CN114227154B

CN114227154B - Processing method of frame part corner

Info

Publication number: CN114227154B
Application number: CN202111480431.9A
Authority: CN
Inventors: 卢永; 周华; 胡庆武; 冯峻; 王旭
Original assignee: AVIC Guizhou Aircraft Co Ltd
Current assignee: AVIC Guizhou Aircraft Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2023-06-30
Anticipated expiration: 2041-12-07
Also published as: CN114227154A

Abstract

The invention discloses a processing method of a corner of a frame part, which comprises the following steps: (1) single sash preparation; (2) The method comprises the steps of (1) identifying corners in a single sash, and (3) processing a plurality of corners in the single sash; (4) model modification; (5) a plurality of frames are prefabricated; (6) a plurality of corner identifications; (7) processing a plurality of corners. The method can process all the corners of the vertical bottom surface simultaneously by using one instruction, can reduce a large number of repeated operations, greatly improves programming efficiency, enables corner residue cleaning to become easy, and is very simple and convenient for changing programs or adjusting processing parameters after model change.

Description

Processing method of frame part corner

Technical Field

The invention belongs to the technical field of numerical control machining, and particularly relates to a machining method for corners of frame parts.

Background

The parts on the aircraft are required to be light and have better strength and rigidity, so that the frame parts serving as the support of the aircraft framework comprise a plurality of frames, the corners of the frames of the parts cannot be too large, otherwise, the weight of the parts can be overweight, in rough machining and middle machining, in order to improve the machining efficiency, a large-diameter cutter is generally selected, and the corner diameter of the right-angle frames is large, so that the allowance exists for each corner, and the clearance is needed. But the frames of the frame parts are more, and the corners are more. Typically, there are four corners of a single sash, and if there are more than one hundred sashes in the part, there are more than four hundred corners, and if there are sashes on both sides, there are eight hundred corners. While the margin for clearing is not large, the programming effort is quite burdensome. The programming process of each corner requires clicking a function instruction, selecting a guide curve and a bottom plane, selecting a start point and an end point of a tool path, and constructing proper points, lines and planes by assistance, wherein the start point and the end point are not exactly proper, and finally, the programming path is calculated. If one rotation angle needs 0.5 minutes, eight hundred rotation angles need 4-5 hours under the uninterrupted condition, and a large number of repeated operations are carried out, so that the operation is very tedious, long in time consumption and easy to miss. The procedure is also long, and if the part is changed, the procedure is also quite cumbersome to find and change. If the parameters such as the feeding mode or the offset are to be modified, the parameters need to be modified one by one, which is very inconvenient. Even though the parts are symmetrical, the left and right parts can be mirrored, in order to ensure that the mirrored program is forward milling, the original program is copied once, then the original program is changed into reverse milling one by one, and then the mirror images are carried out, so that the time is saved, the structures of a plurality of parts are not completely symmetrical, and even if the mirror images are mirrored, the program operation cannot be carried out.

The CATIA has a Rework function, which is to process the frame by a Rework instruction, then identify the corner of the frame processed by the Rework by a PrismaticRework Area (Rework corner area) function, and finally calculate the corner identified by the Rework when the Rework is performed. In this way, all corners in a sash can be processed simultaneously with one instruction. The large-diameter cutter is selected during the first pocket processing, and the small-diameter cutter is selected during the second pocket processing, so that the corner cleaning processing of all the corners of the vertical bottom surface in the same frame can be easily completed. However, even if the corners in the same sash can be processed simultaneously, it is not easy and simple to process, identify and calculate more than one hundred times before processing and then calculating more than one hundred times. Therefore, improvements to existing processing methods are urgently needed to meet processing requirements.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a processing method of a corner of a frame part.

