CN113756984B - Process curing method for heavy parts of engine - Google Patents
Process curing method for heavy parts of engine Download PDFInfo
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- CN113756984B CN113756984B CN202111249349.5A CN202111249349A CN113756984B CN 113756984 B CN113756984 B CN 113756984B CN 202111249349 A CN202111249349 A CN 202111249349A CN 113756984 B CN113756984 B CN 113756984B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0095—Constructing engine casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention provides a method for solidifying heavy parts of an engine by a process, which comprises the following steps: controlling processing equipment to perform trial manufacturing processing on the raw material for multiple times according to a preset processing technology and a preset processing technology in the initial processing scheme to obtain mechanical parts; verifying the attribute characteristics of the mechanical parts; determining whether the mechanical parts meet design indexes or not based on the attribute characteristics of the mechanical parts, and if the attribute characteristics of the mechanical parts meet the design indexes, determining preset processing technology, processing equipment and raw materials as the content of process curing; and if the attribute characteristics of the mechanical part do not meet the design indexes, optimizing one or more of the preset processing technology, the processing equipment and the raw materials. The invention has the beneficial effects that: data collection is carried out on the whole process of the trial machining of the complex and important parts of the engine, so that the stability of all factors in the machining process of the parts is kept to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of process curing, and particularly relates to a process curing method for heavy parts of an engine.
Background
In order to ensure the consistency of the processing result of the component as much as possible, the process of fixing the process method of the processing process of the component needs to be process curing, which can be specifically understood as follows: each process step of a process and each step of the process are fixed and include processing equipment conditions, raw materials used, processing methods and processing environmental conditions.
The curing process of the existing process is as follows: the method comprises the steps of firstly compiling an initial processing technology, after a technological rule is compiled and approved, trial processing is carried out on parts, after no problem exists in processing, the initial processing technology is subjected to state marking, namely, the technology is solidified, in actual production, the initial processing technology is generally used as a white technology (the white technology is printed by adopting common A4 paper and is white background black characters), and after no problem exists in processing, the white technology is converted into a blue technology (the white technology is printed by transparent parchment paper and is processed by a printing method to be light blue background, and the blue technology of A4 specification of dark blue characters can prevent manual self-printing from replacing related contents).
For the processing technology of parts with simple structure and low dimensional precision, the processing procedures of the technology design are less, the technology method is more universal and mature, and the consistency of the processing results of the parts, such as common bolts, nuts and bottom plate parts, can be basically ensured by adopting the existing curing method. Moreover, even if the parts are damaged, the maintainability of an engine product is less influenced, and the functions of the product can be recovered by quickly replacing parts.
For the parts with complex structure and heavy functions, due to the complex structure and high requirement on the dimensional precision, the processing scheme has certain uniqueness and originality and does not have a mature scheme for reference, so that some processing problems can not be fully exposed in the short-time processing and using processes of the parts, such as: (1) the engine body of the large-scale engine belongs to a large-scale complex box body part, a complex water path inner cavity and an oil path inner cavity are arranged in the engine body, the machining process is complex, meanwhile, the part is a core component of the engine, the using working condition is complex, some problems cannot be exposed through a test after machining, and the problems can be exposed after long-time use; (2) the crankshaft part of the large high-speed engine bearing extremely large complex alternating torque in work and provided with a complex inner cavity is also a core part of the engine, the process design is complex, the problem exposure period is long, once the part is damaged in the actual use process, the product basically belongs to a scrapped state for one engine, the maintenance cost is high, the possible maintenance cost is equivalent to the cost of newly purchasing one product and even higher than the cost of a new product, and meanwhile, if the crankshaft part is used in special fields, such as air, underwater and other environments, irreparable harm can be caused to people.
Then, for the processing method of the heavy parts of the engine, if the original process curing method is adopted, since the technical level and the processing experience of a single enterprise have certain limitations, all links and possible situations cannot be considered comprehensively, and therefore, the original process curing method has certain limitations on the complex heavy parts.
