CN113547285A - Method for machining multi-section ultrathin annular piece - Google Patents
Method for machining multi-section ultrathin annular piece Download PDFInfo
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- CN113547285A CN113547285A CN202110674920.1A CN202110674920A CN113547285A CN 113547285 A CN113547285 A CN 113547285A CN 202110674920 A CN202110674920 A CN 202110674920A CN 113547285 A CN113547285 A CN 113547285A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a method for processing a multi-section ultrathin annular piece, which relates to the field of a multi-section toothed ring processing process method, and comprises the following process flows: 1. rough turning and ring cutting of the blank; 2. tempering at low temperature; 3. semi-finish turning; 4. drilling; 5. cutting a workpiece by a wire; 6. finely turning an outer circle and an inner hole; 7. and (6) drilling. The processing method of the invention fundamentally solves the problems of deformation and size out-of-tolerance in the processing process of the multi-section ultrathin piece, the production process is easy to realize, the product percent of pass is extremely high, the production cost is reduced, the purchase cost is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the field of multi-section ultrathin piece processing technique methods, in particular to a multi-section ultrathin piece processing method.
Background
The multi-section ultrathin workpiece is divided into 6 sections, wherein the thickness (height direction) of the workpiece is less than 10mm, the wall thickness (diameter direction) of the workpiece is less than 30mm, and the multi-section ultrathin workpiece has requirements on processing precision. The working condition is segmented assembly, and the size precision of the assembled workpiece is guaranteed. Due to the characteristics of the structure of the multi-section ultrathin part, multiple working procedures are carried out in the machining process, and large machining stress is accumulated in the machining process, so that after the ultrathin part is finely machined and segmented, each section generates large plastic deformation and elastic deformation.
At present, no mature processing technology exists in the field of processing the multi-section ultrathin parts in China. The existing multi-section ultrathin part has the following defects: (1) the workpiece has a large diameter and is thin, and deformation is easily generated in the machining process. (2) The ultrathin part is separated after being integrally machined, and due to the fact that machining stress is large, the generated deformation is large, precision is difficult to guarantee, waste products are easy to generate, the qualification rate is low, and the manufacturing cost is too high. Based on this, the qualified multistage ultrathin piece usually purchases the import piece, and purchasing cost is high, and purchasing cycle is long, influences the normal production of enterprise.
Disclosure of Invention
The invention aims to provide a method for processing a multi-section ultrathin piece, which well solves the problems of high processing cost and difficult control of deformation in the production process of the multi-section ultrathin piece.
The specific technical method of the invention is as follows: a method for processing a multi-section ultrathin annular piece comprises the following steps:
1) rough turning and cutting ring for blank
The upper plane and the lower plane of the co-forged blank are leveled by a minimum processing amount, the processing allowance is determined according to the process requirement, the processing allowance with a single edge of 6mm is reserved for the height, and then a 4.5mm groove cutter is used for cutting a ring;
2) low temperature tempering
Placing the workpiece after ring cutting in a low-temperature tempering furnace for tempering to eliminate internal stress, horizontally placing the workpiece when placing the workpiece, not allowing a large area of suspended workpieces, avoiding deformation of the workpiece in the tempering process, setting a heating curve, heating for 4 hours until the temperature reaches 180 ℃, preserving heat for 3 hours, then naturally cooling after turning off a power supply, and performing subsequent processing after completely cooling;
3) semi-finishing turning machine
Placing the workpiece on a 2.5-meter vertical lathe device with an electromagnetic chuck, placing the roughly-turned plane on a processing positioning tool, processing the upper plane, and flattening with the minimum processing amount;
the processing and positioning tool comprises a disc tool table and a pressing device, and the pressing device fixes a workpiece on the disc tool table;
when processing the excircle (inner hole), fixing the workpiece at the inner hole (excircle) by a pressing device; after the outer circle (inner circle) is machined, before the inner circle (outer circle) is machined, fixing a workpiece at the outer circle (inner circle) by using a pressing device, and then loosening the pressing device at the inner circle (outer circle); 2mm of allowance is reserved on the outer circle and the inner hole at the single side; after the processing is finished, turning over and processing the other plane to the size required by the drawing; chip liquid is used in the machining process, and the deformation of the workpiece is noticed;
4) first drilling
Placing a workpiece on a machining positioning tool, fixing the workpiece by using a pressing device, machining a process mounting hole according to the size requirement of a drawing mounting hole, using a bolt with the size being 1 specification lower than that of an actually used bolt, carrying out numerical control marking on a cutting position according to the cutting requirement of the drawing, and making steel seal marks on marking positions and each cutting section;
5) wire-electrode cutting workpiece
Performing linear cutting at the scribing part according to the requirement;
6) finish turning of excircle and inner bore
Splicing the cut workpieces according to steel seal marks, wherein a gap at each joint is ensured to be less than or equal to 1 mm; fixing a workpiece on a processing positioning tool by bolts through a process mounting hole, wherein each section is required to be fixed with 3 bolts (two ends and the middle part of each section);
when an excircle (inner hole) is machined, a workpiece is fixed at the position of the inner hole (excircle) by using a pressing device, after the excircle (inner hole) is machined, the workpiece is fixed at the position of the excircle (inner hole) by using the pressing device before the inner hole (excircle) is machined, and then the pressing device at the position of the inner hole (excircle) is loosened;
machining the outer circle and the inner hole to the size required by the drawing;
7) second drilling
Fixing a workpiece at the excircle (inner hole) by using a pressing device, and installing and processing the original process according to the dimension required by a drawing;
further, in the step 6), two workpieces can be stacked and fixed together through the process mounting hole for processing.
