CN114211206B - Method for processing multi-cavity casting cabin body of revolving body - Google Patents
Method for processing multi-cavity casting cabin body of revolving body Download PDFInfo
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- CN114211206B CN114211206B CN202111582735.6A CN202111582735A CN114211206B CN 114211206 B CN114211206 B CN 114211206B CN 202111582735 A CN202111582735 A CN 202111582735A CN 114211206 B CN114211206 B CN 114211206B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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Abstract
The invention discloses a method for processing a multi-cavity casting cabin body of a revolving body, which comprises the following steps: s1: detecting the inner and outer molded surfaces of the casting by a laser scanning method, and comparing a theoretical model with a scanning result to obtain residual data of each part of the inner and outer molded surfaces; s2: then, the allowance data of the selected position is utilized to align the machining reference of the part and scribe; s3: aligning a datum line on a milling machine, and reserving and processing an excircle and an end face; s4: and (4) aligning the outer circle machined by the milling machine by using a lathe for subsequent machining. According to the invention, the milling machine processing establishes the processing reference for the lathe processing, so that the problem that the lathe cannot align the reference line is solved, meanwhile, a reliable processing reference can be used, the efficient turning method is adopted for processing, the trial cutting time and the equipment occupation are reduced, and the method is a reliable and convenient processing method.
Description
Technical Field
The invention belongs to the technical field of cabin section machining, and relates to a method for machining a multi-cavity casting cabin body of a revolving body.
Background
The casting cabin section has deformation after casting, and the problems of insufficient wall thickness, insufficient appearance allowance, misplacement of the accommodating cavity and the like are easily caused. The multiple-cavity cabin section needs to simultaneously consider the appearance, the wall thickness and the size precision of each cavity during processing, and has processing difficulty. The laser scanning technology can be adopted to establish the benchmark before processing, but the revolving body cabin section generally adopts turning processing with high processing efficiency, and the benchmark established by scanning data cannot be aligned on a lathe, so that the benchmark can not be established by effectively utilizing the scanning data.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: the machining method has high reliability and can effectively control the machining precision of the casting, the datum line is aligned by the milling machine and is transferred to the lathe, the problem that the lathe cannot directly utilize the datum line is solved, and the machining precision control of the multi-cavity complex casting cabin section of the revolving body is further realized.
(II) technical scheme
In order to solve the technical problem, the invention provides a method for processing a multi-cavity casting cabin of a revolving body, which comprises the following steps:
s1: detecting the inner and outer molded surfaces of the casting by a laser scanning method, and comparing a theoretical model with a scanning result to obtain residual data of each part of the inner and outer molded surfaces;
s2: then, the allowance data of the selected position is utilized to align the part processing reference and scribe;
s3: aligning a datum line on a milling machine, and processing an excircle and an end face by allowance;
s4: and (4) aligning the outer circle machined by the milling machine by using a lathe for subsequent machining.
In step S2, the rule for determining the selected position is set as: two points are selected, which are not vertices, on the same straight line of the lumen, as far as possible, and with as little surface relief as possible.
In the step S2, 8 points of residual data at positions right above, below, right left and right of the front end of the course close to the end surface in the inner cavity, 8 points of residual data at positions right above, below, right left and right of the rear end, residual data of the side wall of the cavity and residual data of the inner wall of the end frame are selected.
In the step S2, the part processing datum comprises a horizontal datum, a symmetrical datum, a course positioning datum and an angle direction datum.
In step S2, selecting a horizontal reference and a symmetrical reference: and selecting the positions right above, right below, right left and right of the inner cavity with the front end close to the end surface, the positions right above, right below, right left and right of the inner cavity with the rear end close to the end surface, and taking the residual data of the inner cavities at 8 point positions as reference values to determine a horizontal datum and a symmetrical datum.
In the step S2, selecting a course reference: and the course selects the allowance at the end frame or the numerical value of the existing plane as a reference value to determine a processing standard.
In step S2, selecting an angular direction reference: and determining the angular direction reference by taking the allowance of the side wall of the cavity of the cabin section as the reference.
In the step S2, drawing lines by a bench worker according to the allowance reference value data, and determining a machining standard; when scribing, supporting the excircle, and correctly matching 8 point margins at the positions right above, right below, right left and right of the front end and the positions right above, right below, right left and right of the rear end; and determining the angle direction according to the allowance of the side wall of the accommodating cavity, and marking a horizontal datum line and a symmetrical plane line on the excircle of the part after determining the datum.