Disclosure of Invention
In view of the above, the present invention is directed to overcoming the above-mentioned disadvantages of the prior art and providing a method for curing the process of heavy parts of an engine.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for carrying out technical solidification on heavy parts of an engine comprises the following steps:
controlling processing equipment to perform trial manufacturing processing on the raw material for multiple times according to a preset processing technology and a preset processing technology in the initial processing scheme to obtain mechanical parts;
verifying the attribute characteristics of the mechanical parts;
determining whether the mechanical part meets the design index or not based on the attribute characteristics of the mechanical part, and if the attribute characteristics of the mechanical part meet the design index, determining a preset processing technology, processing equipment and raw materials as the content of process curing; and if the attribute characteristics of the mechanical part do not meet the design indexes, optimizing one or more of the preset processing technology, the processing equipment and the raw materials.
Further, the number of the mechanical parts is multiple;
and under the condition that the number of the mechanical parts meeting the design index is determined to be larger than a preset qualified threshold value, determining the preset processing technology, the processing equipment and the raw materials at the moment as the process curing content for producing the mechanical parts.
Further, after the process curing content is determined, the method further comprises the following steps:
recording a preset processing technology, processing equipment and raw materials to obtain a processing trial-production record table;
and carrying out state marking on the processing trial-manufacture recording table to obtain a processing method recording table marked as a curing state.
Further, the mechanical component comprises at least one of: the engine comprises an engine body with a water path inner cavity and an oil path inner cavity and an engine crankshaft with an inner cavity.
Further, the preset processing technology comprises at least one of the following steps: stamping, welding, coating and final assembly.
Further, the preset processing technology comprises at least one of the following: laser welding, argon arc welding, cutting, casting, stretching and grinding.
Further, the processing equipment comprises at least one of: laser cutting machine, punch press, grinding machine, lathe, milling machine, drilling machine, boring machine.
Further, the raw materials include at least one of: metals, metal oxides, alloys, stainless steel.
Further, the attribute characteristics of the mechanical part include at least one of: metallographic structure, hardness, size.
Compared with the prior art, the invention has the following advantages:
the method for solidifying the process of the heavy parts of the engine carries out data collection on the whole process of trial machining of the complex heavy parts of the engine so as to keep the stability of various factors in the machining process of the parts to the maximum degree and simultaneously reduce the problem of large quality of the parts of the production and machining machine caused by the limitations of the technical level and the machining experience of a single enterprise to the maximum degree.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for curing an engine heavy component process according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, a method for curing an engine heavy component process includes the following steps:
a method for carrying out technological curing on heavy parts of an engine comprises the following steps:
controlling processing equipment to perform multiple times of trial processing on the raw material according to a preset processing technology and a preset processing technology in the initial processing scheme to obtain a mechanical part;
verifying the attribute characteristics of the mechanical parts;
determining whether the mechanical part meets the design index or not based on the attribute characteristics of the mechanical part, and if the attribute characteristics of the mechanical part meet the design index, determining a preset processing technology, processing equipment and raw materials as the content of process curing; if the attribute characteristics of the mechanical parts do not meet the design indexes, optimizing one or more of a preset processing technology, processing equipment and raw materials; and determining the optimized processing technology, processing equipment and raw materials as the content of process curing until the attribute characteristics of the mechanical parts meet the design indexes.
The number of the mechanical parts is multiple; and under the condition that the number of the mechanical parts meeting the design index is determined to be larger than a preset qualified threshold value, determining the preset processing technology, the processing equipment and the raw materials at the moment as the process curing content for producing the mechanical parts.
After the process curing content is determined, the method further comprises the following steps: recording a preset processing technology, processing equipment and raw materials to obtain a processing trial-production record table; and carrying out state marking on the processing trial-manufacture recording table to obtain the processing method recording table marked as a curing state.
The mechanical parts comprise at least one of the following: the engine comprises an engine body with a water path inner cavity and an oil path inner cavity and an engine crankshaft with an inner cavity.
The preset processing technology comprises at least one of the following steps: stamping, welding, coating and final assembly.
The preset processing technology comprises at least one of the following steps: laser welding, argon arc welding, cutting, casting, stretching and grinding.
The processing equipment comprises at least one of the following: laser cutting machine, punch press, grinding machine, lathe, milling machine, drilling machine, boring machine.
