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

Abstract

The invention discloses a rotary body part surface machining element angular position degree adjusting method in the technical field of rotary body part machining, according to the method, when an angular hole is machined, the machining allowance is reserved in the radial direction of the angular hole, so that the angular hole can be corrected within a certain range, and due to the fact that the part is a rotary body, the machining precision is greatly improved. Correcting the position of the angular hole with the axis of the part as the rotating shaft does not cause the change of the radial position relation of the machining elements, but changes the angular reference of the machining elements, so that the machining elements with the out-of-tolerance angular position degree of the surface of the part do not exceed the out-of-tolerance any more, and the effect of adjusting the angular position degree of the machining elements on the surface of the part is achieved. The error-tolerant rate during part surface machining element machining is increased, compensation can be carried out within a certain range according to the part surface machining element angular position tolerance out-of-tolerance design requirement, a remedial method is provided, the rejection rate of parts is reduced, and the qualification rate of the parts is increased.

Description

Technical Field

[0001] The invention relates to the technical field of rotating body part processing, in particular to a method for adjusting the angular position of a rotating body part surface processing element. Background Art

[0002] When machining the surface elements of rotating parts, angular holes are generally used to ensure the angular position of the machining elements.

[0003] Traditionally, when machining the surface machining elements of rotating parts, the angular holes on the surface of the parts are usually finish-machined first, and then the parts are positioned with the angular holes as the angular reference and the surface machining elements of the parts are machined. When machining the surface machining elements of the parts, since the position of the angular holes is fixed, the machining elements are usually rough-machined first. If the angular position of the machining elements is qualified, the machining elements are then fine-machined. If the angular position of the machining elements is out of tolerance, the angular position of the machining elements needs to be corrected and then fine-machined. If the angular position of the machining elements is out of tolerance after fine-machining, the parts will be judged as unqualified. When multiple machining elements need to be machined on the surface of the part, in the process of rotating and changing the angle of the part, it is inevitable that the angular positioning of the parts will be inaccurate. For some parts with very high precision requirements (such as aircraft engine transmission frame housing), the machining difficulty is very large and the yield rate is low.

[0004] Based on this, the present invention designs a method for adjusting the angular position of surface machining elements of a rotating part to solve the above-mentioned problem. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a method for adjusting the angular position of a hole in a rotating part, characterized in that the angular reference of the part is changed by adjusting the angular hole position of the part, and the angular position of the surface processing element of the part is adjusted, comprising the following steps:

[0006] S1, angular hole roughing;

[0007] S2, using the angular hole as the angular reference to process the surface processing elements of the part;

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

[0009] S4, using the angular hole as the angular reference, judging whether the angular position of the surface processing element of the part is out of tolerance;

[0010] When the angular position of the surface processing elements of the parts are within tolerance, fine processing is carried out on the basis of rough processing of the angular holes;

[0011] When the angular position of the surface processing element of the part exceeds the tolerance, step S5 is performed;

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

[0013] When the correction of the angular hole can make the angular position of all machining elements meet the design requirements, the angular hole position is corrected and then the angular hole is finely machined;

[0014] When the correction of the angular hole cannot make the angular position of all the processing elements meet the design requirements, the part is directly replaced and the processing of the current part is ended.

[0015] As a further solution of the present invention, in step S5, when determining the correction direction of the angular hole according to the deviation direction and deviation amount of the processing element with the deviation in angular position, the deviation direction of the processing element with the deviation in angular position is divided into two directions:

[0016] In the first direction, the actual position of the processing element exceeds the theoretical position in the clockwise direction with the part axis as the rotation axis;

[0017] In the second direction, the actual position of the processing element exceeds the theoretical position in the counterclockwise direction with the part axis as the rotation axis;

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

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

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

[0021] As a further solution of the present invention, in step S5, the correction angle calculation method of the angular hole is as follows:

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

[0023]

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

[0025] S512, move the angle hole by k in the direction perpendicular to the center line to obtain a transition angle hole, and connect the center of the transition angle 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 angle 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 judge 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] Wherein, m1 is the distance between the actual position and the theoretical position of the machining element before the angular hole correction, and m2 is the distance between the actual position and the theoretical position of the machining element after the angular hole correction. When m2≤b / 2, the position of the current machining 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 reserved 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 of the part and the angular hole is drawn according to the projection of the part in the axial direction thereof.

