Method for adjusting angular position of surface machining element of rotary part

Abstract

The application discloses a kind of surface machining element angular position degree adjustment method of rotary body parts machining technical field, the present method is by when machining angular hole, the radial direction of angular hole is kept machining allowance, so that angular hole can be corrected within a certain range, since the part is rotary body, the position of angular hole is corrected with the axis of the part as the rotation axis, and the change of the radial position relationship of machining element will not be caused, but the angular reference of machining element will be changed, so that the machining element of the angular position degree of the surface of the part is no longer out of tolerance, the effect of adjusting the angular position degree of the surface machining element of the part is realized, the fault tolerance rate of the surface machining element of the part is increased, when the angular position degree of the surface machining element of the part is out of tolerance, it can be compensated within a certain range, a remedial method is provided, the scrap rate of the part is reduced, and the qualified rate of the part is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotary part machining, and particularly relates to a rotary part surface machining element angular position degree adjusting method. BACKGROUND

[0002] When a rotary part surface machining element is machined, an angular hole is generally used to ensure the angular position degree of the machining element.

[0003] Conventionally, when a rotary part surface machining element is machined, the angular hole on the part surface is first finely machined, then the part is positioned based on the angular hole as an angular reference, and the part surface machining element is machined. When the part surface machining element is machined, the angular hole position is fixed, so the machining element is generally first roughly machined. If the angular position degree of the machining element is qualified, the machining element is continuously finely machined. If the angular position degree of the machining element is out of tolerance, the angular position of the machining element needs to be corrected, and then the machining element is finely machined. If the angular position degree of the machining element is out of tolerance after the fine machining, the part is determined as unqualified. When multiple machining elements need to be machined on the part surface, during the part rotation and angle conversion, the part angular positioning is inevitably inaccurate. For some parts with very high precision requirements (such as an aero-engine transmission frame shell), the machining difficulty is very high, and the yield is low.

[0004] Therefore, the present application designs a rotary part surface machining element angular position degree adjusting method to solve the above problems. SUMMARY

[0005] To achieve the above object, the present application provides the following technical scheme: a rotary part surface machining element angular position degree adjusting method, which adjusts the angular position degree of the part surface machining element by adjusting the angular hole position of the part to change the angular reference of the part, and includes the following steps:

[0006] S1, angular hole rough machining;

[0007] S2, machining the part surface machining element based on the angular hole as an angular reference;

[0008] S3, measuring the angular position degree of the machining element by a measuring device;

[0009] S4, judging whether the angular position degree of the part surface machining element is out of tolerance based on the angular hole as an angular reference;

[0010] When the angular position degrees of the part surface machining elements are all qualified, the angular hole is roughly machined, and then the part surface machining element is finely machined;

[0011] When the angular position degrees of the part surface machining elements are out of tolerance, step S5 is performed;

[0012] S5, determining the correction direction of the angular hole according to the overage direction and overage amount of the angular position degree of the machining element, and calculating the correction angle;

[0013] When the corrected angular hole can make all the machining elements reach the design requirement of the angular position degree, the angular hole is finished after the position of the angular hole is corrected;

[0014] When the corrected angular hole cannot make all the machining elements reach the design requirement of the angular position degree, the part is directly replaced, and the machining of the current part is ended.

[0015] As a further scheme of the present application, in step S5, when the correction direction of the angular hole is determined according to the overage direction and overage amount of the angular position degree of the machining element, the overage direction of the machining element with the overage angular position degree is divided into two directions:

[0016] The first direction is that the actual position of the machining element is overage in the clockwise direction compared with the theoretical position with the part axis as the rotation axis;

[0017] The second direction is that the actual position of the machining element is overage in the counterclockwise direction compared with the theoretical position with the part axis as the rotation axis;

[0018] When the overage direction of all the machining elements with the overage angular position degree is the first direction, the correction direction of the angular hole is clockwise around the part axis;

[0019] When the overage direction of all the machining elements with the overage angular position degree is the second direction, the correction direction of the angular hole is counterclockwise around the part axis;

[0020] When the machining element has the overage angular position degree in the first direction and the second direction at the same time, the part is directly replaced, and the machining of the current part is ended.

