CN114653996B - Machining method for key structural workpiece of automobile roof outer plate stamping die - Google Patents
Machining method for key structural workpiece of automobile roof outer plate stamping die Download PDFInfo
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- CN114653996B CN114653996B CN202210407242.7A CN202210407242A CN114653996B CN 114653996 B CN114653996 B CN 114653996B CN 202210407242 A CN202210407242 A CN 202210407242A CN 114653996 B CN114653996 B CN 114653996B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C1/00—Milling machines not designed for particular work or special operations
- B23C1/002—Gantry-type milling machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
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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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
-
- 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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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention relates to the technical field of processing technology, and provides a processing method of a workpiece with a key structure of an automobile roof outer plate stamping die, which comprises the following steps: placing a workpiece on a processing machine; rough machining is carried out on the working area; performing first semi-finishing on a processing area of the workpiece; clamping and downwards compressing two ends of a workpiece by using a gasket at the bottom of the workpiece, and inversely arching and compressing the workpiece so as to reduce the bending degree of the arch structure; heating the processing area of the workpiece to remove the bottom gasket; re-clamping and compacting the cooled workpiece, performing secondary semi-finishing on the treatment area, and removing a hardening layer generated by heat treatment on the treatment area; and loosening the two ends of the workpiece again, and finally carrying out finish machining on the processing area of the workpiece, so that the machining allowance of the workpiece is reduced to zero. The invention can efficiently remove the machining allowance, reduce the power of heat treatment, protect the cutter and reduce the deformation of the workpiece.
Description
Technical Field
The invention relates to the technical field of machining processes, in particular to a machining method for a workpiece with a key structure of an automobile stamping die.
Background
In the automobile appearance covering parts, the covering parts at the top are simply called as a roof outer plate in the covering part industry, the part modeling of the roof outer plate determines the key die structures at two sides of the stamping die structure, the structure can deform in manufacture in the die industry, and the precision of producing the stamped roof outer plate is difficult to meet the requirement, so that process change is required to be carried out on the stamping die key structure workpiece, the deformation is eliminated, and the assembly requirement is met.
Disclosure of Invention
The invention aims to provide a processing method of a workpiece with a key structure of an automobile roof outer plate stamping die, which can efficiently reduce the deformation of the workpiece, reduce the heat treatment power, protect a cutter and reduce the deformation.
In order to solve the technical problems, the invention provides a processing method of a workpiece with a key structure of an automobile stamping die, which is used for processing a workpiece with an arch structure and a processing allowance; the method comprises the following steps:
placing a workpiece on a processing machine table, wherein the arch structure of the workpiece faces downwards, and the top surface of the workpiece is a processing area;
clamping and downwards compressing two ends of a workpiece, and roughly machining a treatment area to reduce the machining allowance of the workpiece;
performing primary semi-finishing on a processing area of the workpiece to reduce the machining allowance of the workpiece;
clamping and loosening two ends of a workpiece, adding a gasket at the bottom, clamping again, and pressing downwards to perform inverted arch-shaped pressing on the workpiece, so that the bending degree of an arch structure is reduced;
heating the processing area of the workpiece, loosening two ends of the workpiece after the workpiece is completely naturally cooled, and removing the bottom gaskets;
clamping the two ends of the workpiece again, performing secondary semi-finishing on the cooled processing area of the workpiece, removing an oversteering layer generated by heat treatment on the processing area, and reducing the machining allowance of the workpiece;
loosening two ends of the workpiece to naturally extend the workpiece;
clamping the two ends of the workpiece, and finishing the processing area of the workpiece to reduce the processing allowance of the workpiece to zero.
Preferably, the processing area of the workpiece is rough, semi-finished and finished by a numerical control planer type milling machine.
Preferably, the processing area of the workpiece is rough machined so that the machining allowance of the workpiece is 1mm; performing primary semi-finishing on a processing area of the workpiece to ensure that the machining allowance of the workpiece is 0.3-0.5 mm; and performing secondary semi-finishing on the processing area of the cooled workpiece to ensure that the machining allowance of the workpiece is 0.1-0.25 mm.
Preferably, when clamping and downwards compressing the two ends of the workpiece and inversely arching compressing the workpiece, a gasket is arranged between the processing machine table and the workpiece.
Preferably, the gasket is provided with three pieces which are uniformly distributed on the bottom surface of the workpiece.