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

[0036] This method reserves machining allowance in the radial direction of the angular hole when machining the angular hole, so that the angular hole can be corrected within a certain range. Since the part is a rotating body, correcting the position of the angular hole with the axis of the part as the rotation axis will not cause changes in the radial position relationship of the machining elements, but will change the angular reference of the machining elements, so that the machining elements with angular position deviations on the surface of the part are no longer out of tolerance. Compared with the traditional method of correcting machining elements with position deviations, correcting angular holes can realize the simultaneous correction of multiple machining elements, and the correction of angular holes is simpler and can be used in actual rotating parts. During production, if the angular position is out of tolerance, the direction of the deviation will usually be in one direction as a whole. Therefore, it is more convenient to adjust the angular position of the processing element by correcting the angular hole in actual application. At the same time, the angular holes and processing elements on the surface of the part can be rough-machined first, and then the processing elements and angular holes can be fine-machined respectively, so that the angular position of the processing element can be corrected twice, increasing the fault tolerance rate when processing the processing elements on the surface of the part. When the angular position of the processing elements on the surface of the part exceeds the design requirements, compensation can be made within a certain range, providing a remedial method, reducing the scrap rate of parts, and improving the qualified rate of parts.

[0037] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

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

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

[0042] Figure 4 Schematic diagram of the transmission frame housing in Example 1. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0044] See also Figure 1-4The present invention provides a technical solution: a method for adjusting the angular position of a hole of a rotating part, which changes the angular reference of the part by adjusting the angular hole position of the part, and adjusts the angular position of the surface processing element of the part, comprising the following steps:

[0045] S1, angular hole roughing;

[0046] S2, using the angular hole as the angular reference to process the surface processing elements of the part;

[0047] S3, measuring the angular position of the processing element by a measuring device;

[0048] S4, using the angular hole as the angular reference, judging whether the angular position of the surface processing element of the part is out of tolerance;

[0049] When the angular position of the surface processing elements of the parts are within tolerance, fine processing is carried out on the basis of rough processing of the angular holes;

[0050] When the angular position of the surface processing element of the part exceeds the tolerance, step S5 is performed;

[0051] S5, determining the correction direction of the angular hole and calculating the correction angle according to the deviation direction and deviation amount of the machining element with the deviation in angular position;

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

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

[0054] First, in step S1, when machining the angular hole, 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 used as the angular positioning reference in the subsequent part machining process, ensuring that the part can be machined normally while leaving space for the subsequent angular hole position correction;

[0055] Step S2, during the machining process of the machining elements on the part surface, the rough-machined angular holes are used to perform angular positioning on the part, and the machining elements on the part surface with the angular holes as angular references are machined;

[0056] Step S3, measuring the angular position of the processing element by a measuring device, and the measuring device may be a three-coordinate measuring device;

[0057] Step S4, using the angular hole as the angular reference, judging whether the angular position of the processing element on the surface of the part is out of tolerance. When the angular position of the processing element on the surface of the part is within the tolerance, fine machining is performed on the basis of rough machining of the angular hole to remove the remaining machining allowance in step S1. At this time, the position of the angular hole is not changed. When the angular position of the processing element on the surface of the part is out of tolerance, step S5 is performed;

[0058] Step S5, correcting the position of the angular hole on the part with the axis of the part as the rotation axis. Since the machining allowance is retained when machining the angular hole in step S1, the position of the angular hole on the part can be corrected. Since the part is a rotating body, correcting the position of the angular hole with the axis of the part as the rotation axis will not cause a change in the radial position relationship of the machining element, but will change the angular reference of the machining element, so that the machining element with an out-of-tolerance angular position on the surface of the part is no longer out-of-tolerance, achieving the effect of adjusting the angular position of the machining element on the surface of the part, increasing the fault tolerance rate when machining the machining element on the surface of the part, and when the angular position of the machining element on the surface of the part exceeds the design requirement, compensation can be made within a certain range, providing a remedial method, reducing the scrap rate of the part, and improving the qualified rate of the part;

[0059] Specifically, when correcting the position of the angular hole, the correction direction and correction angle of the angular hole are determined according to the deviation direction and deviation amount of the machining elements with angular position deviation, and the correction angle is calculated. When the correction of the angular hole can make the angular position of all machining elements meet the design requirements, the angular hole is finely machined after the position of the angular hole is corrected. When the correction of the angular hole cannot make the angular position of all machining elements meet the design requirements, because the angular hole cannot be corrected at will when correcting the angular hole, the correction of the angular hole will not only reduce the angular position of some machining elements with angular position deviation, but may also increase the angular position of other machining elements with angular position deviation. Therefore, the correctable amount of the angular hole is not only limited by the machining allowance of the angular hole, but also by all machining elements on the surface of the part. If the correction of the angular hole cannot make the angular position of all machining elements meet the design requirements, the part is directly replaced to end the machining of the current part.