[0021] As a further scheme of the present application, in step S5, the correction angle of the angular hole is calculated as follows:

[0022] S511, calculating the moving distance of the angular hole in the direction perpendicular to the center line, the center line being a line connecting the center of the angular hole and the part axis and being perpendicular to the part axis;

[0023]

[0024] In the formula, k is the moving distance of the angular hole in the direction perpendicular to the center line, m max is the distance of the machining element with the largest angular position degree from the theoretical position, b is the angular position degree tolerance requirement of the machining element, L1 is the distance from the machining element with the largest angular position degree to the part axis, and L2 is the distance from the center of the angular hole to the part axis;

[0025] S512, move the angular hole by k in the direction perpendicular to the center line to obtain a transition angular hole, and connect the center of the transition angular hole with the axis of the part to obtain a transition center line. The angle difference between the transition center line and the center line is the correction angle of the angular hole.

[0026] As a further solution of the present invention, in step S5, after determining the correction direction and correction angle of the angular hole, the following method is used to determine whether the angular position of other processing elements after the angular hole correction is qualified;

[0027] When the angular position of the machining element increases due to the correction of the angular hole

[0028]

[0029] When the angular position of the machining element is reduced by correcting the angular hole

[0030]

[0031] Where m1 is the distance between the actual position and the theoretical position of the processing element before the angular hole correction, and m2 is the distance between the actual position and the theoretical position of the processing element after the angular hole correction. When m2≤b / 2, the position of the current processing element after the angular hole correction is qualified.

[0032] As a further solution of the present invention, in step S1, when rough-machining the angular hole, a machining allowance is left in the radial direction of the angular hole.

[0033] As a further solution of the present invention, in step S3, the angular position of the processing element is measured by a three-coordinate measuring device.

[0034] As a further solution of the present invention, in step S3, after measuring the angular position of the processing element, a plane figure of the processing element and the angular hole of the part is drawn according to the projection of the part in the axial direction of the part.

[0035] The present invention has the following beneficial effects:

[0036] The method can correct the angular hole in a certain range by reserving a machining allowance in the radial direction of the angular hole when machining the angular hole, and the position of the angular hole is corrected with the axis of the part as the rotation axis, which does not change the radial position relationship of the machining elements, but changes the angular reference of the machining elements, so that the angular position degree of the machining elements on the surface of the part is no longer out of tolerance, compared with the traditional method of correcting the position degree of the machining elements out of tolerance, the angular hole can be corrected at the same time, the correction of the angular hole is simpler, and in the actual production of the rotary part, if the angular position degree is out of tolerance, the out of tolerance direction is generally in one direction, therefore, the adjustment of the angular position degree of the machining elements by correcting the angular hole is more convenient in actual application, at the same time, the angular hole on the surface of the part and the machining elements can be rough machined first, and then the machining elements and the angular hole are machined respectively, so that the angular position of the machining elements can be corrected twice, the fault tolerance rate of the machining elements on the surface of the part is increased, the angular position degree of the machining elements on the surface of the part can be compensated within a certain range when the design requirement is met, a remedy method is provided, the scrap rate of the part is reduced, and the qualified rate of the part is improved.

[0037] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in the explanation of the application. In the drawings, the same reference numbers represent the same elements throughout the several views of the drawings:

[0039] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0040] Figure 2 It is a schematic diagram of the angular position degree out of tolerance of the present application.

[0041] Figure 3 It is a schematic diagram of the angular hole correction angle conversion of the present application.

[0042] Figure 4 It is a schematic diagram of the transmission frame shell in example 1. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in detail below with reference to the drawings, but the present application can be implemented in various different ways as defined and covered below.

[0044] Please refer to Figures 1-4The application provides a technical scheme: a method for adjusting the angular position degree of a surface machining element of a rotary part, which adjusts the angular position degree of the surface machining element of the part by adjusting the angular hole position of the part to change the angular reference of the part, and comprises the following steps:

[0045] S1, rough machining of the angular hole;

[0046] S2, machining of the surface machining element of the part by taking the angular hole as the angular reference;

[0047] S3, measurement of the angular position degree of the machining element by a measuring device;

[0048] S4, judgment of whether the angular position degree of the surface machining element of the part is out of tolerance by taking the angular hole as the angular reference;

[0049] When the angular position degrees of the surface machining elements of the part are all not out of tolerance, the angular hole is finely machined on the basis of the rough machining of the angular hole;

[0050] When the angular position degrees of the surface machining elements of the part are out of tolerance, step S5 is performed;

[0051] S5, determination of the correction direction of the angular hole and calculation of the correction angle according to the out-of-tolerance direction and the out-of-tolerance amount of the machining element whose angular position degree is out of tolerance;

[0052] When the corrected angular hole can make the angular position degrees of all the machining elements meet the design requirements, the angular hole is finely machined after the position of the angular hole is corrected;

[0053] When the corrected angular hole cannot make the angular position degrees of all the machining elements meet the design requirements, the part is directly replaced, and the machining of the current part is ended.

