CN114227154A

CN114227154A - Method for processing corner of frame part

Info

Publication number: CN114227154A
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: 2022-03-25
Anticipated expiration: 2041-12-07
Also published as: CN114227154B

Abstract

The invention discloses a method for processing a corner of a frame part, which comprises the following steps: (1) preprocessing a single sash; (2) the corner identification in the single sash (3) the processing of a plurality of corners in the single sash; (4) modifying the model; (5) preprocessing a plurality of sashes; (6) a plurality of corner identifications; (7) and (5) processing a plurality of corners. The invention can process all the corners vertical to the bottom surface by one instruction, can reduce a large amount of repeated work, greatly improve the programming efficiency, lead the residual clearance of the corner to be easy, change the program after the model is changed or adjust the processing parameter to be very simple and convenient, and the programming method for processing the multiple corners has higher practical value in the actual numerical control processing.

Description

Method for processing corner of frame part

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 part on the aircraft requires not only to be light but also to have better intensity and rigidity, so frame class part that the skeleton of the aircraft supported as will contain a lot of sash, and the corner of part sash also can not be too big, otherwise part weight can be overweight, and when rough machining and medium processing, in order to improve machining efficiency, generally choose the cutter of major diameter, the corner diameter of right angle sash is just big then, just so has every corner and all has the surplus, needs to clear away. But the frame type parts have a plurality of frames and more corners. Generally, four corners of one sash are provided, if more than one hundred sashes are arranged on a part, four or more corners are provided, and if the sashes are arranged on the front side and the back side, eight or nine hundred corners are provided. Although the margin for clearing is not large, the programming effort is quite burdensome. The programming process of each corner needs to click a function instruction, then a guide curve and a bottom plane are selected, then a starting point and an end point of a tool path are selected, the starting point and the end point are not necessarily right, and the starting point and the end point are assisted to construct a proper point, line and plane, and finally the operation of the programming path is carried out. If one corner needs 0.5 minute, eight nine hundred corners need 4-5 hours under the condition of no break, and a large number of repeated operations are carried out, so that the operation is very complicated, the consumed time is long, and the omission is easy. The procedure is also lengthy and finding and changing the procedure is quite cumbersome if the parts are changed. If the parameters such as feed mode or offset are to be modified, the parameters need to be modified one by one, which is very inconvenient. Even if the parts are symmetrical, the left part and the right part can be mirrored, in order to ensure that the program after mirroring is forward milling, the original program is copied once, then the backward milling is changed one by one, and then the mirroring is carried out, so that the time is not saved, moreover, the structures of a plurality of parts are not completely symmetrical, and even if some parts are mirrored, the program operation cannot be carried out.

The CATIA has a Rework function, which is to process a frame by a Pocketing (box processing) instruction of a part, identify the corner of the frame processed by Pocketing (box processing) by a prism Rework Area function, and calculate the corner identified by Rework when Pocketing (box processing) processing is performed. Thus, all corners within a sash can be machined simultaneously with one command. The tool with the large diameter is selected during the first time of Pocketing (box-shaped processing), and the tool with the small diameter is selected during the second time of Pocketing (box-shaped processing), so that the corner cleaning processing of all the corners of the vertical bottom surface in the same sash can be easily completed. However, even if the inner corners of the same sash can be processed simultaneously, the one hundred sashes are not easy and simple to be processed, identified and calculated for more than one hundred times. Therefore, there is an urgent need to improve the existing processing methods to meet the processing requirements.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a method for processing corners of frame parts.

