CN108971585B - Processing technology for processing large annular workpiece with countersunk head of aluminum alloy by equal-thickness plate - Google Patents
Processing technology for processing large annular workpiece with countersunk head of aluminum alloy by equal-thickness plate Download PDFInfo
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- CN108971585B CN108971585B CN201810972428.0A CN201810972428A CN108971585B CN 108971585 B CN108971585 B CN 108971585B CN 201810972428 A CN201810972428 A CN 201810972428A CN 108971585 B CN108971585 B CN 108971585B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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Abstract
The invention relates to a process for processing a large annular workpiece with a countersunk head on an aluminum alloy by using equal-thickness plates, which belongs to the field of cold processing industry and comprises the following steps: (1) purchasing a plate with the same thickness as the part to process a large annular workpiece with a countersunk head; (2) the special tool realizes quick positioning, avoids locking of a machining position and shortens the length requirement of the cutter; (3) uniformly locking and compacting the workpiece; (4) and the drawing requirements are realized by matching with an effective process method. The difficulty of processing the parts by using equal-thickness plates is overcome, batch production is realized, abnormity is avoided, and the material cost and the processing cost are greatly reduced.
Description
Technical Field
The invention belongs to the technical field of cold machining processes, and particularly relates to a process for machining large annular workpieces with countersunk heads by using equal-thickness plates. The method is suitable for the professional technology of processing large annular workpieces with countersunk heads of aluminum alloy by equal-thickness plates, and relates to electronic industrial equipment.
Background
The large annular workpiece with the countersunk head is a part which is widely applied in electronic industrial equipment, so the cold machining process of the large annular workpiece with the countersunk head has special importance. The part is large and annular, the upper surface of the part is provided with a countersunk head or a sunken part, the outline edge is an R angle, the part belongs to an easily-deformed part, the processing efficiency is low by adopting a conventional processing method, and the material cost is high. If the equal-thickness plate is adopted for direct processing, the flatness of the material coming from the equal-thickness plate is basically about 0.4mm, when a counter bore is processed (the tolerance of the depth of the counter bore is 0.2mm), the out-of-tolerance of the counter bore can be directly caused, the R angle of the annular edge processed by the inner R cutter is inconsistent in size, and when the surface quality of a part is not over-standard, the size of the part is out-of-tolerance, and the part is easily scrapped.
Disclosure of Invention
Aiming at the existing problems, the invention aims to provide a processing technology for processing large annular workpieces with countersunk heads on aluminum alloy strips by equal thickness plates. The invention aims to provide a cold processing technology for processing a large annular workpiece with a countersunk head of an aluminum alloy by using equal-thickness plates.
The purpose of the invention is realized by the following technical scheme:
a processing technology for processing a large annular workpiece with a countersunk head on an aluminum alloy with an equal thickness plate comprises the following steps:
(1) purchasing a plate with the same thickness as the part to process a large annular workpiece with a countersunk head;
(2) the special tool realizes quick positioning, avoids locking of a machining position and shortens the length requirement of the cutter;
(3) uniformly locking and compacting the workpiece;
(4) and the drawing requirements are realized by matching with an effective process method.
The large annular workpiece with the countersunk head is machined by purchasing the plate with the same thickness as the part in the step (1), but the plate with the thickness of 2mm-3mm is not purchased for machining, so that the material cost is effectively reduced, and the machining cost is greatly reduced.
The special tool for the step (2) realizes quick positioning, saves alignment time, avoids locking of a machining position, does not interfere with a cutter, shortens the length requirement of the cutter, effectively improves the linear speed of the cutter, and shortens the machining time.
And (3) uniformly locking, compacting the workpiece, completely attaching the processed workpiece to the surface of the tool, and ensuring the thickness of the processed part to be consistent.
And (4) locking and compacting the part, completely attaching the lower surface of the workpiece to the upper surface of the tool, striking the surface to detect the annular upper surface of the part, directly processing the jump within the range of 0.05mm, wherein the jump is larger than 0.05mm, but the jump must be smaller than the thickness tolerance, ensuring that the total thickness meets the drawing size requirement after the removal amount, and then matching with the drawing to mill a circle on the annular surface, ensuring that the jump is smaller than 0.05 while ensuring the thickness requirement, so that the part can be ensured to be equal in thickness, fixing Z0 on the annular surface after finish machining, ensuring the depth of a countersunk hole +/-0.1, otherwise, ensuring that the rejection rate of the workpiece is 90%, processing an inner R forming cutter to process an inner shape R angle, and greatly improving.
The invention has the advantages that:
1. the large annular workpiece with the countersunk head is machined by purchasing a plate with the same thickness as the part instead of purchasing a plate with the thickness of 2mm-3mm thicker than the part, so that the material cost is effectively reduced, and the machining cost is greatly reduced.
