CN114161089B - Processing method of thin-wall aluminum connecting piece - Google Patents
Processing method of thin-wall aluminum connecting piece Download PDFInfo
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- CN114161089B CN114161089B CN202111465563.4A CN202111465563A CN114161089B CN 114161089 B CN114161089 B CN 114161089B CN 202111465563 A CN202111465563 A CN 202111465563A CN 114161089 B CN114161089 B CN 114161089B
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 238000003801 milling Methods 0.000 claims abstract description 50
- 238000012545 processing Methods 0.000 claims abstract description 46
- 238000005520 cutting process Methods 0.000 claims abstract description 35
- 230000035882 stress Effects 0.000 claims abstract description 13
- 238000007514 turning Methods 0.000 claims abstract description 8
- 230000032683 aging Effects 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 39
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 13
- 238000012797 qualification Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 40
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000737 Duralumin Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 235000007173 Abies balsamea Nutrition 0.000 description 1
- 241000218685 Tsuga Species 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum-copper-magnesium aluminum Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
- B23P17/04—Metal-working operations, not covered by a single other subclass or another group in this subclass characterised by the nature of the material involved or the kind of product independently of its shape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The application discloses a processing method of a thin-wall aluminum connecting piece, which comprises the following steps: s1, roughly turning an outer circle and an end face of a bar, roughly turning and processing the outer circle of the bar to obtain a reference surface, wherein the reference surface is parallel to a horizontal transverse central line or a horizontal longitudinal central line of a product; s2, adopting a horizontal milling machine to roughly mill a reference surface; s3, aligning a reference surface, clamping the reference surface on a vertical milling machine for two times, roughly milling two end surfaces of a bar to obtain a cavity, and reserving a plurality of bosses in the cavity; s4, aging treatment is carried out to remove stress; s5, milling the reference surface and the end surface of the bar on a vertical milling machine to ensure that the flatness of the reference surface and the end surface of the bar is 0.02mm or less; s6, aligning a reference surface and semi-finish milling a cavity; s7, drilling threaded holes and bolt through holes around the rib plates along the axis direction of the boss; s8, performing linear cutting along the contour line of the product, aligning the reference surface, and finishing the end surface, the die cavity and the mounting hole to obtain the thin-wall aluminum connecting piece. The method can effectively prevent the product from deforming in the processing process and improve the manufacturing qualification rate of the product.
Description
Technical Field
The invention relates to aluminum alloy machining, in particular to a machining method of a thin-wall aluminum connecting piece.
Background
The aluminum and aluminum alloy parts have the characteristics of light weight, easy forming, light weight and the like, and can be easily processed into mechanical parts of any shape, so that the aluminum and aluminum alloy parts are widely applied in the mechanical industry, the industrial development of China is promoted, the social development of China is finally promoted, and the importance of aluminum part processing is seen. However, because the hardness is relatively small, the thermal expansion coefficient is large, the deformation is easy to occur in the mechanical processing of thin-wall and thin-plate parts, the design form and position tolerance requirement is not easy to be met in the actual processing, the processing technology is complex, the details needing to be noted in the processing are more, and the actual operation is complex.
Referring to fig. 1, the illustrated thin-wall aluminum connecting piece comprises an integrally formed plate body 1, five bosses 11 which are arranged at intervals are arranged on the plate body 1, and mounting holes 12 are formed in the bosses 11. The plate body material with the mark of 2A12 is a typical duralumin alloy in aluminum-copper-magnesium aluminum alloy, the components are reasonable, the comprehensive performance is good, the dosage in duralumin is the largest, and the alloy is characterized in that: high strength and heat resistance, and can be used as a working part below 150 ℃. However, the aluminum piece is inevitably deformed due to heat generated by stress release, compression force and cutting in the processing process, the requirements of form and position tolerances of holes and end faces of the thin-wall aluminum connecting piece are higher, the product is provided with five bosses and is connected by a rib plate with the thickness of 4mm, the thin-wall aluminum connecting piece is typical, the rigidity is poor, all the faces need to be processed, the product is also likely to deform due to slight compression force in the clamping process, and the form and position tolerances and the hole spacing of the inner hole of the product are more difficult to control.