The processing method of the frame part corner comprises the following steps:

(1) Single sash preparation: in CATIA, a pocket function is used, and a single sash on a pair of frame part models is used for processing;

(2) Identification of the corners within a single sash: identifying a plurality of corners in the single sash processed in the step (1) by using a prism reworking area function;

(3) Processing a plurality of corners in a single sash: calculating at the corner identified in the step (2) by using a pocket function, and replacing the first cutter with the second cutter so as to process a plurality of corners in the sash, wherein the first cutter is larger than the second cutter in size;

(4) Model modification: extracting a frame part model, and arranging grooves on ribs in the model by using the groove function, wherein the height of the grooves is the same as that of the ribs, so that the bottoms of the frames are communicated and are on the same plane;

(5) Preprocessing a plurality of grids: using a pocket function in CATIA, and processing a plurality of frames in the modified model in the step (4) by using a cutter;

(6) A plurality of corner identifications: identifying a plurality of corners in the plurality of frames processed in the step (5) by using a prism reworking area function;

(7) A plurality of corner processing: and (3) carrying out operation on the corner identified in the step (6) by using a pocket function, and replacing the first cutter with the second cutter so as to process all the corners.

Compared with the prior art, the processing method of the frame part corner has the beneficial effects that: the method can process all the corners of the vertical bottom surface simultaneously by using one instruction, can reduce a large number of repeated operations, greatly improves programming efficiency, enables corner residue cleaning to become easy, and is very simple and convenient for changing programs or adjusting processing parameters after model change.

Drawings

The invention is described in further detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a frame part processed by the present invention;

FIG. 2 is a schematic diagram of the present method for processing a single sash using a polling command;

FIG. 3 is a schematic diagram of a structure for identifying a single sash corner using a prism reworkarea function;

FIG. 4 is a schematic view of a structure for processing a single sash corner using a pocket instruction;

FIG. 5 is a schematic diagram of a structure of a frame processed by a modeling instruction after model modification;

FIG. 6 is a schematic diagram of a structure for identifying multiple corners using a prism Rework area function after model modification;

FIG. 7 is a schematic diagram of a plurality of corners processed with a polarizing instruction after model modification.

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.

It should be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The processing method of the frame part corner comprises the following steps:

(1) Single sash preparation: as shown in fig. 2, a pocket function is used in CATIA, and a cutter with the diameter of 20mm is used for processing a single sash on a frame part (shown in fig. 1) model;

(2) Identification of the corners within a single sash: as shown in fig. 3, the prism reworkarea function is used to identify the corners in the single sash processed in step (1);

(3) Processing a plurality of corners in a single sash: as shown in fig. 4, the turning angle identified in the step (2) is calculated by using a pocket function, and the cutter is replaced by a cutter with a diameter of 12mm, so that a plurality of turning angles R6 in the frame are machined;

(4) Model modification: as shown in fig. 5, extracting a frame part model, forming grooves on ribs in the model by using groove functions, wherein the height of the grooves is the same as that of the ribs, so that the bottoms of the frames are communicated, if the bottoms of the frames have height differences on the same plane, the height of a low surface can be increased by using the thickness function in CATIA to be level with a high surface, and finally, locally supplementing the corner of the low surface;

(5) Preprocessing a plurality of grids: processing the multiple frames in the modified model in the step (4) by using a cutter with the diameter of 20mm in the CATIA by using a pocket function;

(6) A plurality of corner identifications: as shown in fig. 6, the prism reworkarea function is used to identify the corners in the multiple panes processed in step (5);

(7) A plurality of corner processing: as shown in fig. 7, the turning angle identified in step (6) is calculated by using the turning function, and the tool is replaced with a tool having a diameter of 12mm, thereby machining all the turning angles R6.

Other aspects of the invention are well known to those skilled in the art.

The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments, and any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical substance of the present invention falls within the protection scope of the present invention.

Claims

1. The processing method of the frame part corner is characterized by comprising the following steps:

(3) Processing a plurality of corners in a single sash: calculating the corner identified in the step (2) by using a pocket function, and replacing the first cutter with the second cutter so as to process a plurality of corners in the sash;

(4) Model modification: extracting a frame part model, and forming grooves on ribs in the model by using a groove function;

2. The method for machining corners of frame parts according to claim 1, wherein the first cutter is larger than the second cutter.

3. The method for machining corners of frame parts according to claim 2, wherein the first cutter has a diameter of 20mm, the second cutter has a diameter of 12mm, and the radius of the corners is R6.

4. The method for manufacturing corners of frame parts according to claim 3, wherein the height of the grooves is equal to the height of the ribs.