Furthermore, the pressing devices are multiple, and workpieces combined into a circular ring are fixed on the disc tooling table.
Further, closing device include that stay bolt, plane are taken clamp plate, fixing bolt and plain washer, stay bolt fixes on disc frock platform disc face, the plane is taken the clamp plate and is placed on stay bolt, fixes on disc frock platform through fixing bolt and plain washer, and the work piece both ends are taken the clamp of clamp plate and are fixed through the plane.
Further, disc frock platform include disc and base, the base passes through the clamp plate to be fixed on the disc excircle.
Compared with the prior art, the processing method provided by the invention fundamentally solves the problems of deformation and size out-of-tolerance in the processing process of the multi-section ultrathin piece, the production process is easy to realize, the product percent of pass is extremely high, the production cost is reduced, the purchase cost is reduced, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a machining positioning tool;
FIG. 2 is a diagram illustrating a state of use of the machining positioning tool;
FIG. 3 is a schematic view of a disc tooling table;
FIG. 4 is a process flow diagram;
in the figure: 1-a stay bolt; 2-lapping a pressing plate; 3-fixing the bolt; 4-a disc tooling table; 5-a workpiece; 6-flat gasket; 7-a pressing device; 401-a disc; 402-a base;
Detailed Description
The invention is further described with reference to the drawings and examples.
Examples
The workpiece processed in the embodiment is a multi-section thin-wall part which is divided into six sections, and the outer diameter of the workpiece is
An inner diameter of
The height of a single ring is 8mm, the splicing seam of each section is less than or equal to 1.4mm, the size and form and position tolerance of the non-injection is executed according to the m level in JB/T5000.9-2007, and the perpendicularity between the upper plane and the lower plane and the excircle is 0.20 mm.
As shown in fig. 1-4, a method for processing a multi-segment ultrathin piece comprises the following processing steps:
1) rough turning and cutting ring for blank
And (3) flattening the upper plane and the lower plane of the co-forged blank by using the minimum processing amount, determining the processing allowance according to the process requirement, reserving the processing allowance with a single edge of 6mm in height, and cutting the ring by using a 4.5mm groove cutter.
2) Low temperature tempering
And (3) tempering the workpiece after ring cutting is finished in a low-temperature tempering furnace to eliminate internal stress, flatly placing the workpiece when the workpiece is placed, not allowing large-area suspension, avoiding deformation of the workpiece in the tempering process, setting a temperature rise curve, heating for 4 hours until the temperature reaches 180 ℃, preserving heat for 3 hours, naturally cooling after turning off a power supply, and performing subsequent processing after complete cooling.
3) Semi-finishing turning machine
Placing the workpiece on a 2.5-meter vertical lathe device with an electromagnetic chuck, placing the roughly-turned plane on a processing positioning tool, processing the upper plane, and flattening with the minimum processing amount;
the machining and positioning tool comprises a disc tool table 4 and a pressing device 7, and the pressing device 7 fixes the workpiece 5 on the disc tool table 4.
As shown in fig. 1, the pressing device 7 comprises a supporting bolt 1, a plane pressing plate 2, a fixing bolt 3 and a flat gasket 6, the supporting bolt 1 is fixed on the disc surface of a disc tooling table 4, the plane pressing plate 2 is placed on the supporting bolt 1 and fixed on the disc tooling table 4 through the fixing bolt 3 and the flat gasket 6, and a workpiece 5 is clamped and fixed through the plane pressing plate 2.
As shown in fig. 2, a plurality of pressing devices 7 are provided to fix the workpiece 5 combined into a circular ring on the disc fixture 4.