Disclosure of Invention
The invention aims to provide a processing method of a thin-wall aluminum connecting piece, which can effectively prevent a product from deforming in the processing process and improve the manufacturing qualification rate of the product.
The invention relates to a processing method of a thin-wall aluminum connecting piece, which comprises the following steps:
s1, roughly turning an outer circle and an end face of a bar, roughly turning and processing the outer circle of the bar to obtain a reference surface, wherein the reference surface is parallel to a horizontal transverse central line or a horizontal longitudinal central line of a product;
s2, adopting a horizontal milling machine to roughly mill a reference surface;
s3, aligning a reference surface, clamping the reference surface on a vertical milling machine for two times, roughly milling two end surfaces of a bar to obtain a cavity, and reserving a plurality of bosses in the cavity;
s4, aging treatment is carried out to remove stress;
s5, milling the reference surface and the end surface of the bar on a vertical milling machine to ensure that the flatness of the reference surface and the end surface of the bar is 0.02mm or less;
s6, aligning a reference surface and semi-finish milling a cavity;
s7, drilling threaded holes and bolt through holes around the rib plates along the axis direction of the boss;
s8, performing linear cutting along the contour line of the product, aligning the reference surface, and finishing the end surface, the die cavity and the mounting hole to obtain the thin-wall aluminum connecting piece.
Further, the single-side allowance left after S3 rough milling is set to be 2mm, and the single-side allowance left after S6 semi-finish milling is set to be 0.05mm
Further, when the cavity is roughly milled or semi-finely milled, clamping and fixing are carried out by taking the outer edge of the bar as a compression surface; and when the end face, the cavity and the mounting hole are finished, the outer contour of the product is fixed by adopting the stop block to realize clamping and fixing.
Further, in the step S3, an end mill rough milling cavity is adopted, and the processing parameters of the end mill are as follows: the rotating speed is 5000r/min, the feeding speed is 2000mm/min, and the cutting depth is 3mm; in the step S5, a plane milling cutter is adopted to mill a reference surface and a bar end face, and the processing parameters of the plane milling cutter are as follows: the linear speed is 200m/min, the feeding speed is 1800mm/min, and the cutting depth is 3mm.
Further, the S8 adopts a face milling cutter to finish the end face, and the processing parameters of the face milling cutter are as follows: the linear speed is 300m/min, the feeding speed is 1000mm/min, and the cutting depth is 0.6mm; adopting an end mill finish machining cavity, wherein the machining parameters of the end mill are as follows: the rotating speed is 7000r/min, the feeding speed is 1200mm/min, and the cutting depth is 0.5mm; adopting a finish boring cutter to finish machining the mounting hole, wherein the machining parameters of the finish boring cutter are as follows: the linear speed is 300m/min, the feeding speed is 60mm/min, and the cutting depth is 0.15mm.
Compared with the prior art, the invention has the following beneficial effects.
1. According to the invention, the machining procedures are reasonably arranged, stress is removed by adopting aging treatment after rough machining, the stress is redistributed and balanced by continuous layering machining, and the deformation of the product is controlled, namely, the deformation of the two sides of the product is gradually reduced by repeated uniform small allowance cutting until the machining requirement is met, so that the deformation of the product in the machining process is effectively prevented, and the product manufacturing qualification rate is improved.
2. According to the invention, when the cavity is roughly milled or semi-finely milled, the outer edge of the bar is used as a compression surface for clamping and fixing, so that the product is uniformly stressed in the processing process, the deformation of the product is reduced, the deformation in the processing process is reduced, and the outer edge of the bar is removed by using linear cutting after the processing is finished. The left allowance is small in finish machining, so that the chip force generated during machining is extremely small, the outer contour of a product is fixed by using a stop block instead of pressing by using a pressing plate in consideration of the structural condition of the product, the product is machined in a natural state, and the finish machining precision of the product is ensured.