2. The special tool is adopted to realize quick positioning, the alignment time is saved, the locking of a machining position is avoided, the interference with a cutter is avoided, the length requirement of the cutter is shortened, the linear velocity of the cutter is effectively improved, and the machining time is shortened.
3. The workpiece is uniformly locked and compacted, so that the surfaces of the machined workpiece and the tool are completely attached, and the thickness of the machined part is consistent.
4. Locking compaction part, make work piece lower surface and frock upper surface post-compaction completely, beat the table and detect part annular upper surface, but jump in 0.05mm within range directly to process, if be greater than 0.05mm (nevertheless jump must be less than thickness tolerance, guarantee that the gross thickness accords with the drawing size requirement after the removal volume), the procedure of deuterogamying execution technology establishment is milled the toroidal and is round, guarantee to jump less than 0.05 when guaranteeing the thickness requirement, just so can guarantee that the part is the same thickness, Z0 is fixed at the toroidal after the finish machining, guarantee the degree of depth of countersink 0.1, otherwise the work piece disability rate is 90%, shape R angle in the processing of R shaping cutter in using, improve machining efficiency greatly. The application tool is simple and effective, the operation is convenient, and the operation of workers is simple and understandable.
5. The special tool is locked and compacted, and the matching of the process method overcomes the difficulty of processing the parts by using equal-thickness plates, realizes batch production, has zero exception, and greatly reduces the material cost and the processing cost. If the parts are not processed according to the technical scheme, the success rate is less than 10 percent.
Drawings
Fig. 1 is a schematic view of parts.
FIG. 2 is a schematic diagram of M in FIG. 1.
FIG. 3 is a schematic view of the positioning of the blank equal-thickness plate.
FIG. 4 is a schematic view of the positioning of a part to be machined.
FIG. 5 is a schematic view of part processing.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
A processing technology for processing a large annular workpiece with a countersunk head on an aluminum alloy with an equal thickness plate comprises the following steps:
(1) purchasing a plate with the same thickness as the part to process a large annular workpiece with a countersunk head;
(2) the special tool realizes quick positioning, avoids locking of a machining position and shortens the length requirement of the cutter;
(3) uniformly locking and compacting the workpiece;
(4) and the drawing requirements are realized by matching with an effective process method.
The large annular workpiece with the countersunk head is machined by purchasing the plate with the same thickness as the part in the step (1), but the plate with the thickness of 2mm-3mm is not purchased for machining, so that the material cost is effectively reduced, and the machining cost is greatly reduced.
The special tool for the step (2) realizes quick positioning, saves alignment time, avoids locking of a machining position, does not interfere with a cutter, shortens the length requirement of the cutter, effectively improves the linear speed of the cutter, and shortens the machining time.
And (3) uniformly locking, compacting the workpiece, completely attaching the processed workpiece to the surface of the tool, and ensuring the thickness of the processed part to be consistent.
And (4) locking and compacting the part, completely attaching the lower surface of the workpiece to the upper surface of the tool, striking the surface to detect the annular upper surface of the part, directly processing the jump within the range of 0.05mm, wherein the jump is larger than 0.05mm, but the jump must be smaller than the thickness tolerance, ensuring that the total thickness meets the drawing size requirement after the removal amount, and then matching with the drawing to mill a circle on the annular surface, ensuring that the jump is smaller than 0.05 while ensuring the thickness requirement, so that the part can be ensured to be equal in thickness, fixing Z0 on the annular surface after finish machining, ensuring the depth of a countersunk hole +/-0.1, otherwise, ensuring that the rejection rate of the workpiece is 90%, processing an inner R forming cutter to process an inner shape R angle, and greatly improving.
The special tool comprises a tool bottom plate, wherein fixing buckles are arranged on four corners of the tool bottom plate, two positioning pins are arranged on the transverse edge, and two positioning pins are arranged on the longitudinal edge. And fixing the blank equal-thickness plate through the positioning pin and the fixing buckle.
Examples
1. An actual chart in a large annular workpiece with a countersunk head is shown in figures 1 and 2, the tolerance of the countersunk head degree shown at the position 1 is +/-0.2 mm, the tolerance of the depth of a sunken groove shown at the position 2 is +/-0.1 mm, and the equal R angles of the inner circle and the outer circle of the upper surface and the lower surface shown at the position 3 are respectively adopted, if an equal-thickness plate is adopted for direct processing, the depth of the countersunk head hole and the sunken groove of a part can be directly out of tolerance due to uncontrollable planeness (basically about 0.4 mm), the R angles can be different in size no matter what kind of tool is adopted for processing, the surface is seriously poor in connection, and the part is scrapped.