When an excircle (inner hole) is machined, a workpiece 5 is fixed at the position of the inner hole (excircle) by using a plane lapping pressing plate 2; after the outer circle (inner circle) is machined, before the inner circle (outer circle) is machined, a workpiece 5 is fixed at the outer circle (inner circle) by using a plane lapping pressing plate 2, and then the plane lapping pressing plate 2 at the inner circle (outer circle) is loosened; 2mm of allowance is reserved on the outer circle and the inner hole at the single side; after the processing is finished, turning over and processing the other plane to the size required by the drawing; the machining process uses cutting fluid, and the deformation of the workpiece is noticed.
4) First drilling
And (3) placing a workpiece 5 on a machining positioning tool, fixing the workpiece by using a plane lapping plate 2, machining a process mounting hole according to the size requirement of a drawing mounting hole, using bolts with the specifications lower than those of actually used bolts by 1, simultaneously carrying out numerical control marking on a cutting position according to the cutting requirement of the drawing, and making steel seal marks on marking positions and each cutting section.
5) Wire-electrode cutting workpiece
According to the requirement, the line cutting is carried out at the scribing part.
6) Finish turning of excircle and inner bore
Splicing the cut workpieces 5 according to the steel seal marks, wherein the gap at each joint is ensured to be less than or equal to 1 mm; through the process mounting hole, the workpiece is fixed on the processing positioning tool by bolts, and each section is required to be fixed with 3 bolts (two ends and the middle part of each section).
When processing excircle (hole), overlap clamp plate 2 fixed work piece 5 with the plane in hole (excircle) department, after excircle (hole) processing, before processing hole (excircle), overlap clamp plate 2 fixed work piece 5 with the plane in excircle (hole) department, then loosen hole (excircle) department plane and overlap clamp plate 2.
And machining the outer circle and the inner hole to the size required by the drawing.
7) Second drilling
And (3) fixing the workpiece 5 at the excircle (inner hole) by using the plane lapping plate 2, and processing the mounting hole of the original process to the size required by the drawing.
In the step 6), two workpieces 5 may be stacked and fixed together by the process mounting hole.
As shown in fig. 3, the disc tooling table 4 includes a disc 401 and a base 402, and the base 402 is fixed on the outer circle of the disc 401 by a pressing plate.
As shown in fig. 4, the processing method of the embodiment solves the problem that the product cannot meet the drawing requirement in size due to the fact that the product is cut and deformed by the finish turning and the rear line by forward moving the linear cutting process, and can control the deformation and the final size to meet the drawing requirement by matching with the optimized process of the processing and positioning tool of the embodiment.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A method for processing a multi-section ultrathin annular piece is characterized by comprising the following steps:
1) rough turning and cutting ring for blank
The upper plane and the lower plane of the co-forged blank are leveled by a minimum processing amount, the processing allowance is determined according to the process requirement, the processing allowance with a single edge of 6mm is reserved for the height, and then a 4.5mm groove cutter is used for cutting a ring;
2) low temperature tempering
Placing the workpiece after ring cutting in a low-temperature tempering furnace for tempering to eliminate internal stress, horizontally placing the workpiece when placing the workpiece, not allowing a large area of suspended workpieces, avoiding deformation of the workpiece in the tempering process, setting a heating curve, heating for 4 hours until the temperature reaches 180 ℃, preserving heat for 3 hours, then naturally cooling after turning off a power supply, and performing subsequent processing after completely cooling;
3) semi-finishing turning machine
Placing the workpiece on a 2.5-meter vertical lathe device with an electromagnetic chuck, placing the roughly-turned plane on a processing positioning tool, processing the upper plane, and flattening with the minimum processing amount;
the machining and positioning tool comprises a disc tool table (4) and a pressing device (7), wherein the pressing device (7) fixes a workpiece (5) on the disc tool table (4);
when the outer circle is processed, a workpiece (5) is fixed at the inner hole by a pressing device (7); after the excircle is machined, before an inner hole is machined, fixing a workpiece at the excircle by using a pressing device (7), and then loosening the pressing device at the inner hole;
2mm of allowance is reserved on the outer circle and the inner hole at the single side; after the processing is finished, turning over and processing the other plane to the size required by the drawing; chip liquid is used in the machining process, and the deformation of the workpiece is noticed;
4) first drilling
Placing a workpiece (5) on a machining positioning tool, fixing the workpiece by using a pressing device (7), machining a process mounting hole according to the size requirement of a drawing mounting hole, performing numerical control marking on a cutting position according to the cutting requirement of the drawing, wherein the used bolt is 1 specification lower than the actually used bolt, and making steel seal marks on marking positions and each cutting section;
5) wire-electrode cutting workpiece
Performing linear cutting at the scribing part according to the requirement;
6) finish turning of excircle and inner bore
Splicing the cut workpieces according to steel seal marks, wherein a gap at each joint is ensured to be less than or equal to 1 mm; fixing the workpiece on a special tool by bolts through process mounting holes, wherein 3 bolts are required to be fixed on each section at two ends and the middle of each section;
when the excircle is processed, the workpiece (5) is fixed by the pressing device (7) at the inner hole, after the excircle is processed, the workpiece (5) is fixed by the pressing device (7) at the excircle before the inner hole is processed, and then the pressing device at the inner hole is loosened;
machining the outer circle and the inner hole to the size required by the drawing;
7) second drilling
And (3) fixing the workpiece (5) by using a pressing device (7) at the position of the excircle or the inner hole, and machining the mounting hole in the original process to the size required by the drawing.