3. The invention defines the cutting tools and the processing parameters of rough processing and finish processing, wherein the rough processing mainly removes redundant materials, and the finish processing is completed as quickly as possible under the condition of ensuring enough finish processing allowance, so the processing parameters are set to be small in cutting speed and large in feeding amount and cutting draft. The finish machining allowance is small, and in order to ensure the product size precision requirement, the set cutting speed is large, and the feeding amount and the cutting tool amount are small.
Drawings
FIG. 1 is a schematic view of a thin-walled aluminum connector according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic end view of a bar according to the invention.
In the figure, 1-plate body, 11-boss, 12-mounting hole, 13-contour line, 14-horizontal transverse center line, 15-horizontal longitudinal center line, 2-bar stock, 21-datum plane.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
A processing method of a thin-wall aluminum connecting piece comprises the following steps:
s1, the product blank is a phi 298 bar, the machining allowance is too large, the bar needs to be pre-machined, and the redundant part of the bar is removed. Rough turning the outer circle and the end face of the bar stock, rough turning the outer circle of the bar stock 2 to obtain reference surfaces 21, see fig. 3, wherein the reference surfaces are two mutually perpendicular surfaces, one reference surface 21 is parallel to the horizontal transverse center line 14 of the product, and the other reference surface is parallel to the horizontal longitudinal center line 15.
S2, adopting a plane milling cutter to roughen a reference surface on a horizontal milling machine, and taking the base surface as an alignment reference for subsequent processing.
And S3, aligning the reference surface, clamping the reference surface on a vertical milling machine for two times, roughly milling two end surfaces of the bar to obtain a cavity, and reserving five bosses distributed at intervals in the cavity, wherein the interval distance is limited according to design requirements. In the actual machining process, the rough machining milling cutter has unsmooth chip removal and low machining efficiency, the drill bit is used for removing the allowance of the cavity, the AL-2E-D10.0 hard alloy end milling cutter is used for milling the cavity, and the unilateral allowance is set to be 2mm. The processing parameters of the end mill are as follows: the rotating speed is 5000r/min, the feeding speed is 2000mm/min, and the cutting depth is 3mm.
S4, aging treatment removes stress, namely, the internal stress of the bar stock and the stress generated by rough machining are eliminated through aging treatment, and the problem of stress release of the product is solved.
S5, milling a reference surface and a bar end surface by adopting an APMT 160408-LHYD 101 square shoulder numerical control milling blade, namely a face milling cutter, on a vertical milling machine, wherein the processing parameters of the face milling cutter are as follows: the linear speed is 200m/min, the feeding speed is 1800mm/min, and the cutting depth is 3mm, so that the flatness of the reference surface and the end surface of the bar is 0.02mm or less.
S6, aligning the reference surface, adopting an end mill semi-finish milling cavity on a vertical milling machine, further removing allowance by utilizing semi-finish milling, releasing processing stress, reducing deformation of the product in the subsequent finish machining process, further improving form and position tolerance of the product, reserving allowance for single side by 0.05mm, adding self tolerance of the product, and correcting allowance for about 0.1 mm.
S7, drilling threaded holes and bolt through holes on the periphery of the rib plate along the axis direction of the boss by adopting a vertical milling machine, and directly processing the rib plate in place, wherein the hole pitch requirement is not high.
S8, performing linear cutting along a product contour line, then aligning a reference surface, and adopting an APMT 160408-LHYD 101 square shoulder numerical control milling blade, namely a face milling cutter to finish the end face, wherein the processing parameters of the face milling cutter are as follows: the linear speed is 300m/min, the feeding speed is 1000mm/min, and the cutting depth is 0.6mm.
Adopting an AL-2E-D10.0 hard alloy end mill finish machining cavity, wherein the machining parameters of the end mill are as follows: the rotation speed is 7000r/min, the feeding speed is 1200mm/min, and the cutting depth is 0.5mm.