The raw materials include at least one of: metals, metal oxides, alloys, stainless steel.
The attribute characteristics of the mechanical part include at least one of: metallographic structure, hardness, size.
The working process of the embodiment is as follows:
an initial processing scheme is formulated, a temporary processing technological procedure (generally for single piece processing) or a trial-manufacture technological procedure (generally for small-batch processing) is compiled, processing equipment is controlled to carry out trial-manufacture processing on raw materials for multiple times according to a preset processing technology and a preset processing technology in the initial processing scheme, the process can be a blank process, and the technological procedure is the basis of the processing scheme of the mechanical part;
after single trial production or small-batch trial production is carried out for multiple rounds, the attribute characteristics of the machined mechanical parts are inspected, and the metallographic structure, the hardness, the size and the like required by the design of the mechanical parts are recorded and inspected. Comparing the results with design indexes (required contents on all drawings) of mechanical parts, and continuing to optimize the processing method for the design indexes which do not meet the design requirements until the processing effect meets the design indexes and the processing qualification rate is relatively stable, namely reaches a preset qualification threshold value, and at the moment, incorporating the process improvement contents into a compiled temporary or trial-manufacture process as a processing method for process solidification;
compiling a processing trial-production summary of the complex critical parts, wherein the summary includes attribute characteristic requirements (namely all contents required on a drawing) of the mechanical parts, design of a mechanical part processing technology (mainly explaining arrangement of processing procedures, and particularly explaining procedure arrangement with processing difficulty), processing conditions of the mechanical parts (including processing batch, quantity, processing qualification rate condition, problems in the processing process, optimization and improvement condition of difficulty in the processing process), final qualification rate stable condition and the like; meanwhile, the use of the process of "four new" is explained, and if the process of "four new" is not explained, the case of adopting the four new process, new technology, new material and new equipment is mainly explained if the process of "four new" is not explained. For processing enterprises, the four new concepts are relative concepts, and the four new concepts are new when used for the first time, and the new concepts mean that the basis and experience of use are not used, so that generally speaking, certain use and operation risks exist, and special attention is needed. A pilot summary can be made as in Table 1, including some of the points of the description.
Table 1 summary table
The new process and the new technology generally complement each other: for enterprises, a new process is adopted as long as the enterprise uses the processing method for the first time; the technology used for the first time is the new technology. For example: an enterprise adopts laser welding in welding for the first time, so that the laser welding technology is a new technology for the enterprise, and a corresponding processing method for parts needs to be established when the new technology is adopted, and the processing method is a new process.
New materials: refers to materials used by enterprises for the first time, such as: a business never processed 40Cr material metal, and if it first processed the material, the material would be a new material for the business.
The new equipment comprises the following steps: refers to a new type of equipment used by enterprises for the first time, for example: the laser cutting machine tool is never used in production by a certain enterprise, the equipment is used for processing a certain part, and the enterprise purchases one machine for processing in order to complete the processing, so the equipment belongs to new equipment for the enterprise.
In addition, the following steps can be added to the scheme:
determining the qualification and the requirement of processing personnel and inspection personnel, determining the literacy of the personnel which can meet the requirements of processing operation and inspection operation according to the difficulty degree of each process in the processing process, and curing the requirements of operators and inspection personnel, including the labor types (such as lathes, milling workers, processing center operators and the like) and the skill levels (technicians, middle-level technicians, high-level technicians and the like) of the personnel;
determining the minimum requirement standard of the processing equipment, and determining the minimum requirement standard of the equipment capable of meeting the processing requirements according to the analysis and judgment of the processing qualified condition of the mechanical parts in the processing process, such as: type/model and level of precision, while providing relevant proofs.
