point being distributed in a center-symmetrical manner along the center of the ring; Selecting a standard point on the ring; Rotating the ring at a preset speed before and after induction quenching, respectively, and obtaining the deformation amount of the ring at each first mark point and each second mark point before induction quenching and the deformation amount of the ring at each first mark point and each second mark point after induction quenching, respectively, according to the positions of each first mark point and each second mark point relative to the standard point, to form a deformation amount group before induction quenching and a deformation amount group after induction quenching; According to the deformation amount group before induction quenching and the deformation amount group after induction quenching, obtaining the deformation amount of the ring before induction quenching and the deformation amount of the ring after induction quenching; According to the deformation amount of the ring before induction quenching and the deformation amount of the ring after induction quenching, calculating the induction quenching deformation amount of the ring; According to the positions of each first mark point and each second mark point relative to the standard point, respectively, obtaining the deformation amount of the ring at each first mark point and each second mark point before induction quenching to form a deformation amount group before induction quenching, and obtaining the deformation amount of the ring at each first mark point and each second mark point after induction quenching to form a deformation amount group after induction quenching, comprises: Obtaining a first runout value of each first mark point and each second mark point relative to the standard point, adding the same positive integer to each first runout value to form a second runout value of each first mark point and each second mark point, wherein the second runout value is a positive number: Obtaining a rotation angle of each first mark point and each second mark point relative to the standard point; The second runout value before induction quenching and the rotation angle form the deformation amount group before induction quenching, and the second runout value after induction quenching and the rotation angle form the deformation amount group after induction quenching; According to the deformation amount group before induction quenching and the deformation amount group after induction quenching, obtaining the deformation amount of the ring before induction quenching and the deformation amount of the ring after induction quenching, comprises: Establishing a polar coordinate system with the second runout value and the rotation angle, and sequentially connecting each first mark point and each second mark point to form a polygon, wherein the polar coordinate system takes the standard point as a coordinate origin; Calculating the absolute value of the difference between two second runout values in the same mark group to obtain a third runout value; Connecting the first mark point and the second mark point in the first two digits of the larger value in the third runout value to form a first straight line and a second straight line; Vertically bisecting the first straight line and the second straight line, respectively, to form a first vertical bisector and a second vertical bisector; Calculating the distance between the intersection point of the first vertical bisector and the second vertical bisector and the coordinate origin to obtain the deformation amount of the ring before induction quenching and the deformation amount of the ring after induction quenching. ​ ​ 2. The method of claim 1, wherein The calculating the deformation of the ring after induction hardening comprises: The calculating the deformation of the ring after induction hardening comprises: The coordinate value of the intersection of the first perpendicular bisector and the second perpendicular bisector in a polar coordinate system before induction hardening of the ring piece is (r, θ) ), wherein is a polar radius of the intersection of the first perpendicular bisector and the second perpendicular bisector in a polar coordinate system before induction hardening of the ring piece, is a polar angle of the intersection of the first perpendicular bisector and the second perpendicular bisector in a polar coordinate system before induction hardening of the ring piece. The coordinate value of the intersection point of the first perpendicular bisector and the second perpendicular bisector in a polar coordinate system after the ring piece is inductively quenched is (r, θ) ), wherein r is a polar radius of the intersection point of the first perpendicular bisector and the second perpendicular bisector in a polar coordinate system after the ring piece is inductively quenched, θ is a polar angle of the intersection point of the first perpendicular bisector and the second perpendicular bisector in a polar coordinate system after the ring piece is inductively quenched.

3. The method of claim 1 or 2, wherein The marking a plurality of groups of marking groups on the outer side surface of the ring comprises: The marking a plurality of groups of marking groups on the outer side surface of the ring comprises:

4. The method of claim 1 to 2, wherein The marking a plurality of groups of marking groups on the outer side surface of the ring comprises: The marking a plurality of groups of marking groups on the outer side surface of the ring comprises:

5. The method of claim 1 or 2, wherein The marking a plurality of groups of marking groups on the outer side surface of the ring comprises: The ring is placed on a rotating table of an induction quenching machine, the ring rotating with the rotating table, wherein the rotating speed of the rotating table is 1 -3 , the rotating speed being an angular speed.

6. The method of claim 1-2, wherein The marking a plurality of groups of marking groups on the outer side surface of the ring comprises: The marking a plurality of groups of marking groups on the outer side surface of the ring comprises:

7. The method of claim 1 or 2, wherein The rotating the ring at a preset speed comprises: The selecting a standard point on the ring comprises:

8. The method of claim 1-2, wherein The selecting a standard point on the ring comprises: The selecting a standard point on the ring comprises: The obtaining a first run-out value of each of the first marking points and each of the second marking points relative to the standard point comprises: The obtaining a first run-out value of each of the first marking points and each of the second marking points relative to the standard point comprises: The marking a plurality of groups of marking groups on the outer side surface of the ring comprises: The rough machining the ring to make the ovality of the ring less than or equal to 0.02 mm.

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