Preferably, the thickness of the gasket is 0.2-0.5 mm.
Preferably, the processing area of the workpiece is heated by a flame thrower, and the flame thrower uniformly heats the processing area in a moving way.
Preferably, the moving speed of the flame thrower is 0.5-1 m/h.
Preferably, clamping is carried out on two ends of a workpiece through a clamping device, the clamping device comprises a connecting rod, a supporting block and a pressing block, the connecting rod and the supporting block are respectively arranged on the processing machine table, the pressing block is slidably arranged on the connecting rod, and the pressing block is abutted to the workpiece to compress the workpiece.
Preferably, the clamping device further comprises a nut, the nut is slidably sleeved on the connecting rod, and the nut abuts against the top surface of the pressing block to limit the pressing block.
The invention has the following beneficial effects:
the processing method of the workpiece with the key structure of the automobile roof outer plate stamping die reduces the cutter abrasion of each processing, reduces the power consumption of heat treatment, reduces the deformation of the workpiece after the heat treatment, improves the precision of the workpiece after finish machining, and meets the use requirement when the deformation is in the required range in the subsequent assembly and debugging.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a processing method of a workpiece with a key structure of an automobile roof outer plate stamping die according to an embodiment of the invention.
Reference numerals:
1. a workpiece; 2. clamping device; 3. a flame thrower; 4. a gasket; 5. a processing machine.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1, a preferred embodiment of the present invention provides a method for processing a workpiece having an arch structure and a machining allowance, which is a key structure of an automobile roof outer panel stamping die; the method comprises the following steps:
placing the workpiece 1 on a processing machine table, wherein the arch structure of the workpiece 1 faces downwards, and the top surface of the workpiece 1 is a processing area;
clamping and downwards compressing two ends of the workpiece 1, and roughly machining a treatment area to reduce the machining allowance of the workpiece 1;
performing primary semi-finishing on the processing area of the workpiece 1, so that the machining allowance of the workpiece 1 is reduced;
clamping and loosening the two ends of the workpiece 1, adding a gasket at the bottom, clamping again, and pressing downwards, and performing inverted arch pressing on the workpiece 1 to reduce the bending degree of the arch structure;
heating the treatment area of the workpiece 1, loosening the two ends of the workpiece 1 after the workpiece 1 is completely naturally cooled, and removing the bottom gaskets;
clamping the two ends of the workpiece 1 again, performing secondary semi-finishing on the processing area of the cooled workpiece 1, removing an oversteering layer generated by heat treatment on the processing area, and reducing the machining allowance of the workpiece 1;
loosening two ends of the workpiece 1 to naturally extend the workpiece;
clamping is carried out on two ends of the workpiece 1, and finish machining is carried out on a processing area of the workpiece 1, so that the machining allowance of the workpiece 1 is reduced to zero.
Before each processing, clamping, leveling correction and compaction are needed, which is a basic operation before processing; the processing machine table comprises a numerical control gantry milling machine table and a heat treatment table, wherein the workpiece 1 is subjected to heat treatment at the heat treatment table, and rough machining, semi-finish machining and finish machining are performed at the numerical control gantry milling machine table; and the workpiece 1 needs to be clamped again and leveled every time the workpiece is transferred to the numerical control gantry milling machine.
In addition, after the rough machining of the workpiece 1 is completed, the two ends of the workpiece 1 need to be slightly loosened, so that the workpiece 1 is stress-relieved, and then clamped again for the subsequent first semi-finish machining.
Simultaneously, the workpiece 1 is clamped by the gasket first and then the workpiece 1 can be deformed in advance; the second semi-finishing must be followed by a release of both ends of the workpiece 1 to allow natural extension, since the hardened layer after heat treatment is removed during the second semi-finishing, the stress is released resulting in a small deformation of the workpiece, and this amount of deformation, if not released from the clamping, would result in direct deformation after finishing.
When the workpiece 1 is subjected to heat treatment, the lower arch is tilted, and the inverted arch clamping aims at pre-straightening and inverted operation, so that the deformation after heat treatment is reduced. See table 1 for details;
TABLE 1
As can be seen from table 1, in comparative examples 1 to 8, only comparative example 4 satisfies the requirement of high processing accuracy without the inverted arch-shaped pressing, while from test examples 1 to 8, it can be seen that, when the processing margin after the first finishing is greater than 0.5, test examples 1 to 3 remain defects after processing in the processing region in the subsequent heating treatment, and when the processing margin after the first finishing is less than 0.3, test examples 7 and 8 subsequently damage the workpiece 1 (the deformation amount exceeds the finishing residual amount), only test examples 4 to 6 satisfy the processing requirement, and the requirement of precision is low, and the yield is high.