[0060] Specifically, the processing elements may be holes, grooves, holes, bosses, etc.

[0061] Specifically, in step S5, when determining the correction direction of the angular hole according to the deviation direction and deviation amount of the machining element with the angular position deviation, the deviation direction of the machining element with the angular position deviation is divided into two directions:

[0062] In the first direction, the actual position of the processing element exceeds the theoretical position in the clockwise direction with the part axis as the rotation axis;

[0063] In the second direction, the actual position of the processing element exceeds the theoretical position in the counterclockwise direction with the part axis as the rotation axis;

[0064] When the deviation direction of all machining elements with angular position deviation is the first direction, the correction direction of the angular hole is clockwise around the axis of the part;

[0065] When the deviation direction of all machining elements with angular position deviation is the second direction, the correction direction of the angular hole is counterclockwise around the axis of the part;

[0066] When the processing element has both an angular position error in the first direction and an angular position error in the second direction, the part is directly replaced and the processing of the current part is terminated;

[0067] When correcting the angular hole, it is also rotated with the part axis as the rotation axis. If the surface machining element of the part exceeds the tolerance in the clockwise direction compared to the theoretical position, the angular hole also needs to be corrected clockwise to reduce the angular position of the machining element. If the angular hole is corrected counterclockwise, the angular position of the machining element will increase. In other words, only when the angular position of all machining elements on the surface of the part exceeds the tolerance direction can the angular position of all machining elements be reduced by correcting the position of the angular hole. When the surface machining elements of the part exceed the tolerance in the first direction and the second direction, the angular position of all machining elements cannot be reduced by correcting the angular hole.

[0068] Specifically, in step S5, the correction angle calculation method of the angular hole is as follows:

[0069] S511, calculating the moving distance of the angle hole in the direction perpendicular to the center line, where the center line is a line connecting the center of the angle hole and the axis of the part and perpendicular to the axis of the part;

[0070]

[0071] Where k is the moving distance of the angle hole in the direction perpendicular to the center line, m max is the distance from the processing element with the largest angular position to the theoretical position, b is the angular position tolerance requirement of the processing element, L1 is the distance from the processing element with the largest angular position to the axis of the part, and L2 is the distance from the center of the angular hole to the axis of the part;

[0072] like Figure 2 As shown, dividing the angular position tolerance b by 2 can obtain the maximum correctable distance between the actual position of the machining element and the theoretical position under the angular position tolerance requirement, and the distance m between the machining element with the largest angular position and the theoretical position is used. maxSubtracting b / 2 will give the distance that the processing element with the largest angular position exceeds the angular position tolerance range. Since the distance from the angular hole to the axis of the part may be different from the distance from the processing element to the axis of the part, the correction amount k of the angular hole may be different from the correction amount of the processing element. Therefore, it is necessary to convert the distance L2 between the angular hole and the axis of the part and the distance L1 between the processing element and the axis of the part to obtain the distance that the angular hole needs to be corrected. In other words, the minimum correction amount k of the angular hole needs to be at least equal to Of course k can be larger than the minimum correction amount.

[0073] S512, moving the angular hole by k in a direction perpendicular to the center line to obtain a transition angular hole, and connecting the center of the transition angular hole with the axis of the part to obtain a transition center line, and the angle difference between the transition center line and the center line is the correction angle of the angular hole;

[0074] like Figure 3 As shown, 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. Step S512 can convert k into the correction angle of the angular hole.

[0075] The above method can realize the accurate calculation of whether the angular position of the processing element on the surface of the part can be corrected to the same degree by correcting the angular hole when the angular position of the processing element is out of tolerance, and the accurate calculation of the correction angle of the angular hole. The correction position of the angular hole can be determined and processed in place at one time. At the same time, when the angular position of the processing element cannot be compensated by correcting the angular hole, the part can be directly replaced to shorten the rework process.

[0076] Specifically, in step S5, after determining the correction direction and correction angle of the angular hole, it is necessary to determine whether all processing elements after the angular hole correction meet the design requirements of the angular position, and judge whether the angular position of other processing elements after the angular hole correction is qualified by the following method;

[0077] When the angular position of the machining element increases due to the correction of the angular hole

[0078]

[0079] When the angular position of the machining element is reduced by correcting the angular hole

[0080]

[0081] Wherein, m1 is the distance between the actual position and the theoretical position of the machining element before the angular hole correction, and m2 is the distance between the actual position and the theoretical position of the machining element after the angular hole correction. When m2≤b / 2, the position of the current machining element after the angular hole correction is qualified.