And combining the process of the primary curing corresponding to the mechanical parts meeting the preset qualified threshold value, organizing experts to carry out scheme evaluation, giving a conclusion on process curing, if the evaluation is not passed, continuing to optimize the processing method, and if the evaluation is passed, curing the process and related control. After the evaluation is passed, the following steps are carried out:
changing the process specification of the white book into a blue book process by performing blue turning treatment;
and carrying out controlled identification on the technological process after bluing according to a use mode, such as: the central data room is marked with a deposit book 'A', the processing branch technical room is marked with a deposit book 'B', and the production field operators are marked with a deposit book 'C'; the inspector checks the use case labeled "D"; in the using process of each mode, the respective memory is strictly used, so that the problems of uncontrollable process files, loss and unclear responsibility after damage caused by mutual borrowing of the process files are prevented;
confirming control elements in the process of executing the process by determining working procedures, personnel and equipment;
and (4) carrying out production according to the procedures, personnel and equipment confirmed by the review, not allowing random change, and carrying out equivalent qualification and capability review if the change is required.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A method for technological solidification of heavy parts of an engine is characterized by comprising the following steps: the method comprises the following steps:
controlling processing equipment to perform trial manufacturing processing on the raw material for multiple times according to a preset processing technology and a preset processing technology in the initial processing scheme to obtain mechanical parts;
verifying the attribute characteristics of the mechanical parts;
determining whether the mechanical parts meet design indexes or not based on the attribute characteristics of the mechanical parts, and if the attribute characteristics of the mechanical parts meet the design indexes, determining preset processing technology, processing equipment and raw materials as the content of process curing; and if the attribute characteristics of the mechanical part do not meet the design indexes, optimizing one or more of the preset processing technology, the processing equipment and the raw materials.
2. The method of claim 1, wherein the method comprises the steps of: the number of the mechanical parts is multiple;
and under the condition that the number of the mechanical parts meeting the design index is determined to be larger than a preset qualified threshold value, determining the preset processing technology, the processing equipment and the raw materials at the moment as the process curing content for producing the mechanical parts.
3. The method of claim 1, wherein after determining the process curing content, the method further comprises:
recording a preset processing technology, processing equipment and raw materials to obtain a processing trial-production record table;
and carrying out state marking on the processing trial-manufacture recording table to obtain a processing method recording table marked as a curing state.
4. The method of claim 1, wherein the mechanical component comprises at least one of: the engine comprises an engine body with a water path inner cavity and an oil path inner cavity and an engine crankshaft with an inner cavity.
5. The method of claim 1, wherein the predetermined machining process comprises at least one of: stamping, welding, coating and final assembly.
6. The method of claim 1, wherein the predetermined processing technique comprises at least one of: laser welding, argon arc welding, cutting, casting, stretching and grinding.
7. The method of claim 1, wherein the processing equipment comprises at least one of: laser cutting machine, punch press, grinding machine, lathe, milling machine, drilling machine, boring machine.
8. The method of claim 1, wherein the raw materials include at least one of: metal oxides, alloys, stainless steel.
9. The method of claim 1, wherein the property of the mechanical component comprises at least one of: metallographic structure, hardness, size.
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| CN202111249349.5A CN113756984B (en) | 2021-10-26 | 2021-10-26 | Process curing method for heavy parts of engine |
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| CN202111249349.5A CN113756984B (en) | 2021-10-26 | 2021-10-26 | Process curing method for heavy parts of engine |
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| DE102016213609A1 (en) * | 2016-07-25 | 2018-01-25 | Eos Gmbh Electro Optical Systems | Method and device for determining component quality |
| WO2020076285A1 (en) * | 2018-10-08 | 2020-04-16 | Hewlett-Packard Development Company, L.P. | Validating object model data for additive manufacturing |
| CN111950080A (en) * | 2020-07-29 | 2020-11-17 | 中国第一汽车股份有限公司 | Vehicle body lightweight design method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016213609A1 (en) * | 2016-07-25 | 2018-01-25 | Eos Gmbh Electro Optical Systems | Method and device for determining component quality |
| WO2020076285A1 (en) * | 2018-10-08 | 2020-04-16 | Hewlett-Packard Development Company, L.P. | Validating object model data for additive manufacturing |
| CN111950080A (en) * | 2020-07-29 | 2020-11-17 | 中国第一汽车股份有限公司 | Vehicle body lightweight design method |
Non-Patent Citations (2)
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| 商用车试制新品总装验证方法探究;徐海洋;《汽车实用技术》;20170430(第08期);全文 * |
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