Step S3, placing the part on a three-axis milling machine with the end face facing downwards, performing meter making on the milling machine from top to bottom by using a main shaft and lever meter combination, aligning a horizontal reference line and a symmetrical plane line on an excircle, adjusting the posture of the part, and keeping the alignment error within 0.1; during machining, the front end face and the rear end face are milled flat, and a section of excircle is machined in a reserved amount to establish a reference for a subsequent lathe; and placing the machined end face on a platform, determining a course datum by using the allowance of the side wall of the containing cavity, and marking the course datum.
And S4, aligning the end face and a section of excircle machined by the milling machine on a lathe, reserving and machining the whole excircle, confirming that the machining reference of the part is correct by detecting wall thickness data of all parts in the machining process, performing reference adjustment in real time when deviation occurs, and finally machining the part in place.
(III) advantageous effects
According to the method for processing the multi-cavity casting cabin of the revolving body, the laser scanning detection method is used before processing, the allowance condition, the deficiency condition and the like of complex casting parts are mastered, and compared with a method for centering the allowance of the characteristic point adopted by a conventional centering method, the method for processing the multi-cavity casting cabin of the revolving body has the advantages that the processing precision of the parts can be guaranteed better by considering the allowance data of all positions, and a reliable processing reference can be obtained. In practical application, the method is used for marking and aligning, a milling machine is used for establishing a machining reference for lathe machining, the problem that a lathe cannot align the reference line is solved, meanwhile, a reliable machining reference can be used, efficient turning method machining is adopted, machining trial cutting time and equipment occupation are reduced, and the method is a reliable and convenient machining method.
Drawings
FIG. 1 is a flow chart of the process of the present invention.
Fig. 2 is a schematic view of the structure of the cabin.
FIG. 3 is a front view of the datum.
FIG. 4 is a side view of a datum.
Detailed Description
In order to make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be made in conjunction with the accompanying drawings and examples.
Referring to fig. 1, the invention provides a method for processing a multi-cavity casting cabin section of a revolving body, which comprises the following steps:
s1: detecting the inner and outer molded surfaces of the casting by a laser scanning method, and comparing a theoretical model with a scanning result to obtain residual data of each part of the inner and outer molded surfaces;
s2: then, the allowance data of the selected position is utilized to align the part datum and scribe;
s3: aligning a datum line on a milling machine, and reserving and processing an excircle and an end face;
s4: and (4) aligning the outer circle machined by the milling machine by using a lathe for subsequent machining.
In step S2, the laser scanning data amount is large, and only the margin data at a specific position is selected for reference for convenience of the operation method. As shown in fig. 2 to 4, when establishing the reference by referring to the scan data, two points with the same straight line of the cavity, as far as possible and as small surface relief as possible should be selected, but the top point is not selected because the cast part usually has large surface relief in the edge and fillet area and the selection error is large. Therefore, the characteristic positions can generally select 8 points of residual data at positions right above, below, right left and right of the front end of the course close to the end surface in the inner cavity, right above, below, right left and right of the rear end, the residual data of the side wall of the cavity, the residual data of the inner wall of the end frame and the like. The allowance data of the inner cavity is selected as much as possible, because the casting generally has no allowance in the inner cavity and large allowance on the outer side, when the appearance of the casting is processed through allowance, the deviation of reference alignment can be found in time and adjusted in time; if the shape data is selected, the accuracy of the datum alignment cannot be judged according to the inner cavity allowance data after the shape is processed.
The processing reference of the cabin part relates to a horizontal reference, a symmetrical reference, a course positioning reference and an angle direction reference: a) Selecting a horizontal standard and a symmetrical standard: selecting a reference as much as possible, selecting positions right above, right below, right left and right of the inner cavity with the front end close to the end surface and positions right above, right below, right left and right of the inner cavity with the rear end close to the end surface, and determining a horizontal reference and a symmetrical reference by using the residual data of the inner cavity at 8 point positions as reference values; b) Selecting a course reference: and the course selects the allowance at the end frame or the numerical value of the existing plane as a reference value to determine a processing standard. c) Selecting an angular direction reference: in order to avoid deflection errors when the reference of the revolving body part is established, the angular direction reference is determined by taking the allowance of the side wall of the containing cavity of the cabin section as the reference.
Specifically, the bench worker scribes based on the residual reference value data to establish a machining standard. When in scribing, the excircle is supported, and 8 points at the positions right above, right below, right left and right of the front end and the positions right above, right below, right left and right of the rear end are matched with the allowance correctly; and determining the angle direction by the allowance of the side wall of the cavity. After the reference is determined, a horizontal reference line and a symmetrical plane line are marked on the excircle of the part.