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

(1) preprocessing a single sash: processing a single sash on a frame part model by using a cutter by using a Pocketing function in the CATIA;

(2) corner identification within a single sash: identifying a plurality of corners in the single frame processed in the step (1) by using a prism Rework Area function;

(3) processing a plurality of corners in a single sash: operating the corners identified in the step (2) by using a Pocketing function, and replacing the first cutter with a second cutter so as to process a plurality of corners in the sash, wherein the size of the first cutter is larger than that of the second cutter;

(4) and (3) modifying the model: extracting a frame part model, forming grooves in ribs in the model by using a groove function, wherein the heights of the grooves are the same as those of the ribs, so that the bottoms of all the sashes are communicated and are on the same plane;

(5) preprocessing a plurality of sashes: processing a plurality of frames in the model modified in the step (4) by using a cutter I by using a Pocketing function in the CATIA;

(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 Rework Area function;

(7) processing a plurality of corners: and (4) performing operation at the operation position of the corner identified in the step (6) by using a Pocketing function, and replacing the first cutter with a second cutter so as to process all corners.

Compared with the prior art, the processing method of the frame part corner has the beneficial effects that: the invention can process all the corners vertical to the bottom surface by one instruction, can reduce a large amount of repeated work, greatly improve the programming efficiency, lead the residual clearance of the corner to be easy, change the program after the model is changed or adjust the processing parameter to be very simple and convenient, and the programming method for processing the multiple corners has higher practical value in the actual numerical control processing.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

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

FIG. 2 is a schematic structural diagram of a single sash processed by a Pocketing instruction;

FIG. 3 is a schematic diagram of a structure for identifying a single lattice corner using the prism Rework Area function;

FIG. 4 is a schematic structural diagram of a single cell corner being processed by a Pocketing command;

FIG. 5 is a schematic structural diagram of a sash processed by Pocketing commands after model modification;

FIG. 6 is a schematic structural diagram of a prism Rework Area function for identifying a plurality of corners after model modification;

FIG. 7 is a diagram illustrating the processing of multiple corners by Pocketing commands after model modification.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It is to 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 machining method of the frame part corner comprises the following steps:

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

(2) corner identification within a single sash: as shown in fig. 3, a prism Rework Area function is used to identify a plurality of corners in the single frame processed in step (1);

(3) processing a plurality of corners in a single sash: as shown in fig. 4, using the Pocketing function, the corner identified in step (2) is calculated, and the tool is replaced with a tool having a diameter of 12mm, thereby processing a plurality of corners R6 inside the frame;

(4) and (3) modifying the model: as shown in fig. 5, a frame part model is extracted, grooves are formed in ribs in the model by using a groove function, the height of each groove is the same as that of each rib, so that the bottoms of all the sashes are communicated and are on the same plane, if the bottom surfaces of all the sashes have height difference, the height of a low surface can be increased by using a thickness function in the CATIA to enable the low surface to be flush with the high surface, and finally, corners of the low surface are partially processed;

(5) preprocessing a plurality of sashes: processing a plurality of lattices in the model modified in the step (4) by using a cutter with the diameter of 20mm by using a Pocketing function in the CATIA;

(6) a plurality of corner identifications: as shown in fig. 6, using a prism Rework Area function to identify corners in the frames processed in step (5);

(7) processing a plurality of corners: as shown in fig. 7, the calculation is performed at the corner identified in step (6) by using the Pocketing function, and the tool is replaced with a tool having a diameter of 12mm, thereby machining all the corners R6.

Other parts of the invention not described in detail are conventional techniques known to the person skilled in the art.

The scope of the present invention is not limited to the technical solutions disclosed in the embodiments, and any modifications, equivalent substitutions, improvements, etc. made to the above embodiments according to the technical spirit of the present invention fall within the scope of the present invention.

Claims

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

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

(4) and (3) modifying the model: extracting a frame part model, and forming grooves on ribs in the model by using a groove function;

2. The method for processing the corner of the frame part as claimed in claim 1, wherein the size of the first cutter is larger than that of the second cutter.

3. The method for processing the corner of the frame part as claimed in claim 2, wherein the diameter of the first cutter is 20mm, the diameter of the second cutter is 12mm, and the radius of the corner is R6.

4. The method for processing the corner of a frame part as claimed in claim 3, wherein the height of the groove is the same as the height of the rib.