Adopting CCGT09T302-PM2 WK1 fine boring cutter to finish the mounting hole, wherein the machining parameters of the fine boring cutter are as follows: the linear speed is 300m/min, the feeding speed is 60mm/min, and the cutting depth is 0.15mm. And finishing the end face, the die cavity and the mounting hole to obtain a final product, namely the thin-wall aluminum connecting piece.
When the cavity is roughly milled or semi-finely milled, the outer edge of the bar is used as a compression surface for clamping and fixing, so that the product is uniformly stressed in the processing process, the deformation of the product is reduced, the deformation in the processing process is reduced, and the outer edge of the bar is removed by wire cutting after the processing is finished. The left allowance is small in finish machining, so that the chip force generated during machining is extremely small, the outer contour of a product is fixed by using a stop block instead of pressing by using a pressing plate in consideration of the structural condition of the product, the product is machined in a natural state, and the finish machining precision of the product is ensured.
Because the product adopts high-speed processing and small-allowance processing, the product generates heat and the cutter wear is small in the processing process, and only the generation of accumulated hemlock is needed to be prevented. The built-up bits can affect the dimensional accuracy, surface roughness and tool life of the product. And (3) adopting 901CY water-based cutting fluid to cool and lubricate during rough machining and semi-finishing. During finish machining, the allowance is smaller, the cutting amount is small, a cooling means is not adopted, and scrap iron is removed at any time only by using an air blowing gun.
The invention defines the cutting tools and the processing parameters of rough processing and finish processing, wherein the rough processing mainly removes redundant materials, and the finish processing is completed as quickly as possible under the condition of ensuring enough finish processing allowance, so the processing parameters are set to be small in cutting speed and large in feeding amount and cutting draft. The finish machining allowance is small, and in order to ensure the product size precision requirement, the set cutting speed is large, and the feeding amount and the cutting tool amount are small.
According to the invention, the machining procedures are reasonably arranged, stress is removed by adopting aging treatment after rough machining, the stress is redistributed and balanced by continuous layering machining, and the deformation of the product is controlled, namely, the deformation of the two sides of the product is gradually reduced by repeated uniform small allowance cutting until the machining requirement is met, so that the deformation of the product in the machining process is effectively prevented, and the product manufacturing qualification rate is improved.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (4)
1. The processing method of the thin-wall aluminum connecting piece is characterized by comprising the following steps of:
s1, roughly turning an outer circle and an end face of a bar, roughly turning and processing the outer circle of the bar to obtain a reference surface, wherein the reference surface is parallel to a horizontal transverse central line or a horizontal longitudinal central line of a product;
s2, adopting a horizontal milling machine to roughly mill a reference surface;
s3, aligning a reference surface, clamping the reference surface on a vertical milling machine for two times, roughly milling two end surfaces of a bar to obtain a cavity, and reserving a plurality of bosses in the cavity, wherein the bosses are connected through rib plates;
s4, aging treatment is carried out to remove stress;
s5, milling the reference surface and the end surface of the bar on a vertical milling machine to ensure that the flatness of the reference surface and the end surface of the bar is 0.02mm or less;
s6, aligning a reference surface and semi-finish milling a cavity;
s7, drilling threaded holes and bolt through holes around the rib plates along the axis direction of the boss;
s8, performing linear cutting along the contour line of the product, aligning a reference surface, and finishing an end surface, a cavity and a mounting hole to obtain a thin-wall aluminum connecting piece;
when the cavity is roughly milled or semi-finely milled, clamping and fixing are carried out by taking the outer edge of the bar as a compression surface;
and when the end face, the cavity and the mounting hole are finished, the outer contour of the product is fixed by adopting the stop block to realize clamping and fixing.
2. The method of manufacturing a thin-walled aluminum connector of claim 1 wherein: the single-side allowance left after S3 rough milling is set to be 2mm, and the single-side allowance left after S6 semi-finish milling is set to be 0.05mm.