And S3, placing the part on a three-axis milling machine with the end face facing downwards, performing meter reading from top to bottom on the milling machine by using the combination of the main shaft and the lever meter, aligning a horizontal reference line and a symmetrical plane line on the excircle, adjusting the posture of the part, and keeping the alignment error within 0.1. During machining, the front end face and the rear end face are milled flat, a section of excircle is machined in a reserved amount, and a reference is established for a subsequent lathe. And further, marking a course datum line, placing the machined end face on a platform, determining a course datum by using the allowance of the side wall of the cavity, and marking the course datum line.
And S4, aligning the end face and a section of excircle machined by the milling machine on a lathe, reserving and machining the whole excircle, confirming that the machining reference of the part is correct by detecting wall thickness data of each part in the machining process, and performing a small amount of reference adjustment when deviation occurs to avoid the reference deviation of the part. And finally, machining the part in place.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (2)
1. A method for processing a multi-cavity casting cabin body of a revolving body is characterized by comprising the following steps:
s1: detecting the inner and outer molded surfaces of the casting by a laser scanning method, and comparing a theoretical model with a scanning result to obtain residual data of each part of the inner and outer molded surfaces;
s2: then, the allowance data of the selected position is utilized to align the machining reference of the part and scribe;
s3: aligning a datum line on a milling machine, and reserving and processing an excircle and an end face;
s4: aligning the excircle processed by the milling machine by using a lathe, and performing subsequent processing;
in step S2, the rule for determining the selected position is set as: selecting two points which are on the same straight line of the inner cavity, are as far as possible and have as small surface relief as possible, wherein the two points are not top points;
in the step S2, 8 points of residual data at positions right above, right below, right left and right of the front end of the course close to the end surface in the inner cavity, 8 points of residual data at positions right above, right below, right left and right of the rear end, residual data of the side wall of the cavity and residual data of the inner wall of the end frame are selected;
in the step S2, the part processing datum comprises a horizontal datum, a symmetrical datum, a course datum and an angle direction datum;
in step S2, selecting a horizontal reference and a symmetrical reference: selecting the positions right above, right below, right left and right of the inner cavity with the front end close to the end surface, the positions right above, right below, right left and right of the inner cavity with the rear end close to the end surface, and taking the residual data of the inner cavities at 8 point positions as reference values to determine a horizontal reference and a symmetrical reference;
in the step S2, selecting a course reference: the course selects the allowance at the end frame or the numerical value of the existing plane as a reference value, and determines a processing standard;
in step S2, selecting an angular direction reference: determining an angular direction reference by taking the allowance of the side wall of the containing cavity of the cabin section as a reference;
in the step S2, drawing lines by a bench worker according to the allowance reference value data, and determining a machining standard; when scribing, supporting the excircle, and correctly matching 8 point margins at the positions right above, right below, right left and right of the front end and the positions right above, right below, right left and right of the rear end; determining the angle direction according to the allowance of the side wall of the containing cavity, and marking a horizontal datum line and a symmetrical plane line on the excircle of the part after determining the datum;
step S3, placing the part on a three-axis milling machine with the end face facing downwards, performing meter making on the milling machine from top to bottom by using a main shaft and lever meter combination, aligning a horizontal reference line and a symmetrical plane line on an excircle, adjusting the posture of the part, and keeping the alignment error within 0.1 mm; during machining, the front end face and the rear end face are milled flat, and a section of excircle is machined in a reserved amount to establish a reference for a subsequent lathe; and placing the machined end face on a platform, determining a course datum by using the allowance of the side wall of the containing cavity, and marking the course datum.
2. The method for processing the multi-cavity casting capsule body of the revolving body according to claim 1, wherein in step S4, the end face and a section of the outer circle processed by the milling machine are aligned on a lathe, the whole outer circle is processed in a reserved amount, the processing reference of the part is confirmed to be correct by detecting the wall thickness data of each part during processing, the reference adjustment is carried out in real time when deviation occurs, and finally the part is processed in place.
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| CN114800056A (en) * | 2022-04-30 | 2022-07-29 | 徐德富 | Method for machining and mounting high-form-position precision part |
| CN117282995B (en) * | 2023-11-24 | 2024-02-02 | 天津航天长征火箭制造有限公司 | Method for detecting and processing machining allowance of space spinning box bottom and electronic equipment |
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Inventor after: Lin Lin Inventor after: Chen Xingzu Inventor after: Ding Guozhi Inventor after: Yang Hongqing Inventor after: Xu Baode Inventor before: Lin Lin Inventor before: Chen Xingzu Inventor before: Xu Baode |