[0054] Firstly, in step S1, when the angular hole is machined, only the angular hole is rough machined, and a machining allowance is left in the radial direction of the angular hole, the rough machined angular hole is taken as the angular positioning reference in the subsequent part machining process, so that the part can be normally machined, and space is left for the subsequent correction of the angular hole position;

[0055] In step S2, in the machining process of the surface machining element of the part, the part is angularly positioned by the rough machined angular hole, and the machining element of the part surface is machined by taking the angular hole as the angular reference;

[0056] In step S3, the angular position degree of the machining element is measured by a measuring device, and the measuring device can be a three-coordinate measuring device;

[0057] Step S4, whether the angular position of the part surface machining element exceeds the tolerance is judged by taking the angular hole as the angular reference, when the angular position of the part surface machining element does not exceed the tolerance, the angular hole is precisely machined on the basis of the rough machining of the angular hole, and the machining allowance left in step S1 is removed, at this time, the position of the angular hole is not changed, and when the angular position of the part surface machining element exceeds the tolerance, step S5 is performed;

[0058] Step S5, the position of the angular hole on the part is corrected by taking the part axis as the rotation axis, since the machining allowance is left when the angular hole is machined in step S1, the position of the angular hole on the part can be corrected, since the part is a rotary body, correcting the position of the angular hole by taking the part axis as the rotation axis will not cause the change of the radial position relationship of the machining element, but will change the angular reference of the machining element, so as to make the machining element whose angular position exceeds the tolerance no longer exceed the tolerance, realize the effect of adjusting the angular position of the part surface machining element, increase the fault tolerance rate when the part surface machining element is machined, when the angular position of the part surface machining element exceeds the design requirement, it can be compensated within a certain range, provide a remedy method, reduce the scrap rate of the part, and improve the qualified rate of the part;

[0059] Specifically, when correcting the position of the angular hole, the correction direction of the angular hole and the correction angle are determined according to the excess direction and the excess amount of the machining element whose angular position exceeds the tolerance, when the angular hole is corrected, the angular position of all machining elements can reach the design requirement, then the angular hole is precisely machined after the position of the angular hole is corrected, when the angular hole cannot make the angular position of all machining elements reach the design requirement, because the angular hole cannot be corrected at will when the angular hole is corrected, the correction of the angular hole not only makes the angular position of some machining elements whose angular position exceeds the tolerance decrease, but also can make the angular position of other machining elements whose angular position does not exceed the tolerance increase, therefore, the correctable amount of the angular hole is not only limited by the machining allowance of the angular hole, but also limited by all machining elements on the part surface, if the correction of the angular hole cannot make the angular position of all machining elements reach the design requirement, the part is directly replaced, and the machining of the current part is ended.

[0060] Specifically, in step S5, when the correction direction of the angular hole is determined according to the excess direction and the excess amount of the machining element whose angular position exceeds the tolerance, the excess direction of the machining element whose angular position exceeds the tolerance is divided into two directions:

[0061] The first direction, the actual position of the machining element exceeds the theoretical position in the clockwise direction by taking the part axis as the rotation axis;

[0062] The second direction, the actual position of the machining element exceeds the theoretical position in the counterclockwise direction by taking the part axis as the rotation axis;

[0063] When all the angular position tolerance of the machining elements are in the first direction, the correction direction of the angular hole is clockwise around the part axis;

[0064] When all the angular position tolerance of the machining elements are in the second direction, the correction direction of the angular hole is counterclockwise around the part axis;

[0065] When the machining elements exist in the first direction and the second direction, the part is directly replaced, and the processing of the current part is ended;

[0066] The angular hole is also rotated around the part axis during the correction. If the machining elements on the part surface are larger than the theoretical position in the clockwise direction, the angular hole also needs to be corrected in the clockwise direction to reduce the angular position tolerance of the machining elements. If the angular hole is corrected in the counterclockwise direction, the angular position tolerance of the machining elements will be increased. That is, only when the angular position tolerance of all the machining elements on the part surface is in the same direction, the position of the angular hole can be corrected to reduce the angular position tolerance of all the machining elements. When the machining elements on the part surface are in the first direction and the second direction, the correction of the angular hole cannot reduce the angular position tolerance of all the machining elements.