[0082] Specifically, in step S3, after measuring the angular position of the processing element, the plane graphics of the processing element and the angular hole of the part are 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.

[0083] Example 1

[0084] like Figure 4 As shown in the figure, a transmission frame housing is shown in the figure. The engine rotor drives the passive bevel gear meshing with it to rotate through the active bevel gear to achieve 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 bevel gears is very large;

[0085] This part has three position requirements. Two of them are The inner hole of the bearing seat, its position is related to the joint center datum GH, the support surface N and the angular datum W of the parts; The angular datum is only related to the joint center datum GH and the support surface N;

[0086] After the transmission frame housing is processed by the above processing method, the qualified rate of the transmission frame housing is significantly improved.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adjusting the angular position of a hole in a rotating part, characterized in that: The angular reference of the part is changed by adjusting the position of the angular hole of the part, and the angular position of the processing element on the surface of the part is adjusted, including the following steps: S1, angular hole roughing; S2, using the angular hole as the angular reference to process the surface processing elements of the part; S3, measuring the angular position of the processing element by a measuring device; S4, using the angular hole as the angular reference, judging whether the angular position of the surface processing element of the part is out of tolerance; When the angular position of the surface processing elements of the parts are within tolerance, fine processing is carried out on the basis of rough processing of the angular holes; When the angular position of the surface processing element of the part exceeds the tolerance, step S5 is performed; S5, determining the correction direction of the angular hole and calculating the correction angle according to the deviation direction and deviation amount of the machining element with the deviation in angular position; When the correction of the angular hole can make the angular position of all machining elements meet the design requirements, the angular hole position is corrected and then the angular hole is finely machined; When the correction of the angular hole cannot make the angular position of all the processing elements meet the design requirements, the part is directly replaced and the processing 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 determining the correction direction of the angular hole according to the deviation direction and deviation amount of the machining element with the angular position deviation, the deviation direction of the machining element with the angular position deviation is divided into two directions: In the first direction, the actual position of the processing element exceeds the theoretical position in the clockwise direction with the part axis as the rotation axis; In the second direction, the actual position of the processing element exceeds the theoretical position in the counterclockwise direction with the part axis as the rotation axis; When the deviation direction of all machining elements with angular position deviation is the first direction, the correction direction of the angular hole is clockwise around the axis of the part; When the deviation direction of all machining elements with angular position deviation is the second direction, the correction direction of the angular hole is counterclockwise around the axis of the part; When the processing element has an angular position error in the first direction and an angular position error in the second direction at the same time, the part is directly replaced and the processing of the current part is ended.

3. A method for adjusting the angular position of a surface processing element of a rotating part according to claim 2, characterized in that: In step S5, the correction angle calculation method of the angular hole is as follows: S511, calculating the moving distance of the angle hole in the direction perpendicular to the center line, where the center line is a line connecting the center of the angle hole and the axis of the part and perpendicular to the axis of the part; Where k is the moving distance of the angle hole in the direction perpendicular to the center line, m max is the distance from the processing element with the largest angular position to the theoretical position, b is the angular position tolerance requirement of the processing element, L1 is the distance from the processing element with the largest angular position to the axis of the part, and L2 is the distance from the center of the angular hole to the axis of the part; S512, move the angle hole by k in the direction perpendicular to the center line to obtain a transition angle hole, and connect the center of the transition angle 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 angle hole.

4. A method for adjusting the angular position of a surface processing element of a rotating part according to claim 3, characterized in that: In step S5, after determining the correction direction and correction angle of the angular hole, the following method is used to judge whether the angular position of other processing elements after the angular hole correction is qualified; When the angular position of the machining element increases due to the correction of the angular hole When the angular position of the machining element is reduced by correcting the angular hole Wherein, m1 is the distance between the actual position and the theoretical position of the machining element before the angular hole correction, and m2 is the distance between the actual position and the theoretical position of the machining element after the angular hole correction. When m2≤b / 2, the position of the current machining element after the angular hole correction is qualified.

5. The method for adjusting the angular position of a surface processing element of a rotating part according to claim 1, characterized in that: In step S1, when rough machining the angular hole, a machining allowance is left in the radial direction of the angular hole.

6. The method for adjusting the angular position of a surface processing element of a rotating part according to claim 1, characterized in that: In step S3, the angular position of the processing element is measured by a three-coordinate measuring device.

7. The method for adjusting the angular position of a surface processing element of a rotating part according to claim 1, characterized in that: In step S3, after measuring the angular position of the processing element, the plane graphics of the processing element and the angular hole of the part are drawn according to the projection of the part in the axial direction.

Images