In some preferred embodiments of the invention, the processing area of the workpiece 1 is rough, semi-finished and finished by means of a numerically controlled planer.
In some preferred embodiments of the invention, the treatment area of the workpiece 1 is rough machined such that the machining allowance of the workpiece 1 is 1mm; performing primary semi-finishing on the processing area of the workpiece 1 to ensure that the machining allowance of the workpiece 1 is 0.3-0.5 mm; and performing secondary semi-finishing on the processing area of the cooled workpiece 1 so that the machining allowance of the workpiece 1 is 0.1-0.25 mm.
Specifically, the disposable processing amount is not too large and too fast, so that the damage of subsequent processing to the workpiece 1 body is avoided, the workpiece 1 is directly scrapped, in addition, the disposable processing amount is not too slow, the subsequent processing procedures are not increased, and the processing efficiency is reduced.
In some preferred embodiments of the present invention, when clamping and pressing down both ends of the workpiece 1, and performing inverted arch pressing on the workpiece 1, a spacer 4 is disposed between the processing machine 5 and the workpiece 1.
In some preferred embodiments of the present invention, the pad 4 is provided with three pads uniformly distributed on the bottom surface of the workpiece 1.
In some preferred embodiments of the invention, the thickness of the spacer 4 is 0.2-0.5 mm.
In some preferred embodiments of the present invention, the treatment area of the workpiece 1 is heated by using the flame thrower 3, and the flame thrower 3 uniformly heats the treatment area in a moving manner. Specifically, the flame thrower 3 consumes less power, and the moving speed and the moving range thereof are easier to control.
In some preferred embodiments of the present invention, the movement speed of the torch 3 is 0.5 to 1m/h.
In some preferred embodiments of the present invention, two ends of the workpiece 1 are clamped by the clamping device 2, where the clamping device 2 includes a connecting rod, a supporting block and a pressing block, the connecting rod and the supporting block are respectively disposed on the processing machine 5, the pressing block is slidably disposed on the connecting rod, and the pressing block abuts against the workpiece 1 to compress the workpiece 1.
In some preferred embodiments of the present invention, the clamping device 2 further includes a nut, the nut is slidably sleeved on the connecting rod, and the nut abuts against the top surface of the pressing block to limit the pressing block.
In summary, the preferred embodiment of the present invention provides a method for machining an automotive workpiece 1, which is compared with the prior art:
the machining method of the automobile workpiece 1 reduces the cutter abrasion of each machining, reduces the power consumption of heat treatment, simultaneously, the inverted arch shape before the heat treatment is shaped in advance, the deformation of the workpiece after the heat treatment is reduced, the precision of the workpiece after finish machining is improved, and the deformation is in the required range in the subsequent assembly and debugging, so that the use requirement is met.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A processing method of a key structure workpiece of an automobile roof outer plate stamping die is used for processing a workpiece (1) which is in an arch structure and has machining allowance; the method is characterized by comprising the following steps:
placing the workpiece (1) on a processing machine table (5), wherein the arch structure of the workpiece (1) faces downwards, and the top surface of the workpiece (1) is a processing area;
clamping and downwards compressing two ends of the workpiece (1), and roughly machining a treatment area to reduce the machining allowance of the workpiece (1);
performing a first semi-finishing of the treatment area of the workpiece (1) so that the machining allowance of the workpiece (1) is reduced;
clamping and loosening two ends of a workpiece (1), adding gaskets at the bottom, clamping again, and pressing downwards to perform inverted arch-shaped pressing on the workpiece (1) so as to reduce the bending degree of an arch structure;
heating the treatment area of the workpiece (1), loosening the two ends of the workpiece (1) after the workpiece (1) is completely naturally cooled, and removing the bottom gaskets;
clamping the two ends of the workpiece (1) again, performing secondary semi-finishing on the processing area of the cooled workpiece (1), removing an oversteering layer generated by heat treatment on the processing area, and reducing the machining allowance of the workpiece (1);
loosening two ends of the workpiece (1) to naturally extend the workpiece;
clamping the two ends of the workpiece (1), and finishing the processing area of the workpiece (1) to reduce the processing allowance of the workpiece (1) to zero.
2. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 1, which is characterized by comprising the following steps: and (3) carrying out rough machining, semi-finishing machining and finishing machining on the treatment area of the workpiece (1) through a numerical control planer type milling machine.
3. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 1, which is characterized by comprising the following steps: rough machining is carried out on a treatment area of the workpiece (1) so that the machining allowance of the workpiece (1) is 1mm; performing primary semi-finishing on a treatment area of the workpiece (1) to ensure that the machining allowance of the workpiece (1) is 0.3-0.5 mm; and performing secondary semi-finishing on the processing area of the cooled workpiece (1) so that the machining allowance of the workpiece (1) is 0.1-0.25 mm.
4. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 1, which is characterized by comprising the following steps: and clamping and downwards compressing the two ends of the workpiece (1), and arranging a gasket (4) between the processing machine table (5) and the workpiece (1) when the workpiece (1) is subjected to inverted arch compression.
5. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 4, which is characterized in that: the gaskets (4) are provided with three gaskets and are uniformly distributed on the bottom surface of the workpiece (1).
6. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 5, which is characterized in that: the thickness of the gasket (4) is 0.2-0.5 mm.
7. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 1, which is characterized by comprising the following steps: the processing area of the workpiece (1) is heated by adopting the flame thrower (3), and the flame thrower (3) moves and heats the processing area at a constant speed.
8. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 7, which is characterized in that: the moving speed of the flame thrower (3) is 0.5-1 m/h.
9. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 1, which is characterized by comprising the following steps: clamping is carried out on two ends of a workpiece (1) through a clamping device (2), the clamping device (2) comprises a connecting rod, a supporting block and a pressing block, the connecting rod and the supporting block are respectively arranged on a processing machine table (5), the pressing block is slidably arranged on the connecting rod, and the pressing block is abutted to the workpiece (1) to press the workpiece (1).
10. The method for processing the key structural workpiece of the automobile stamping die of the outer roof panel according to claim 9, which is characterized in that: the clamping device (2) further comprises a nut, the nut is slidably sleeved on the connecting rod, the nut is abutted to the top surface of the pressing block, and the pressing block is limited.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210407242.7A CN114653996B (en) | 2022-04-18 | 2022-04-18 | Machining method for key structural workpiece of automobile roof outer plate stamping die |
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| CN202210407242.7A CN114653996B (en) | 2022-04-18 | 2022-04-18 | Machining method for key structural workpiece of automobile roof outer plate stamping die |
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| CN114653996B true CN114653996B (en) | 2023-06-16 |
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| CN115415758B (en) * | 2022-08-03 | 2024-04-02 | 宁波南方塑料模具有限公司 | Processing method of automotive interior part tooling die |
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| CN103056615A (en) * | 2013-02-04 | 2013-04-24 | 贵州航天南海科技有限责任公司 | Processing process of array panel of array face frame parts |
| CN103586487A (en) * | 2013-11-08 | 2014-02-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preventing machining deformation of thin-walled work-piece |
| CN105033566A (en) * | 2015-09-09 | 2015-11-11 | 南京春睿精密机械有限公司 | Thin-wall thin-bottom product machining method suitable for numerical control machine tool |
| WO2019092797A1 (en) * | 2017-11-07 | 2019-05-16 | 三菱重工業株式会社 | Processing apparatus and processing method |
| CN110977330A (en) * | 2019-12-27 | 2020-04-10 | 东方电气(广州)重型机器有限公司 | Method for processing series holes of large-size thin-wall arched part |
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2022
- 2022-04-18 CN CN202210407242.7A patent/CN114653996B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103056615A (en) * | 2013-02-04 | 2013-04-24 | 贵州航天南海科技有限责任公司 | Processing process of array panel of array face frame parts |
| CN103586487A (en) * | 2013-11-08 | 2014-02-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preventing machining deformation of thin-walled work-piece |
| CN105033566A (en) * | 2015-09-09 | 2015-11-11 | 南京春睿精密机械有限公司 | Thin-wall thin-bottom product machining method suitable for numerical control machine tool |
| WO2019092797A1 (en) * | 2017-11-07 | 2019-05-16 | 三菱重工業株式会社 | Processing apparatus and processing method |
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