[0067] Specifically, in step S5, the correction angle of the angular hole is calculated as follows:

[0068] S511, the moving distance of the angular hole in the direction perpendicular to the center line is calculated, the center line being a line connecting the center of the angular hole and the part axis and being perpendicular to the part axis;

[0069]

[0070] In the formula, k is the moving distance of the angular hole in the direction perpendicular to the center line, m max is the distance of the machining element with the largest angular position tolerance from the theoretical position, b is the angular position tolerance of the machining element, L1 is the distance of the machining element with the largest angular position tolerance from the part axis, and L2 is the distance of the center of the angular hole from the part axis.

[0071] As shown in Figure 2 dividing the angular position tolerance b by 2 can obtain the maximum one-sided correctable distance of the actual position of the machining element from the theoretical position under the angular position tolerance requirement. The distance m maxSubtracting b / 2 can get the distance of the machining element exceeding the angular position tolerance, and since the distance from the angular hole to the part axis and the distance from the machining element to the part axis may be different, the correction amount k of the angular hole may be different from the correction amount of the machining element, so the distance L2 between the angular hole and the part axis and the distance L1 between the machining element and the part axis are converted to get the distance that needs to be corrected for the angular hole, that is, the minimum correction amount k of the angular hole needs to be at least equal to Of course, k can be greater than the minimum correction amount.

[0072] S512, moving the angular hole in the direction perpendicular to the center line by k to get a transition angular hole, and connecting the center of the transition angular hole with the part axis to get a transition center line, the angle difference between the transition center line and the center line is the correction angle of the angular hole;

[0073] As shown in Figure 3 After obtaining the moving distance k of the angular hole in the direction perpendicular to the center line, it needs to be converted into the correction angle of the angular hole, and step S512 can convert k into the correction angle of the angular hole.

[0074] The above method realizes that in the case that the angular position tolerance of the machining element on the part surface is out of tolerance, whether the angular position tolerance of the machining element can be made to be within tolerance by correcting the angular hole can be accurately calculated, and the correction angle of the angular hole can be accurately calculated. The corrected position of the angular hole can be determined and processed at one time, and when the part cannot be compensated by correcting the angular hole, the part is directly replaced, and the rework process is shortened.

[0075] Specifically, in step S5, after determining the correction direction and correction angle of the angular hole, it is necessary to determine whether all machining elements after correction of the angular hole meet the design requirements of the angular position tolerance. Whether the angular position tolerance of other machining elements is qualified after correction of the angular hole is determined by the following method;

[0076] When the correction of the angular hole increases the angular position tolerance of the machining element

[0077]

[0078] When the correction of the angular hole decreases the angular position tolerance of the machining element

[0079]

[0080] In the formula, m1 is the distance between the actual position and the theoretical position of the machining element before correction of the angular hole, and m2 is the distance between the actual position and the theoretical position of the machining element after correction of the angular hole. When m2≤b / 2, the position of the current machining element after correction of the angular hole is qualified.

[0081] Specifically, in step S3, after measuring the angular position of the processing element, a plane diagram of the processing element and the angular hole of the part is drawn according to the projection of the part in its axial direction, so that the correction direction of the processing element can be seen more intuitively.

[0082] Example 1

[0083] like Figure 4 As shown in the figure, a transmission frame housing is shown. The engine rotor drives the passive bevel gear meshing with it to rotate through the active bevel gear, achieving the goal of changing the direction of power rotation. The three bevel gears not only have high matching accuracy, but also have strict position accuracy relative to the entire transmission mechanism. Therefore, the processing difficulty of the transmission frame housing assembled with the bevel gears is very large.

[0084] This part has three position requirements. Two of them are The inner hole of the bearing seat, its position is related to the part joint center datum GH, the support surface N and the angular datum W; The angular datum is only related to the joint center datum GH and the support surface N;

[0085] After the transmission frame housing is processed by the above processing method, the qualified rate of the transmission frame housing is significantly improved.