2. Therefore, before machining, a special tool is designed, 4 phi 10 positioning pins are used for realizing rapid positioning of the part, and after the four corners of the blank are locked by the pressing plate, through holes required by the locking part are drilled as shown in figure 3;
3. the screw passes through the locking hole, the part is locked on the tool, and the bottom surface of the part is compacted (0.03mm clearance gauge is inferior), as shown in figure 4;
4. the upper surface of the ring of the part can be directly processed if the run-out is within 0.05mm, if the run-out is larger than 0.05mm (but the run-out is smaller than the thickness tolerance, the total thickness meets the drawing size requirement after the removal amount is ensured), the ring is milled for one circle by matching with the program of executing the process programming, the run-out is ensured to be smaller than 0.05 while the thickness requirement is ensured, so that the part can be ensured to be equal in thickness, Z0 is fixed on the ring surface after the finish machining, the depth tolerance of a machined countersunk hole is +/-2 mm, the depth tolerance of a sunken groove is +/-0.2 mm, and the R angle is leveled with the upper surface, as shown in figure 5.
Claims (2)
1. A processing technology for processing a large annular workpiece with a counter sink on an aluminum alloy by using equal-thickness plates is characterized by comprising the following steps of: the method comprises the following steps:
(1) purchasing a plate with the same thickness as that of the large annular workpiece with the counter sink, and processing the large annular workpiece with the counter sink; instead of purchasing a plate with the thickness of 2mm-3mm larger than that of the large annular workpiece with the counter sink for processing;
(2) the special tool realizes quick positioning, avoids locking of a machining position and shortens the length requirement of the cutter;
(3) uniformly locking and compacting equal thickness plates;
(4) the drawing requirements are realized by matching with an effective process method;
the special tool comprises a tool bottom plate, wherein fixing buckles are arranged on four corners of the tool bottom plate, two positioning pins are arranged on the transverse edge, and two positioning pins are arranged on the longitudinal edge;
drilling through holes required by locking the equal-thickness plates, wherein the through holes are positioned at two sides of an annular surface of the equal-thickness plates where a large annular workpiece to be processed is positioned, and a screw penetrates through the through holes to be locked so as to lock the equal-thickness plates on a tool bottom plate;
after the lower surface of the equal-thickness plate and the upper surface of the tool bottom plate are completely attached, the ring surface where a large annular workpiece to be machined is located on the equal-thickness plate is subjected to surface beating detection, jumping can be directly machined within the range of 0.05mm and is larger than 0.05mm, but jumping is certainly smaller than thickness tolerance, the total thickness meets the requirement of drawing size after removal amount is ensured, the ring surface is milled for one circle by matching, jumping is ensured to be smaller than 0.05mm while the requirement of thickness is ensured, the depth +/-0.1 mm of a countersunk hole is ensured, and an inner R forming tool is used for machining an inner appearance R angle.
2. The process for processing the large annular workpiece with the counter sink on the aluminum alloy with the equal thickness plate as claimed in claim 1, wherein the process comprises the following steps:
the special tool for the step (2) realizes quick positioning, saves alignment time, avoids locking of a machining position, does not interfere with a cutter, shortens the length requirement of the cutter, effectively improves the linear speed of the cutter, and shortens the machining time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810972428.0A CN108971585B (en) | 2018-08-24 | 2018-08-24 | Processing technology for processing large annular workpiece with countersunk head of aluminum alloy by equal-thickness plate |
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| CN201810972428.0A CN108971585B (en) | 2018-08-24 | 2018-08-24 | Processing technology for processing large annular workpiece with countersunk head of aluminum alloy by equal-thickness plate |
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| CN108971585B true CN108971585B (en) | 2020-07-24 |
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| CN112846657A (en) * | 2020-12-31 | 2021-05-28 | 沈阳富创精密设备股份有限公司 | Processing technology of part distribution disc of semiconductor PECVD (plasma enhanced chemical vapor deposition) equipment |
| CN113441917B (en) * | 2021-07-15 | 2022-12-09 | 东北轻合金有限责任公司 | Machining method of integral structural member of high-strength aluminum alloy thick plate for aviation |
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| EP2119800A1 (en) * | 1999-05-28 | 2009-11-18 | Honda Giken Kogyo Kabushiki Kaisha | Method of manufacturing laminated ring and heat treatment apparatus for use in such method |
| FR2928282A1 (en) * | 2008-03-05 | 2009-09-11 | Cmw Const Mecaniques Des Vosge | PROCESS FOR PRODUCING PLATES OF METAL, ALONE OR IN HOMOGENEOUS ALLOYS, BY CENTRIFUGATION |
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| RU2506322C1 (en) * | 2012-07-23 | 2014-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Башкирский государственный аграрный университет" | Method of making ring valve split rings |
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Address after: No.18a-1, Feiyun Road, Hunnan District, Shenyang City, Liaoning Province Patentee after: Shenyang fuchuang precision equipment Co.,Ltd. Address before: No.18a-1, Feiyun Road, Dongling District, Shenyang, Liaoning Province, 110000 Patentee before: Shenyang Fortune Precision Equipment Co.,Ltd. |
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