2. A method for manufacturing a multi-segment ultra-thin annular member as claimed in claim 1, wherein in step 6), two workpieces (5) can be stacked and fixed together through a process mounting hole for processing.
3. A method for manufacturing a multi-segment ultra-thin annular member as claimed in claim 1, wherein the plurality of pressing devices (7) are used for fixing the workpieces (5) combined into a circular ring on the disc tooling table (4).
4. The machining method for the multi-section ultrathin ring-shaped parts as claimed in claim 3, characterized in that the pressing device (7) comprises a supporting bolt (1), a plane pressing plate (2), a fixing bolt (3) and a flat gasket (6), the supporting bolt (1) is fixed on the disc surface of a disc tooling platform (4), the plane pressing plate (2) is arranged on the supporting bolt (1) and fixed on the disc tooling platform (4) through the fixing bolt (3) and the flat gasket (6), and two ends of a workpiece (5) are clamped and fixed through the plane pressing plate (2).
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| CN202110674920.1A CN113547285B (en) | 2021-06-18 | 2021-06-18 | Method for processing multi-section ultrathin annular piece |
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| CN202110674920.1A CN113547285B (en) | 2021-06-18 | 2021-06-18 | Method for processing multi-section ultrathin annular piece |
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| CN113547285B CN113547285B (en) | 2023-08-29 |
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| JP2013193143A (en) * | 2012-03-16 | 2013-09-30 | Toyota Motor Corp | Method for manufacturing endless metal ring |
| CN104002166A (en) * | 2014-05-30 | 2014-08-27 | 济南重工股份有限公司 | Auxiliary tooling and process for machining thin wall annular part |
| CN106112400A (en) * | 2016-07-19 | 2016-11-16 | 马鞍山方圆回转支承股份有限公司 | A kind of super-large diameter multistage ring gear processing method |
| CN109366102A (en) * | 2018-11-09 | 2019-02-22 | 西安长峰机电研究所 | A kind of snap ring processing technology |
| CN109517966A (en) * | 2019-01-15 | 2019-03-26 | 常德市中天精密工具有限公司 | A kind of heat treatment method of break bar cutter ring |
| KR20190135125A (en) * | 2018-05-28 | 2019-12-06 | 주식회사 람정테크 | Manufacturing Method for Ring Flange using Flat Steel Strip |
| CN111015112A (en) * | 2019-12-23 | 2020-04-17 | 贵州凯星液力传动机械有限公司 | Machining method for thin-wall circular ring part |
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2021
- 2021-06-18 CN CN202110674920.1A patent/CN113547285B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774111A (en) * | 2010-02-08 | 2010-07-14 | 马鞍山方圆回转支承股份有限公司 | Processing method of ultra-thin annular pieces |
| JP2013193143A (en) * | 2012-03-16 | 2013-09-30 | Toyota Motor Corp | Method for manufacturing endless metal ring |
| CN104002166A (en) * | 2014-05-30 | 2014-08-27 | 济南重工股份有限公司 | Auxiliary tooling and process for machining thin wall annular part |
| CN106112400A (en) * | 2016-07-19 | 2016-11-16 | 马鞍山方圆回转支承股份有限公司 | A kind of super-large diameter multistage ring gear processing method |
| KR20190135125A (en) * | 2018-05-28 | 2019-12-06 | 주식회사 람정테크 | Manufacturing Method for Ring Flange using Flat Steel Strip |
| CN109366102A (en) * | 2018-11-09 | 2019-02-22 | 西安长峰机电研究所 | A kind of snap ring processing technology |
| CN109517966A (en) * | 2019-01-15 | 2019-03-26 | 常德市中天精密工具有限公司 | A kind of heat treatment method of break bar cutter ring |
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