3. The method of manufacturing a thin-walled aluminum connector as claimed in claim 1 or 2, wherein: and S3, adopting an end mill to roughen a cavity, wherein the processing parameters of the end mill are as follows: the rotating speed is 5000r/min, the feeding speed is 2000mm/min, and the cutting depth is 3mm;
in the step S5, a plane milling cutter is adopted to mill a reference surface and a bar end face, and the processing parameters of the plane milling cutter are as follows: the linear speed is 200m/min, the feeding speed is 1800mm/min, and the cutting depth is 3mm.
4. The method of manufacturing a thin-walled aluminum connector as claimed in claim 1 or 2, wherein: s8, adopting a face milling cutter to finish the end face, wherein the processing parameters of the face milling cutter are as follows: the linear speed is 300m/min, the feeding speed is 1000mm/min, and the cutting depth is 0.6mm; adopting an end mill finish machining cavity, wherein the machining parameters of the end mill are as follows: the rotating speed is 7000r/min, the feeding speed is 1200mm/min, and the cutting depth is 0.5mm; adopting a finish boring cutter to finish machining the mounting hole, wherein the machining parameters of the finish boring cutter are as follows: the linear speed is 300m/min, the feeding speed is 60mm/min, and the cutting depth is 0.15mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111465563.4A CN114161089B (en) | 2021-12-03 | 2021-12-03 | Processing method of thin-wall aluminum connecting piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111465563.4A CN114161089B (en) | 2021-12-03 | 2021-12-03 | Processing method of thin-wall aluminum connecting piece |
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| Publication Number | Publication Date |
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| CN114161089A CN114161089A (en) | 2022-03-11 |
| CN114161089B true CN114161089B (en) | 2024-02-27 |
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| CN115945868A (en) * | 2022-12-30 | 2023-04-11 | 湖北三江航天红阳机电有限公司 | A kind of processing method of aluminum alloy cover plate parts |
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|---|---|---|---|---|
| GB0209113D0 (en) * | 2002-04-22 | 2002-05-29 | Rolls Royce Plc | Method or manufacturing thin wall isogrid casings |
| CN102886640A (en) * | 2012-09-04 | 2013-01-23 | 昆山市源丰铝业有限公司 | Method for machining thin-wall aluminum alloy part |
| CN104289870A (en) * | 2014-09-03 | 2015-01-21 | 安徽应流机电股份有限公司 | Machining process of thin-wall groove milling stainless steel part |
| 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 |
| WO2017080442A1 (en) * | 2015-11-10 | 2017-05-18 | 上海斐赛轴承科技有限公司 | Manufacturing method of thin section bearing, machining method of thin section inner wall/outer wall thereof, and precision flexure bearing |
| CN110026739A (en) * | 2019-04-16 | 2019-07-19 | 贵州航天风华精密设备有限公司 | A kind of processing method of the aluminium alloy thin-walled discoid part of T4 |
-
2021
- 2021-12-03 CN CN202111465563.4A patent/CN114161089B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0209113D0 (en) * | 2002-04-22 | 2002-05-29 | Rolls Royce Plc | Method or manufacturing thin wall isogrid casings |
| CN102886640A (en) * | 2012-09-04 | 2013-01-23 | 昆山市源丰铝业有限公司 | Method for machining thin-wall aluminum alloy part |
| CN104289870A (en) * | 2014-09-03 | 2015-01-21 | 安徽应流机电股份有限公司 | Machining process of thin-wall groove milling stainless steel part |
| 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 |
| WO2017080442A1 (en) * | 2015-11-10 | 2017-05-18 | 上海斐赛轴承科技有限公司 | Manufacturing method of thin section bearing, machining method of thin section inner wall/outer wall thereof, and precision flexure bearing |
| CN110026739A (en) * | 2019-04-16 | 2019-07-19 | 贵州航天风华精密设备有限公司 | A kind of processing method of the aluminium alloy thin-walled discoid part of T4 |
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