[0086] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method of adjusting the angular position of a surface processing element for a rotating body part, characterized by, The application discloses a method for adjusting the angular position of a part surface machining element by adjusting the angular position of an angular hole of the part. S1, rough machining of the angular hole; S2, machining of the part surface machining element using the angular hole as an angular reference; S3, measurement of the angular position of the part surface machining element by a measuring device; S4, judgment of whether the angular position of the part surface machining element is out of tolerance by taking the angular hole as an angular reference; When the angular positions of all the part surface machining elements are not out of tolerance, fine machining is performed on the basis of the rough machining of the angular hole; When the angular positions of the part surface machining elements are out of tolerance, step S5 is performed; S5, determination of the correction direction of the angular hole and calculation of the correction angle according to the out-of-tolerance direction and the out-of-tolerance amount of the part surface machining element whose angular position is out of tolerance; When the corrected angular hole can make the angular positions of all the part surface machining elements meet the design requirements, the angular hole is fine machined after the position of the angular hole is corrected; When the corrected angular hole cannot make the angular positions of all the part surface machining elements meet the design requirements, the part is directly replaced, and the machining of the current part is ended.

2. A method for adjusting the angular position of a surface processing element of a rotating part according to claim 1, characterized in that: In step S5, when the correction direction of the angular hole is determined according to the out-of-tolerance direction and the out-of-tolerance amount of the part surface machining element whose angular position is out of tolerance, the out-of-tolerance direction of the part surface machining element whose angular position is out of tolerance is divided into two directions: A first direction, in which the actual position of the part surface machining element is out of tolerance in the clockwise direction compared with the theoretical position with the part axis as the rotation axis; A second direction, in which the actual position of the part surface machining element is out of tolerance in the counterclockwise direction compared with the theoretical position with the part axis as the rotation axis; When the out-of-tolerance directions of all the part surface machining elements whose angular positions are out of tolerance are the first direction, the correction direction of the angular hole is the clockwise direction around the part axis; When the out-of-tolerance directions of all the part surface machining elements whose angular positions are out of tolerance are the second direction, the correction direction of the angular hole is the counterclockwise direction around the part axis; When the part surface machining element whose angular position is out of tolerance exists in both the first direction and the second direction, the part is directly replaced, and the machining of the current part is ended.

3. A method of adjusting the angular position of a surface machining element for a body of revolution according to claim 2, characterized in that, In step S5, the correction angle of the angular hole is calculated as follows: S511, calculation of the moving distance of the angular hole in the direction perpendicular to the center line, the center line being a line connecting the center of the angular hole and the part axis and being perpendicular to the part axis; In the formula, k is the moving distance of the angular hole in the direction of the vertical center line, m max is the distance of the angular position tolerance of the machining element from the theoretical position, b is the angular position tolerance requirement of the machining element, L1 is the distance of the angular position tolerance of the machining element from the center of the part, and L2 is the distance of the center of the angular hole from the center of the part. S512, obtaining a transition angular hole by moving the angular hole in the direction perpendicular to the center line by k, and connecting the center of the transition angular hole and the part axis to obtain a transition center line, the angle difference between the transition center line and the center line being the correction angle of the angular hole.

4. A method of adjusting the angular position of a surface machining element for a body part according to claim 3, characterized in that: In step S5, after the correction direction and the correction angle of the angular hole are determined, whether the angular positions of other part surface machining elements are qualified after the correction of the angular hole is judged by the following method: When the correction of the angular hole increases the angular position of the part surface machining element When the correction of the angular hole decreases the angular position of the part surface machining element In the formula, m1 is the distance between the actual position and the theoretical position of the part surface machining element before the correction of the angular hole, and m2 is the distance between the actual position and the theoretical position of the part surface machining element after the correction of the angular hole, and when m2≤b / 2, the position of the current part surface machining element after the correction of the angular hole is qualified.

5. The method of claim 1, wherein: In step S1, when the angular hole is rough machined, a machining allowance is left in the radial direction of the angular hole.

6. The method of claim 1, wherein: In step S3, the angular position degree of the machining element is measured by a three-coordinate measuring device.

7. The method of claim 1, wherein: In step S3, after the angular position degree of the machining element is measured, a planar figure of the machining element and the angular hole of the part is drawn according to the projection of the part in the axial direction thereof.

Images